Hibernate example source code file (EntityIdentifier.java)

This example Hibernate source code file (EntityIdentifier.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

assertionfailure, basicattributebinding, basicattributebinding, entitybinding, entityidentifier, entityidentifier, identifier, identifier, identifiergenerator, identifiergenerator, idgenerator, properties, util

The Hibernate EntityIdentifier.java source code

/*
 * 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.metamodel.binding;

import java.util.Properties;

import org.hibernate.AssertionFailure;
import org.hibernate.id.IdentifierGenerator;
import org.hibernate.id.factory.IdentifierGeneratorFactory;

/**
 * Binds the entity identifier.
 *
 * @author Steve Ebersole
 * @author Hardy Ferentschik
 */
public class EntityIdentifier {
	private final EntityBinding entityBinding;
	private BasicAttributeBinding attributeBinding;
	private IdentifierGenerator identifierGenerator;
	private IdGenerator idGenerator;
	private boolean isIdentifierMapper = false;
	// todo : mappers, etc

	/**
	 * Create an identifier
	 *
	 * @param entityBinding the entity binding for which this instance is the id
	 */
	public EntityIdentifier(EntityBinding entityBinding) {
		this.entityBinding = entityBinding;
	}

	public BasicAttributeBinding getValueBinding() {
		return attributeBinding;
	}

	public void setValueBinding(BasicAttributeBinding attributeBinding) {
		if ( this.attributeBinding != null ) {
			throw new AssertionFailure(
					String.format(
							"Identifier value binding already existed for %s",
							entityBinding.getEntity().getName()
					)
			);
		}
		this.attributeBinding = attributeBinding;
	}

	public void setIdGenerator(IdGenerator idGenerator) {
		this.idGenerator = idGenerator;
	}

	public boolean isEmbedded() {
		return attributeBinding.getSimpleValueSpan() > 1;
	}

	public boolean isIdentifierMapper() {
		return isIdentifierMapper;
	}

	// todo do we really need this createIdentifierGenerator and how do we make sure the getter is not called too early
	// maybe some sort of visitor pattern here!? (HF)
	public IdentifierGenerator createIdentifierGenerator(IdentifierGeneratorFactory factory, Properties properties) {
		if ( idGenerator != null ) {
			identifierGenerator = attributeBinding.createIdentifierGenerator( idGenerator, factory, properties );
		}
		return identifierGenerator;
	}

	public IdentifierGenerator getIdentifierGenerator() {
		return identifierGenerator;
	}
}