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Java > Open Source Codes > org > netbeans > modules > java > codegen > 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 JavaDoc {
31     public int compare(java.lang.Object JavaDoc p1, java.lang.Object JavaDoc p2) {
32         if (p1 instanceof Integer JavaDoc) {
33             return comparePosToBinding((Integer JavaDoc)p1, (ElementBinding)p2);
34         } else if (p2 instanceof PositionRef) {
35             return -comparePosToBinding((Integer JavaDoc)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 JavaDoc 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 JavaDoc p1) {
54         return (p1 instanceof PositionComparator);
55     }
56 }
57
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