dynamicmapentitytuplizer.java

一个Java持久层类库

// $Id: DynamicMapEntityTuplizer.java 9210 2006-02-03 22:15:19Z steveebersole $
package org.hibernate.tuple.entity;

import java.util.Map;

import org.hibernate.EntityMode;
import org.hibernate.HibernateException;
import org.hibernate.tuple.entity.AbstractEntityTuplizer;
import org.hibernate.tuple.Instantiator;
import org.hibernate.tuple.DynamicMapInstantiator;
import org.hibernate.mapping.PersistentClass;
import org.hibernate.mapping.Property;
import org.hibernate.property.Getter;
import org.hibernate.property.PropertyAccessor;
import org.hibernate.property.PropertyAccessorFactory;
import org.hibernate.property.Setter;
import org.hibernate.proxy.map.MapProxyFactory;
import org.hibernate.proxy.ProxyFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

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

	static final Logger log = LoggerFactory.getLogger( DynamicMapEntityTuplizer.class );

	DynamicMapEntityTuplizer(EntityMetamodel entityMetamodel, PersistentClass mappedEntity) {
		super(entityMetamodel, mappedEntity);
	}
	
	public EntityMode getEntityMode() {
		return EntityMode.MAP;
	}

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

	protected Getter buildPropertyGetter(Property mappedProperty, PersistentClass mappedEntity) {
		return buildPropertyAccessor(mappedProperty).getGetter( null, mappedProperty.getName() );
	}

	protected Setter buildPropertySetter(Property mappedProperty, PersistentClass mappedEntity) {
		return buildPropertyAccessor(mappedProperty).getSetter( null, mappedProperty.getName() );
	}

	protected Instantiator buildInstantiator(PersistentClass mappingInfo) {
        return new DynamicMapInstantiator( mappingInfo );
	}

	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.warn( "could not create proxy factory for:" + getEntityName(), he );
			pf = null;
		}
		return pf;
	}

	public Class getMappedClass() {
		return Map.class;
	}

	public Class getConcreteProxyClass() {
		return Map.class;
	}

	public boolean isInstrumented() {
		return false;
	}
}