/*
* $Header$
* $Revision: 982 $
* $Date: 2006-12-08 18:42:51 +1000 (Fri, 08 Dec 2006) $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2003-2009 The JRDF Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* the JRDF Project (http://jrdf.sf.net/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The JRDF Project" and "JRDF" must not be used to endorse
* or promote products derived from this software without prior written
* permission. For written permission, please contact
* newmana@users.sourceforge.net.
*
* 5. Products derived from this software may not be called "JRDF"
* nor may "JRDF" appear in their names without prior written
* permission of the JRDF Project.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the JRDF Project. For more
* information on JRDF, please see <http://jrdf.sourceforge.net/>.
*
*/
package org.jrdf.sparql.analysis;
import org.jrdf.graph.AnyNode;
import org.jrdf.graph.Node;
import org.jrdf.query.expression.BoundOperator;
import org.jrdf.query.expression.Expression;
import org.jrdf.query.expression.LangOperator;
import org.jrdf.query.expression.SingleValue;
import org.jrdf.query.expression.StrOperator;
import static org.jrdf.query.expression.logic.FalseExpression.FALSE_EXPRESSION;
import static org.jrdf.query.expression.logic.TrueExpression.TRUE_EXPRESSION;
import org.jrdf.query.relation.Attribute;
import org.jrdf.query.relation.attributename.AttributeName;
import org.jrdf.query.relation.attributename.VariableName;
import static org.jrdf.query.relation.constants.NullaryAttribute.NULLARY_ATTRIBUTE;
import org.jrdf.query.relation.mem.AttributeImpl;
import org.jrdf.query.relation.type.NodeType;
import org.jrdf.query.relation.type.ObjectNodeType;
import org.jrdf.query.relation.type.PositionalNodeType;
import org.jrdf.sparql.builder.LiteralBuilder;
import org.jrdf.sparql.builder.URIReferenceBuilder;
import org.jrdf.sparql.parser.analysis.DepthFirstAdapter;
import org.jrdf.sparql.parser.node.ABoundBuiltincall;
import org.jrdf.sparql.parser.node.AFalseBooleanLiteral;
import org.jrdf.sparql.parser.node.AIriRefIriRefOrPrefixedName;
import org.jrdf.sparql.parser.node.ALangBuiltincall;
import org.jrdf.sparql.parser.node.APrefixedNameIriRefOrPrefixedName;
import org.jrdf.sparql.parser.node.ARdfLiteralPrimaryExpression;
import org.jrdf.sparql.parser.node.AStrBuiltincall;
import org.jrdf.sparql.parser.node.ATrueBooleanLiteral;
import org.jrdf.sparql.parser.node.AVariable;
import org.jrdf.sparql.parser.parser.ParserException;
import java.util.HashMap;
import java.util.Map;
public class NumericExpressionAnalyserImpl extends DepthFirstAdapter implements NumericExpressionAnalyser {
private ParserException exception;
private AttributeName attributeName;
private org.jrdf.graph.Node value;
private LiteralBuilder literalBuilder;
private VariableCollector collector;
private URIReferenceBuilder uriBuilder;
private Expression expression;
public NumericExpressionAnalyserImpl(LiteralBuilder newLiteralBuilder, VariableCollector newCollector,
URIReferenceBuilder newUriBuilder) {
this.literalBuilder = newLiteralBuilder;
this.collector = newCollector;
this.uriBuilder = newUriBuilder;
}
public Expression getExpression() throws ParserException {
if (exception != null) {
throw exception;
}
return expression;
}
@Override
public void caseABoundBuiltincall(ABoundBuiltincall node) {
node.getBracketedVar().apply(this);
try {
this.expression = new BoundOperator(getSingleAvp());
} catch (ParserException e) {
this.exception = e;
}
}
@Override
public void caseALangBuiltincall(ALangBuiltincall node) {
node.getBracketedExpression().apply(this);
try {
this.expression = new LangOperator(getSingleAvp());
} catch (ParserException e) {
this.exception = e;
}
}
@Override
public void caseAStrBuiltincall(AStrBuiltincall node) {
try {
node.getBracketedExpression().apply(this);
this.expression = new StrOperator(getSingleAvp());
} catch (ParserException e) {
this.exception = e;
}
}
@Override
public void caseARdfLiteralPrimaryExpression(ARdfLiteralPrimaryExpression node) {
try {
this.value = literalBuilder.createLiteral(node);
this.expression = new SingleValue(getSingleAvp());
} catch (ParserException e) {
exception = e;
}
}
@Override
public void caseAVariable(AVariable node) {
this.attributeName = new VariableName(node.getVariablename().getText());
this.value = AnyNode.ANY_NODE;
try {
this.expression = new SingleValue(getSingleAvp());
} catch (ParserException e) {
this.exception = e;
}
}
@Override
public void caseAIriRefIriRefOrPrefixedName(AIriRefIriRefOrPrefixedName node) {
try {
this.value = uriBuilder.createURIReference(node);
this.expression = new SingleValue(getSingleAvp());
} catch (ParserException e) {
exception = e;
}
}
@Override
public void caseAPrefixedNameIriRefOrPrefixedName(APrefixedNameIriRefOrPrefixedName node) {
try {
this.value = uriBuilder.createURIReference(node);
this.expression = new SingleValue(getSingleAvp());
} catch (ParserException e) {
exception = e;
}
}
@Override
public void caseATrueBooleanLiteral(ATrueBooleanLiteral node) {
try {
if (attributeName == null) {
attributeName = NULLARY_ATTRIBUTE.getAttributeName();
}
this.value = literalBuilder.createLiteral(node);
this.expression = TRUE_EXPRESSION;
} catch (ParserException e) {
exception = e;
}
}
@Override
public void caseAFalseBooleanLiteral(AFalseBooleanLiteral node) {
try {
if (attributeName == null) {
attributeName = NULLARY_ATTRIBUTE.getAttributeName();
}
this.value = literalBuilder.createLiteral(node);
this.expression = FALSE_EXPRESSION;
} catch (ParserException e) {
exception = e;
}
}
private Map<Attribute, Node> getSingleAvp() throws ParserException {
if (exception != null) {
throw exception;
}
Map<Attribute, Node> returnValue = new HashMap<Attribute, Node>(1);
final Map<AttributeName, PositionalNodeType> namePosMap = collector.getAttributes();
if (attributeName == null) {
returnValue.put(NULLARY_ATTRIBUTE, value);
} else {
NodeType type = namePosMap.get(attributeName);
type = (type == null) ? new ObjectNodeType() : type;
Attribute attribute = new AttributeImpl(attributeName, type);
returnValue.put(attribute, value);
collector.addConstraints(returnValue);
}
return returnValue;
}
}