| OffsetComparator.java |
1 /*
2 * Copyright (c) 1998-2004, The University of Sheffield.
3 *
4 * This file is part of GATE (see http://gate.ac.uk/), and is free
5 * software, licenced under the GNU Library General Public License,
6 * Version 2, June 1991 (in the distribution as file licence.html,
7 * and also available at http://gate.ac.uk/gate/licence.html).
8 *
9 * Valentin Tablan 02/10/2001
10 *
11 * $Id: OffsetComparator.java,v 1.5 2004/07/21 17:10:09 akshay Exp $
12 *
13 */
14 package gate.util;
15
16 import java.util.Comparator;
17
18 import gate.Annotation;
19
20 /**
21 * Compares annotations by start offset
22 */
23 public class OffsetComparator implements Comparator {
24
25 public int compare(Object o1, Object o2){
26 Annotation a1 = (Annotation)o1;
27 Annotation a2 = (Annotation)o2;
28 int result;
29
30 // compare start offsets
31 result = a1.getStartNode().getOffset().compareTo(
32 a2.getStartNode().getOffset());
33
34 // if start offsets are equal compare end offsets
35 if(result == 0) {
36 result = a1.getEndNode().getOffset().compareTo(
37 a2.getEndNode().getOffset());
38 } // if
39
40 return result;
41 }
42 }