IgnoreWhiteSpaceComparator


1   /*******************************************************************************
2    * Copyright (c) 2000, 2005 IBM Corporation and others.
3    * All rights reserved. This program and the accompanying materials
4    * are made available under the terms of the Eclipse Public License v1.0
5    * which accompanies this distribution, and is available at
6    * http://www.eclipse.org/legal/epl-v10.html
7    * 
8    * Contributors:
9    *     IBM Corporation - initial API and implementation
10   *******************************************************************************/
11  package org.eclipse.ui.externaltools.internal.launchConfigurations;
12  
13  import java.util.Comparator  ;
14  
15  public class IgnoreWhiteSpaceComparator implements Comparator   {
16  
17      /* (non-Javadoc)
18       * @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
19       */
20      public int compare(Object   o1, Object   o2) {
21          String   one= (String  )o1;
22          String   two= (String  )o2;
23          int i1 = 0;
24          int i2 = 0;
25          int l1 = one.length();
26          int l2 = two.length();
27          char ch1 = ' ';
28          char ch2 = ' ';
29          while (i1 < l1 && i2 < l2) {
30              while (i1 < l1 && Character.isWhitespace(ch1 = one.charAt(i1))) {
31                  i1++;
32              }
33              while (i2 < l2 && Character.isWhitespace(ch2 = two.charAt(i2))) {
34                  i2++;
35              }
36              if (i1 == l1 && i2 == l2) {
37                  return 0;
38              }
39              if (ch1 != ch2) {
40                  return -1;
41              }           
42              i1++;
43              i2++;
44          }
45          return 0;
46      }
47  }
48

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