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Hibernate example source code file (DynamicMapEntityTuplizer.java)

This example Hibernate source code file (DynamicMapEntityTuplizer.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

basicentitynameresolver, dynamicmapentitytuplizer, entitynameresolver, getter, getter, hibernateexception, override, override, persistentclass, proxyfactory, proxyfactory, setter, string, string, util

The Hibernate DynamicMapEntityTuplizer.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008, Red Hat Middleware LLC 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 Middleware LLC.
 *
 * 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.tuple.entity;
import java.util.Map;
import org.hibernate.EntityMode;
import org.hibernate.EntityNameResolver;
import org.hibernate.HibernateException;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.mapping.PersistentClass;
import org.hibernate.mapping.Property;
import org.hibernate.metamodel.binding.AttributeBinding;
import org.hibernate.metamodel.binding.EntityBinding;
import org.hibernate.property.Getter;
import org.hibernate.property.PropertyAccessor;
import org.hibernate.property.PropertyAccessorFactory;
import org.hibernate.property.Setter;
import org.hibernate.proxy.ProxyFactory;
import org.hibernate.proxy.map.MapProxyFactory;
import org.hibernate.tuple.DynamicMapInstantiator;
import org.hibernate.tuple.Instantiator;
import org.jboss.logging.Logger;

/**
 * An {@link EntityTuplizer} specific to the dynamic-map entity mode.
 *
 * @author Steve Ebersole
 * @author Gavin King
 */
public class DynamicMapEntityTuplizer extends AbstractEntityTuplizer {

    private static final CoreMessageLogger LOG = Logger.getMessageLogger(CoreMessageLogger.class,
                                                                       DynamicMapEntityTuplizer.class.getName());

	DynamicMapEntityTuplizer(EntityMetamodel entityMetamodel, PersistentClass mappedEntity) {
		super(entityMetamodel, mappedEntity);
	}

	DynamicMapEntityTuplizer(EntityMetamodel entityMetamodel, EntityBinding mappedEntity) {
		super(entityMetamodel, mappedEntity);
	}

	/**
	 * {@inheritDoc}
	 */
	public EntityMode getEntityMode() {
		return EntityMode.MAP;
	}

	private PropertyAccessor buildPropertyAccessor(Property mappedProperty) {
		if ( mappedProperty.isBackRef() ) {
			return mappedProperty.getPropertyAccessor(null);
		}
		else {
			return PropertyAccessorFactory.getDynamicMapPropertyAccessor();
		}
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
    protected Getter buildPropertyGetter(Property mappedProperty, PersistentClass mappedEntity) {
		return buildPropertyAccessor(mappedProperty).getGetter( null, mappedProperty.getName() );
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
    protected Setter buildPropertySetter(Property mappedProperty, PersistentClass mappedEntity) {
		return buildPropertyAccessor(mappedProperty).getSetter( null, mappedProperty.getName() );
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
    protected Instantiator buildInstantiator(PersistentClass mappingInfo) {
        return new DynamicMapInstantiator( mappingInfo );
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
    protected ProxyFactory buildProxyFactory(PersistentClass mappingInfo, Getter idGetter, Setter idSetter) {

		ProxyFactory pf = new MapProxyFactory();
		try {
			//TODO: design new lifecycle for ProxyFactory
			pf.postInstantiate(
					getEntityName(),
					null,
					null,
					null,
					null,
					null
			);
		}
		catch ( HibernateException he ) {
            LOG.unableToCreateProxyFactory(getEntityName(), he);
			pf = null;
		}
		return pf;
	}

	private PropertyAccessor buildPropertyAccessor(AttributeBinding mappedProperty) {
		// TODO: fix when backrefs are working in new metamodel
		//if ( mappedProperty.isBackRef() ) {
		//	return mappedProperty.getPropertyAccessor( null );
		//}
		//else {
			return PropertyAccessorFactory.getDynamicMapPropertyAccessor();
		//}
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected Getter buildPropertyGetter(AttributeBinding mappedProperty) {
		return buildPropertyAccessor( mappedProperty ).getGetter( null, mappedProperty.getAttribute().getName() );
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected Setter buildPropertySetter(AttributeBinding mappedProperty) {
		return buildPropertyAccessor( mappedProperty ).getSetter( null, mappedProperty.getAttribute().getName() );
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected Instantiator buildInstantiator(EntityBinding mappingInfo) {
		return new DynamicMapInstantiator( mappingInfo );
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected ProxyFactory buildProxyFactory(EntityBinding mappingInfo, Getter idGetter, Setter idSetter) {

		ProxyFactory pf = new MapProxyFactory();
		try {
			//TODO: design new lifecycle for ProxyFactory
			pf.postInstantiate(
					getEntityName(),
					null,
					null,
					null,
					null,
					null
			);
		}
		catch ( HibernateException he ) {
			LOG.unableToCreateProxyFactory(getEntityName(), he);
			pf = null;
		}
		return pf;
	}

	/**
	 * {@inheritDoc}
	 */
	public Class getMappedClass() {
		return Map.class;
	}

	/**
	 * {@inheritDoc}
	 */
	public Class getConcreteProxyClass() {
		return Map.class;
	}

	/**
	 * {@inheritDoc}
	 */
	public boolean isInstrumented() {
		return false;
	}

	/**
	 * {@inheritDoc}
	 */
	public EntityNameResolver[] getEntityNameResolvers() {
		return new EntityNameResolver[] { BasicEntityNameResolver.INSTANCE };
	}

	/**
	 * {@inheritDoc}
	 */
	public String determineConcreteSubclassEntityName(Object entityInstance, SessionFactoryImplementor factory) {
		return extractEmbeddedEntityName( ( Map ) entityInstance );
	}

	public static String extractEmbeddedEntityName(Map entity) {
		return ( String ) entity.get( DynamicMapInstantiator.KEY );
	}

	public static class BasicEntityNameResolver implements EntityNameResolver {
		public static final BasicEntityNameResolver INSTANCE = new BasicEntityNameResolver();

		/**
		 * {@inheritDoc}
		 */
		public String resolveEntityName(Object entity) {
			if ( ! Map.class.isInstance( entity ) ) {
				return null;
			}
			final String entityName = extractEmbeddedEntityName( ( Map ) entity );
			if ( entityName == null ) {
				throw new HibernateException( "Could not determine type of dynamic map entity" );
			}
			return entityName;
		}

		/**
		 * {@inheritDoc}
		 */
		@Override
        public boolean equals(Object obj) {
			return getClass().equals( obj.getClass() );
		}

		/**
		 * {@inheritDoc}
		 */
		@Override
        public int hashCode() {
			return getClass().hashCode();
		}
	}
}

Other Hibernate examples (source code examples)

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