org.eclipse.persistence.jpa.jpql.parser.LogicalExpression Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of eclipselink Show documentation

EclipseLink build based upon Git transaction 346465e

There is a newer version: 5.0.0-B07

/*******************************************************************************
 * 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 expression represents a logical expression, which means the first and second expressions are
 * aggregated with either AND or OR.
 *
 * @version 2.5
 * @since 2.3
 * @author Pascal Filion
 */
public abstract class LogicalExpression extends CompoundExpression {

	/**
	 * Creates a new LogicalExpression.
	 *
	 * @param parent The parent of this expression
	 * @param identifier The identifier of this expression
	 */
	protected LogicalExpression(AbstractExpression parent, String identifier) {
		super(parent, identifier);
	}

	/**
	 * {@inheritDoc}
	 */
	public final JPQLQueryBNF getQueryBNF() {
		return getQueryBNF(ConditionalExpressionBNF.ID);
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected boolean isParsingComplete(WordParser wordParser, String word, Expression expression) {
		return wordParser.character() == RIGHT_PARENTHESIS ||
		       word.equalsIgnoreCase(OR)                   ||
		       super.isParsingComplete(wordParser, word, expression);
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected String parseIdentifier(WordParser wordParser) {
		return getText();
	}
}