IdentityKey


1   package polyglot.util;
2   
3   /**
4    * Class to be used for inserting objects in hashtables using pointer equality.
5    */
6   public class IdentityKey
7   {
8       Object   obj;
9   
10      public IdentityKey(Object   obj) {
11          this.obj = obj;
12      }
13  
14      public Object   object() {
15          return obj;
16      }
17  
18      public int hashCode() {
19          return System.identityHashCode(obj);
20      }
21  
22      public boolean equals(Object   other) {
23          return other instanceof IdentityKey
24              && ((IdentityKey) other).obj == obj;
25      }
26  
27      public String   toString() {
28          return "Id(" + obj + ")";
29      }
30  }
31  
32

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