SequenceID


1   /**
2    * All content copyright (c) 2003-2006 Terracotta, Inc., except as may otherwise be noted in a separate copyright notice.  All rights reserved.
3    */
4   package com.tc.util;
5   
6   import java.util.Comparator  ;
7   
8   
9   public class SequenceID extends AbstractIdentifier {
10  
11    public static final SequenceID NULL_ID = new SequenceID();
12    public static final Comparator            COMPARATOR = new Comparator  () {
13                                                         public int compare(Object   o1, Object   o2) {
14                                                           long l1 = ((SequenceID) o1).toLong();
15                                                           long l2 = ((SequenceID) o2).toLong();
16                                                           if (l1 < l2) return -1;
17                                                           else if (l1 > l2) return 1;
18                                                           else return 0;
19                                                         }
20                                                       };
21  
22    public SequenceID(long l) {
23      super(l);
24    }
25  
26    private SequenceID() {
27      return;
28    }
29  
30    public String   getIdentifierType() {
31      return "SequenceID";
32    }
33    
34    public SequenceID next() {
35      return new SequenceID(toLong() + 1);
36    }
37  
38  }
39
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