EDIT

/**

* Copyright (C) 2007 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.hibernate;

import java.io.Serializable;

import org.apache.log4j.Logger;

import org.hibernate.proxy.HibernateProxy;

import org.hibernate.proxy.LazyInitializer;

/**

 * @author a.mueller

 * @created 03.03.2009

 * @version 1.0

 */

public class HibernateProxyHelper {

	@SuppressWarnings("unused")

	private static final Logger logger = Logger.getLogger(HibernateProxyHelper.class);

	// ************************** Hibernate proxies *******************/

	/* (non-Javadoc)

	 * @see eu.etaxonomy.cdm.model.common.IProxyHelper#deproxy(java.lang.Object, java.lang.Class)

	 */

	 public static <T> T deproxy(Object object, Class<T> clazz) throws ClassCastException {

	     if (object instanceof HibernateProxy) {

	         return clazz.cast(((HibernateProxy) object).getHibernateLazyInitializer().getImplementation());

	     } else {

	         return clazz.cast(object);

	     }

	 }

		/**

		 * Unwrap the target instance from the proxy.

		 */

		public static Object deproxy(Object object){

			if(object instanceof HibernateProxy) {

				LazyInitializer lazyInitializer = ((HibernateProxy)object).getHibernateLazyInitializer();

				return lazyInitializer.getImplementation();

			} else {

				return object;

			}

		}

	public static boolean isInstanceOf(Object object, Class clazz) throws ClassCastException {

	     if (clazz == null){

	    	 return false;

	     }

		 if (object instanceof HibernateProxy) {

	    	 Object impl =  ((HibernateProxy) object).getHibernateLazyInitializer().getImplementation();

	         Class<?> implClass = impl.getClass();

	         return clazz.isAssignableFrom(implClass);

	     } else {

	         return clazz.isAssignableFrom(object.getClass());

	     }

	 }

	public static Serializable getIdentifierOf(Object object) {

        if (object instanceof HibernateProxy) {

            return  ((HibernateProxy) object).getHibernateLazyInitializer().getIdentifier();

        } else {

            throw new ClassCastException("Cannot cast the given Object to a known Hibernate proxy.");

        }

    }

	/**

	 * Get the class of an instance or the underlying class

	 * of a proxy (without initializing the proxy!). It is

	 * almost always better to use the entity name!

	 *

	 * delegates calls to {@link org.hibernate.proxy.HibernateProxyHelper}

	 */

	public static Class getClassWithoutInitializingProxy(Object object) {

		return org.hibernate.proxy.HibernateProxyHelper.getClassWithoutInitializingProxy(object);

	}

}