AllOrAnyExpressionFactory.java

/*******************************************************************************
 * 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;
import static org.eclipse.persistence.jpa.jpql.parser.Expression.*;

/**
 * This {@link AllOrAnyExpressionFactory} creates a new {@link AllOrAnyExpression} when the portion
 * of the query to parse starts with <b>ALL</b>, <b>ANY</b> or <b>SOME</b>.
 *
 * @see AllOrAnyExpression
 *
 * @version 2.5
 * @since 2.3
 * @author Pascal Filion
 */
@SuppressWarnings("nls")
public final class AllOrAnyExpressionFactory extends ExpressionFactory {

    /**
     * The unique identifier of this {@link AllOrAnyExpressionFactory}.
     */
    public static final String ID = "all-or-any";

    /**
     * Creates a new <code>AndExpressionFactory</code>.
     */
    public AllOrAnyExpressionFactory() {
        super(ID, Expression.ALL,
                  Expression.ANY,
                  Expression.SOME);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected AbstractExpression buildExpression(AbstractExpression parent,
                                                 WordParser wordParser,
                                                 String word,
                                                 JPQLQueryBNF queryBNF,
                                                 AbstractExpression expression,
                                                 boolean tolerant) {

        switch (word.charAt(0)) {
            case 's': case 'S': word = SOME; break;
            default: {
                switch (word.charAt(1)) {
                    case 'l': case 'L': word = ALL; break;
                    default:            word = ANY; break;
                }
            }
        }

        expression = new AllOrAnyExpression(parent, word);
        expression.parse(wordParser, tolerant);
        return expression;
    }
}