/******************************************************************************* | |
* 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 java.util.Iterator; | |
import java.util.List; | |
import org.eclipse.persistence.expressions.*; | |
/** | |
* INTERNAL | |
* <p><b>Purpose</b>: Represent a CONCAT in EJBQL | |
* <p><b>Responsibilities</b>:<ul> | |
* <li> Generate the correct expression for a CONCAT in EJBQL | |
* </ul> | |
* @author Jon Driscoll and Joel Lucuik | |
* @since TopLink 4.0 | |
*/ | |
public class ConcatNode extends StringFunctionNode { | |
protected List objects = null; | |
/** | |
* 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(); | |
Iterator i = objects.iterator(); | |
while (i.hasNext()){ | |
Node node = (Node)i.next(); | |
node.validate(context); | |
node.validateParameter(context, typeHelper.getStringType()); | |
} | |
setType(typeHelper.getStringType()); | |
} | |
/** | |
* INTERNAL | |
* Generate the EclipseLink expression for this node | |
*/ | |
public Expression generateExpression(GenerationContext context) { | |
Expression whereClause = ((Node)objects.get(0)).generateExpression(context); | |
for (int i=1;i<objects.size();i++){ | |
whereClause = whereClause.concat(((Node)objects.get(i)).generateExpression(context)); | |
} | |
return whereClause; | |
} | |
public void setObjects(List objects){ | |
this.objects = objects; | |
} | |
} |