cdmlib-persistence/src/main/java/eu/etaxonomy/cdm/persistence/dao/hibernate/HibernateProxyHelperExtended.java

   1 /**
   2 * Copyright (C) 2009 EDIT
   3 * European Distributed Institute of Taxonomy
   4 * http://www.e-taxonomy.eu
   5 *
   6 * The contents of this file are subject to the Mozilla Public License Version 1.1
   7 * See LICENSE.TXT at the top of this package for the full license terms.
   8 */
   9
  10 package eu.etaxonomy.cdm.persistence.dao.hibernate;
  11
  12 import org.hibernate.envers.entities.mapper.relation.lazy.proxy.MapProxy;
  13 import org.hibernate.proxy.HibernateProxy;
  14 import org.hibernate.proxy.LazyInitializer;
  15
  16 import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;
  17 import eu.etaxonomy.cdm.model.common.CdmBase;
  18
  19 /**
  20  * TODO merge with {@link HibernateProxyHelper}
  21  *
  22  * This class extends the {@link org.hibernate.proxy.HibernateProxyHelper}.
  23  * Since {@link org.hibernate.proxy.HibernateProxyHelper} is final the {@link #getClassWithoutInitializingProxy(Object)}
  24  * is repeated here for convenience.
  25  *
  26  * @author a.kohlbecker
  27  */
  28 public class HibernateProxyHelperExtended {
  29
  30         /**
  31          * Get the class of an instance or the underlying class
  32          * of a proxy (without initializing the proxy!). It is
  33          * almost always better to use the entity name!
  34          *
  35          */
  36         public static Class getClassWithoutInitializingProxy(Object object) {
  37                 if (object instanceof HibernateProxy) {
  38                         HibernateProxy proxy = (HibernateProxy) object;
  39                         LazyInitializer li = proxy.getHibernateLazyInitializer();
  40                         return li.getPersistentClass();
  41                 }
  42                 else {
  43                         return object.getClass();
  44                 }
  45         }
  46
  47         /**
  48          * Unwrap the target instance from the proxy.
  49          */
  50         public static Object getProxyTarget(Object object){
  51                 if(object instanceof HibernateProxy) {
  52                         LazyInitializer lazyInitializer = ((HibernateProxy)object).getHibernateLazyInitializer();
  53                         return lazyInitializer.getImplementation();
  54                 } else {
  55                         return object;
  56                 }
  57         }
  58
  59 }