oracle.toplink.essentials.internal.parsing.FromNode Maven / Gradle / Ivy
/*
* 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
* own identifying information: Portions Copyright [yyyy]
* [name of copyright owner]
*/
// Copyright (c) 1998, 2007, Oracle. All rights reserved.
package oracle.toplink.essentials.internal.parsing;
import java.util.*;
/**
* INTERNAL
* Purpose: Represent a FROM
*
Responsibilities:
* - Determines the context for the Parse Tree
*
- Determine the reference class for a query
*
- Handle any FROM ... IN clauses
*
* @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);
}
}
}