1 /*
   2  * Copyright 2003 Sun Microsystems, Inc.  All Rights Reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  *
  23  */
  24 
  25 package sun.jvm.hotspot.debugger.cdbg;
  26 
  27 import java.util.*;
  28 import sun.jvm.hotspot.debugger.*;
  29 
  30 // a comparator used to sort LoadObjects by base address
  31 
  32 public class LoadObjectComparator implements Comparator {
  33    public int compare(Object o1, Object o2) {
  34       LoadObject lo1 = (LoadObject) o1;
  35       LoadObject lo2 = (LoadObject) o2;
  36       Address base1 = lo1.getBase();
  37       Address base2 = lo2.getBase();
  38       long diff = base1.minus(base2);
  39       return (diff == 0)? 0 : ((diff < 0)? -1 : +1);
  40    }
  41 
  42    public boolean equals(Object o) {
  43       if (o == null || !(o instanceof LoadObjectComparator)) {
  44          return false;
  45       }
  46       return true;
  47    }
  48 }