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12 package com.versant.core.jdo.sco.detached;
13
14 import com.versant.core.jdo.VersantStateManager;
15 import com.versant.core.common.VersantFieldMetaData;
16 import com.versant.core.jdo.sco.VersantSimpleSCO;
17 import com.versant.core.jdo.sco.MapData;
18 import com.versant.core.jdo.VersantStateManager;
19
20 import javax.jdo.spi.PersistenceCapable;
21 import java.io.Serializable  ;
22 import java.util.Hashtable ;
23 import java.util.Map ;
24
25 public class DetachSCOHashtable extends Hashtable implements Serializable , VersantSimpleSCO {
26
27 private PersistenceCapable owner;
28 private VersantStateManager stateManager;
29 private int fieldNo;
30
31 private DetachSCOHashtable(PersistenceCapable owner,
32 VersantFieldMetaData fmd) {
33 this.owner = owner;
34 this.fieldNo = fmd.getManagedFieldNo();
35 }
36
37 public DetachSCOHashtable(PersistenceCapable owner, VersantStateManager stateManager,
38 VersantFieldMetaData fmd, Map beforeMap) {
39 this(owner, fmd);
40 putAll(beforeMap);
41 this.stateManager = stateManager;
42 }
43
44 public DetachSCOHashtable(PersistenceCapable owner, VersantStateManager stateManager,
45 VersantFieldMetaData fmd, MapData mapData) {
46 this(owner, fmd);
47 int n = mapData.entryCount;
48 Object [] keys = mapData.keys;
49 Object [] values = mapData.values;
50 for (int i = 0; i < n; i++) {
51 put(keys[i], values[i]);
52 }
53 this.stateManager = stateManager;
54 }
55
56 public Object put(Object key, Object value) {
57 makeDirty();
58 return super.put(key, value);
59 }
60
61 public Object remove(Object key) {
62 return checkModified(super.remove(key));
63 }
64
65 public void putAll(Map t) {
66 makeDirty();
67 super.putAll(t);
68 }
69
70 public void clear() {
71 final int size = size();
72 super.clear();
73 if (size != 0) makeDirty();
74 }
75
76 private void makeDirty() {
77 if (stateManager != null && owner != null) {
78 stateManager.makeDirty(owner, fieldNo);
79 }
80 }
81
82 private Object checkModified(Object obj) {
83 if (obj != null) {
84 makeDirty();
85 }
86 return obj;
87 }
88
89 public void makeTransient() {
90 owner = null;
91 stateManager = null;
92 }
93 }
94 |
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