PositionComparator


1   /*
2    * The contents of this file are subject to the terms of the Common Development
3    * and Distribution License (the License). You may not use this file except in
4    * compliance with the License.
5    *
6    * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7    * or http://www.netbeans.org/cddl.txt.
8    *
9    * When distributing Covered Code, include this CDDL Header Notice in each file
10   * and include the License file at http://www.netbeans.org/cddl.txt.
11   * If applicable, add the following below the CDDL Header, with the fields
12   * enclosed by brackets [] replaced by your own identifying information:
13   * "Portions Copyrighted [year] [name of copyright owner]"
14   *
15   * The Original Software is NetBeans. The Initial Developer of the Original
16   * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
17   * Microsystems, Inc. All Rights Reserved.
18   */
19  
20  package org.netbeans.modules.java.codegen;
21  
22  import org.openide.text.PositionRef;
23  import org.openide.text.PositionBounds;
24  /**
25   * Helps with sorting elements according to their positions.
26   *
27   * @author  Svatopluk Dedic <mailto:sdedic@netbeans.org>
28   * @version 0.1
29   */
30  class PositionComparator implements java.util.Comparator   {
31      public int compare(java.lang.Object   p1, java.lang.Object   p2) {
32          if (p1 instanceof Integer  ) {
33              return comparePosToBinding((Integer  )p1, (ElementBinding)p2);
34          } else if (p2 instanceof PositionRef) {
35              return -comparePosToBinding((Integer  )p2, (ElementBinding)p1);
36          }
37          ElementBinding b1 = (ElementBinding)p1;
38          ElementBinding b2 = (ElementBinding)p2;
39          
40          return b1.wholeBounds.getBegin().getOffset() -
41                 b2.wholeBounds.getBegin().getOffset();
42      }
43      
44      private int comparePosToBinding(Integer   iPos, ElementBinding b) {
45          int off = iPos.intValue();
46          PositionBounds w = b.wholeBounds;
47          if (w.getBegin().getOffset() <= off &&
48              w.getEnd().getOffset() > off)
49              return 0;
50          return off - w.getBegin().getOffset();
51      }
52      
53      public boolean equals(java.lang.Object   p1) {
54          return (p1 instanceof PositionComparator);
55      }
56  }
57
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