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/*
* Copyright (c) 2006, 2018 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 v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// Oracle - initial API and implementation
//
package org.eclipse.persistence.jpa.jpql.parser;
/**
* This {@link KeyExpressionFactory} creates a new {@link KeyExpression} when the portion of the
* query to parse starts with KEY.
*
* @see KeyExpression
*
* @version 2.4
* @since 2.3
* @author Pascal Filion
*/
public final class KeyExpressionFactory extends GeneralIdentificationExpressionFactory {
/**
* The unique identifier of this {@link KeyExpressionFactory}.
*/
public static final String ID = Expression.KEY;
/**
* Creates a new KeyExpressionFactory
.
*/
public KeyExpressionFactory() {
super(ID, Expression.KEY);
}
/**
* {@inheritDoc}
*/
@Override
protected AbstractExpression buildExpression(AbstractExpression parent) {
return new KeyExpression(parent);
}
}