|
1 package org.enhydra.shark.utilities;
2
3 import java.util.HashMap  ;
4 import java.util.Iterator ;
5 import java.util.Map ;
6
7 public class SizeLimitedToolAgentMap extends HashMap {
8
9 private int maximumSize = Integer.MAX_VALUE-1;
10
11 public SizeLimitedToolAgentMap() {
12 super();
13 System.out.println("Tool agent map created, maximum number of mappings is "+maximumSize);
14 }
15
16 public SizeLimitedToolAgentMap (int maxSize) {
17 this();
18 if (maxSize<0) {
19 maximumSize=Integer.MAX_VALUE-1;
20 } else {
21 maximumSize = maxSize;
22 }
23 System.out.println("Tool agent map created, maximum number of mappings is "+maximumSize);
24 }
25
26 public SizeLimitedToolAgentMap (int initialCapacity, float loadFactor) {
27 super(initialCapacity, loadFactor);
28 System.out.println("Tool agent map created, maximum number of mappings is "+maximumSize);
29 }
30
31 public SizeLimitedToolAgentMap (int initialCapacity, float loadFactor, int maxSize) {
32 this(initialCapacity, loadFactor);
33 maximumSize = maxSize;
34 System.out.println("Tool agent map created, maximum number of mappings is "+maximumSize);
35 }
36
37 public SizeLimitedToolAgentMap (Map m) {
38 maximumSize = m.size()+1;
39 putAll(m);
40 System.out.println("Tool agent map created, maximum number of mappings is "+maximumSize);
41 }
42
43 public synchronized Object put( Object key, Object value ) {
44 int mapSize = size();
45
46 if (mapSize >= maximumSize) {
47 System.err.println("Tool agent map can't accept more mappings - the maximum no. of mappings is "+maximumSize+" !");
48 return null;
49 } else {
50 System.out.println("New mapping added to tool agent map, tool agent map currently has "+(mapSize+1)+" mappings !");
51 return super.put(key,value);
52 }
53 }
54
55 public synchronized void putAll(Map t) {
56 Iterator iter = t.entrySet().iterator();
57 while(iter.hasNext()) {
58 Map.Entry entry = (Map.Entry )iter.next();
59 this.put(entry.getKey(), entry.getValue());
60 }
61 }
62
63 public synchronized Object remove (Object key) {
64 return super.remove(key);
65 }
66
67 public int getMaximumSize() {
68 return maximumSize;
69 }
70
71 }
72 |
Popular Tags |
Java API By Example, From Geeks To Geeks.