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comparison agent/src/share/classes/sun/jvm/hotspot/utilities/LivenessPathElement.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2001 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.utilities;
26
27 import sun.jvm.hotspot.oops.*;
28
29 /** Describes an element in a {@link
30 sun.jvm.hotspot.utilities.LivenessPath}. It indicates that the
31 field in the given object leads to the next element in the
32 path. Root elements do not have an object; the terminal element in
33 the path does not have a field identifier. */
34
35 public class LivenessPathElement {
36 LivenessPathElement(Oop obj, FieldIdentifier id) {
37 this.obj = obj;
38 this.id = id;
39 }
40
41 public boolean isRoot() {
42 return (obj == null);
43 }
44
45 public boolean isTerminal() {
46 return (id == null);
47 }
48
49 public Oop getObj() {
50 return obj;
51 }
52
53 public FieldIdentifier getField() {
54 return id;
55 }
56
57 //---------------------------------------------------------------------------
58 // Internals only below this point
59 //
60 private Oop obj;
61 private FieldIdentifier id;
62 }