org.eclipse.persistence.jpa.jpql.parser.ObjectExpression 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 f2b9fc5

There is a newer version: 5.0.0-B03

/*
 * 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;

/**
 * Stand-alone identification variables in the SELECT clause may optionally be qualified by
 * the OBJECT operator. The SELECT clause must not use the OBJECT operator to
 * qualify path expressions.
 *
 * BNF: expression ::= OBJECT(identification_variable)
 *
 * @version 2.5
 * @since 2.3
 * @author Pascal Filion
 */
public final class ObjectExpression extends EncapsulatedIdentificationVariableExpression {

    /**
     * Creates a new ObjectExpression.
     *
     * @param parent The parent of this expression
     */
    public ObjectExpression(AbstractExpression parent) {
        super(parent, OBJECT);
    }

    /**
     * {@inheritDoc}
     */
    public void accept(ExpressionVisitor visitor) {
        visitor.visit(this);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public JPQLQueryBNF getQueryBNF() {
        return getQueryBNF(ObjectExpressionBNF.ID);
    }
}