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1
30 package com.genimen.djeneric.repository;
31
32 import java.lang.ref.SoftReference  ;
33 import java.util.Hashtable ;
34
35 import com.genimen.djeneric.repository.exceptions.DjenericException;
36
37 public class DjObjectCache
38 {
39 protected Hashtable objectTable = null;
40
41 public DjObjectCache()
42 {
43 objectTable = new Hashtable ();
44 }
45
46 public void clear()
47 {
48 objectTable.clear();
49 }
50
51 public void cache(DjObject obj) throws DjenericException
52 {
53 if ((obj != null))
54 {
55 SoftReference ref = new SoftReference (obj);
56 objectTable.put(new Long (obj.getObjectId()), ref);
57 }
58 }
59
60 public DjObject lookup(long objectId)
61 {
62 return lookup(new Long (objectId));
63 }
64
65 public DjObject lookup(Long objectId)
66 {
67 DjObject obj = null;
68 SoftReference ref = (SoftReference ) objectTable.get(objectId);
69 if (ref != null)
70 {
71 obj = (DjObject) ref.get();
72 }
73 return obj;
74 }
75
76 public void remove(long objectId)
77 {
78 remove(new Long (objectId));
79 }
80
81 public void remove(Long objectId)
82 {
83 objectTable.remove(objectId);
84 }
85
86 public void remove(DjObject obj) throws DjenericException
87 {
88 remove(obj.getObjectId());
89 }
90
91 } |
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