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1 package com.ibm.icu.impl;
2
3 import java.lang.ref.SoftReference  ;
4 import java.util.Collections ;
5 import java.util.HashMap ;
6 import java.util.Map ;
7
8 public class SimpleCache implements ICUCache {
9
10 public Object get(Object key) {
11 SoftReference ref = cacheRef;
12 if (ref != null) {
13 Map map = (Map )ref.get();
14 if (map != null) {
15 return map.get(key);
16 }
17 }
18 return null;
19 }
20
21 public void put(Object key, Object value) {
22 SoftReference ref = cacheRef;
23 Map map = null;
24 if (ref != null) {
25 map = (Map )ref.get();
26 }
27 if (map == null) {
28 map = Collections.synchronizedMap(new HashMap ());
29 ref = new SoftReference (map);
30 cacheRef = ref;
31 }
32 map.put(key, value);
33 }
34
35 public void clear() {
36 cacheRef = null;
37 }
38
39 private SoftReference cacheRef = null;
40 }
41 |
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