|
1 package org.hibernate.type;
3
4 import java.io.Serializable  ;
5 import java.util.HashMap ;
6 import java.util.Iterator ;
7 import java.util.Map ;
8
9 import org.dom4j.Element;
10 import org.hibernate.EntityMode;
11 import org.hibernate.HibernateException;
12 import org.hibernate.collection.PersistentCollection;
13 import org.hibernate.collection.PersistentMap;
14 import org.hibernate.collection.PersistentMapElementHolder;
15 import org.hibernate.engine.SessionImplementor;
16 import org.hibernate.persister.collection.CollectionPersister;
17
18
19 public class MapType extends CollectionType {
20
21 public MapType(String role, String propertyRef, boolean isEmbeddedInXML) {
22 super(role, propertyRef, isEmbeddedInXML);
23 }
24
25 public PersistentCollection instantiate(SessionImplementor session, CollectionPersister persister, Serializable key) {
26 if ( session.getEntityMode()==EntityMode.DOM4J ) {
27 return new PersistentMapElementHolder(session, persister, key);
28 }
29 else {
30 return new PersistentMap(session);
31 }
32 }
33
34 public Class getReturnedClass() {
35 return Map .class;
36 }
37
38 public Iterator getElementsIterator(Object collection) {
39 return ( (java.util.Map ) collection ).values().iterator();
40 }
41
42 public PersistentCollection wrap(SessionImplementor session, Object collection) {
43 if ( session.getEntityMode()==EntityMode.DOM4J ) {
44 return new PersistentMapElementHolder( session, (Element) collection );
45 }
46 else {
47 return new PersistentMap( session, (java.util.Map ) collection );
48 }
49 }
50
51 public Object instantiate(Object original) {
52 return new HashMap ();
53 }
54
55 public Object replaceElements(
56 final Object original,
57 final Object target,
58 final Object owner,
59 final java.util.Map copyCache,
60 final SessionImplementor session)
61 throws HibernateException {
62
63 CollectionPersister cp = session.getFactory().getCollectionPersister( getRole() );
64
65 java.util.Map result = (java.util.Map ) target;
66 result.clear();
67
68 Iterator iter = ( (java.util.Map ) original ).entrySet().iterator();
69 while ( iter.hasNext() ) {
70 java.util.Map.Entry me = (java.util.Map.Entry) iter.next();
71 Object key = cp.getIndexType().replace( me.getKey(), null, session, owner, copyCache );
72 Object value = cp.getElementType().replace( me.getValue(), null, session, owner, copyCache );
73 result.put(key, value);
74 }
75
76 return result;
77
78 }
79
80 public Object indexOf(Object collection, Object element) {
81 Iterator iter = ( (Map ) collection ).entrySet().iterator();
82 while ( iter.hasNext() ) {
83 Map.Entry me = (Map.Entry ) iter.next();
84 if ( me.getValue()==element ) return me.getKey();
86 }
87 return null;
88 }
89
90 }
91 |
Popular Tags |
Java API By Example, From Geeks To Geeks.