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/*
 * The contents of this file are subject to the terms 
 * of the Common Development and Distribution License 
 * (the "License").  You may not use this file except 
 * in compliance with the License.
 * 
 * You can obtain a copy of the license at 
 * glassfish/bootstrap/legal/CDDLv1.0.txt or 
 * https://glassfish.dev.java.net/public/CDDLv1.0.html. 
 * See the License for the specific language governing 
 * permissions and limitations under the License.
 * 
 * When distributing Covered Code, include this CDDL 
 * HEADER in each file and include the License file at 
 * glassfish/bootstrap/legal/CDDLv1.0.txt.  If applicable, 
 * add the following below this CDDL HEADER, with the 
 * fields enclosed by brackets "[]" replaced with your 
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// Copyright (c) 1998, 2007, Oracle. All rights reserved.  
package oracle.toplink.essentials.internal.parsing;

import oracle.toplink.essentials.expressions.*;

/**
 * INTERNAL
 * 

Purpose: Represent a CONCAT in EJBQL *

Responsibilities:

    *
  • Generate the correct expression for a CONCAT in EJBQL *
* @author Jon Driscoll and Joel Lucuik * @since TopLink 4.0 */ public class ConcatNode extends StringFunctionNode { /** * ConcatNode constructor comment. */ public ConcatNode() { super(); } /** * INTERNAL * Validate node and calculate its type. */ public void validate(ParseTreeContext context) { super.validate(context); TypeHelper typeHelper = context.getTypeHelper(); if ((left != null) && (right != null)) { left.validateParameter(context, typeHelper.getStringType()); right.validateParameter(context, typeHelper.getStringType()); } setType(typeHelper.getStringType()); } /** * INTERNAL * Generate the TopLink expression for this node */ public Expression generateExpression(GenerationContext context) { Expression whereClause = getLeft().generateExpression(context); whereClause = whereClause.concat(getRight().generateExpression(context)); return whereClause; } }




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