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Java > Open Source Codes > org > hibernate > loader > collection > OneToManyLoader


1 //$Id: OneToManyLoader.java,v 1.10 2005/06/13 20:10:20 oneovthafew Exp $
2 package org.hibernate.loader.collection;
3
4 import java.util.Map JavaDoc;
5
6 import org.apache.commons.logging.Log;
7 import org.apache.commons.logging.LogFactory;
8 import org.hibernate.MappingException;
9 import org.hibernate.engine.SessionFactoryImplementor;
10 import org.hibernate.loader.JoinWalker;
11 import org.hibernate.persister.collection.QueryableCollection;
12
13 /**
14  * Loads one-to-many associations<br>
15  * <br>
16  * The collection persister must implement <tt>QueryableCOllection<tt>. For
17  * other collections, create a customized subclass of <tt>Loader</tt>.
18  *
19  * @see BasicCollectionLoader
20  * @author Gavin King
21  */
22 public class OneToManyLoader extends CollectionLoader {
23
24     private static final Log log = LogFactory.getLog(OneToManyLoader.class);
25
26     public OneToManyLoader(
27             QueryableCollection oneToManyPersister,
28             SessionFactoryImplementor session,
29             Map JavaDoc enabledFilters)
30     throws MappingException {
31         this(oneToManyPersister, 1, session, enabledFilters);
32     }
33
34     public OneToManyLoader(
35             QueryableCollection oneToManyPersister,
36             int batchSize,
37             SessionFactoryImplementor factory,
38             Map JavaDoc enabledFilters)
39     throws MappingException {
40         this(oneToManyPersister, batchSize, null, factory, enabledFilters);
41     }
42
43     public OneToManyLoader(
44             QueryableCollection oneToManyPersister,
45             int batchSize,
46             String JavaDoc subquery,
47             SessionFactoryImplementor factory,
48             Map JavaDoc enabledFilters)
49     throws MappingException {
50
51         super(oneToManyPersister, factory, enabledFilters);
52         
53         JoinWalker walker = new OneToManyJoinWalker(
54                 oneToManyPersister,
55                 batchSize,
56                 subquery,
57                 factory,
58                 enabledFilters
59             );
60         initFromWalker( walker );
61
62         postInstantiate();
63
64         log.debug( "Static select for one-to-many " + oneToManyPersister.getRole() + ": " + getSQLString() );
65     }
66
67 }
68
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