/******************************************************************************* | |
* Copyright (c) 2006, 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 | |
* | |
******************************************************************************/ | |
package org.eclipse.persistence.jpa.jpql.parser; | |
import org.eclipse.persistence.jpa.jpql.WordParser; | |
/** | |
* This {@link RangeVariableDeclaration} creates a new {@link RangeVariableDeclaration}. | |
* | |
* @see RangeVariableDeclaration | |
* | |
* @version 2.4 | |
* @since 2.3 | |
* @author Pascal Filion | |
*/ | |
@SuppressWarnings("nls") | |
public final class RangeVariableDeclarationFactory extends ExpressionFactory { | |
/** | |
* The unique identifier of this {@link RangeVariableDeclarationFactory}. | |
*/ | |
public static final String ID = "range_variable_declaration"; | |
/** | |
* Creates a new <code>RangeVariableDeclarationFactory</code>. | |
*/ | |
public RangeVariableDeclarationFactory() { | |
super(ID); | |
} | |
/** | |
* {@inheritDoc} | |
*/ | |
@Override | |
protected AbstractExpression buildExpression(AbstractExpression parent, | |
WordParser wordParser, | |
String word, | |
JPQLQueryBNF queryBNF, | |
AbstractExpression expression, | |
boolean tolerant) { | |
ExpressionRegistry registry = getExpressionRegistry(); | |
// When the tolerant mode is turned on, parse the invalid portion of the query, | |
// Order/Group are two exceptions to this rule | |
// (expression != null) skip this check when parsing the first range variable declaration | |
if (tolerant && | |
expression != null && | |
// TODO: TOTALLY REDO THIS PART TO HANDLE A GENERIC WAY TO PARSE COMPOSITE CLAUSE IDENTIFIERS | |
!word.equalsIgnoreCase("order") && | |
!word.equalsIgnoreCase("group") && | |
!word.equalsIgnoreCase("start") && | |
!word.equalsIgnoreCase("connect") && | |
registry.isIdentifier(word)) { | |
ExpressionFactory factory = registry.expressionFactoryForIdentifier(word); | |
if (factory == null) { | |
return null; | |
} | |
expression = factory.buildExpression(parent, wordParser, word, queryBNF, expression, tolerant); | |
if (expression != null) { | |
return new BadExpression(parent, expression); | |
} | |
} | |
expression = new RangeVariableDeclaration(parent); | |
expression.parse(wordParser, tolerant); | |
return expression; | |
} | |
} |