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/**
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* Copyright (C) 2009 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/ 
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package eu.etaxonomy.cdm.persistence.dao.hibernate;
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import org.hibernate.envers.entities.mapper.relation.lazy.proxy.MapProxy;
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import org.hibernate.proxy.HibernateProxy;
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import org.hibernate.proxy.LazyInitializer;
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import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;
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import eu.etaxonomy.cdm.model.common.CdmBase;
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/**
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 * TODO merge with {@link HibernateProxyHelper}
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 * 
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 * This class extends the {@link org.hibernate.proxy.HibernateProxyHelper}. 
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 * Since {@link org.hibernate.proxy.HibernateProxyHelper} is final the {@link #getClassWithoutInitializingProxy(Object)} 
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 * is repeated here for convenience.
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 * 
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 * @author a.kohlbecker
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 */
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public class HibernateProxyHelperExtended {
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	/**
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	 * Get the class of an instance or the underlying class
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	 * of a proxy (without initializing the proxy!). It is
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	 * almost always better to use the entity name!
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	 * 
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	 */
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	public static Class getClassWithoutInitializingProxy(Object object) {
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		if (object instanceof HibernateProxy) {
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			HibernateProxy proxy = (HibernateProxy) object;
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			LazyInitializer li = proxy.getHibernateLazyInitializer();
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			return li.getPersistentClass();
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		}
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		else {
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			return object.getClass();
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		}
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	}
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	/**
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	 * Unwrap the target instance from the proxy.
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	 */
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	public static Object getProxyTarget(Object object){
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		if(object instanceof HibernateProxy) {
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			LazyInitializer lazyInitializer = ((HibernateProxy)object).getHibernateLazyInitializer();
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			return lazyInitializer.getImplementation();
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		} else {
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			return object;
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		}
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	}
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}
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