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1
8
9 package com.sleepycat.persist.impl;
10
11 import java.util.HashMap  ;
12 import java.util.Map ;
13 import java.util.TreeMap ;
14
15 import com.sleepycat.persist.model.Persistent;
16 import com.sleepycat.persist.model.PersistentProxy;
17
18
23 @Persistent
24 abstract class MapProxy<K,V> implements PersistentProxy<Map <K,V>> {
25
26 private K[] keys;
27 private V[] values;
28
29 protected MapProxy() {}
30
31 public final void initializeProxy(Map <K,V> map) {
32 int size = map.size();
33 keys = (K[]) new Object [size];
34 values = (V[]) new Object [size];
35 int i = 0;
36 for (Map.Entry <K,V> entry : map.entrySet()) {
37 keys[i] = entry.getKey();
38 values[i] = entry.getValue();
39 i += 1;
40 }
41 }
42
43 public final Map <K,V> convertProxy() {
44 int size = values.length;
45 Map <K,V> map = newInstance(size);
46 for (int i = 0; i < size; i += 1) {
47 map.put(keys[i], values[i]);
48 }
49 return map;
50 }
51
52 protected abstract Map <K,V> newInstance(int size);
53
54 @Persistent(proxyFor=HashMap .class)
55 static class HashMapProxy<K,V> extends MapProxy<K,V> {
56
57 protected HashMapProxy() {}
58
59 protected Map <K,V> newInstance(int size) {
60 return new HashMap <K,V>(size);
61 }
62 }
63
64 @Persistent(proxyFor=TreeMap .class)
65 static class TreeMapProxy<K,V> extends MapProxy<K,V> {
66
67 protected TreeMapProxy() {}
68
69 protected Map <K,V> newInstance(int size) {
70 return new TreeMap <K,V>();
71 }
72 }
73 }
74 |
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