/******************************************************************************* | |
* 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.*; | |
/** | |
* INTERNAL | |
* <p><b>Purpose</b>: Represent a FROM | |
* <p><b>Responsibilities</b>:<ul> | |
* <li> Determines the context for the Parse Tree | |
* <li> Determine the reference class for a query | |
* <li> Handle any FROM ... IN clauses | |
* </ul> | |
* @author Jon Driscoll | |
* @since TopLink 5.0 | |
*/ | |
public class FromNode extends MajorNode { | |
private List declarations; | |
public String getFirstVariable() { | |
String variable = null; | |
if ((declarations != null) && (declarations.size() > 0)) { | |
variable = ((IdentificationVariableDeclNode)declarations.get(0)).getCanonicalVariableName(); | |
} | |
return variable; | |
} | |
public List getDeclarations() { | |
return declarations; | |
} | |
public void setDeclarations(List decls) { | |
declarations = decls; | |
} | |
/** | |
* INTERNAL | |
* Check the declaration nodes for a path expression starting with a | |
* unqualified field access and if so, replace it by a qualified field | |
* access. | |
*/ | |
public Node qualifyAttributeAccess(ParseTreeContext context) { | |
for (int i = 0; i < declarations.size(); i++) { | |
Node decl = (Node)declarations.get(i); | |
declarations.set(i, decl.qualifyAttributeAccess(context)); | |
} | |
return this; | |
} | |
/** | |
* INTERNAL | |
* Validate the current node. | |
*/ | |
public void validate(ParseTreeContext context) { | |
for (Iterator i = declarations.iterator(); i.hasNext();) { | |
Node decl = (Node)i.next(); | |
decl.validate(context); | |
} | |
} | |
} |