1 /*
2 * Hibernate, Relational Persistence for Idiomatic Java
3 *
4 * Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
5 * indicated by the @author tags or express copyright attribution
6 * statements applied by the authors. All third-party contributions are
7 * distributed under license by Red Hat Middleware LLC.
8 *
9 * This copyrighted material is made available to anyone wishing to use, modify,
10 * copy, or redistribute it subject to the terms and conditions of the GNU
11 * Lesser General Public License, as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
16 * for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public License
19 * along with this distribution; if not, write to:
20 * Free Software Foundation, Inc.
21 * 51 Franklin Street, Fifth Floor
22 * Boston, MA 02110-1301 USA
23 *
24 */
25 package org.hibernate.event.def;
26
27 import java.util.Map;
28
29 import org.slf4j.Logger;
30 import org.slf4j.LoggerFactory;
31 import org.hibernate.HibernateException;
32 import org.hibernate.ObjectDeletedException;
33 import org.hibernate.PersistentObjectException;
34 import org.hibernate.engine.CascadingAction;
35 import org.hibernate.event.EventSource;
36 import org.hibernate.event.PersistEvent;
37 import org.hibernate.event.PersistEventListener;
38 import org.hibernate.engine.SessionImplementor;
39 import org.hibernate.persister.entity.EntityPersister;
40 import org.hibernate.proxy.HibernateProxy;
41 import org.hibernate.proxy.LazyInitializer;
42 import org.hibernate.util.IdentityMap;
43
44 /**
45 * Defines the default create event listener used by hibernate for creating
46 * transient entities in response to generated create events.
47 *
48 * @author Gavin King
49 */
50 public class DefaultPersistEventListener extends AbstractSaveEventListener implements PersistEventListener {
51
52 private static final Logger log = LoggerFactory.getLogger(DefaultPersistEventListener.class);
53
54 /**
55 * Handle the given create event.
56 *
57 * @param event The create event to be handled.
58 * @throws HibernateException
59 */
60 public void onPersist(PersistEvent event) throws HibernateException {
61 onPersist( event, IdentityMap.instantiate(10) );
62 }
63
64
65 /**
66 * Handle the given create event.
67 *
68 * @param event The create event to be handled.
69 * @throws HibernateException
70 */
71 public void onPersist(PersistEvent event, Map createCache) throws HibernateException {
72
73 final SessionImplementor source = event.getSession();
74 final Object object = event.getObject();
75
76 final Object entity;
77 if (object instanceof HibernateProxy) {
78 LazyInitializer li = ( (HibernateProxy) object ).getHibernateLazyInitializer();
79 if ( li.isUninitialized() ) {
80 if ( li.getSession()==source ) {
81 return; //NOTE EARLY EXIT!
82 }
83 else {
84 throw new PersistentObjectException("uninitialized proxy passed to persist()");
85 }
86 }
87 entity = li.getImplementation();
88 }
89 else {
90 entity = object;
91 }
92
93 int entityState = getEntityState(
94 entity,
95 event.getEntityName(),
96 source.getPersistenceContext().getEntry(entity),
97 source
98 );
99
100 switch (entityState) {
101 case DETACHED:
102 throw new PersistentObjectException(
103 "detached entity passed to persist: " +
104 getLoggableName( event.getEntityName(), entity )
105 );
106 case PERSISTENT:
107 entityIsPersistent(event, createCache);
108 break;
109 case TRANSIENT:
110 entityIsTransient(event, createCache);
111 break;
112 default:
113 throw new ObjectDeletedException(
114 "deleted entity passed to persist",
115 null,
116 getLoggableName( event.getEntityName(), entity )
117 );
118 }
119
120 }
121
122 protected void entityIsPersistent(PersistEvent event, Map createCache) {
123 log.trace("ignoring persistent instance");
124 final EventSource source = event.getSession();
125
126 //TODO: check that entry.getIdentifier().equals(requestedId)
127
128 final Object entity = source.getPersistenceContext().unproxy( event.getObject() );
129 final EntityPersister persister = source.getEntityPersister( event.getEntityName(), entity );
130
131 if ( createCache.put(entity, entity)==null ) {
132 //TODO: merge into one method!
133 cascadeBeforeSave(source, persister, entity, createCache);
134 cascadeAfterSave(source, persister, entity, createCache);
135 }
136
137 }
138
139 /**
140 * Handle the given create event.
141 *
142 * @param event The save event to be handled.
143 * @throws HibernateException
144 */
145 protected void entityIsTransient(PersistEvent event, Map createCache) throws HibernateException {
146
147 log.trace("saving transient instance");
148
149 final EventSource source = event.getSession();
150
151 final Object entity = source.getPersistenceContext().unproxy( event.getObject() );
152
153 if ( createCache.put(entity, entity)==null ) {
154 saveWithGeneratedId( entity, event.getEntityName(), createCache, source, false );
155 }
156
157 }
158
159 protected CascadingAction getCascadeAction() {
160 return CascadingAction.PERSIST;
161 }
162
163 protected Boolean getAssumedUnsaved() {
164 return Boolean.TRUE;
165 }
166
167 }
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