/*******************************************************************************
* Copyright (c) 2006, 2012 Oracle and/or its affiliates. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation
*
******************************************************************************/
package org.eclipse.persistence.jpa.jpql;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.persistence.jpa.jpql.parser.AbsExpression;
import org.eclipse.persistence.jpa.jpql.parser.AbstractConditionalClause;
import org.eclipse.persistence.jpa.jpql.parser.AbstractDoubleEncapsulatedExpression;
import org.eclipse.persistence.jpa.jpql.parser.AbstractEncapsulatedExpression;
import org.eclipse.persistence.jpa.jpql.parser.AbstractExpressionVisitor;
import org.eclipse.persistence.jpa.jpql.parser.AbstractFromClause;
import org.eclipse.persistence.jpa.jpql.parser.AbstractPathExpression;
import org.eclipse.persistence.jpa.jpql.parser.AbstractSchemaName;
import org.eclipse.persistence.jpa.jpql.parser.AbstractSelectClause;
import org.eclipse.persistence.jpa.jpql.parser.AbstractSelectStatement;
import org.eclipse.persistence.jpa.jpql.parser.AbstractSingleEncapsulatedExpression;
import org.eclipse.persistence.jpa.jpql.parser.AbstractTripleEncapsulatedExpression;
import org.eclipse.persistence.jpa.jpql.parser.AdditionExpression;
import org.eclipse.persistence.jpa.jpql.parser.AggregateFunction;
import org.eclipse.persistence.jpa.jpql.parser.AllOrAnyExpression;
import org.eclipse.persistence.jpa.jpql.parser.AndExpression;
import org.eclipse.persistence.jpa.jpql.parser.ArithmeticExpression;
import org.eclipse.persistence.jpa.jpql.parser.ArithmeticExpressionBNF;
import org.eclipse.persistence.jpa.jpql.parser.ArithmeticFactor;
import org.eclipse.persistence.jpa.jpql.parser.ArithmeticPrimaryBNF;
import org.eclipse.persistence.jpa.jpql.parser.ArithmeticTermBNF;
import org.eclipse.persistence.jpa.jpql.parser.AvgFunction;
import org.eclipse.persistence.jpa.jpql.parser.BadExpression;
import org.eclipse.persistence.jpa.jpql.parser.BetweenExpression;
import org.eclipse.persistence.jpa.jpql.parser.CaseExpression;
import org.eclipse.persistence.jpa.jpql.parser.CoalesceExpression;
import org.eclipse.persistence.jpa.jpql.parser.CollectionExpression;
import org.eclipse.persistence.jpa.jpql.parser.CollectionMemberDeclaration;
import org.eclipse.persistence.jpa.jpql.parser.CollectionMemberExpression;
import org.eclipse.persistence.jpa.jpql.parser.CollectionValuedPathExpression;
import org.eclipse.persistence.jpa.jpql.parser.CollectionValuedPathExpressionBNF;
import org.eclipse.persistence.jpa.jpql.parser.ComparisonExpression;
import org.eclipse.persistence.jpa.jpql.parser.CompoundExpression;
import org.eclipse.persistence.jpa.jpql.parser.ConcatExpression;
import org.eclipse.persistence.jpa.jpql.parser.ConditionalExpressionBNF;
import org.eclipse.persistence.jpa.jpql.parser.ConstructorExpression;
import org.eclipse.persistence.jpa.jpql.parser.CountFunction;
import org.eclipse.persistence.jpa.jpql.parser.DateTime;
import org.eclipse.persistence.jpa.jpql.parser.DeleteClause;
import org.eclipse.persistence.jpa.jpql.parser.DeleteStatement;
import org.eclipse.persistence.jpa.jpql.parser.DivisionExpression;
import org.eclipse.persistence.jpa.jpql.parser.EmptyCollectionComparisonExpression;
import org.eclipse.persistence.jpa.jpql.parser.EntityTypeLiteral;
import org.eclipse.persistence.jpa.jpql.parser.EntryExpression;
import org.eclipse.persistence.jpa.jpql.parser.ExistsExpression;
import org.eclipse.persistence.jpa.jpql.parser.Expression;
import org.eclipse.persistence.jpa.jpql.parser.FromClause;
import org.eclipse.persistence.jpa.jpql.parser.FunctionExpression;
import org.eclipse.persistence.jpa.jpql.parser.GroupByClause;
import org.eclipse.persistence.jpa.jpql.parser.HavingClause;
import org.eclipse.persistence.jpa.jpql.parser.IdentificationVariable;
import org.eclipse.persistence.jpa.jpql.parser.IdentificationVariableBNF;
import org.eclipse.persistence.jpa.jpql.parser.IdentificationVariableDeclaration;
import org.eclipse.persistence.jpa.jpql.parser.InExpression;
import org.eclipse.persistence.jpa.jpql.parser.IndexExpression;
import org.eclipse.persistence.jpa.jpql.parser.InputParameter;
import org.eclipse.persistence.jpa.jpql.parser.JPQLExpression;
import org.eclipse.persistence.jpa.jpql.parser.JPQLGrammar;
import org.eclipse.persistence.jpa.jpql.parser.JPQLQueryBNF;
import org.eclipse.persistence.jpa.jpql.parser.Join;
import org.eclipse.persistence.jpa.jpql.parser.JoinAssociationPathExpressionBNF;
import org.eclipse.persistence.jpa.jpql.parser.JoinBNF;
import org.eclipse.persistence.jpa.jpql.parser.KeyExpression;
import org.eclipse.persistence.jpa.jpql.parser.KeywordExpression;
import org.eclipse.persistence.jpa.jpql.parser.LengthExpression;
import org.eclipse.persistence.jpa.jpql.parser.LikeExpression;
import org.eclipse.persistence.jpa.jpql.parser.LikeExpressionEscapeCharacterBNF;
import org.eclipse.persistence.jpa.jpql.parser.LocateExpression;
import org.eclipse.persistence.jpa.jpql.parser.LogicalExpression;
import org.eclipse.persistence.jpa.jpql.parser.LowerExpression;
import org.eclipse.persistence.jpa.jpql.parser.MaxFunction;
import org.eclipse.persistence.jpa.jpql.parser.MinFunction;
import org.eclipse.persistence.jpa.jpql.parser.ModExpression;
import org.eclipse.persistence.jpa.jpql.parser.MultiplicationExpression;
import org.eclipse.persistence.jpa.jpql.parser.NotExpression;
import org.eclipse.persistence.jpa.jpql.parser.NullComparisonExpression;
import org.eclipse.persistence.jpa.jpql.parser.NullExpression;
import org.eclipse.persistence.jpa.jpql.parser.NullIfExpression;
import org.eclipse.persistence.jpa.jpql.parser.NumericLiteral;
import org.eclipse.persistence.jpa.jpql.parser.ObjectExpression;
import org.eclipse.persistence.jpa.jpql.parser.OnClause;
import org.eclipse.persistence.jpa.jpql.parser.OrExpression;
import org.eclipse.persistence.jpa.jpql.parser.OrderByClause;
import org.eclipse.persistence.jpa.jpql.parser.OrderByItem;
import org.eclipse.persistence.jpa.jpql.parser.RangeDeclarationBNF;
import org.eclipse.persistence.jpa.jpql.parser.RangeVariableDeclaration;
import org.eclipse.persistence.jpa.jpql.parser.ResultVariable;
import org.eclipse.persistence.jpa.jpql.parser.SelectClause;
import org.eclipse.persistence.jpa.jpql.parser.SelectStatement;
import org.eclipse.persistence.jpa.jpql.parser.SimpleFromClause;
import org.eclipse.persistence.jpa.jpql.parser.SimpleSelectClause;
import org.eclipse.persistence.jpa.jpql.parser.SimpleSelectStatement;
import org.eclipse.persistence.jpa.jpql.parser.SizeExpression;
import org.eclipse.persistence.jpa.jpql.parser.SqrtExpression;
import org.eclipse.persistence.jpa.jpql.parser.StateFieldPathExpression;
import org.eclipse.persistence.jpa.jpql.parser.StringLiteral;
import org.eclipse.persistence.jpa.jpql.parser.SubExpression;
import org.eclipse.persistence.jpa.jpql.parser.SubstringExpression;
import org.eclipse.persistence.jpa.jpql.parser.SubtractionExpression;
import org.eclipse.persistence.jpa.jpql.parser.SumFunction;
import org.eclipse.persistence.jpa.jpql.parser.TreatExpression;
import org.eclipse.persistence.jpa.jpql.parser.TrimExpression;
import org.eclipse.persistence.jpa.jpql.parser.TypeExpression;
import org.eclipse.persistence.jpa.jpql.parser.UnknownExpression;
import org.eclipse.persistence.jpa.jpql.parser.UpdateClause;
import org.eclipse.persistence.jpa.jpql.parser.UpdateItem;
import org.eclipse.persistence.jpa.jpql.parser.UpdateStatement;
import org.eclipse.persistence.jpa.jpql.parser.UpperExpression;
import org.eclipse.persistence.jpa.jpql.parser.ValueExpression;
import org.eclipse.persistence.jpa.jpql.parser.WhenClause;
import org.eclipse.persistence.jpa.jpql.parser.WhereClause;
import org.eclipse.persistence.jpa.jpql.spi.JPAVersion;
import static org.eclipse.persistence.jpa.jpql.JPQLQueryProblemMessages.*;
import static org.eclipse.persistence.jpa.jpql.parser.Expression.*;
/**
* The base validator responsible to gather the problems found in a JPQL query by validating it
* against the provided JPQL grammar. The semantic of the JPQL query is not validated by this visitor.
* <p>
* Provisional API: This interface is part of an interim API that is still under development and
* expected to change significantly before reaching stability. It is available at this early stage
* to solicit feedback from pioneering adopters on the understanding that any code that uses this
* API will almost certainly be broken (repeatedly) as the API evolves.
*
* @see AbstractSemanticValidator
*
* @version 2.4.1
* @since 2.4
* @author Pascal Filion
*/
@SuppressWarnings("nls")
public abstract class AbstractGrammarValidator extends AbstractValidator {
/**
* This visitor determines whether the visited {@link Expression} is the {@link CollectionExpression}.
*/
private CollectionExpressionVisitor collectionExpressionVisitor;
/**
* This validator validates a {@link CollectionExpression} by making sure each item is separated
* by a comma.
*/
private CollectionSeparatedByCommaValidator collectionSeparatedByCommaValidator;
/**
* This validator validates a {@link CollectionExpression} by making sure each item is separated
* by a space.
*/
private CollectionSeparatedBySpaceValidator collectionSeparatedBySpaceValidator;
/**
* This visitor is responsible to retrieve the visited {@link Expression} if it is a
* {@link ComparisonExpression}.
*/
private ComparisonExpressionVisitor comparisonExpressionVisitor;
/**
* The registered expression helper mapped by the unique JPQL identifier of the same expression
* to validate.
*/
private Map<String, Object> helpers;
/**
* The cached {@link InputParameter InputParameters} that are present in the entire JPQL query.
*/
private Collection<InputParameter> inputParameters;
/**
* The {@link JPQLGrammar} that defines how the JPQL query was parsed.
*/
private JPQLGrammar jpqlGrammar;
/**
* Creates a new <code>AbstractGrammarValidator</code>.
*
* @param jpqlGrammar The {@link JPQLGrammar} that defines how the JPQL query was parsed, which
* cannot be <code>null</code>
* @exception NullPointerException If the given {@link JPQLGrammar} is <code>null</code>
*/
protected AbstractGrammarValidator(JPQLGrammar jpqlGrammar) {
super();
Assert.isNotNull(jpqlGrammar, "The JPQLGrammar cannot be null");
this.jpqlGrammar = jpqlGrammar;
}
protected AbstractSingleEncapsulatedExpressionHelper<AbsExpression> absExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<AbsExpression> helper = getHelper(ABS);
if (helper == null) {
helper = buildAbsExpressionHelper();
registerHelper(ABS, helper);
}
return helper;
}
protected AbstractSingleEncapsulatedExpressionHelper<AllOrAnyExpression> allOrAnyExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<AllOrAnyExpression> helper = getHelper(ALL);
if (helper == null) {
helper = buildAllOrAnyExpressionHelper();
registerHelper(ALL, helper);
}
return helper;
}
protected AbstractSingleEncapsulatedExpressionHelper<AvgFunction> avgFunctionHelper() {
AbstractSingleEncapsulatedExpressionHelper<AvgFunction> helper = getHelper(AVG);
if (helper == null) {
helper = buildAvgFunctionHelper();
registerHelper(AVG, helper);
}
return helper;
}
protected AbstractSingleEncapsulatedExpressionHelper<AbsExpression> buildAbsExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<AbsExpression>() {
@Override
public String encapsulatedExpressionInvalidKey(AbsExpression expression) {
return AbsExpression_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(AbsExpression expression) {
return AbsExpression_MissingExpression;
}
public String leftParenthesisMissingKey(AbsExpression expression) {
return AbsExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(AbsExpression expression) {
return AbsExpression_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<AllOrAnyExpression> buildAllOrAnyExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<AllOrAnyExpression>() {
@Override
public String[] arguments(AllOrAnyExpression expression) {
return new String[] { expression.getIdentifier() };
}
@Override
public String encapsulatedExpressionInvalidKey(AllOrAnyExpression expression) {
return AllOrAnyExpression_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(AllOrAnyExpression expression) {
return AllOrAnyExpression_MissingExpression;
}
public String leftParenthesisMissingKey(AllOrAnyExpression expression) {
return AllOrAnyExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(AllOrAnyExpression expression) {
return AllOrAnyExpression_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<AvgFunction> buildAvgFunctionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<AvgFunction>() {
@Override
public String encapsulatedExpressionInvalidKey(AvgFunction expression) {
return AvgFunction_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(AvgFunction expression) {
return AvgFunction_MissingExpression;
}
public String leftParenthesisMissingKey(AvgFunction expression) {
return AvgFunction_MissingLeftParenthesis;
}
@Override
public int lengthBeforeEncapsulatedExpression(AvgFunction expression) {
return (expression.hasDistinct() ? 8 /* DISTINCT */ : 0) +
(expression.hasSpaceAfterDistinct() ? 1 : 0);
}
public String rightParenthesisMissingKey(AvgFunction expression) {
return AvgFunction_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<CoalesceExpression> buildCoalesceExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<CoalesceExpression>() {
@Override
public String encapsulatedExpressionInvalidKey(CoalesceExpression expression) {
return CoalesceExpression_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(CoalesceExpression expression) {
return CoalesceExpression_MissingExpression;
}
public String leftParenthesisMissingKey(CoalesceExpression expression) {
return CoalesceExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(CoalesceExpression expression) {
return CoalesceExpression_MissingRightParenthesis;
}
};
}
/**
* Creates a visitor that collects the {@link CollectionExpression} if it's been visited.
*
* @return A new {@link CollectionExpressionVisitor}
*/
protected CollectionExpressionVisitor buildCollectionExpressionVisitor() {
return new CollectionExpressionVisitor();
}
protected AbstractSingleEncapsulatedExpressionHelper<ConcatExpression> buildConcatExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<ConcatExpression>() {
@Override
public String encapsulatedExpressionInvalidKey(ConcatExpression expression) {
return ConcatExpression_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(ConcatExpression expression) {
return ConcatExpression_MissingExpression;
}
@Override
public boolean isEncapsulatedExpressionValid(ConcatExpression expression) {
// Done in visit(ConcatExpression)
return true;
}
public String leftParenthesisMissingKey(ConcatExpression expression) {
return ConcatExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(ConcatExpression expression) {
return ConcatExpression_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<CountFunction> buildCountFunctionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<CountFunction>() {
@Override
public String encapsulatedExpressionInvalidKey(CountFunction expression) {
return CountFunction_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(CountFunction expression) {
return CountFunction_MissingExpression;
}
public String leftParenthesisMissingKey(CountFunction expression) {
return CountFunction_MissingLeftParenthesis;
}
@Override
public int lengthBeforeEncapsulatedExpression(CountFunction expression) {
return (expression.hasDistinct() ? 8 /* DISTINCT */ : 0) +
(expression.hasSpaceAfterDistinct() ? 1 : 0);
}
public String rightParenthesisMissingKey(CountFunction expression) {
return CountFunction_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<EntryExpression> buildEntryExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<EntryExpression>() {
@Override
public String encapsulatedExpressionInvalidKey(EntryExpression expression) {
return EntryExpression_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(EntryExpression expression) {
return EntryExpression_MissingExpression;
}
@Override
public boolean isEncapsulatedExpressionValid(EntryExpression expression) {
return isValid(expression.getExpression(), IdentificationVariableBNF.ID);
}
public String leftParenthesisMissingKey(EntryExpression expression) {
return EntryExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(EntryExpression expression) {
return EntryExpression_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<ExistsExpression> buildExistsExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<ExistsExpression>() {
@Override
public String encapsulatedExpressionInvalidKey(ExistsExpression expression) {
return ExistsExpression_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(ExistsExpression expression) {
return ExistsExpression_MissingExpression;
}
public String leftParenthesisMissingKey(ExistsExpression expression) {
return ExistsExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(ExistsExpression expression) {
return ExistsExpression_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<FunctionExpression> buildFunctionExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<FunctionExpression>() {
@Override
public String[] arguments(FunctionExpression expression) {
return new String[] { expression.getIdentifier() };
}
@Override
@SuppressWarnings("fallthrough")
protected String encapsulatedExpressionInvalidKey(FunctionExpression expression) {
switch (expression.getParameterCount()) {
case ONE: {
Expression children = expression.getExpression();
int childrenCount = getChildren(children).size();
if (childrenCount > 1) {
return FunctionExpression_MoreThanOneExpression;
}
}
case ZERO: {
return FunctionExpression_HasExpression;
}
default: {
return FunctionExpression_InvalidExpression;
}
}
}
@Override
@SuppressWarnings("fallthrough")
protected String encapsulatedExpressionMissingKey(FunctionExpression expression) {
switch (expression.getParameterCount()) {
case ONE: {
Expression children = expression.getExpression();
int childrenCount = getChildren(children).size();
if (childrenCount == 0) {
return FunctionExpression_MissingOneExpression;
}
}
default: {
return FunctionExpression_MissingExpression;
}
}
}
@Override
protected boolean isEncapsulatedExpressionMissing(FunctionExpression expression) {
switch (expression.getParameterCount()) {
case ONE:
case ONE_OR_MANY: return !expression.hasExpression();
default: return false;
}
}
@Override
protected boolean isEncapsulatedExpressionValid(FunctionExpression expression) {
switch (expression.getParameterCount()) {
case ONE: {
return isValid(
expression.getExpression(),
expression.encapsulatedExpressionBNF()
);
}
case ONE_OR_MANY: {
return isValidWithChildCollectionBypass(
expression.getExpression(),
expression.encapsulatedExpressionBNF()
);
}
case ZERO_OR_ONE: {
return !expression.hasExpression() ||
isValid(expression.getExpression(), expression.encapsulatedExpressionBNF());
}
default: {
return true;
}
}
}
public String leftParenthesisMissingKey(FunctionExpression expression) {
return null; // never happens
}
@Override
protected int lengthBeforeEncapsulatedExpression(FunctionExpression expression) {
return expression.getFunctionName().length() +
(expression.hasComma() ? 1 : 0) +
(expression.hasSpaceAfterComma() ? 1 : 0);
}
public String rightParenthesisMissingKey(FunctionExpression expression) {
return FunctionExpression_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<IndexExpression> buildIndexExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<IndexExpression>() {
@Override
public String encapsulatedExpressionInvalidKey(IndexExpression expression) {
return IndexExpression_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(IndexExpression expression) {
return IndexExpression_MissingExpression;
}
@Override
public boolean isEncapsulatedExpressionValid(IndexExpression expression) {
return isValid(expression.getExpression(), IdentificationVariableBNF.ID);
}
public String leftParenthesisMissingKey(IndexExpression expression) {
return IndexExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(IndexExpression expression) {
return IndexExpression_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<KeyExpression> buildKeyExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<KeyExpression>() {
@Override
public String encapsulatedExpressionInvalidKey(KeyExpression expression) {
return KeyExpression_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(KeyExpression expression) {
return KeyExpression_MissingExpression;
}
@Override
public boolean isEncapsulatedExpressionValid(KeyExpression expression) {
return isValid(expression.getExpression(), IdentificationVariableBNF.ID);
}
public String leftParenthesisMissingKey(KeyExpression expression) {
return KeyExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(KeyExpression expression) {
return KeyExpression_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<LengthExpression> buildLengthExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<LengthExpression>() {
@Override
public String encapsulatedExpressionInvalidKey(LengthExpression expression) {
return LengthExpression_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(LengthExpression expression) {
return LengthExpression_MissingExpression;
}
public String leftParenthesisMissingKey(LengthExpression expression) {
return LengthExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(LengthExpression expression) {
return LengthExpression_MissingRightParenthesis;
}
};
}
protected AbstractTripleEncapsulatedExpressionHelper<LocateExpression> buildLocateExpressionHelper() {
return new AbstractTripleEncapsulatedExpressionHelper<LocateExpression>() {
@Override
protected String firstCommaMissingKey() {
return LocateExpression_MissingFirstComma;
}
@Override
protected String firstExpressionInvalidKey() {
return LocateExpression_InvalidFirstExpression;
}
@Override
protected String firstExpressionMissingKey() {
return LocateExpression_MissingFirstExpression;
}
public String identifier(LocateExpression expression) {
return LOCATE;
}
public String leftParenthesisMissingKey(LocateExpression expression) {
return LocateExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(LocateExpression expression) {
return LocateExpression_MissingRightParenthesis;
}
@Override
protected String secondCommaMissingKey() {
return LocateExpression_MissingSecondComma;
}
@Override
protected String secondExpressionInvalidKey() {
return LocateExpression_InvalidSecondExpression;
}
@Override
protected String secondExpressionMissingKey() {
return LocateExpression_MissingSecondExpression;
}
@Override
protected String thirdExpressionInvalidKey() {
return LocateExpression_InvalidThirdExpression;
}
@Override
protected String thirdExpressionMissingKey() {
return LocateExpression_MissingThirdExpression;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<LowerExpression> buildLowerExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<LowerExpression>() {
@Override
public String encapsulatedExpressionInvalidKey(LowerExpression expression) {
return LowerExpression_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(LowerExpression expression) {
return LowerExpression_MissingExpression;
}
public String leftParenthesisMissingKey(LowerExpression expression) {
return LowerExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(LowerExpression expression) {
return LowerExpression_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<MaxFunction> buildMaxFunctionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<MaxFunction>() {
@Override
public String encapsulatedExpressionInvalidKey(MaxFunction expression) {
return MaxFunction_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(MaxFunction expression) {
return MaxFunction_MissingExpression;
}
public String leftParenthesisMissingKey(MaxFunction expression) {
return MaxFunction_MissingLeftParenthesis;
}
@Override
public int lengthBeforeEncapsulatedExpression(MaxFunction expression) {
return (expression.hasDistinct() ? 8 /* DISTINCT */ : 0) +
(expression.hasSpaceAfterDistinct() ? 1 : 0);
}
public String rightParenthesisMissingKey(MaxFunction expression) {
return MaxFunction_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<MinFunction> buildMinFunctionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<MinFunction>() {
@Override
public String encapsulatedExpressionInvalidKey(MinFunction expression) {
return MinFunction_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(MinFunction expression) {
return MinFunction_MissingExpression;
}
public String leftParenthesisMissingKey(MinFunction expression) {
return MinFunction_MissingLeftParenthesis;
}
@Override
public int lengthBeforeEncapsulatedExpression(MinFunction expression) {
return (expression.hasDistinct() ? 8 /* DISTINCT */ : 0) +
(expression.hasSpaceAfterDistinct() ? 1 : 0);
}
public String rightParenthesisMissingKey(MinFunction expression) {
return MinFunction_MissingRightParenthesis;
}
};
}
protected AbstractDoubleEncapsulatedExpressionHelper<ModExpression> buildModExpressionHelper() {
return new AbstractDoubleEncapsulatedExpressionHelper<ModExpression>() {
@Override
protected String firstExpressionInvalidKey() {
return ModExpression_InvalidFirstExpression;
}
@Override
protected String firstExpressionMissingKey() {
return ModExpression_MissingFirstExpression;
}
public String leftParenthesisMissingKey(ModExpression expression) {
return ModExpression_MissingLeftParenthesis;
}
@Override
protected String missingCommaKey() {
return ModExpression_MissingComma;
}
public String rightParenthesisMissingKey(ModExpression expression) {
return ModExpression_MissingRightParenthesis;
}
@Override
protected String secondExpressionInvalidKey() {
return ModExpression_InvalidSecondExpression;
}
@Override
protected String secondExpressionMissingKey() {
return ModExpression_MissingSecondExpression;
}
};
}
/**
* Creates a visitor that collects the {@link NullExpression} if it's been visited.
*
* @return A new {@link NullExpressionVisitor}
*/
protected NullExpressionVisitor buildNullExpressionVisitor() {
return new NullExpressionVisitor();
}
protected AbstractDoubleEncapsulatedExpressionHelper<NullIfExpression> buildNullIfExpressionHelper() {
return new AbstractDoubleEncapsulatedExpressionHelper<NullIfExpression>() {
@Override
public String firstExpressionInvalidKey() {
return NullIfExpression_InvalidFirstExpression;
}
@Override
public String firstExpressionMissingKey() {
return NullIfExpression_MissingFirstExpression;
}
public String leftParenthesisMissingKey(NullIfExpression expression) {
return NullIfExpression_MissingLeftParenthesis;
}
@Override
public String missingCommaKey() {
return NullIfExpression_MissingComma;
}
public String rightParenthesisMissingKey(NullIfExpression expression) {
return NullIfExpression_MissingRightParenthesis;
}
@Override
public String secondExpressionInvalidKey() {
return NullIfExpression_InvalidSecondExpression;
}
@Override
public String secondExpressionMissingKey() {
return NullIfExpression_MissingSecondExpression;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<ObjectExpression> buildObjectExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<ObjectExpression>() {
@Override
public String encapsulatedExpressionInvalidKey(ObjectExpression expression) {
return ObjectExpression_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(ObjectExpression expression) {
return ObjectExpression_MissingExpression;
}
@Override
public boolean isEncapsulatedExpressionValid(ObjectExpression expression) {
return isValid(expression.getExpression(), IdentificationVariableBNF.ID);
}
public String leftParenthesisMissingKey(ObjectExpression expression) {
return ObjectExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(ObjectExpression expression) {
return ObjectExpression_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<SizeExpression> buildSizeExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<SizeExpression>() {
@Override
public String encapsulatedExpressionInvalidKey(SizeExpression expression) {
return SizeExpression_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(SizeExpression expression) {
return SizeExpression_MissingExpression;
}
public String leftParenthesisMissingKey(SizeExpression expression) {
return SizeExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(SizeExpression expression) {
return SizeExpression_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<SqrtExpression> buildSqrtExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<SqrtExpression>() {
@Override
public String encapsulatedExpressionInvalidKey(SqrtExpression expression) {
return SqrtExpression_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(SqrtExpression expression) {
return SqrtExpression_MissingExpression;
}
public String leftParenthesisMissingKey(SqrtExpression expression) {
return SqrtExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(SqrtExpression expression) {
return SqrtExpression_MissingRightParenthesis;
}
};
}
protected AbstractTripleEncapsulatedExpressionHelper<SubstringExpression> buildSubstringExpressionHelper() {
return new AbstractTripleEncapsulatedExpressionHelper<SubstringExpression>() {
@Override
protected String firstCommaMissingKey() {
return SubstringExpression_MissingFirstComma;
}
@Override
protected String firstExpressionInvalidKey() {
return SubstringExpression_InvalidFirstExpression;
}
@Override
protected String firstExpressionMissingKey() {
return SubstringExpression_MissingFirstExpression;
}
public String identifier(SubstringExpression expression) {
return SUBSTRING;
}
public String leftParenthesisMissingKey(SubstringExpression expression) {
return SubstringExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(SubstringExpression expression) {
return SubstringExpression_MissingRightParenthesis;
}
@Override
protected String secondCommaMissingKey() {
return SubstringExpression_MissingSecondComma;
}
@Override
protected String secondExpressionInvalidKey() {
return SubstringExpression_InvalidSecondExpression;
}
@Override
protected String secondExpressionMissingKey() {
return SubstringExpression_MissingSecondExpression;
}
@Override
protected String thirdExpressionInvalidKey() {
return SubstringExpression_InvalidThirdExpression;
}
@Override
protected String thirdExpressionMissingKey() {
return SubstringExpression_MissingThirdExpression;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<SumFunction> buildSumFunctionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<SumFunction>() {
@Override
public String encapsulatedExpressionInvalidKey(SumFunction expression) {
return SumFunction_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(SumFunction expression) {
return SumFunction_MissingExpression;
}
public String leftParenthesisMissingKey(SumFunction expression) {
return SumFunction_MissingLeftParenthesis;
}
@Override
public int lengthBeforeEncapsulatedExpression(SumFunction expression) {
return (expression.hasDistinct() ? 8 /* DISTINCT */ : 0) +
(expression.hasSpaceAfterDistinct() ? 1 : 0);
}
public String rightParenthesisMissingKey(SumFunction expression) {
return SumFunction_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<TrimExpression> buildTrimExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<TrimExpression>() {
@Override
public String encapsulatedExpressionInvalidKey(TrimExpression expression) {
return TrimExpression_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(TrimExpression expression) {
return TrimExpression_MissingExpression;
}
@Override
public boolean isEncapsulatedExpressionMissing(TrimExpression expression) {
// Done in visit(TrimExpression)
return false;
}
@Override
public boolean isEncapsulatedExpressionValid(TrimExpression expression) {
// Done in visit(TrimExpression)
return true;
}
public String leftParenthesisMissingKey(TrimExpression expression) {
return TrimExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(TrimExpression expression) {
return TrimExpression_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<TypeExpression> buildTypeExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<TypeExpression>() {
@Override
public String encapsulatedExpressionInvalidKey(TypeExpression expression) {
return TypeExpression_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(TypeExpression expression) {
return TypeExpression_MissingExpression;
}
public String leftParenthesisMissingKey(TypeExpression expression) {
return TypeExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(TypeExpression expression) {
return TypeExpression_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<UpperExpression> buildUpperExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<UpperExpression>() {
@Override
public String encapsulatedExpressionInvalidKey(UpperExpression expression) {
return UpperExpression_InvalidExpression;
}
@Override
public String encapsulatedExpressionMissingKey(UpperExpression expression) {
return UpperExpression_MissingExpression;
}
public String leftParenthesisMissingKey(UpperExpression expression) {
return UpperExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(UpperExpression expression) {
return UpperExpression_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<ValueExpression> buildValueExpressionHelper() {
return new AbstractSingleEncapsulatedExpressionHelper<ValueExpression>() {
@Override
protected String encapsulatedExpressionInvalidKey(ValueExpression expression) {
return ValueExpression_InvalidExpression;
}
@Override
protected String encapsulatedExpressionMissingKey(ValueExpression expression) {
return ValueExpression_MissingExpression;
}
@Override
protected boolean isEncapsulatedExpressionValid(ValueExpression expression) {
return isValid(expression.getExpression(), IdentificationVariableBNF.ID);
}
public String leftParenthesisMissingKey(ValueExpression expression) {
return ValueExpression_MissingLeftParenthesis;
}
public String rightParenthesisMissingKey(ValueExpression expression) {
return ValueExpression_MissingRightParenthesis;
}
};
}
protected AbstractSingleEncapsulatedExpressionHelper<CoalesceExpression> coalesceExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<CoalesceExpression> helper = getHelper(COALESCE);
if (helper == null) {
helper = buildCoalesceExpressionHelper();
registerHelper(COALESCE, helper);
}
return helper;
}
protected CollectionSeparatedByCommaValidator collectionSeparatedByCommaValidator() {
if (collectionSeparatedByCommaValidator == null) {
collectionSeparatedByCommaValidator = new CollectionSeparatedByCommaValidator();
}
return collectionSeparatedByCommaValidator;
}
protected CollectionSeparatedBySpaceValidator collectionSeparatedBySpaceValidator() {
if (collectionSeparatedBySpaceValidator == null) {
collectionSeparatedBySpaceValidator = new CollectionSeparatedBySpaceValidator();
}
return collectionSeparatedBySpaceValidator;
}
protected ComparisonExpressionVisitor comparisonExpressionVisitor() {
if (comparisonExpressionVisitor == null) {
comparisonExpressionVisitor = new ComparisonExpressionVisitor();
}
return comparisonExpressionVisitor;
}
protected AbstractSingleEncapsulatedExpressionHelper<ConcatExpression> concatExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<ConcatExpression> helper = getHelper(CONCAT);
if (helper == null) {
helper = buildConcatExpressionHelper();
registerHelper(CONCAT, helper);
}
return helper;
}
protected AbstractSingleEncapsulatedExpressionHelper<CountFunction> countFunctionHelper() {
AbstractSingleEncapsulatedExpressionHelper<CountFunction> helper = getHelper(COUNT);
if (helper == null) {
helper = buildCountFunctionHelper();
registerHelper(COUNT, helper);
}
return helper;
}
/**
* {@inheritDoc}
*/
@Override
public void dispose() {
inputParameters.clear();
super.dispose();
}
protected AbstractSingleEncapsulatedExpressionHelper<EntryExpression> entryExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<EntryExpression> helper = getHelper(ENTRY);
if (helper == null) {
helper = buildEntryExpressionHelper();
registerHelper(ENTRY, helper);
}
return helper;
}
protected AbstractSingleEncapsulatedExpressionHelper<ExistsExpression> existsExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<ExistsExpression> helper = getHelper(EXISTS);
if (helper == null) {
helper = buildExistsExpressionHelper();
registerHelper(EXISTS, helper);
}
return helper;
}
protected AbstractSingleEncapsulatedExpressionHelper<FunctionExpression> functionExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<FunctionExpression> helper = getHelper(FUNCTION);
if (helper == null) {
helper = buildFunctionExpressionHelper();
registerHelper(FUNCTION, helper);
}
return helper;
}
/**
* Casts the given {@link Expression} to a {@link CollectionExpression} if it is actually an
* object of that type.
*
* @param expression The {@link Expression} to cast
* @return The given {@link Expression} if it is a {@link CollectionExpression} or <code>null</code>
* if it is any other object
*/
protected CollectionExpression getCollectionExpression(Expression expression) {
CollectionExpressionVisitor visitor = getCollectionExpressionVisitor();
try {
expression.accept(visitor);
return visitor.expression;
}
finally {
visitor.expression = null;
}
}
/**
* Returns the visitor that collects the {@link CollectionExpression} if it's been visited.
*
* @return The {@link CollectionExpressionVisitor}
* @see #buildCollectionExpressionVisitor()
*/
protected CollectionExpressionVisitor getCollectionExpressionVisitor() {
if (collectionExpressionVisitor == null) {
collectionExpressionVisitor = buildCollectionExpressionVisitor();
}
return collectionExpressionVisitor;
}
/**
* {@inheritDoc}
*/
@Override
protected JPQLGrammar getGrammar() {
return jpqlGrammar;
}
/**
* Returns the registered helper that was cached with the given id.
*
* @param id The key used to retrieve the cached helper, if one was cached
* @return Either the cached helper or <code>null</code> if no helper was previously cached for
* the given id
*/
@SuppressWarnings("unchecked")
protected <T> T getHelper(String id) {
return (T) helpers.get(id);
}
protected AbstractSingleEncapsulatedExpressionHelper<IndexExpression> indexExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<IndexExpression> helper = getHelper(INDEX);
if (helper == null) {
helper = buildIndexExpressionHelper();
registerHelper(INDEX, helper);
}
return helper;
}
/**
* {@inheritDoc}
*/
@Override
protected void initialize() {
super.initialize();
helpers = new HashMap<String, Object>();
inputParameters = new ArrayList<InputParameter>();
}
protected boolean isChildOfComparisonExpession(AllOrAnyExpression expression) {
ComparisonExpressionVisitor visitor = comparisonExpressionVisitor();
BypassParentSubExpressionVisitor bypassVisitor = getBypassParentSubExpressionVisitor();
try {
bypassVisitor.visitor = visitor;
expression.getParent().accept(visitor);
return visitor.expression != null;
}
finally {
bypassVisitor.visitor = null;
visitor.expression = null;
}
}
/**
* Determines whether the given {@link Expression} is a {@link CollectionExpression}.
*
* @param expression The {@link Expression} to verify
* @return <code>true</code> if the given given {@link Expression} is a {@link CollectionExpression};
* <code>false</code> otherwise
*/
protected boolean isCollectionExpression(Expression expression) {
return getCollectionExpression(expression) != null;
}
protected boolean isInputParameterInValidLocation(InputParameter expression) {
OwningClauseVisitor visitor = getOwningClauseVisitor();
try {
expression.accept(visitor);
return visitor.whereClause != null ||
visitor.havingClause != null;
}
finally {
visitor.dispose();
}
}
/**
* Determines whether a <code><b>JOIN FETCH</b></code> expression can be identified by with an
* identification variable or not.
*
* @return <code>true</code> if the expression can have an identification variable;
* <code>false</code> otherwise
*/
protected abstract boolean isJoinFetchIdentifiable();
/**
* Determines whether the JPA version defined by the JPQL grammar is 1.0.
*
* @return <code>true</code> if the JPQL grammar was defined for JPA 1.0; <code>false</code> if
* it was defined for a more recent version
*/
protected boolean isJPA1_0() {
return getJPAVersion() == JPAVersion.VERSION_1_0;
}
/**
* Determines whether the JPA version defined by the JPQL grammar is 2.0.
*
* @return <code>true</code> if the JPQL grammar was defined for JPA 2.0; <code>false</code> if
* it was defined for a more recent version
*/
protected boolean isJPA2_0() {
return getJPAVersion() == JPAVersion.VERSION_2_0;
}
/**
* Determines whether the JPA version defined by the JPQL grammar is 2.1.
*
* @return <code>true</code> if the JPQL grammar was defined for JPA 2.1; <code>false</code> if
* it was defined for a more recent version
*/
protected boolean isJPA2_1() {
return getJPAVersion() == JPAVersion.VERSION_2_1;
}
/**
* Determines whether the JPA version for which the JPQL grammar was defined represents a version
* that is newer than the given version.
*
* @param version The constant to verify if it's representing a version that is older than this one
* @return <code>true</code> if this constant represents a newer version and the given constant
* represents a version that is older; <code>false</code> if the given constant represents a
* newer and this constant represents an older version
*/
protected final boolean isNewerThan(JPAVersion version) {
return getJPAVersion().isNewerThan(version);
}
/**
* Determines whether the JPA version for which the JPQL grammar was defined represents a version
* that is newer than the given version or if it's the same version.
*
* @param version The constant to verify if it's representing a version that is older than this
* one or if it's the same than this one
* @return <code>true</code> if this constant represents a newer version and the given constant
* represents a version that is older or if it's the same constant; <code>false</code> if the
* given constant represents a newer and this constant represents an older version
*/
protected final boolean isNewerThanOrEqual(JPAVersion version) {
return getJPAVersion().isNewerThanOrEqual(version);
}
/**
* Determines whether the given sequence of characters is a numeric literal or not. There are
* two types of numeric literal that is supported:
* <ul>
* <li type=square>Decimal literal</li>
* <li type=square>Hexadecimal literal</li>
* </ul>
*
* @param text The sequence of characters to validate
* @return <code>true</code> if the given sequence of characters is a valid numeric literal;
* <code>false</code> otherwise
*/
protected boolean isNumericLiteral(String text) {
// The ending 'l' or 'L' for a long number has to be removed, Java will not parse it
if (text.endsWith("l") || text.endsWith("L")) {
text = text.substring(0, text.length() - 1);
}
// Simply try to parse it as a double number (integer and hexadecimal are handled as well)
try {
Double.parseDouble(text);
return true;
}
catch (Exception e2) {
return false;
}
}
/**
* Determines whether the JPA version for which the JPQL grammar was defined represents a version
* that is older than the given version.
*
* @param version The constant to verify if it's representing a version that is more recent
* than this one
* @return <code>true</code> if this constant represents an earlier version and the given
* constant represents a version that is more recent; <code>false</code> if the given constant
* represents an earlier version and this constant represents a more recent version
*/
protected final boolean isOlderThan(JPAVersion version) {
return getJPAVersion().isOlderThan(version);
}
/**
* Determines whether the JPA version for which the JPQL grammar was defined represents a version
* that is older than the given version or if it's the same version.
*
* @param version The constant to verify if it's representing a version that is more recent than
* this one or if it's the same than this one
* @return <code>true</code> if this constant represents an earlier version and the given
* constant represents a version that is more recent or if it's the same constant; <code>false</code>
* if the given constant represents an earlier version and this constant represents a more recent
* version
*/
protected final boolean isOlderThanOrEqual(JPAVersion version) {
return getJPAVersion().isOlderThanOrEqual(version);
}
/**
* Determines whether the given {@link Expression} is a child of the <b>WHERE</b> or <b>HAVING</b>
* clause of the top-level query.
*
* @param expression The {@link Expression} to visit its parent hierarchy up to the clause
* @return <code>true</code> if the first parent being a clause is the <b>WHERE</b> or <b>HAVING</b>
* clause; <code>false</code> otherwise
*/
protected boolean isOwnedByConditionalClause(Expression expression) {
OwningClauseVisitor visitor = getOwningClauseVisitor();
try {
expression.accept(visitor);
return visitor.whereClause != null ||
visitor.havingClause != null;
}
finally {
visitor.dispose();
}
}
/**
* Determines whether the given {@link Expression} is a child of the <b>FROM</b> clause of the
* top-level query.
*
* @param expression The {@link Expression} to visit its parent hierarchy up to the clause
* @return <code>true</code> if the first parent being a clause is the top-level <b>FROM</b>
* clause; <code>false</code> otherwise
*/
protected boolean isOwnedByFromClause(Expression expression) {
OwningClauseVisitor visitor = getOwningClauseVisitor();
try {
expression.accept(visitor);
return visitor.fromClause != null;
}
finally {
visitor.dispose();
}
}
/**
* Determines whether the given {@link Expression} is a child of the <b>FROM</b> clause of a
* subquery.
*
* @param expression The {@link Expression} to visit its parent hierarchy up to the clause
* @return <code>true</code> if the first parent being a clause is the <b>FROM</b> clause of a
* subquery; <code>false</code> otherwise
*/
protected boolean isOwnedBySubFromClause(Expression expression) {
OwningClauseVisitor visitor = getOwningClauseVisitor();
try {
expression.accept(visitor);
return visitor.simpleFromClause != null;
}
finally {
visitor.dispose();
}
}
/**
* Determines whether a subquery can be used in any clause of the top-level query.
*
* @return <code>true</code> if a subquery can be defined in any clause; <code>false</code> if
* it can only be used within the <code>WHERE</code> and <code>HAVING</code> defined by the JPA
* 1.0 and 2.0 specification document
*/
protected abstract boolean isSubqueryAllowedAnywhere();
/**
* Determines whether the given variable is a valid Java identifier, which means it follows the
* Java specification. The first letter has to be a Java identifier start and the others have to
* be Java identifier parts.
*
* @param variable The variable to validate
* @return <code>true</code> if the given variable follows the Java identifier specification;
* <code>false</code> otherwise
*/
protected boolean isValidJavaIdentifier(String variable) {
for (int index = 0, count = variable.length(); index < count; index++) {
int character = variable.charAt(index);
if ((index == 0) && !Character.isJavaIdentifierStart(character)) {
return false;
}
if ((index > 0) && !Character.isJavaIdentifierPart(character)) {
return false;
}
}
return true;
}
protected AbstractSingleEncapsulatedExpressionHelper<KeyExpression> keyExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<KeyExpression> helper = getHelper(KEY);
if (helper == null) {
helper = buildKeyExpressionHelper();
registerHelper(KEY, helper);
}
return helper;
}
protected AbstractSingleEncapsulatedExpressionHelper<LengthExpression> lengthExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<LengthExpression> helper = getHelper(LENGTH);
if (helper == null) {
helper = buildLengthExpressionHelper();
registerHelper(LENGTH, helper);
}
return helper;
}
protected AbstractTripleEncapsulatedExpressionHelper<LocateExpression> locateExpressionHelper() {
AbstractTripleEncapsulatedExpressionHelper<LocateExpression> helper = getHelper(LOCATE);
if (helper == null) {
helper = buildLocateExpressionHelper();
registerHelper(LOCATE, helper);
}
return helper;
}
protected AbstractSingleEncapsulatedExpressionHelper<LowerExpression> lowerExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<LowerExpression> helper = getHelper(LOWER);
if (helper == null) {
helper = buildLowerExpressionHelper();
registerHelper(LOWER, helper);
}
return helper;
}
protected AbstractSingleEncapsulatedExpressionHelper<MaxFunction> maxFunctionHelper() {
AbstractSingleEncapsulatedExpressionHelper<MaxFunction> helper = getHelper(MAX);
if (helper == null) {
helper = buildMaxFunctionHelper();
registerHelper(MAX, helper);
}
return helper;
}
protected AbstractSingleEncapsulatedExpressionHelper<MinFunction> minFunctionHelper() {
AbstractSingleEncapsulatedExpressionHelper<MinFunction> helper = getHelper(MIN);
if (helper == null) {
helper = buildMinFunctionHelper();
registerHelper(MIN, helper);
}
return helper;
}
protected AbstractDoubleEncapsulatedExpressionHelper<ModExpression> modExpressionHelper() {
AbstractDoubleEncapsulatedExpressionHelper<ModExpression> helper = getHelper(MOD);
if (helper == null) {
helper = buildModExpressionHelper();
registerHelper(MOD, helper);
}
return helper;
}
protected AbstractDoubleEncapsulatedExpressionHelper<NullIfExpression> nullIfExpressionHelper() {
AbstractDoubleEncapsulatedExpressionHelper<NullIfExpression> helper = getHelper(NULLIF);
if (helper == null) {
helper = buildNullIfExpressionHelper();
registerHelper(NULLIF, helper);
}
return helper;
}
protected AbstractSingleEncapsulatedExpressionHelper<ObjectExpression> objectExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<ObjectExpression> helper = getHelper(OBJECT);
if (helper == null) {
helper = buildObjectExpressionHelper();
registerHelper(OBJECT, helper);
}
return helper;
}
protected int position(Expression expression, int... extras) {
int position = position(expression);
for (int extra : extras) {
position += extra;
}
return position;
}
/**
* Registers the given helper.
*
* @param id The key used to cache the given helper
* @param helper The helper to cache for future use
*/
protected void registerHelper(String id, Object helper) {
helpers.put(id, helper);
}
protected AbstractSingleEncapsulatedExpressionHelper<SizeExpression> sizeExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<SizeExpression> helper = getHelper(SIZE);
if (helper == null) {
helper = buildSizeExpressionHelper();
registerHelper(SIZE, helper);
}
return helper;
}
protected AbstractSingleEncapsulatedExpressionHelper<SqrtExpression> sqrtExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<SqrtExpression> helper = getHelper(SQRT);
if (helper == null) {
helper = buildSqrtExpressionHelper();
registerHelper(SQRT, helper);
}
return helper;
}
protected AbstractTripleEncapsulatedExpressionHelper<SubstringExpression> substringExpressionHelper() {
AbstractTripleEncapsulatedExpressionHelper<SubstringExpression> helper = getHelper(SUBSTRING);
if (helper == null) {
helper = buildSubstringExpressionHelper();
registerHelper(SUBSTRING, helper);
}
return helper;
}
protected AbstractSingleEncapsulatedExpressionHelper<SumFunction> sumFunctionHelper() {
AbstractSingleEncapsulatedExpressionHelper<SumFunction> helper = getHelper(SUM);
if (helper == null) {
helper = buildSumFunctionHelper();
registerHelper(SUM, helper);
}
return helper;
}
protected AbstractSingleEncapsulatedExpressionHelper<TrimExpression> trimExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<TrimExpression> helper = getHelper(TRIM);
if (helper == null) {
helper = buildTrimExpressionHelper();
registerHelper(TRIM, helper);
}
return helper;
}
protected AbstractSingleEncapsulatedExpressionHelper<TypeExpression> typeExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<TypeExpression> helper = getHelper(TYPE);
if (helper == null) {
helper = buildTypeExpressionHelper();
registerHelper(TYPE, helper);
}
return helper;
}
protected AbstractSingleEncapsulatedExpressionHelper<UpperExpression> upperExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<UpperExpression> helper = getHelper(UPPER);
if (helper == null) {
helper = buildUpperExpressionHelper();
registerHelper(UPPER, helper);
}
return helper;
}
protected void validateAbstractConditionalClause(AbstractConditionalClause expression,
String missingConditionalExpressionMessageKey,
String invalidConditionalExpressionMessageKey) {
// Missing conditional expression
if (!expression.hasConditionalExpression()) {
int startPosition = position(expression);
int endPosition = startPosition +
expression.getIdentifier().length() +
(expression.hasSpaceAfterIdentifier() ? 1 : 0);
addProblem(expression, startPosition, endPosition, missingConditionalExpressionMessageKey);
}
else {
Expression conditionalExpression = expression.getConditionalExpression();
// Invalid conditional expression
// Example: "... WHERE foo() = 1", right now it's parsed as 3 expressions
if (getChildren(conditionalExpression).size() > 1) {
int startPosition = position(conditionalExpression);
int endPosition = startPosition + length(conditionalExpression);
addProblem(expression, startPosition, endPosition, invalidConditionalExpressionMessageKey);
}
else {
// Invalid conditional expression
if (!isValid(conditionalExpression, ConditionalExpressionBNF.ID)) {
int startPosition = position(conditionalExpression);
int endPosition = startPosition + length(conditionalExpression);
addProblem(expression, startPosition, endPosition, invalidConditionalExpressionMessageKey);
}
// Visit the conditional expression
conditionalExpression.accept(this);
}
}
}
/**
* Validates the content of an {@link AbstractDoubleEncapsulatedExpression}, which encapsulates
* two expressions separated by a comma.
*
* @param expression The {@link AbstractDoubleEncapsulatedExpression} to validate
* @param helper This helper is used to retrieve specific information related to the {@link
* AbstractDoubleEncapsulatedExpression expression} being validated
*/
protected <T extends AbstractDoubleEncapsulatedExpression>
void validateAbstractDoubleEncapsulatedExpression
(T expression, AbstractDoubleEncapsulatedExpressionHelper<T> helper) {
String identifier = helper.identifier(expression);
// Missing '('
if (!helper.hasLeftParenthesis(expression)) {
int startPosition = position(expression) + identifier.length();
addProblem(expression, startPosition, helper.leftParenthesisMissingKey(expression));
}
else {
// Missing first expression
if (!helper.hasFirstExpression(expression)) {
int startPosition = position(expression) +
identifier.length() +
1 /* '(' */;
addProblem(expression, startPosition, helper.firstExpressionMissingKey());
}
// Invalid first expression
else if (!helper.isFirstExpressionValid(expression)) {
int startPosition = position(expression) +
identifier.length() +
1 /* ( */;
int endPosition = startPosition +
helper.firstExpressionLength(expression);
addProblem(expression, startPosition, endPosition, helper.firstExpressionInvalidKey());
}
else {
expression.getFirstExpression().accept(this);
}
// Missing comma
if (!helper.hasComma(expression)) {
int startPosition = position(expression) +
identifier.length() +
1 /* ( */ +
helper.firstExpressionLength(expression);
addProblem(expression, startPosition, helper.missingCommaKey());
}
// After ','
else {
// Missing second expression
if (!helper.hasSecondExpression(expression)) {
int startPosition = position(expression) +
identifier.length() +
1 /* ( */ +
helper.firstExpressionLength(expression) +
(expression.hasComma() ? 1 : 0) +
(expression.hasSpaceAfterComma() ? 1 : 0);
addProblem(expression, startPosition, helper.secondExpressionMissingKey());
}
// Invalid second expression
else if (!helper.isSecondExpressionValid(expression)) {
int startPosition = position(expression) +
identifier.length() +
1 /* ( */ +
helper.firstExpressionLength(expression) +
(expression.hasComma() ? 1 : 0) +
(expression.hasSpaceAfterComma() ? 1 : 0);
int endPosition = startPosition + helper.secondExpressionLength(expression);
addProblem(expression, startPosition, endPosition, helper.secondExpressionInvalidKey());
}
else {
expression.getSecondExpression().accept(this);
}
}
}
// Missing ')'
if (!helper.hasRightParenthesis(expression)) {
int startPosition = position(expression) +
identifier.length() +
1 /* ( */ +
helper.firstExpressionLength(expression) +
(expression.hasComma() ? 1 : 0) +
(expression.hasSpaceAfterComma() ? 1 : 0) +
length(expression.getSecondExpression());
addProblem(expression, startPosition, helper.rightParenthesisMissingKey(expression));
}
}
protected void validateAbstractFromClause(AbstractFromClause expression) {
// Missing declaration
if (!expression.hasDeclaration()) {
int startPosition = position(expression) +
4 /* FROM */ +
(expression.hasSpaceAfterFrom() ? 1 : 0);
addProblem(expression, startPosition, AbstractFromClause_MissingIdentificationVariableDeclaration);
}
else {
Expression declaration = expression.getDeclaration();
// Two identification variable declarations have to be separated by a comma and
// the FROM clause cannot end with a comma
validateCollectionSeparatedByComma(
declaration,
AbstractFromClause_IdentificationVariableDeclarationEndsWithComma,
AbstractFromClause_IdentificationVariableDeclarationIsMissingComma
);
// Validate the declaration
declaration.accept(this);
}
}
/**
* Validates the select expression of the given <code>SELECT</code> clause. The select expression
* will only be visited if its JPQL query BNF is part of the select item BNF.
*
* @param expression The {@link AbstractSelectClause} to validate
* @param multipleSelectItemsAllowed Determines whether the <code><b>SELECT</b></code> can have
* one or more select expression or not
*/
protected void validateAbstractSelectClause(AbstractSelectClause expression,
boolean multipleSelectItemsAllowed) {
// Missing select expression
if (!expression.hasSelectExpression()) {
int startPosition = position(expression) +
6 /* SELECT */ +
(expression.hasSpaceAfterSelect() ? 1 : 0) +
(expression.hasDistinct() ? 8 : 0) +
(expression.hasSpaceAfterDistinct() ? 1 : 0);
addProblem(expression, startPosition, AbstractSelectClause_MissingSelectExpression);
}
else {
Expression selectExpression = expression.getSelectExpression();
// Check for collection expression first
if (isCollectionExpression(selectExpression)) {
// The SELECT clause does not support a collection of select expressions
if (!multipleSelectItemsAllowed) {
int startPosition = position(expression) +
6 /* SELECT */ +
(expression.hasSpaceAfterSelect() ? 1 : 0) +
(expression.hasDistinct() ? 8 : 0) +
(expression.hasSpaceAfterDistinct() ? 1 : 0);
int endPosition = startPosition + length(selectExpression);
addProblem(selectExpression, startPosition, endPosition, SimpleSelectClause_NotSingleExpression);
}
// Visit the select expression
else {
selectExpression.accept(this);
}
}
// The select expression is not valid
else if (!isValid(selectExpression, expression.selectItemBNF())) {
int startPosition = position(expression) +
6 /* SELECT */ +
(expression.hasSpaceAfterSelect() ? 1 : 0) +
(expression.hasDistinct() ? 8 : 0) +
(expression.hasSpaceAfterDistinct() ? 1 : 0);
int endPosition = startPosition + length(selectExpression);
addProblem(expression, startPosition, endPosition, AbstractSelectClause_InvalidSelectExpression);
}
// Visit the select expression
else {
selectExpression.accept(this);
}
}
}
protected void validateAbstractSelectStatement(AbstractSelectStatement expression) {
// Does not have a FROM clause
if (!expression.hasFromClause()) {
int startPosition = position(expression) +
length(expression.getSelectClause()) +
(expression.hasSpaceAfterSelect() ? 1 : 0);
addProblem(expression, startPosition, AbstractSelectStatement_FromClauseMissing);
}
}
protected <T extends AbstractSingleEncapsulatedExpression>
void validateAbstractSingleEncapsulatedExpression
(T expression, AbstractSingleEncapsulatedExpressionHelper<T> helper) {
String identifier = helper.identifier(expression);
// Missing '('
if (!helper.hasLeftParenthesis(expression)) {
int startPosition = position(expression) + identifier.length();
addProblem(
expression,
startPosition,
helper.leftParenthesisMissingKey(expression),
helper.arguments(expression)
);
}
// Missing encapsulated expression
else if (helper.isEncapsulatedExpressionMissing(expression)) {
int startPosition = position(expression) +
identifier.length() +
1 /* '(' */ +
helper.lengthBeforeEncapsulatedExpression(expression);
addProblem(
expression,
startPosition,
helper.encapsulatedExpressionMissingKey(expression),
helper.arguments(expression)
);
}
// Validate the encapsulated expression
else {
// The encapsulated expression is not valid
if (!helper.isEncapsulatedExpressionValid(expression)) {
int startPosition = position(expression) +
identifier.length() +
1 /* '(' */ +
helper.lengthBeforeEncapsulatedExpression(expression);
int endPosition = startPosition + helper.encapsulatedExpressionLength(expression);
addProblem(
expression,
startPosition,
endPosition,
helper.encapsulatedExpressionInvalidKey(expression),
helper.arguments(expression)
);
}
// Now visit the encapsulated expression
else {
super.visit(expression);
}
}
// Missing ')'
if (!helper.hasRightParenthesis(expression)) {
int startPosition = position(expression) + length(expression);
addProblem(
expression,
startPosition,
helper.rightParenthesisMissingKey(expression),
helper.arguments(expression)
);
}
}
protected <T extends AbstractTripleEncapsulatedExpression>
void validateAbstractTripleEncapsulatedExpression
(T expression, AbstractTripleEncapsulatedExpressionHelper<T> helper) {
String identifier = helper.identifier(expression);
// Missing '('
if (!helper.hasLeftParenthesis(expression)) {
int startPosition = position(expression) + identifier.length();
addProblem(expression, startPosition, helper.leftParenthesisMissingKey(expression));
}
else {
// Missing first expression
if (!helper.hasFirstExpression(expression)) {
int startPosition = position(expression) +
identifier.length() +
1 /* ( */;
addProblem(expression, startPosition, helper.firstExpressionMissingKey());
}
// Invalid first expression
else if (!helper.isFirstExpressionValid(expression)) {
int startPosition = position(expression) +
identifier.length() +
1 /* ( */;
int endPosition = startPosition + helper.firstExpressionLength(expression);
addProblem(expression, startPosition, endPosition, helper.firstExpressionInvalidKey());
}
else {
expression.getFirstExpression().accept(this);
}
// Missing first comma
if (helper.hasFirstExpression(expression) &&
!expression.hasFirstComma()) {
int startPosition = position(expression) +
identifier.length() +
1 /* ( */ +
helper.firstExpressionLength(expression);
addProblem(expression, startPosition, helper.firstCommaMissingKey());
}
// Validate second expression
if (expression.hasFirstComma()) {
// Missing second expression
if (!helper.hasSecondExpression(expression)) {
int startPosition = position(expression) +
identifier.length() +
1 /* ( */ +
helper.firstExpressionLength(expression) +
(expression.hasFirstComma() ? 1 : 0) +
(expression.hasSpaceAfterFirstComma() ? 1 : 0);
addProblem(expression, startPosition, helper.secondExpressionMissingKey());
}
// Invalid second expression
else if (!helper.isSecondExpressionValid(expression)) {
int startPosition = position(expression) +
identifier.length() +
1 /* ( */ +
helper.firstExpressionLength(expression) +
(expression.hasFirstComma() ? 1 : 0) +
(expression.hasSpaceAfterFirstComma() ? 1 : 0);
int endPosition = startPosition + helper.secondExpressionLength(expression);
addProblem(expression, startPosition, endPosition, helper.secondExpressionInvalidKey());
}
else {
expression.getSecondExpression().accept(this);
}
}
// Missing second comma
if (helper.hasSecondExpression(expression) &&
!expression.hasSecondComma() &&
helper.hasThirdExpression(expression)) {
int startPosition = position(expression) +
identifier.length() +
1 /* ( */ +
helper.firstExpressionLength(expression) +
(expression.hasFirstComma() ? 1 : 0) +
(expression.hasSpaceAfterFirstComma() ? 1 : 0) +
helper.secondExpressionLength(expression);
addProblem(expression, startPosition, helper.secondCommaMissingKey());
}
// Validate third expression
if (expression.hasSecondComma()) {
// Missing third expression
if (!helper.hasThirdExpression(expression)) {
int startPosition = position(expression) +
identifier.length() +
1 /* ( */ +
helper.firstExpressionLength(expression) +
(expression.hasFirstComma() ? 1 : 0) +
(expression.hasSpaceAfterFirstComma() ? 1 : 0) +
helper.secondExpressionLength(expression) +
(expression.hasSecondComma() ? 1 : 0) +
(expression.hasSpaceAfterSecondComma() ? 1 : 0);
addProblem(expression, startPosition, helper.thirdExpressionMissingKey());
}
// Invalid third expression
else if (!helper.isThirdExpressionValid(expression)) {
int startPosition = position(expression) +
identifier.length() +
1 /* ( */ +
helper.firstExpressionLength(expression) +
(expression.hasFirstComma() ? 1 : 0) +
(expression.hasSpaceAfterFirstComma() ? 1 : 0) +
helper.secondExpressionLength(expression) +
(expression.hasSecondComma() ? 1 : 0) +
(expression.hasSpaceAfterSecondComma() ? 1 : 0);
int endPosition = startPosition + helper.thirdExpressionLength(expression);
addProblem(expression, startPosition, endPosition, helper.thirdExpressionInvalidKey());
}
else {
expression.getThirdExpression().accept(this);
}
}
}
// Missing ')'
if (!helper.hasRightParenthesis(expression)) {
int startPosition = position(expression) +
identifier.length() +
1 /* ( */ +
helper.firstExpressionLength(expression) +
(expression.hasFirstComma() ? 1 : 0) +
(expression.hasSpaceAfterFirstComma() ? 1 : 0) +
helper.secondExpressionLength(expression) +
(expression.hasSecondComma() ? 1 : 0) +
(expression.hasSpaceAfterSecondComma() ? 1 : 0) +
helper.thirdExpressionLength(expression);
addProblem(expression, startPosition, helper.rightParenthesisMissingKey(expression));
}
}
protected <T extends AggregateFunction> void validateAggregateFunctionLocation
(T expression, AbstractSingleEncapsulatedExpressionHelper<T> helper) {
// Check to see if the aggregate function is in the right clause
OwningClauseVisitor visitor = getOwningClauseVisitor();
boolean valid = true;
try {
expression.accept(visitor);
valid = visitor.selectClause != null ||
visitor.simpleSelectClause != null ||
visitor.groupByClause != null ||
visitor.orderByClause != null ||
visitor.havingClause != null;
}
finally {
visitor.dispose();
}
// The function is used in an invalid clause
if (!valid) {
int startPosition = position(expression);
int endPosition = startPosition + length(expression);
addProblem(
expression,
startPosition,
endPosition,
AggregateFunction_WrongClause,
expression.getIdentifier());
}
else {
validateAbstractSingleEncapsulatedExpression(expression, helper);
}
}
protected void validateArithmeticExpression(ArithmeticExpression expression) {
validateCompoundExpression(
expression,
expression.getArithmeticSign(),
ArithmeticExpression_MissingLeftExpression,
ArithmeticExpression_InvalidLeftExpression,
ArithmeticExpression_MissingRightExpression,
ArithmeticExpression_InvalidRightExpression,
ArithmeticExpressionBNF.ID,
ArithmeticTermBNF.ID
);
}
/**
* Validates the given {@link Expression} by making sure each child is separated by a comma.
*
* @param expression The {@link Expression} to validate its children, which should be a series
* of {@link Expression} separated by a comma
* @param endsWithCommaProblemKey The problem key describing the {@link CollectionExpression} is
* ending with a comma
* @param missingCommaProblemKey The problem key describing the {@link CollectionExpression} has
* two items not separated by a comma
*/
protected void validateCollectionSeparatedByComma(Expression expression,
String endsWithCommaProblemKey,
String missingCommaProblemKey) {
CollectionSeparatedByCommaValidator validator = collectionSeparatedByCommaValidator();
try {
validator.endsWithCommaProblemKey = endsWithCommaProblemKey;
validator.wrongSeparatorProblemKey = missingCommaProblemKey;
expression.accept(validator);
}
finally {
validator.endsWithCommaProblemKey = null;
validator.wrongSeparatorProblemKey = null;
}
}
/**
* Validates the given {@link Expression} by making sure each child is separated by a whitespace.
*
* @param expression The {@link Expression} to validate its children, which should be a series
* of {@link Expression} separated by a whitespace
* @param endsWithCommaProblemKey The problem key describing the {@link CollectionExpression}
* is ending with a comma
* @param hasCommaProblemKey The problem key describing the {@link CollectionExpression} has two
* items separated by a comma
*/
protected void validateCollectionSeparatedBySpace(Expression expression,
String endsWithCommaProblemKey,
String hasCommaProblemKey) {
CollectionSeparatedBySpaceValidator validator = collectionSeparatedBySpaceValidator();
try {
validator.endsWithCommaProblemKey = endsWithCommaProblemKey;
validator.wrongSeparatorProblemKey = hasCommaProblemKey;
expression.accept(validator);
}
finally {
validator.endsWithCommaProblemKey = null;
validator.wrongSeparatorProblemKey = null;
}
}
protected void validateCompoundExpression(CompoundExpression expression,
String identifier,
String missingLeftExpression,
String invalidLeftExpression,
String missingRightExpression,
String invalidRightExpression,
String leftExpressionQueryBNF,
String rightExpressionQueryBNF) {
// Missing left expression
if (!expression.hasLeftExpression()) {
int startPosition = position(expression);
addProblem(expression, startPosition, missingLeftExpression);
}
else {
Expression leftExpression = expression.getLeftExpression();
// Invalid left expression
if (!isValid(leftExpression, leftExpressionQueryBNF)) {
int startPosition = position(expression);
int endPosition = startPosition + length(leftExpression);
addProblem(expression, startPosition, endPosition, invalidLeftExpression);
}
else {
leftExpression.accept(this);
}
}
// Missing right expression
if (!expression.hasRightExpression()) {
int startPosition = position(expression) +
length(expression.getLeftExpression()) +
(expression.hasLeftExpression() ? 1 : 0) +
identifier.length() +
(expression.hasSpaceAfterIdentifier() ? 1 : 0);
addProblem(expression, startPosition, missingRightExpression);
}
else {
Expression rightExpression = expression.getRightExpression();
// Invalid right expression
if (!isValid(rightExpression, rightExpressionQueryBNF)) {
int startPosition = position(expression) +
length(expression.getLeftExpression()) +
(expression.hasLeftExpression() ? 1 : 0) +
identifier.length() +
(expression.hasSpaceAfterIdentifier() ? 1 : 0);
int endPosition = startPosition + length(rightExpression);
addProblem(expression, startPosition, endPosition, invalidRightExpression);
}
else {
rightExpression.accept(this);
}
}
}
protected void validateIdentificationVariableDeclaration(IdentificationVariableDeclaration expression) {
// The range variable declaration is missing
if (!expression.hasRangeVariableDeclaration()) {
addProblem(expression, position(expression), IdentificationVariableDeclaration_MissingRangeVariableDeclaration);
}
else {
expression.getRangeVariableDeclaration().accept(this);
}
validateJoins(expression);
}
/**
* Validates the given variable name to make sure:
* <ul>
* <li>It is not a JPQL reserved identifier;</li>
* <li>It is a valid Java identifier.</li>
* </ul>
*
* @param expression The expression to validate
* @param variableName The text to actually validate
* @param variableLength The actual length of the text, which can be longer than the text that is
* validated
* @param reservedWordProblemKey The problem key used when the variable name is a reserved JPQL
* identifier
* @param invalidJavaIdentifierProblemKey The problem key used when the variable name is not a
* valid Java identifier
*/
protected void validateIdentifier(Expression expression,
String variableName,
int variableLength,
String reservedWordProblemKey,
String invalidJavaIdentifierProblemKey) {
// Must not be a reserved identifier
if (getExpressionRegistry().isIdentifier(variableName)) {
int startPosition = position(expression);
int endPosition = startPosition + variableLength;
addProblem(expression, startPosition, endPosition, reservedWordProblemKey, variableName);
}
// The character sequence must begin with a Java identifier start character, and all other
// characters must be Java identifier part characters. An identifier start character is any
// character for which the method Character.isJavaIdentifierStart returns true. This includes
// the underscore (_) character and the dollar sign ($) character. An identifier part
// character is any character for which the method Character.isJavaIdentifierPart returns
// true. The question mark (?) character is reserved for use by the Java Persistence query
// language. An identification variable must not be a reserved identifier or have the same
// name as any entity in the same persistence unit
else if (!isValidJavaIdentifier(variableName)) {
int startPosition = position(expression);
int endPosition = startPosition + variableLength;
addProblem(expression, startPosition, endPosition, invalidJavaIdentifierProblemKey, variableName);
}
}
protected void validateInputParameters(JPQLExpression expression) {
int positionalCount = 0;
int namedCount = 0;
for (InputParameter inputParameter : inputParameters) {
if (inputParameter.isNamed()) {
namedCount++;
}
else if (inputParameter.isPositional()) {
positionalCount++;
}
}
if ((positionalCount > 0) && (namedCount > 0)) {
for (InputParameter parameter : inputParameters) {
addProblem(parameter, InputParameter_Mixture);
}
}
}
protected void validateJoins(IdentificationVariableDeclaration expression) {
// Validate the JOIN expressions
if (expression.hasJoins()) {
Expression joins = expression.getJoins();
List<Expression> children = getChildren(joins);
// Validate multiple JOIN expression
if (children.size() > 1) {
validateCollectionSeparatedBySpace(
joins,
IdentificationVariableDeclaration_JoinsEndWithComma,
IdentificationVariableDeclaration_JoinsHaveComma
);
// Make sure each child is a JOIN expression
for (int index = children.size(); --index >= 0; ) {
Expression child = children.get(index);
// The child expression is not a JOIN expression
if (!isValid(child, JoinBNF.ID)) {
addProblem(child, IdentificationVariableDeclaration_InvalidJoin, child.toActualText());
}
// Validate the JOIN expression
else {
child.accept(this);
}
}
}
// Make sure the single expression is a JOIN expression
else if (!isValid(joins, JoinBNF.ID)) {
addProblem(joins, IdentificationVariableDeclaration_InvalidJoin, joins.toActualText());
}
// Validate the JOIN expression
else {
joins.accept(this);
}
}
}
protected void validateLikeExpressionEscapeCharacter(LikeExpression expression) {
Expression escapeCharacter = expression.getEscapeCharacter();
// Check for a string literal (single quoted character)
String character = literal(escapeCharacter, LiteralType.STRING_LITERAL);
// Check for a single character
if ((character.length() > 0) && ExpressionTools.isQuote(character.charAt(0))) {
// Unquote the literal first
character = ExpressionTools.unquote(character);
// The escape character is not a single character literal
if (character.length() != 1) {
int startPosition = position(expression) +
length(expression.getStringExpression()) +
(expression.hasSpaceAfterStringExpression() ? 1 : 0) +
(expression.hasNot() ? 4 : 0) +
4 /* LIKE */ +
(expression.hasSpaceAfterLike() ? 1 : 0) +
length(expression.getPatternValue()) +
(expression.hasSpaceAfterPatternValue() ? 1 : 0) +
6 + /* ESCAPE */ +
(expression.hasSpaceAfterEscape() ? 1 : 0);
int endPosition = startPosition + length(escapeCharacter);
addProblem(
expression,
startPosition,
endPosition,
LikeExpression_InvalidEscapeCharacter,
escapeCharacter.toActualText()
);
}
}
else {
// Check for an input parameter
character = literal(escapeCharacter, LiteralType.INPUT_PARAMETER);
if ((character.length() == 0) &&
!isValid(escapeCharacter, LikeExpressionEscapeCharacterBNF.ID)) {
int startPosition = position(expression) +
length(expression.getStringExpression()) +
4 /* LIKE */ +
(expression.hasSpaceAfterStringExpression() ? 1 : 0) +
(expression.hasNot() ? 1 : 0) +
(expression.hasSpaceAfterLike() ? 1 : 0) +
length(expression.getPatternValue()) +
(expression.hasSpaceAfterPatternValue() ? 1 : 0) +
6 + /* ESCAPE */ +
(expression.hasSpaceAfterEscape() ? 1 : 0);
int endPosition = startPosition + length(escapeCharacter);
addProblem(
expression,
startPosition,
endPosition,
LikeExpression_InvalidEscapeCharacter,
escapeCharacter.toActualText()
);
}
}
}
protected void validateLogicalExpression(LogicalExpression expression,
String leftExpressionQueryBNF,
String rightExpressionQueryBNF) {
validateCompoundExpression(
expression,
expression.getIdentifier(),
LogicalExpression_MissingLeftExpression,
LogicalExpression_InvalidLeftExpression,
LogicalExpression_MissingRightExpression,
LogicalExpression_InvalidRightExpression,
leftExpressionQueryBNF,
rightExpressionQueryBNF
);
}
protected void validateOwningClause(InputParameter expression, String parameter) {
if (!isInputParameterInValidLocation(expression)) {
int startPosition = position(expression);
int endPosition = startPosition + parameter.length();
addProblem(expression, startPosition, endPosition, InputParameter_WrongClauseDeclaration);
}
}
protected void validatePathExpression(AbstractPathExpression expression) {
// Missing identification variable
if (!expression.hasIdentificationVariable() &&
!expression.hasVirtualIdentificationVariable()) {
addProblem(expression, AbstractPathExpression_MissingIdentificationVariable);
}
// Validate the identification variable
else {
expression.getIdentificationVariable().accept(this);
}
// Cannot end with a dot
if (expression.endsWithDot()) {
addProblem(expression, AbstractPathExpression_CannotEndWithComma);
}
}
protected void validateSimpleSelectStatement(SimpleSelectStatement expression) {
validateAbstractSelectStatement(expression);
}
protected AbstractSingleEncapsulatedExpressionHelper<ValueExpression> valueExpressionHelper() {
AbstractSingleEncapsulatedExpressionHelper<ValueExpression> helper = getHelper(VALUE);
if (helper == null) {
helper = buildValueExpressionHelper();
registerHelper(VALUE, helper);
}
return helper;
}
/**
* {@inheritDoc}
*/
@Override
public void visit(AbsExpression expression) {
validateAbstractSingleEncapsulatedExpression(expression, absExpressionHelper());
}
/**
* {@inheritDoc}
*/
@Override
public void visit(AbstractSchemaName expression) {
// Nothing to validate
super.visit(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(AdditionExpression expression) {
validateArithmeticExpression(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(AllOrAnyExpression expression) {
validateAbstractSingleEncapsulatedExpression(expression, allOrAnyExpressionHelper());
// Make sure the expression is part of a comparison expression
if (!isChildOfComparisonExpession(expression)) {
addProblem(expression, AllOrAnyExpression_NotPartOfComparisonExpression);
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(AndExpression expression) {
validateLogicalExpression(expression, ConditionalExpressionBNF.ID, ConditionalExpressionBNF.ID);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(ArithmeticFactor expression) {
// Missing expression after +/-
if (!expression.hasExpression()) {
int startPosition = position(expression) + 1;
addProblem(expression, startPosition, ArithmeticFactor_MissingExpression);
}
else {
Expression arithmeticExpression = expression.getExpression();
if (!isValid(arithmeticExpression, ArithmeticPrimaryBNF.ID)) {
int startIndex = position(expression) + 1;
int endIndex = startIndex;
addProblem(expression, startIndex, endIndex, ArithmeticFactor_InvalidExpression);
}
else {
arithmeticExpression.accept(this);
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(AvgFunction expression) {
validateAggregateFunctionLocation(expression, avgFunctionHelper());
}
/**
* {@inheritDoc}
*/
@Override
public void visit(BadExpression expression) {
int startPosition = position(expression);
int endPosition = startPosition + length(expression);
addProblem(expression, startPosition, endPosition, BadExpression_InvalidExpression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(BetweenExpression expression) {
// Missing expression
if (!expression.hasExpression()) {
int startPosition = position(expression);
addProblem(expression, startPosition, BetweenExpression_MissingExpression);
}
// Missing lower bound expression
if (!expression.hasLowerBoundExpression()) {
int startPosition = position(expression) +
length(expression.getExpression()) +
(expression.hasExpression() ? 1 : 0) +
(expression.hasNot() ? 11 /* NOT BETWEEN */ : 7 /* BETWEEN */) +
(expression.hasSpaceAfterBetween() ? 1 : 0);
addProblem(expression, startPosition, BetweenExpression_MissingLowerBoundExpression);
}
// Missing 'AND'
else if (!expression.hasAnd()) {
int startPosition = position(expression) +
length(expression.getExpression()) +
(expression.hasExpression() ? 1 : 0) +
(expression.hasNot() ? 11 /* NOT BETWEEN */ : 7 /* BETWEEN */) +
(expression.hasSpaceAfterBetween() ? 1 : 0) +
length(expression.getLowerBoundExpression()) +
(expression.hasSpaceAfterLowerBound() ? 1 : 0);
addProblem(expression, startPosition, BetweenExpression_MissingAnd);
}
// Missing upper bound expression
else if (!expression.hasUpperBoundExpression()) {
int startPosition = position(expression) +
length(expression.getExpression()) +
(expression.hasExpression() ? 1 : 0) +
(expression.hasNot() ? 11 /* NOT BETWEEN */ : 7 /* BETWEEN */) +
(expression.hasSpaceAfterBetween() ? 1 : 0) +
length(expression.getLowerBoundExpression()) +
(expression.hasSpaceAfterLowerBound() ? 1 : 0) +
3 /* AND */ +
(expression.hasSpaceAfterAnd() ? 1 : 0);
addProblem(expression, startPosition, BetweenExpression_MissingUpperBoundExpression);
}
super.visit(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(CaseExpression expression) {
// JPA 1.0 does not support a CASE expression
if (isJPA1_0()) {
addProblem(expression, CaseExpression_InvalidJPAVersion);
}
else {
// WHEN clauses can't be separated by commas
if (expression.hasWhenClauses()) {
validateCollectionSeparatedBySpace(
expression.getWhenClauses(),
CaseExpression_WhenClausesEndWithComma,
CaseExpression_WhenClausesHasComma
);
}
// At least one WHEN clause must be specified
else {
int startPosition = position(expression) +
4 /* CASE */ +
(expression.hasSpaceAfterCase() ? 1 : 0) +
length(expression.getCaseOperand()) +
(expression.hasSpaceAfterCaseOperand() ? 1 : 0);
addProblem(expression, startPosition, CaseExpression_MissingWhenClause);
}
// Missing ELSE
if (expression.hasWhenClauses() &&
!expression.hasElse()) {
int startPosition = position(expression) +
4 /* CASE */ +
(expression.hasSpaceAfterCase() ? 1 : 0) +
length(expression.getCaseOperand()) +
(expression.hasSpaceAfterCaseOperand() ? 1 : 0) +
length(expression.getWhenClauses()) +
(expression.hasSpaceAfterWhenClauses() ? 1 : 0);
addProblem(expression, startPosition, CaseExpression_MissingElseIdentifier);
}
// Missing ELSE expression
else if (expression.hasElse() &&
!expression.hasElseExpression()) {
int startPosition = position(expression) +
4 /* CASE */ +
(expression.hasSpaceAfterCase() ? 1 : 0) +
length(expression.getCaseOperand()) +
(expression.hasSpaceAfterCaseOperand() ? 1 : 0) +
length(expression.getWhenClauses()) +
(expression.hasSpaceAfterWhenClauses() ? 1 : 0) +
4 /* ELSE */ +
(expression.hasSpaceAfterElse() ? 1 : 0);
addProblem(expression, startPosition, CaseExpression_MissingElseExpression);
}
// Missing END
else if (expression.hasElseExpression() &&
!expression.hasEnd()) {
int startPosition = position(expression) +
4 /* CASE */ +
(expression.hasSpaceAfterCase() ? 1 : 0) +
length(expression.getCaseOperand()) +
(expression.hasSpaceAfterCaseOperand() ? 1 : 0) +
length(expression.getWhenClauses()) +
(expression.hasSpaceAfterWhenClauses() ? 1 : 0) +
4 /* ELSE */ +
(expression.hasSpaceAfterElse() ? 1 : 0) +
length(expression.getElseExpression()) +
(expression.hasSpaceAfterElseExpression() ? 1 : 0);
addProblem(expression, startPosition, CaseExpression_MissingEndIdentifier);
}
super.visit(expression);
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(CoalesceExpression expression) {
// JPA 1.0 does not support a COALESCE expression
if (isJPA1_0()) {
addProblem(expression, CoalesceExpression_InvalidJPAVersion);
}
else {
validateAbstractSingleEncapsulatedExpression(expression, coalesceExpressionHelper());
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(CollectionExpression expression) {
// Nothing to validate, it's done by the parent expression
// but we want to validate its children
super.visit(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(CollectionMemberDeclaration expression) {
// FROM => 'IN (x) AS y'
if (isOwnedByFromClause(expression)) {
// Missing '('
if (!expression.hasLeftParenthesis()) {
int startPosition = position(expression) + 2 /* IN */;
addProblem(expression, startPosition, CollectionMemberDeclaration_MissingLeftParenthesis);
}
// Missing collection valued path expression
else if (!expression.hasCollectionValuedPathExpression()) {
int startPosition = position(expression) + 3 /* IN( */;
addProblem(expression, startPosition, CollectionMemberDeclaration_MissingCollectionValuedPathExpression);
}
// Missing right parenthesis
else if (!expression.hasRightParenthesis()) {
int startPosition = position(expression) +
2 /* IN */ +
(expression.hasLeftParenthesis() ? 1 : 0) +
(expression.hasSpaceAfterIn() ? 1 : 0) +
length(expression.getCollectionValuedPathExpression());
addProblem(expression, startPosition, CollectionMemberDeclaration_MissingRightParenthesis);
}
// Missing identification variable
if (expression.hasRightParenthesis() &&
!expression.hasIdentificationVariable()) {
int startPosition = position(expression) +
2 /* IN */ +
(expression.hasLeftParenthesis() ? 1 : 0) +
(expression.hasSpaceAfterIn() ? 1 : 0) +
length(expression.getCollectionValuedPathExpression()) +
1 /* ')' */ +
(expression.hasSpaceAfterRightParenthesis() ? 1 : 0) +
(expression.hasAs() ? 2 : 0) +
(expression.hasSpaceAfterAs() ? 1 : 0);
addProblem(expression, startPosition, CollectionMemberDeclaration_MissingIdentificationVariable);
}
}
// Subquery FROM => 'IN (x) AS y' or 'IN x'
else {
// Missing '('
if (!expression.hasLeftParenthesis() &&
expression.hasRightParenthesis()) {
int startPosition = position(expression) + 2; // IN
addProblem(expression, startPosition, CollectionMemberDeclaration_MissingLeftParenthesis);
}
// Missing collection valued path expression
else if (!expression.hasCollectionValuedPathExpression()) {
int startPosition = position(expression) +
2 /* IN */ +
(expression.hasSpaceAfterIn() ? 1 : 0);
addProblem(expression, startPosition, CollectionMemberDeclaration_MissingCollectionValuedPathExpression);
}
// Missing right parenthesis
else if (expression.hasLeftParenthesis() &&
!expression.hasRightParenthesis()) {
int startPosition = position(expression) +
2 /* IN */ +
(expression.hasLeftParenthesis() ? 1 : 0) +
(expression.hasSpaceAfterIn() ? 1 : 0) +
length(expression.getCollectionValuedPathExpression());
addProblem(expression, startPosition, CollectionMemberDeclaration_MissingRightParenthesis);
}
// Missing identification variable
if (expression.hasRightParenthesis() &&
!expression.hasIdentificationVariable()) {
int startPosition = position(expression) +
2 /* IN */ +
(expression.hasLeftParenthesis() ? 1 : 0) +
(expression.hasSpaceAfterIn() ? 1 : 0) +
length(expression.getCollectionValuedPathExpression()) +
1 /* ')' */ +
(expression.hasSpaceAfterRightParenthesis() ? 1 : 0) +
(expression.hasAs() ? 2 : 0) +
(expression.hasSpaceAfterAs() ? 1 : 0);
addProblem(expression, startPosition, CollectionMemberDeclaration_MissingIdentificationVariable);
}
}
super.visit(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(CollectionMemberExpression expression) {
// Missing entity expression
if (!expression.hasEntityExpression()) {
int startPosition = position(expression);
addProblem(expression, startPosition, CollectionMemberExpression_MissingEntityExpression);
}
// Missing collection valued path expression
if (!expression.hasCollectionValuedPathExpression()) {
int startPosition = position(expression) +
length(expression.getEntityExpression()) +
(expression.hasEntityExpression() ? 1 : 0) +
(expression.hasNot() ? 4 /* NOT + whitespace */ : 0) +
6 /* MEMBER */ +
(expression.hasSpaceAfterMember() ? 1 : 0) +
(expression.hasOf() ? 2 : 0) +
(expression.hasSpaceAfterOf() ? 1 : 0);
addProblem(expression, startPosition, CollectionMemberExpression_MissingCollectionValuedPathExpression);
}
else {
Expression pathExpression = expression.getCollectionValuedPathExpression();
// The expression is not a path expression
if (!isValid(pathExpression, CollectionValuedPathExpressionBNF.ID)) {
int startPosition = position(expression) +
length(expression.getEntityExpression()) +
(expression.hasEntityExpression() ? 1 : 0) +
(expression.hasNot() ? 4 /* NOT + whitespace */ : 0) +
6 /* MEMBER */ +
(expression.hasSpaceAfterMember() ? 1 : 0) +
(expression.hasOf() ? 2 : 0) +
(expression.hasSpaceAfterOf() ? 1 : 0);
int endPosition = startPosition + length(pathExpression);
addProblem(
expression,
startPosition,
endPosition,
CollectionValuedPathExpression_NotCollectionType,
expression.toParsedText()
);
}
}
super.visit(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(CollectionValuedPathExpression expression) {
validatePathExpression(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(ComparisonExpression expression) {
// Missing left expression
if (!expression.hasLeftExpression()) {
int startPosition = position(expression);
addProblem(expression, startPosition, ComparisonExpression_MissingLeftExpression);
}
// Missing right expression
if (!expression.hasRightExpression()) {
int startPosition = position(expression) +
(expression.hasLeftExpression() ? 1 : 0) +
length(expression.getLeftExpression()) +
expression.getComparisonOperator().length() +
(expression.hasSpaceAfterIdentifier() ? 1 : 0);
addProblem(expression, startPosition, ComparisonExpression_MissingRightExpression);
}
super.visit(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(ConcatExpression expression) {
validateAbstractSingleEncapsulatedExpression(expression, concatExpressionHelper());
if (expression.hasLeftParenthesis() &&
expression.hasExpression()) {
CollectionExpression collectionExpression = getCollectionExpression(expression.getExpression());
// Single element
if (collectionExpression == null) {
addProblem(expression, ConcatExpression_MissingExpression);
}
else {
for (Expression child : collectionExpression.children()) {
if (!isValid(child, expression.encapsulatedExpressionBNF())) {
addProblem(child, ConcatExpression_InvalidExpression, child.toParsedText());
}
}
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(ConstructorExpression expression) {
String className = expression.getClassName();
// Missing constructor name
if (className.length() == 0) {
int startPosition = position(expression) +
3 /* NEW */ +
(expression.hasSpaceAfterNew() ? 1 : 0);
addProblem(expression, startPosition, ConstructorExpression_MissingConstructorName);
}
// Missing '('
else if (!expression.hasLeftParenthesis()) {
int startPosition = position(expression) +
3 /* NEW */ +
(expression.hasSpaceAfterNew() ? 1 : 0) +
className.length();
addProblem(expression, startPosition, ConstructorExpression_MissingLeftParenthesis);
}
else {
// Missing constructor items
if (!expression.hasConstructorItems()) {
int startPosition = position(expression) +
3 /* NEW */ +
(expression.hasSpaceAfterNew() ? 1 : 0) +
className.length() +
1 /* '(' */;
addProblem(expression, startPosition, ConstructorExpression_MissingConstructorItem);
}
else {
// Validate the constructor items
validateCollectionSeparatedByComma(
expression.getConstructorItems(),
ConstructorExpression_ConstructorItemEndsWithComma,
ConstructorExpression_ConstructorItemIsMissingComma
);
// Missing ')'
if (expression.hasLeftParenthesis() &&
expression.hasConstructorItems() &&
!expression.hasRightParenthesis()) {
int startPosition = position(expression) +
3 /* NEW */ +
(expression.hasSpaceAfterNew() ? 1 : 0) +
className.length() +
1 /* '(' */ +
length(expression.getConstructorItems());
addProblem(expression, startPosition, ConstructorExpression_MissingRightParenthesis);
}
}
super.visit(expression);
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(CountFunction expression) {
validateAggregateFunctionLocation(expression, countFunctionHelper());
}
/**
* {@inheritDoc}
*/
@Override
public void visit(DateTime expression) {
String dateTime = expression.getText();
// The JDBC escape syntax
if (dateTime.startsWith("{")) {
int length = dateTime.length();
// Missing opening
if (!dateTime.startsWith("{d ") &&
!dateTime.startsWith("{t ") &&
!dateTime.startsWith("{ts ")) {
int startPosition = position(expression) + 1;
int endPosition = startPosition;
for (int index = 1; index < length; index++) {
if (Character.isWhitespace(dateTime.charAt(index))) {
break;
}
endPosition++;
}
addProblem(expression, startPosition, endPosition, DateTime_JDBCEscapeFormat_InvalidSpecification);
}
// Missing open quote
else if (!dateTime.startsWith("{d '") &&
!dateTime.startsWith("{t '") &&
!dateTime.startsWith("{ts '")) {
int startPosition = position(expression) + 1;
for (int index = 1; index < length; index++) {
startPosition++;
if (Character.isWhitespace(dateTime.charAt(index))) {
break;
}
}
addProblem(expression, startPosition, DateTime_JDBCEscapeFormat_MissingOpenQuote);
}
// Missing closing '
if ((length > 1) && (dateTime.charAt(length - (dateTime.endsWith("}") ? 2 : 1)) != '\'')) {
int startPosition = position(expression) + length;
if (dateTime.endsWith("}")) {
startPosition--;
}
addProblem(expression, startPosition, DateTime_JDBCEscapeFormat_MissingCloseQuote);
}
// Missing closing }
else if (!dateTime.endsWith("}")) {
int startPosition = position(expression) +length;
addProblem(expression, startPosition, DateTime_JDBCEscapeFormat_MissingRightCurlyBrace);
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(DeleteClause expression) {
// Missing FROM
if (!expression.hasFrom()) {
int startPosition = 6 /* DELETE */ +
(expression.hasSpaceAfterDelete() ? 1 : 0);
addProblem(expression, startPosition, DeleteClause_FromMissing);
}
// Missing range variable declaration
else if (!expression.hasRangeVariableDeclaration()) {
// The whitespace is added to the position regardless if it was parsed or not
int startPosition = 12 /* DELETE FROM + whitespace) */;
addProblem(expression, startPosition, DeleteClause_RangeVariableDeclarationMissing);
}
// Validate range variable declaration
if (expression.hasRangeVariableDeclaration()) {
// More than one entity abstract schema type is declared
CollectionExpression collectionExpression = getCollectionExpression(expression.getRangeVariableDeclaration());
if (collectionExpression != null) {
Expression firstChild = collectionExpression.getChild(0);
int startPosition = position(firstChild) + length(firstChild);
int endPosition = position(collectionExpression) + length(collectionExpression);
boolean malformed = false;
for (int index = collectionExpression.childrenSize() - 1; --index >= 0; ) {
if (!collectionExpression.hasComma(index)) {
malformed = true;
}
}
if (collectionExpression.toActualText().endsWith(" ")) {
endPosition--;
}
addProblem(
expression,
startPosition,
endPosition,
malformed ? DeleteClause_RangeVariableDeclarationMalformed :
DeleteClause_MultipleRangeVariableDeclaration
);
}
else {
super.visit(expression);
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(DeleteStatement expression) {
// Nothing to validate, done directly by DeleteClause and WhereClause
super.visit(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(DivisionExpression expression) {
validateArithmeticExpression(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(EmptyCollectionComparisonExpression expression) {
// Missing collection valued path expression
if (!expression.hasExpression()) {
int startPosition = position(expression);
addProblem(expression, startPosition, EmptyCollectionComparisonExpression_MissingExpression);
}
else {
Expression pathExpression = expression.getExpression();
// The expression is not a path expression
if (!isValid(pathExpression, CollectionValuedPathExpressionBNF.ID)) {
int startPosition = position(expression);
int endPosition = startPosition + length(pathExpression);
addProblem(
expression,
startPosition,
endPosition,
CollectionValuedPathExpression_NotCollectionType,
expression.toParsedText()
);
}
else {
super.visit(expression);
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(EntityTypeLiteral expression) {
if (isJPA1_0()) {
addProblem(expression, EntityTypeLiteral_InvalidJPAVersion);
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(EntryExpression expression) {
// JPA 1.0 does not support an ENTRY expression
if (isJPA1_0()) {
addProblem(expression, EntryExpression_InvalidJPAVersion);
}
else {
validateAbstractSingleEncapsulatedExpression(expression, entryExpressionHelper());
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(ExistsExpression expression) {
validateAbstractSingleEncapsulatedExpression(expression, existsExpressionHelper());
}
/**
* {@inheritDoc}
*/
@Override
public void visit(FromClause expression) {
validateAbstractFromClause(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(FunctionExpression expression) {
JPQLQueryBNF queryBNF = getQueryBNF(expression.getQueryBNF().getId());
boolean validFunction = (queryBNF != null) && queryBNF.hasIdentifier(expression.getIdentifier());
// JPA 1.0/2.0 does not support the function expression
if (!isJPA2_1() || !validFunction) {
addProblem(expression, FunctionExpression_InvalidJPAVersion);
}
else {
validateAbstractSingleEncapsulatedExpression(expression, functionExpressionHelper());
// Missing function name
if (expression.hasLeftParenthesis()) {
String functionName = expression.getUnquotedFunctionName();
if (ExpressionTools.stringIsEmpty(functionName)) {
int startPosition = position(expression) +
expression.getIdentifier().length() +
(expression.hasLeftParenthesis() ? 1 : 0);
addProblem(expression, startPosition, FunctionExpression_MissingFunctionName);
}
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(GroupByClause expression) {
// Missing grouping items
if (!expression.hasGroupByItems()) {
int startPosition = position(expression) +
8 /* GROUP BY */ +
(expression.hasSpaceAfterGroupBy() ? 1 : 0);
addProblem(expression, startPosition, GroupByClause_GroupByItemMissing);
}
// Validate the separation of multiple ordering items
else {
validateCollectionSeparatedByComma(
expression.getGroupByItems(),
GroupByClause_GroupByItemEndsWithComma,
GroupByClause_GroupByItemIsMissingComma
);
super.visit(expression);
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(HavingClause expression) {
validateAbstractConditionalClause(
expression,
HavingClause_MissingConditionalExpression,
HavingClause_InvalidConditionalExpression
);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(IdentificationVariable expression) {
if (!expression.isVirtual()) {
String variable = expression.getText();
validateIdentifier(
expression,
variable,
variable.length(),
IdentificationVariable_Invalid_ReservedWord,
IdentificationVariable_Invalid_JavaIdentifier
);
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(IdentificationVariableDeclaration expression) {
validateIdentificationVariableDeclaration(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(IndexExpression expression) {
// JPA 1.0 does not support an INDEX expression
if (isJPA1_0()) {
addProblem(expression, IndexExpression_InvalidJPAVersion);
}
else {
validateAbstractSingleEncapsulatedExpression(expression, indexExpressionHelper());
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(InExpression expression) {
// Missing expression
if (!expression.hasExpression()) {
int startPosition = position(expression);
addProblem(expression, startPosition, InExpression_MissingExpression);
}
else {
Expression pathExpression = expression.getExpression();
if (!isValid(pathExpression, expression.getExpressionExpressionBNF())) {
int startPosition = position(expression);
int endPosition = startPosition + length(pathExpression);
addProblem(expression, startPosition, endPosition, InExpression_InvalidExpression);
}
}
// Check for "IN :input_parameter" defined in JPA 2.0
boolean singleInputParameter = isNewerThanOrEqual(JPAVersion.VERSION_2_0) &&
expression.isSingleInputParameter();
// Missing '('
if (!expression.hasLeftParenthesis() && !singleInputParameter) {
int startPosition = position(expression) +
length(expression.getExpression()) +
(expression.hasExpression() ? 1 : 0) +
(expression.hasNot() ? 4 /* NOT + whitespace */ : 0) +
2 /* IN */;
addProblem(expression, startPosition, InExpression_MissingLeftParenthesis);
}
// There must be at least one element in the comma separated list that
// defines the set of values for the IN expression.
else if (!expression.hasInItems()) {
int startPosition = position(expression) +
length(expression.getExpression()) +
(expression.hasExpression() ? 1 : 0) +
(expression.hasNot() ? 4 /* NOT + whitespace */ : 0) +
2 /* IN */ +
(expression.hasSpaceAfterIn() ? 1 : 0) +
(expression.hasLeftParenthesis() ? 1 : 0);
addProblem(expression, startPosition, InExpression_MissingInItems);
}
// Make sure the IN items are separated by commas
else if (!singleInputParameter) {
validateCollectionSeparatedByComma(
expression.getInItems(),
InExpression_InItemEndsWithComma,
InExpression_InItemIsMissingComma
);
}
// Missing ')'
if (!singleInputParameter &&
expression.hasInItems() &&
!expression.hasRightParenthesis()) {
int startPosition = position(expression) +
length(expression.getExpression()) +
(expression.hasExpression() ? 1 : 0) +
(expression.hasNot() ? 4 /* NOT + whitespace */ : 0) +
2 /* IN */ +
(expression.hasSpaceAfterIn() ? 1 : 0) +
(expression.hasLeftParenthesis() ? 1 : 0) +
length(expression.getInItems());
addProblem(expression, startPosition, InExpression_MissingRightParenthesis);
}
super.visit(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(InputParameter expression) {
inputParameters.add(expression);
String parameter = expression.getParameter();
// No parameter specified
if (parameter.length() == 1) {
int startPosition = position(expression);
addProblem(expression, startPosition, startPosition + 1, InputParameter_MissingParameter);
}
// Named parameter: It follows the rules for identifiers defined in Section 4.4.1 of the spec
else if (expression.isNamed()) {
if (!isValidJavaIdentifier(parameter.substring(1))) {
int startPosition = position(expression);
int endPosition = startPosition + parameter.length();
addProblem(expression, startPosition, endPosition, InputParameter_JavaIdentifier);
}
}
// Positional parameter: Designated by the question mark (?) prefix followed by an integer
else {
boolean valid = true;
for (int index = parameter.length(); --index > 0; ) /* Skip ? */ {
char character = parameter.charAt(index);
if (!Character.isDigit(character)) {
int startPosition = position(expression);
int endPosition = startPosition + parameter.length();
addProblem(expression, startPosition, endPosition, InputParameter_NotInteger);
valid = false;
break;
}
}
// Input parameters are numbered starting from 1
if (valid) {
Integer value = Integer.valueOf(parameter.substring(1));
if (value < 1) {
int startPosition = position(expression);
int endPosition = startPosition + parameter.length();
addProblem(expression, startPosition, endPosition, InputParameter_SmallerThanOne);
}
}
}
// Input parameters can only be used in the WHERE or HAVING clause of a query.
// Skip the ORDER BY clause because it has its own validation rule. The exception
// to this rule is in a FUNC expression
validateOwningClause(expression, parameter);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(Join expression) {
boolean joinFetch = expression.hasFetch();
// Missing join association path expression
if (!expression.hasJoinAssociationPath()) {
int startPosition = position(expression) +
expression.getIdentifier().length() +
(expression.hasSpaceAfterJoin() ? 1 : 0);
addProblem(
expression,
startPosition,
joinFetch ? JoinFetch_MissingJoinAssociationPath : Join_MissingJoinAssociationPath
);
}
else {
Expression joinAssociationPath = expression.getJoinAssociationPath();
// Invalid join association path
if (!isValid(joinAssociationPath, JoinAssociationPathExpressionBNF.ID)) {
int startPosition = position(joinAssociationPath);
int endPosition = startPosition + length(joinAssociationPath);
addProblem(expression, startPosition, endPosition, Join_InvalidJoinAssociationPath);
}
// Validate join association path
else {
joinAssociationPath.accept(this);
}
}
// Missing identification variable
// A JOIN expression always needs an identification variable
// A JOIN FETCH expression does not always require an identification, only if 'AS' is present
if (expression.hasJoinAssociationPath() &&
!expression.hasIdentificationVariable() &&
(!joinFetch || expression.hasAs() && isJoinFetchIdentifiable())) {
int startPosition = position(expression) +
expression.getIdentifier().length() +
(expression.hasSpaceAfterJoin() ? 1 : 0) +
length(expression.getJoinAssociationPath()) +
(expression.hasSpaceAfterJoinAssociation() ? 1 : 0) +
(expression.hasAs() ? 2 : 0) +
(expression.hasSpaceAfterAs() ? 1 : 0);
addProblem(
expression,
startPosition,
joinFetch ? JoinFetch_MissingIdentificationVariable : Join_MissingIdentificationVariable
);
}
// A JOIN FETCH expression that cannot be identified with an identification variable
else if (joinFetch &&
!isJoinFetchIdentifiable() &&
(expression.hasAs() || expression.hasIdentificationVariable())) {
int startPosition = position(expression) +
expression.getIdentifier().length() +
(expression.hasSpaceAfterJoin() ? 1 : 0) +
length(expression.getJoinAssociationPath()) +
(expression.hasSpaceAfterJoinAssociation() ? 1 : 0);
int endPosition = startPosition +
(expression.hasAs() ? 2 : 0) +
(expression.hasSpaceAfterAs() ? 1 : 0) +
length(expression.getIdentificationVariable());
addProblem(expression, startPosition, endPosition, JoinFetch_InvalidIdentification);
}
else {
expression.getIdentificationVariable().accept(this);
}
// A JOIN FETCH expression can only be defined in the top-level query
if (joinFetch && isOwnedBySubFromClause(expression)) {
int startPosition = position(expression);
int endPosition = startPosition + length(expression);
addProblem(expression, startPosition, endPosition, JoinFetch_WrongClauseDeclaration);
}
// Traverse the ON clause
expression.getOnClause().accept(this);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(JPQLExpression expression) {
// Validate the statement
if (expression.hasQueryStatement()) {
expression.getQueryStatement().accept(this);
// Now that the entire tree was visited, we can validate the input parameters, which were
// automatically cached. Positional and named parameters must not be mixed in a single query
validateInputParameters(expression);
// Should never have an unknown ending statement
if (expression.hasUnknownEndingStatement()) {
String unknownStatement = expression.getUnknownEndingStatement().toActualText();
// Make sure the unknown ending statement is not a whitespace, one is kept for content assist
if (ExpressionTools.stringIsNotEmpty(unknownStatement)) {
int startPosition = length(expression.getQueryStatement());
int endPosition = startPosition + length(expression.getUnknownEndingStatement());
addProblem(expression, startPosition, endPosition, JPQLExpression_UnknownEnding);
}
// Empty query
else if (!expression.hasQueryStatement()) {
addProblem(expression, 0, length(expression), JPQLExpression_InvalidQuery);
}
}
}
// Invalid query
else {
addProblem(expression, 0, length(expression), JPQLExpression_InvalidQuery);
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(KeyExpression expression) {
// JPA 1.0 does not support a KEY expression
if (isJPA1_0()) {
addProblem(expression, KeyExpression_InvalidJPAVersion);
}
else {
validateAbstractSingleEncapsulatedExpression(expression, keyExpressionHelper());
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(KeywordExpression expression) {
// Nothing to validate
}
/**
* {@inheritDoc}
*/
@Override
public void visit(LengthExpression expression) {
validateAbstractSingleEncapsulatedExpression(expression, lengthExpressionHelper());
}
/**
* {@inheritDoc}
*/
@Override
public void visit(LikeExpression expression) {
// Missing string expression
if (!expression.hasStringExpression()) {
int startPosition = position(expression);
addProblem(expression, startPosition, LikeExpression_MissingStringExpression);
}
// Missing pattern value
if (!expression.hasPatternValue()) {
int startPosition = position(expression) +
length(expression.getStringExpression()) +
4 /* LIKE */ +
(expression.hasSpaceAfterStringExpression() ? 1 : 0) +
(expression.hasNot() ? 1 : 0) +
(expression.hasSpaceAfterLike() ? 1 : 0);
addProblem(expression, startPosition, LikeExpression_MissingPatternValue);
}
// Validate the escape character
if (expression.hasEscape()) {
// Missing escape character
if (!expression.hasEscapeCharacter()) {
int startPosition = position(expression) +
length(expression.getStringExpression()) +
4 /* LIKE */ +
(expression.hasSpaceAfterStringExpression() ? 1 : 0) +
(expression.hasNot() ? 1 : 0) +
(expression.hasSpaceAfterLike() ? 1 : 0) +
length(expression.getPatternValue()) +
(expression.hasSpaceAfterPatternValue() ? 1 : 0) +
6 + /* ESCAPE */ +
(expression.hasSpaceAfterEscape() ? 1 : 0);
addProblem(expression, startPosition, LikeExpression_MissingEscapeCharacter);
}
else {
validateLikeExpressionEscapeCharacter(expression);
}
}
super.visit(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(LocateExpression expression) {
validateAbstractTripleEncapsulatedExpression(expression, locateExpressionHelper());
}
/**
* {@inheritDoc}
*/
@Override
public void visit(LowerExpression expression) {
validateAbstractSingleEncapsulatedExpression(expression, lowerExpressionHelper());
}
/**
* {@inheritDoc}
*/
@Override
public void visit(MaxFunction expression) {
validateAggregateFunctionLocation(expression, maxFunctionHelper());
}
/**
* {@inheritDoc}
*/
@Override
public void visit(MinFunction expression) {
validateAggregateFunctionLocation(expression, minFunctionHelper());
}
/**
* {@inheritDoc}
*/
@Override
public void visit(ModExpression expression) {
validateAbstractDoubleEncapsulatedExpression(expression, modExpressionHelper());
}
/**
* {@inheritDoc}
*/
@Override
public void visit(MultiplicationExpression expression) {
validateArithmeticExpression(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(NotExpression expression) {
// Missing expression
if (!expression.hasExpression()) {
int startPosition = position(expression) +
3 /* NOT */ +
(expression.hasSpaceAfterNot() ? 1 : 0);
addProblem(expression, startPosition, NotExpression_MissingExpression);
}
else {
super.visit(expression);
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(NullComparisonExpression expression) {
// Missing expression
if (!expression.hasExpression()) {
int startPosition = position(expression);
addProblem(expression, startPosition, NullComparisonExpression_MissingExpression);
}
else {
super.visit(expression);
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(NullExpression expression) {
// Nothing to validate
}
/**
* {@inheritDoc}
*/
@Override
public void visit(NullIfExpression expression) {
// JPA 1.0 does not support a NULLIF expression
if (isJPA1_0()) {
addProblem(expression, NullIfExpression_InvalidJPAVersion);
}
else {
validateAbstractDoubleEncapsulatedExpression(expression, nullIfExpressionHelper());
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(NumericLiteral expression) {
String text = expression.getText();
// - Exact numeric literals support the use of Java integer literal syntax as well as SQL
// exact numeric literal syntax
// - Approximate literals support the use Java floating point literal syntax as well as SQL
// approximate numeric literal syntax
// - Appropriate suffixes can be used to indicate the specific type of a numeric literal in
// accordance with the Java Language Specification
if (!isNumericLiteral(text)) {
int startPosition = position(expression);
int endPosition = startPosition + text.length();
addProblem(expression, startPosition, endPosition, NumericLiteral_Invalid, text);
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(ObjectExpression expression) {
validateAbstractSingleEncapsulatedExpression(expression, objectExpressionHelper());
}
/**
* {@inheritDoc}
*/
@Override
public void visit(OnClause expression) {
// Missing conditional expression
if (!expression.hasConditionalExpression()) {
int startPosition = position(expression) +
2 /* ON */ +
(expression.hasSpaceAfterIdentifier() ? 1 : 0);
addProblem(expression, startPosition, OnClause_MissingConditionalExpression);
}
else {
Expression conditionalExpression = expression.getConditionalExpression();
// Invalid conditional expression
if (!isValid(conditionalExpression, ConditionalExpressionBNF.ID)) {
int startPosition = position(expression) +
2 /* ON */ +
(expression.hasSpaceAfterIdentifier() ? 1 : 0);
int endPosition = startPosition + length(conditionalExpression);
addProblem(expression, startPosition, endPosition, OnClause_InvalidConditionalExpression);
}
// Validate the conditional expression
else {
conditionalExpression.accept(this);
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(OrderByClause expression) {
if (!expression.hasOrderByItems()) {
int startPosition = position(expression.getOrderByItems());
int endPosition = startPosition;
addProblem(expression, startPosition, endPosition, OrderByClause_OrderByItemMissing);
}
// Validate the separation of multiple grouping items
else {
validateCollectionSeparatedByComma(
expression.getOrderByItems(),
OrderByClause_OrderByItemEndsWithComma,
OrderByClause_OrderByItemIsMissingComma
);
}
super.visit(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(OrderByItem expression) {
// Missing ordering item
if (!expression.hasExpression()) {
int startPosition = position(expression);
addProblem(expression, startPosition, OrderByItem_MissingStateFieldPathExpression);
}
else {
super.visit(expression);
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(OrExpression expression) {
validateLogicalExpression(
expression,
ConditionalExpressionBNF.ID,
ConditionalExpressionBNF.ID
);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(RangeVariableDeclaration expression) {
// Missing abstract schema name
if (!expression.hasRootObject()) {
int startPosition = position(expression);
addProblem(expression, startPosition, RangeVariableDeclaration_MissingRootObject);
}
else {
Expression rootObject = expression.getRootObject();
if (!isValid(rootObject, RangeDeclarationBNF.ID)) {
int startPosition = position(rootObject);
int endPosition = startPosition + length(rootObject);
addProblem(expression, startPosition, endPosition, RangeVariableDeclaration_InvalidRootObject);
}
else {
rootObject.accept(this);
}
}
// Missing identification variable
if (!expression.hasIdentificationVariable() &&
!expression.hasVirtualIdentificationVariable()) {
int startPosition = position(expression) +
length(expression.getRootObject()) +
(expression.hasSpaceAfterRootObject() ? 1 : 0) +
(expression.hasAs() ? 2 : 0) +
(expression.hasSpaceAfterAs() ? 1 : 0);
addProblem(expression, startPosition, RangeVariableDeclaration_MissingIdentificationVariable);
}
else {
expression.getIdentificationVariable().accept(this);
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(ResultVariable expression) {
// JPA 1.0 does not support a result variable expression
if (isJPA1_0()) {
int startPosition = position(expression) +
length(expression.getSelectExpression()) +
(expression.hasSelectExpression() ? 1 : 0);
int endPosition = startPosition +
(expression.hasAs() ? 2 : 0) +
(expression.hasSpaceAfterAs() ? 1 : 0) +
length(expression.getResultVariable());
addProblem(expression, startPosition, endPosition, ResultVariable_InvalidJPAVersion);
}
else {
// Missing select expression
if (!expression.hasSelectExpression()) {
int startPosition = position(expression);
addProblem(expression, startPosition, ResultVariable_MissingSelectExpression);
}
// Validate the select expression
else {
expression.getSelectExpression().accept(this);
}
// Missing result variable
if (!expression.hasResultVariable()) {
int startPosition = position(expression) +
length(expression.getSelectExpression()) +
(expression.hasSelectExpression() ? 1 : 0) +
(expression.hasAs() ? 2 : 0) +
(expression.hasSpaceAfterAs() ? 1 : 0);
addProblem(expression, startPosition, ResultVariable_MissingResultVariable);
}
// Validate the result variable
else {
expression.getResultVariable().accept(this);
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(SelectClause expression) {
validateAbstractSelectClause(expression, true);
// Make sure the select expression are separated by a comma
if (expression.hasSelectExpression()) {
validateCollectionSeparatedByComma(
expression.getSelectExpression(),
AbstractSelectClause_SelectExpressionEndsWithComma,
AbstractSelectClause_SelectExpressionIsMissingComma
);
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(SelectStatement expression) {
validateAbstractSelectStatement(expression);
super.visit(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(SimpleFromClause expression) {
validateAbstractFromClause(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(SimpleSelectClause expression) {
validateAbstractSelectClause(expression, false);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(SimpleSelectStatement expression) {
validateSimpleSelectStatement(expression);
super.visit(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(SizeExpression expression) {
validateAbstractSingleEncapsulatedExpression(expression, sizeExpressionHelper());
}
/**
* {@inheritDoc}
*/
@Override
public void visit(SqrtExpression expression) {
validateAbstractSingleEncapsulatedExpression(expression, sqrtExpressionHelper());
}
/**
* {@inheritDoc}
*/
@Override
public void visit(StateFieldPathExpression expression) {
validatePathExpression(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(StringLiteral expression) {
if (!expression.hasCloseQuote()) {
addProblem(expression, StringLiteral_MissingClosingQuote);
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(SubExpression expression) {
// Missing sub-expression
if (!expression.hasExpression()) {
int startPosition = position(expression) + 1;
addProblem(expression, startPosition, SubExpression_MissingExpression);
}
else {
// Missing right parenthesis
if (!expression.hasRightParenthesis()) {
int startPosition = position(expression) +
1 /* ( */ +
length(expression.getExpression());
addProblem(expression, startPosition, SubExpression_MissingRightParenthesis);
}
super.visit(expression);
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(SubstringExpression expression) {
validateAbstractTripleEncapsulatedExpression(expression, substringExpressionHelper());
}
/**
* {@inheritDoc}
*/
@Override
public void visit(SubtractionExpression expression) {
validateArithmeticExpression(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(SumFunction expression) {
validateAggregateFunctionLocation(expression, sumFunctionHelper());
}
/**
* {@inheritDoc}
*/
@Override
public void visit(TreatExpression expression) {
// EclipseLink 1.0 does not support TREAT expression
if (isJPA1_0()) {
addProblem(expression, TreatExpression_InvalidJPAPlatform);
}
else {
// TODO
super.visit(expression);
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(TrimExpression expression) {
validateAbstractSingleEncapsulatedExpression(expression, trimExpressionHelper());
// Missing string primary
if (!expression.hasExpression()) {
int startPosition = position(expression) +
4 /* TRIM */ +
(expression.hasLeftParenthesis() ? 1 : 0) +
expression.getSpecification().getValue().length() +
(expression.hasSpaceAfterSpecification() ? 1 : 0) +
length(expression.getTrimCharacter()) +
(expression.hasSpaceAfterTrimCharacter() ? 1 : 0) +
(expression.hasFrom() ? 4 : 0) +
(expression.hasSpaceAfterFrom() ? 1 : 0);
addProblem(expression, startPosition, TrimExpression_MissingExpression);
}
// Invalid string primary
else if (!isValid(expression.getExpression(), expression.encapsulatedExpressionBNF())) {
int startPosition = position(expression) +
4 /* TRIM */ +
(expression.hasLeftParenthesis() ? 1 : 0) +
expression.getSpecification().getValue().length() +
(expression.hasSpaceAfterSpecification() ? 1 : 0) +
length(expression.getTrimCharacter()) +
(expression.hasSpaceAfterTrimCharacter() ? 1 : 0) +
(expression.hasFrom() ? 4 : 0) +
(expression.hasSpaceAfterFrom() ? 1 : 0);
int endPosition = startPosition + length(expression.getExpression());
addProblem(expression, startPosition, endPosition, TrimExpression_InvalidExpression);
}
// Invalid trim character
if (expression.hasTrimCharacter()) {
Expression trimCharacter = expression.getTrimCharacter();
// Make sure it's not an input parameter
String inputParameter = literal(trimCharacter, LiteralType.INPUT_PARAMETER);
if (ExpressionTools.stringIsEmpty(inputParameter)) {
String stringLiteral = literal(trimCharacter, LiteralType.STRING_LITERAL);
int startPosition = position(expression) +
4 /* TRIM */ +
(expression.hasLeftParenthesis() ? 1 : 0) +
expression.getSpecification().getValue().length() +
(expression.hasSpaceAfterSpecification() ? 1 : 0);
int endPosition = startPosition + length(trimCharacter);
if (ExpressionTools.stringIsEmpty(stringLiteral)) {
addProblem(trimCharacter, startPosition, endPosition, TrimExpression_InvalidTrimCharacter);
}
else {
stringLiteral = stringLiteral.substring(1, stringLiteral.length() - (stringLiteral.endsWith("'") ? 1 : 0));
if (stringLiteral.length() != 1) {
addProblem(trimCharacter, startPosition, endPosition, TrimExpression_NotSingleStringLiteral);
}
}
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(TypeExpression expression) {
// JPA 1.0 does not support a TYPE expression
if (isJPA1_0()) {
addProblem(expression, TypeExpression_InvalidJPAVersion);
}
else {
validateAbstractSingleEncapsulatedExpression(expression, typeExpressionHelper());
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(UnknownExpression expression) {
// Nothing to validate and we don't want to validate its encapsulated expression
}
/**
* {@inheritDoc}
*/
@Override
public void visit(UpdateClause expression) {
// Missing range variable declaration
if (!expression.hasRangeVariableDeclaration()) {
int startPosition = position(expression) +
6 /* UPDATE */ +
(expression.hasSpaceAfterUpdate() ? 1 : 0);
addProblem(expression, startPosition, UpdateClause_MissingRangeVariableDeclaration);
}
// Missing 'SET'
else if (!expression.hasSet()) {
int startPosition = position(expression) +
6 /* UPDATE */ +
(expression.hasSpaceAfterUpdate() ? 1 : 0) +
length(expression.getRangeVariableDeclaration()) +
(expression.hasSpaceAfterRangeVariableDeclaration() ? 1 : 0);
addProblem(expression, startPosition, UpdateClause_MissingSet);
}
// Missing update items
else if (!expression.hasUpdateItems()) {
int startPosition = position(expression) +
6 /* UPDATE */ +
(expression.hasSpaceAfterUpdate() ? 1 : 0) +
length(expression.getRangeVariableDeclaration()) +
(expression.hasSpaceAfterRangeVariableDeclaration() ? 1 : 0) +
3 /* 'SET' */ +
(expression.hasSpaceAfterSet() ? 1 : 0);
addProblem(expression, startPosition, UpdateClause_MissingUpdateItems);
}
// Make sure the update items are separated by commas
else {
validateCollectionSeparatedByComma(
expression.getUpdateItems(),
UpdateClause_UpdateItemEndsWithComma,
UpdateClause_UpdateItemIsMissingComma
);
}
super.visit(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(UpdateItem expression) {
// Missing state field path expression
if (!expression.hasStateFieldPathExpression()) {
int startPosition = position(expression);
addProblem(expression, startPosition, UpdateItem_MissingStateFieldPathExpression);
}
// Missing '='
if (expression.hasStateFieldPathExpression() &&
!expression.hasEqualSign()) {
int startPosition = position(expression) +
length(expression.getStateFieldPathExpression()) +
(expression.hasSpaceAfterStateFieldPathExpression() ? 1 : 0);
addProblem(expression, startPosition, UpdateItem_MissingEqualSign);
}
// After '='
else if (expression.hasEqualSign()) {
// Missing new value
if (!expression.hasNewValue()) {
int startPosition = position(expression) +
length(expression.getStateFieldPathExpression()) +
(expression.hasSpaceAfterStateFieldPathExpression() ? 1 : 0) +
1 /* '=' */ +
(expression.hasSpaceAfterEqualSign() ? 1 : 0);
addProblem(expression, startPosition, UpdateItem_MissingNewValue);
}
// Invalid new value
else {
// TODO: Anything to validate?
}
}
super.visit(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(UpdateStatement expression) {
// Done directly by UpdateClause and WhereClause
super.visit(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(UpperExpression expression) {
validateAbstractSingleEncapsulatedExpression(expression, upperExpressionHelper());
}
/**
* {@inheritDoc}
*/
@Override
public void visit(ValueExpression expression) {
// JPA 1.0 does not support a VALUE expression
if (isJPA1_0()) {
addProblem(expression, ValueExpression_InvalidJPAVersion);
}
else {
validateAbstractSingleEncapsulatedExpression(expression, valueExpressionHelper());
}
}
/**
* {@inheritDoc}
*/
@Override
public void visit(WhenClause expression) {
// WHEN expression is missing
if (!expression.hasWhenExpression()) {
int startPosition = position(expression) +
4 /* WHEN */ +
(expression.hasSpaceAfterWhen() ? 1 : 0);
addProblem(expression, startPosition, WhenClause_MissingWhenExpression);
}
// THEN identifier is missing
if (expression.hasWhenExpression() &&
!expression.hasThen()) {
int startPosition = position(expression) +
4 /* WHEN */ +
(expression.hasSpaceAfterWhen() ? 1 : 0) +
length(expression.getWhenExpression()) +
(expression.hasSpaceAfterWhenExpression() ? 1 : 0);
addProblem(expression, startPosition, WhenClause_MissingThenIdentifier);
}
// THEN expression is missing
if (expression.hasThen() &&
!expression.hasThenExpression()) {
int startPosition = position(expression) +
4 /* WHEN */ +
(expression.hasSpaceAfterWhen() ? 1 : 0) +
length(expression.getWhenExpression()) +
(expression.hasSpaceAfterWhenExpression() ? 1 : 0) +
4 /* THEN */ +
(expression.hasSpaceAfterThen() ? 1 : 0);
addProblem(expression, startPosition, WhenClause_MissingThenExpression);
}
super.visit(expression);
}
/**
* {@inheritDoc}
*/
@Override
public void visit(WhereClause expression) {
validateAbstractConditionalClause(
expression,
WhereClause_MissingConditionalExpression,
WhereClause_InvalidConditionalExpression
);
}
/**
* This validate is responsible to validate the collection of {@link Expression Expressions}:
* <ul>
* <li>Making sure they are all separated by a comma or by a space (depending on which one is
* required);</li>
* <li>Making sure it does not end with a comma;</li>
* <li>There is no empty expression between two commas.</li>
* </ul>
*/
protected abstract class AbstractCollectionValidator extends AbstractExpressionVisitor {
String endsWithCommaProblemKey;
boolean validateOnly;
String wrongSeparatorProblemKey;
protected void validateEndsWithComma(CollectionExpression expression) {
if (expression.endsWithComma()) {
int lastIndex = expression.childrenSize() - 1;
int length = expression.toParsedText(lastIndex).length();
int startPosition = position(expression) + length - 1;
if (expression.endsWithSpace()) {
startPosition--;
}
int endPosition = startPosition + 1;
if (!validateOnly) {
addProblem(expression, startPosition, endPosition, endsWithCommaProblemKey);
}
}
}
protected void validateSeparation(CollectionExpression expression) {
for (int index = 0, count = expression.childrenSize(); index + 1 < count; index++) {
Expression expression1 = expression.getChild(index);
if (length(expression1) == 0) {
int startPosition = position(expression1);
int endPosition = startPosition;
addProblem(
expression,
startPosition,
endPosition,
CollectionExpression_MissingExpression,
String.valueOf(index + 1)
);
}
if (!validateSeparator(expression, index)) {
Expression expression2 = expression.getChild(index + 1);
int startPosition = position(expression1) + length(expression1);
int endPosition = position(expression2);
// The space is part of the child expression, move backward
if (!expression.hasSpace(index)) {
startPosition--;
}
if (!validateOnly) {
addProblem(
expression,
startPosition,
endPosition,
wrongSeparatorProblemKey,
expression1.toParsedText(),
expression2.toParsedText()
);
}
}
}
}
/**
* Validates
*
* @param expression
* @param index
* @return
*/
abstract boolean validateSeparator(CollectionExpression expression, int index);
/**
* {@inheritDoc}
*/
@Override
public void visit(CollectionExpression expression) {
validateSeparation(expression);
validateEndsWithComma(expression);
}
}
protected abstract class AbstractDoubleEncapsulatedExpressionHelper<T extends AbstractDoubleEncapsulatedExpression> implements AbstractEncapsulatedExpressionHelper<T> {
/**
* {@inheritDoc}
*/
public String[] arguments(T expression) {
return ExpressionTools.EMPTY_STRING_ARRAY;
}
protected abstract String firstExpressionInvalidKey();
protected int firstExpressionLength(T expression) {
return length(expression.getFirstExpression());
}
protected abstract String firstExpressionMissingKey();
protected boolean hasComma(T expression) {
return !hasFirstExpression(expression) ||
expression.hasComma();
}
protected boolean hasFirstExpression(T expression) {
return expression.hasFirstExpression();
}
/**
* {@inheritDoc}
*/
public boolean hasLeftParenthesis(T expression) {
return expression.hasLeftParenthesis();
}
/**
* {@inheritDoc}
*/
public boolean hasRightParenthesis(T expression) {
// If the second encapsulated expression is missing, then no need
// to add a problem for a missing ')' because the second encapsulated
// expression needs to be specified first
return !expression.hasSecondExpression() ||
expression.hasRightParenthesis();
}
protected boolean hasSecondExpression(T expression) {
return !expression.hasComma() ||
expression.hasSecondExpression();
}
/**
* {@inheritDoc}
*/
public String identifier(T expression) {
return expression.getIdentifier();
}
protected final boolean isFirstExpressionValid(T expression) {
return isValid(expression.getFirstExpression(), expression.parameterExpressionBNF(0));
}
protected final boolean isSecondExpressionValid(T expression) {
return isValid(expression.getSecondExpression(), expression.parameterExpressionBNF(1));
}
protected abstract String missingCommaKey();
protected abstract String secondExpressionInvalidKey();
protected int secondExpressionLength(T expression) {
return length(expression.getSecondExpression());
}
protected abstract String secondExpressionMissingKey();
}
/**
* The root helper that validates any {@link AbstractEncapsulatedExpression}.
*
* @see AbstractDoubleEncapsulatedExpressionHelper
* @see AbstractSingleEncapsulatedExpressionHelper
* @see AbstractTripleEncapsulatedExpressionHelper
*/
protected interface AbstractEncapsulatedExpressionHelper<T extends AbstractEncapsulatedExpression> {
/**
* Returns the arguments that can help to format the localized problem.
*
* @param expression The {@link AbstractEncapsulatedExpression} being validated
* @return The list of arguments used to complete the localized problem
*/
String[] arguments(T expression);
/**
* Determines whether the given {@link AbstractEncapsulatedExpression} has the left parenthesis.
*
* @param expression The {@link AbstractEncapsulatedExpression} being validated
* @return <code>true</code> if the left parenthesis was parsed
*/
boolean hasLeftParenthesis(T expression);
/**
* Determines whether the given {@link AbstractEncapsulatedExpression} has the right parenthesis.
*
* @param expression The {@link AbstractEncapsulatedExpression} being validated
* @return <code>true</code> if the right parenthesis was parsed
*/
boolean hasRightParenthesis(T expression);
/**
* Returns the JPQL identifier of the given {@link AbstractEncapsulatedExpression}.
*
* @param expression The {@link AbstractEncapsulatedExpression} being validated
* @return The JPQL identifier of the given {@link AbstractEncapsulatedExpression}
*/
String identifier(T expression);
/**
* Returns the message key for the problem describing that the left parenthesis is missing.
*
* @param expression The {@link AbstractEncapsulatedExpression} being validated
* @return The key used to retrieve the localized message
*/
String leftParenthesisMissingKey(T expression);
/**
* Returns the message key for the problem describing that the right parenthesis is missing.
*
* @param expression The {@link AbstractEncapsulatedExpression} being validated
* @return The key used to retrieve the localized message
*/
String rightParenthesisMissingKey(T expression);
}
/**
* The abstract implementation of {@link AbstractSingleEncapsulatedExpressionHelper} which
* implements some of the methods since the behavior is the same for all subclasses of
* {@link AbstractSingleEncapsulatedExpression}.
*/
protected abstract class AbstractSingleEncapsulatedExpressionHelper<T extends AbstractSingleEncapsulatedExpression> implements AbstractEncapsulatedExpressionHelper<T> {
/**
* {@inheritDoc}
*/
public String[] arguments(T expression) {
return ExpressionTools.EMPTY_STRING_ARRAY;
}
/**
* Returns the message key for the problem describing that the encapsulated expression is invalid.
*
* @param expression The {@link AbstractSingleEncapsulatedExpression} being validated
* @return The key used to retrieve the localized message
*/
protected abstract String encapsulatedExpressionInvalidKey(T expression);
/**
* Returns the length of the encapsulated expression.
*
* @param expression {@link AbstractSingleEncapsulatedExpression} being validated
* @return The length of the encapsulated expression
*/
protected int encapsulatedExpressionLength(T expression) {
return length(expression.getExpression());
}
/**
* Returns the message key for the problem describing that the encapsulated expression is
* missing.
*
* @param expression The {@link AbstractSingleEncapsulatedExpression} being validated
* @return The key used to retrieve the localized message
*/
protected abstract String encapsulatedExpressionMissingKey(T expression);
/**
* {@inheritDoc}
*/
public boolean hasLeftParenthesis(T expression) {
return expression.hasLeftParenthesis();
}
/**
* {@inheritDoc}
*/
public boolean hasRightParenthesis(T expression) {
// If the encapsulated expression is missing, then no need to
// add a problem for a missing ')' because the encapsulated
// expression needs to be specified first
return !expression.hasEncapsulatedExpression() ||
expression.hasRightParenthesis();
}
/**
* {@inheritDoc}
*/
public final String identifier(T expression) {
return expression.getIdentifier();
}
/**
* Determines whether there is an encapsulated expression or not.
*
* @param expression The {@link AbstractSingleEncapsulatedExpression} being validated
* @return <code>true</code> if the given {@link AbstractSingleEncapsulatedExpression} has an
* encapsulated expression; <code>false</code> otherwise
*/
protected boolean isEncapsulatedExpressionMissing(T expression) {
return !expression.hasExpression();
}
/**
* Determines whether the encapsulated expression is valid.
*
* @param expression The {@link AbstractSingleEncapsulatedExpression} being validated
* @return <code>true</code> if the encapsulated expression is valid; <code>false</code>
* otherwise
*/
protected boolean isEncapsulatedExpressionValid(T expression) {
return isValid(expression.getExpression(), expression.encapsulatedExpressionBNF());
}
/**
* Returns the length after the left parenthesis and before the encapsulated expression starts.
* <p>
* By default, there is no text after the left parenthesis and the encapsulated expression
* but there are exceptions, such as the functions (AVG, COUNT, MIN, MAX, SUM).
*
* @param expression The {@link AbstractSingleEncapsulatedExpression} being validated
* @return The length after the left parenthesis and before the encapsulated expression starts
*/
protected int lengthBeforeEncapsulatedExpression(T expression) {
return 0;
}
}
protected abstract class AbstractTripleEncapsulatedExpressionHelper<T extends AbstractTripleEncapsulatedExpression> implements AbstractEncapsulatedExpressionHelper<T> {
/**
* {@inheritDoc}
*/
public String[] arguments(T expression) {
return ExpressionTools.EMPTY_STRING_ARRAY;
}
protected abstract String firstCommaMissingKey();
protected abstract String firstExpressionInvalidKey();
protected int firstExpressionLength(T expression) {
return length(expression.getFirstExpression());
}
protected abstract String firstExpressionMissingKey();
protected boolean hasFirstExpression(T expression) {
return expression.hasFirstExpression();
}
/**
* {@inheritDoc}
*/
public boolean hasLeftParenthesis(T expression) {
return expression.hasLeftParenthesis();
}
/**
* {@inheritDoc}
*/
public boolean hasRightParenthesis(T expression) {
return !isRightParenthesisMissing(expression);
}
protected boolean hasSecondExpression(T expression) {
return expression.hasSecondExpression();
}
protected boolean hasThirdExpression(T expression) {
return expression.hasThirdExpression();
}
protected boolean isFirstExpressionValid(T expression) {
return isValid(expression.getFirstExpression(), expression.parameterExpressionBNF(0));
}
/**
* Determines whether the right parenthesis is missing from the given expression.
*
* @param expression The {@link Expression} to verify for the existence of the right parenthesis
* by determining if the encapsulated information has been parsed or not
* @return <code>true</code> if the encapsulated information was parsed and the right parenthesis
* is missing; <code>false</code> in any other case
*/
protected boolean isRightParenthesisMissing(T expression) {
if (!expression.hasLeftParenthesis() ||
!expression.hasFirstExpression() ||
expression.hasRightParenthesis()) {
return false;
}
if (expression.hasFirstExpression() &&
!expression.hasFirstComma() &&
!expression.hasSecondExpression() &&
!expression.hasSecondComma() &&
!expression.hasThirdExpression()) {
return false;
}
if (expression.hasFirstComma() &&
!expression.hasSecondExpression() &&
!expression.hasSecondComma() &&
!expression.hasThirdExpression()) {
return false;
}
if (expression.hasSecondExpression() &&
expression.hasSecondComma() &&
!expression.hasThirdExpression()) {
return false;
}
return true;
}
protected boolean isSecondExpressionValid(T expression) {
return isValid(expression.getSecondExpression(), expression.parameterExpressionBNF(1));
}
protected boolean isThirdExpressionValid(T expression) {
return isValid(expression.getThirdExpression(), expression.parameterExpressionBNF(2));
}
protected abstract String secondCommaMissingKey();
protected abstract String secondExpressionInvalidKey();
protected int secondExpressionLength(T expression) {
return length(expression.getSecondExpression());
}
protected abstract String secondExpressionMissingKey();
protected abstract String thirdExpressionInvalidKey();
protected int thirdExpressionLength(T expression) {
return length(expression.getThirdExpression());
}
protected abstract String thirdExpressionMissingKey();
}
/**
* This visitor retrieves the {@link CollectionExpression} if it is visited.
*/
protected static class CollectionExpressionVisitor extends AbstractExpressionVisitor {
/**
* The {@link CollectionExpression} if it is the {@link Expression} that was visited.
*/
protected CollectionExpression expression;
/**
* Creates a new <code>CollectionExpressionVisitor</code>.
*/
protected CollectionExpressionVisitor() {
super();
}
/**
* {@inheritDoc}
*/
@Override
public void visit(CollectionExpression expression) {
this.expression = expression;
}
}
/**
* This validator validates a {@link CollectionExpression} by making sure each item is separated
* by a comma.
*/
protected class CollectionSeparatedByCommaValidator extends AbstractCollectionValidator {
/**
* {@inheritDoc}
*/
@Override
boolean validateSeparator(CollectionExpression expression, int index) {
return expression.hasComma(index);
}
}
/**
* This validator validates a {@link CollectionExpression} by making sure each item is not
* separated by a comma.
*/
protected class CollectionSeparatedBySpaceValidator extends AbstractCollectionValidator {
/**
* {@inheritDoc}
*/
@Override
boolean validateSeparator(CollectionExpression expression, int index) {
return !expression.hasComma(index);
}
}
protected static class ComparisonExpressionVisitor extends AbstractExpressionVisitor {
/**
* The {@link ComparisonExpression} if it is the {@link Expression} that was visited.
*/
ComparisonExpression expression;
/**
* {@inheritDoc}
*/
@Override
public void visit(ComparisonExpression expression) {
this.expression = expression;
}
}
/**
* This visitor checks to see if the visited expression is {@link NullExpression}.
*/
protected static class NullExpressionVisitor extends AbstractExpressionVisitor {
/**
* The {@link NullExpression} if it is the {@link Expression} that was visited.
*/
protected NullExpression expression;
/**
* Creates a new <code>NullExpressionVisitor</code>.
*/
protected NullExpressionVisitor() {
super();
}
/**
* {@inheritDoc}
*/
@Override
public void visit(NullExpression expression) {
this.expression = expression;
}
}
}