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.loader.collection;
26
27 import java.io.Serializable;
28 import java.util.Map;
29
30 import org.hibernate.HibernateException;
31 import org.hibernate.engine.SessionFactoryImplementor;
32 import org.hibernate.engine.SessionImplementor;
33 import org.hibernate.loader.OuterJoinLoader;
34 import org.hibernate.persister.collection.QueryableCollection;
35 import org.hibernate.type.Type;
36
37 /**
38 * Superclass for loaders that initialize collections
39 *
40 * @see OneToManyLoader
41 * @see BasicCollectionLoader
42 * @author Gavin King
43 */
44 public class CollectionLoader extends OuterJoinLoader implements CollectionInitializer {
45
46 private final QueryableCollection collectionPersister;
47
48 public CollectionLoader(QueryableCollection collectionPersister, SessionFactoryImplementor factory, Map enabledFilters) {
49 super( factory, enabledFilters );
50 this.collectionPersister = collectionPersister;
51 }
52
53 protected boolean isSubselectLoadingEnabled() {
54 return hasSubselectLoadableCollections();
55 }
56
57 public void initialize(Serializable id, SessionImplementor session)
58 throws HibernateException {
59 loadCollection( session, id, getKeyType() );
60 }
61
62 protected Type getKeyType() {
63 return collectionPersister.getKeyType();
64 }
65
66 public String toString() {
67 return getClass().getName() + '(' + collectionPersister.getRole() + ')';
68 }
69 }
Save This Page