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Extensible parser for HQL/JP-QL queries

There is a newer version: 1.5.0.Final

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * JBoss, Home of Professional Open Source
 * Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors
 * as indicated by the @authors tag. All rights reserved.
 * See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * 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, v. 2.1.
 * This program is distributed in the hope that it will be useful, but WITHOUT A
 * 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,
 * v.2.1 along with this distribution; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA  02110-1301, USA.
 */
package org.hibernate.hql.ast.spi.predicate;

import org.hibernate.hql.internal.logging.Log;
import org.hibernate.hql.internal.logging.LoggerFactory;

/**
 * Base class for predicate implementations.
 *
 * @author Gunnar Morling
 */
public abstract class AbstractPredicate implements Predicate {

	private static final Log log = LoggerFactory.make();

	private final Type type;

	public AbstractPredicate(Type type) {
		this.type = type;
	}

	@Override
	public Type getType() {
		return type;
	}

	@Override
	public > T as(Class type) {
		if ( type.isAssignableFrom( getClass() ) ) {
			return type.cast( this );
		}

		throw log.getUnsupportedPredicateTypeException( this, type.getCanonicalName() );
	}
}