/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2009 by Red Hat Inc and/or its affiliates or by
* third-party contributors as indicated by either @author tags or express
* copyright attribution statements applied by the authors. All
* third-party contributions are distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.ejb.criteria.expression.function;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.persistence.criteria.Expression;
import org.hibernate.ejb.criteria.ParameterContainer;
import org.hibernate.ejb.criteria.ParameterRegistry;
import org.hibernate.ejb.criteria.CriteriaBuilderImpl;
import org.hibernate.ejb.criteria.CriteriaQueryCompiler;
import org.hibernate.ejb.criteria.Renderable;
import org.hibernate.ejb.criteria.expression.LiteralExpression;
/**
* Support for functions with parameters.
*
* @author Steve Ebersole
*/
public class ParameterizedFunctionExpression<X>
extends BasicFunctionExpression<X>
implements FunctionExpression<X> {
private final List<Expression<?>> argumentExpressions;
public ParameterizedFunctionExpression(
CriteriaBuilderImpl criteriaBuilder,
Class<X> javaType,
String functionName,
List<Expression<?>> argumentExpressions) {
super( criteriaBuilder, javaType, functionName );
this.argumentExpressions = argumentExpressions;
}
public ParameterizedFunctionExpression(
CriteriaBuilderImpl criteriaBuilder,
Class<X> javaType,
String functionName,
Expression<?>... argumentExpressions) {
super( criteriaBuilder, javaType, functionName );
this.argumentExpressions = Arrays.asList( argumentExpressions );
}
protected static List<Expression<?>> wrapAsLiterals(CriteriaBuilderImpl criteriaBuilder, Object... literalArguments) {
List<Expression<?>> arguments = new ArrayList<Expression<?>>( properSize( literalArguments.length) );
for ( Object o : literalArguments ) {
arguments.add( new LiteralExpression( criteriaBuilder, o ) );
}
return arguments;
}
protected static int properSize(int number) {
return number + (int)( number*.75 ) + 1;
}
public List<Expression<?>> getArgumentExpressions() {
return argumentExpressions;
}
@Override
public void registerParameters(ParameterRegistry registry) {
for ( Expression argument : getArgumentExpressions() ) {
if ( ParameterContainer.class.isInstance( argument ) ) {
( (ParameterContainer) argument ).registerParameters(registry);
}
}
}
@Override
public String render(CriteriaQueryCompiler.RenderingContext renderingContext) {
StringBuilder buffer = new StringBuilder();
buffer.append( getFunctionName() ).append( '(' );
renderArguments( buffer, renderingContext );
buffer.append( ')' );
return buffer.toString();
}
protected void renderArguments(StringBuilder buffer, CriteriaQueryCompiler.RenderingContext renderingContext) {
for ( Expression argument : argumentExpressions ) {
buffer.append( ( (Renderable) argument ).render( renderingContext ) );
}
}
}