/******************************************************************************* | |
* 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.exceptions.JPQLException; | |
/** | |
* INTERNAL | |
* <p><b>Purpose</b>: Represent JOIN identification variable | |
* declaration as part of the FROM clause: JOIN c.orders o. | |
* <p><b>Responsibilities</b>:<ul> | |
* <li> Manage the path node and the outer join flag of the JOIN clause. | |
* </ul> | |
*/ | |
public class JoinDeclNode extends IdentificationVariableDeclNode { | |
private Node path; | |
private boolean outerJoin; | |
/** */ | |
public Node getPath() { | |
return path; | |
} | |
/** */ | |
public void setPath(Node node) { | |
path = node; | |
} | |
/** */ | |
public boolean isOuterJoin() { | |
return outerJoin; | |
} | |
/** */ | |
public void setOuterJoin(boolean outerJoin) { | |
this.outerJoin = outerJoin; | |
} | |
/** | |
* INTERNAL | |
* Check the path child node for an unqualified field access and if so, | |
* replace it by a qualified field access. | |
*/ | |
public Node qualifyAttributeAccess(ParseTreeContext context) { | |
if (path != null) { | |
path = path.qualifyAttributeAccess(context); | |
} | |
return this; | |
} | |
/** | |
* INTERNAL | |
* Validate node and calculate its type. | |
*/ | |
public void validate(ParseTreeContext context) { | |
super.validate(context); | |
if (path != null) { | |
path.validate(context); | |
setType(path.getType()); | |
// join of embedded attribute is not supported. | |
if (path.isDotNode()) { | |
TypeHelper typeHelper = context.getTypeHelper(); | |
Node left = path.getLeft(); | |
AttributeNode right = (AttributeNode)path.getRight(); | |
if ((left != null) && (right != null)) { | |
if (typeHelper.isEmbeddedAttribute(left.getType(), right.getAttributeName())) | |
throw JPQLException.unsupportJoinArgument( | |
context.getQueryInfo(), getLine(), getColumn(), | |
"Join", getType().toString()); | |
} | |
} | |
} | |
} | |
} |