/******************************************************************************* | |
* Copyright (c) 1998, 2013 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 from Oracle TopLink | |
******************************************************************************/ | |
package org.eclipse.persistence.internal.jpa.parsing; | |
import org.eclipse.persistence.expressions.*; | |
/** | |
* INTERNAL | |
* <p><b>Purpose</b>: Represent a LIKE in EJBQL | |
* <p><b>Responsibilities</b>:<ul> | |
* <li> Generate the correct expression for a LIKE | |
* </ul> | |
* @author Jon Driscoll and Joel Lucuik | |
* @since TopLink 4.0 | |
*/ | |
public class LikeNode extends SimpleConditionalExpressionNode { | |
private EscapeNode escape = null; | |
/** | |
* LikeNode constructor comment. | |
*/ | |
public LikeNode() { | |
super(); | |
} | |
/** | |
* INTERNAL | |
* Validate the current node and calculates its type. | |
*/ | |
public void validate(ParseTreeContext context) { | |
TypeHelper typeHelper = context.getTypeHelper(); | |
if (left != null) { | |
left.validate(context); | |
left.validateParameter(context, typeHelper.getStringType()); | |
} | |
if (right != null) { | |
right.validate(context); | |
right.validateParameter(context, typeHelper.getStringType()); | |
} | |
if (escape != null) { | |
escape.validate(context); | |
} | |
setType(typeHelper.getBooleanType()); | |
} | |
/** | |
* INTERNAL | |
* Return a EclipseLink expression for this node. | |
*/ | |
public Expression generateExpression(GenerationContext context) { | |
Expression whereClause = getLeft().generateExpression(context); | |
if (!hasEscape()) { | |
whereClause = whereClause.like(getRight().generateExpression(context)); | |
} else { | |
whereClause = whereClause.like(getRight().generateExpression(context), getEscapeNode().generateExpression(context)); | |
} | |
return whereClause; | |
} | |
public boolean hasEscape() { | |
return getEscapeNode() != null; | |
} | |
// Accessors | |
public EscapeNode getEscapeNode() { | |
return escape; | |
} | |
public void setEscapeNode(EscapeNode node) { | |
escape = node; | |
} | |
} |