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1   /*
2    * Copyright (c) 2000, 2002, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20   * or visit www.oracle.com if you need additional information or have any
21   * questions.
22   *
23   */
24  
25  package sun.jvm.hotspot.runtime;
26  
27  import sun.jvm.hotspot.debugger.*;
28  import sun.jvm.hotspot.types.*;
29  
30  /** This is a base class for all VM runtime objects which wrap
31      Addresses. The rationale is that without this in place, every
32      class would have to implement equals() and hashCode() with
33      boilerplate code, a practice which is inherently error-prone. */
34  
35  public class VMObject {
36    protected Address addr;
37  
38    /** All of the objects have this as their constructor's signature
39        anyway */
40    public VMObject(Address addr) {
41      this.addr = addr;
42    }
43  
44    public String toString() {
45      return getClass().getName() + "@" + addr;
46    }
47  
48    public boolean equals(Object arg) {
49      if (arg == null) {
50        return false;
51      }
52  
53      if (!getClass().equals(arg.getClass())) {
54        return false;
55      }
56  
57      VMObject obj = (VMObject) arg;
58      if (!addr.equals(obj.addr)) {
59        return false;
60      }
61  
62      return true;
63    }
64  
65    public int hashCode() {
66      return addr.hashCode();
67    }
68  
69    public Address getAddress() {
70      return addr;
71    }
72  }