/*******************************************************************************
* Copyright (c) 2006, 2015 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
*
******************************************************************************/
package org.eclipse.persistence.jpa.jpql.parser;
import org.eclipse.persistence.jpa.jpql.WordParser;
/**
* This <code>IdentificationVariableDeclarationFactory</code> handles parsing the JPQL fragment
* within the <code><b>FROM</b></code> clause.
*
* @see IdentificationVariableDeclaration
* @see CollectionMemberDeclaration
*
* @version 2.4
* @since 2.3
* @author Pascal Filion
*/
@SuppressWarnings("nls")
public final class IdentificationVariableDeclarationFactory extends ExpressionFactory {
/**
* The unique identifier of this {@link IdentificationVariableDeclarationFactory}.
*/
public static final String ID = "identification-variable-declaration";
/**
* Creates a new <code>IdentificationVariableDeclarationFactory</code>.
*/
public IdentificationVariableDeclarationFactory() {
super(ID);
}
/**
* {@inheritDoc}
*/
@Override
protected AbstractExpression buildExpression(AbstractExpression parent,
WordParser wordParser,
String word,
JPQLQueryBNF queryBNF,
AbstractExpression expression,
boolean tolerant) {
if (word.equalsIgnoreCase(Expression.IN)) {
expression = new CollectionMemberDeclaration(parent);
}
else {
expression = new IdentificationVariableDeclaration(parent);
}
expression.parse(wordParser, tolerant);
return expression;
}
}