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1
6 package javax.jdo;
7
8 import java.util.StringTokenizer  ;
9
10
13 public class StringIdentity extends SingleFieldIdentity {
14
15 public StringIdentity(Class pcClass, String key) {
16 super(pcClass);
17 if (key == null) {
18 throw new NullPointerException (
19 "key value passed to StringIdentity is null");
20 } else {
21 StringTokenizer token = new StringTokenizer (key, "::");
22 this.key = token.nextToken();
23 return;
24 }
25 }
26
27 public String getKey() {
28 return key;
29 }
30
31 public int hashCode() {
32 return key.hashCode() ^ targetClassName.hashCode();
33 }
34
35 public boolean equals(Object obj) {
36 if (obj == this)
37 return true;
38 if (!(obj instanceof StringIdentity)) {
39 return false;
40 } else {
41 StringIdentity other = (StringIdentity) obj;
42 return key.equals(other.key)
43 && targetClassName.equals(other.targetClassName);
44 }
45 }
46
47 public String toString() {
48 return "" + key + "::" + targetClassName;
49 }
50
51 private final String key;
52 }
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Java API By Example, From Geeks To Geeks.