/*******************************************************************************
* Copyright (c) 1998, 2009 Oracle. 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 from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.internal.jpa.parsing;
import org.eclipse.persistence.expressions.Expression;
/**
* INTERNAL
* <p><b>Purpose</b>: Represent a WHERE
* <p><b>Responsibilities</b>:<ul>
* <li> Apply this where clause to a query
* </ul>
* @author Jon Driscoll
* @since TopLink 5.0
*/
public class WhereNode extends MajorNode {
/**
* INTERNAL
* Validate node and calculate its type.
*/
public void validate(ParseTreeContext context) {
if (left != null) {
left.validate(context);
TypeHelper typeHelper = context.getTypeHelper();
setType(typeHelper.getBooleanType());
}
}
/**
* INTERNAL
* @param context The generation context
* @return An EclipseLink expression
*/
public Expression generateExpression(GenerationContext context) {
Expression whereClause = null;
if (getLeft() != null) {
whereClause = getLeft().generateExpression(context);
}
return whereClause;
}
}