/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2010, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.jpa.criteria.expression;

import java.io.Serializable;

import org.hibernate.jpa.criteria.CriteriaBuilderImpl;
import org.hibernate.jpa.criteria.ParameterRegistry;
import org.hibernate.jpa.criteria.compile.RenderingContext;

Represents a NULLliteral expression.
Author:
Steve Ebersole/**
 * Represents a <tt>NULL</tt>literal expression.
 *
 * @author Steve Ebersole
 */
public class NullLiteralExpression<T> extends ExpressionImpl<T> implements Serializable {
	public NullLiteralExpression(CriteriaBuilderImpl criteriaBuilder, Class<T> type) {
		super( criteriaBuilder, type );
	}

	public void registerParameters(ParameterRegistry registry) {
		// nothing to do
	}

	public String render(RenderingContext renderingContext) {
		return "null";
	}

	public String renderProjection(RenderingContext renderingContext) {
		return render( renderingContext );
	}
}