1/*
2 * Copyright (c) 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
25package sun.jvm.hotspot.ui.tree;
26
27import java.util.*;
28import java.io.*;
29import sun.jvm.hotspot.oops.*;
30import sun.jvm.hotspot.debugger.*;
31import sun.jvm.hotspot.runtime.*;
32import sun.jvm.hotspot.utilities.*;
33
34/** Who directly points to this node. */
35
36public class RevPtrsTreeNodeAdapter extends FieldTreeNodeAdapter {
37  private static FieldIdentifier fid = new NamedFieldIdentifier("_revPtrs");
38
39  private List children;
40
41  public RevPtrsTreeNodeAdapter(Oop oop) {
42    this(oop, false);
43  }
44
45  public RevPtrsTreeNodeAdapter(Oop oop, boolean treeTableMode) {
46    super(fid, treeTableMode);
47    children = VM.getVM().getRevPtrs().get(oop);
48  }
49
50  public int getChildCount() {
51    return children != null ? children.size() : 0;
52  }
53
54  public SimpleTreeNode getChild(int index) {
55    LivenessPathElement lpe = (LivenessPathElement)children.get(index);
56    IndexableFieldIdentifier ifid = new IndexableFieldIdentifier(index);
57    Oop oop = lpe.getObj();
58    if (oop != null) {
59      return new OopTreeNodeAdapter(oop, ifid, getTreeTableMode());
60    } else {
61      NamedFieldIdentifier nfi = (NamedFieldIdentifier)lpe.getField();
62      return new RootTreeNodeAdapter(nfi.getName(), ifid, getTreeTableMode());
63    }
64  }
65
66  public boolean isLeaf() {
67    return false;
68  }
69
70  public int getIndexOfChild(SimpleTreeNode child) {
71    FieldIdentifier id = ((FieldTreeNodeAdapter) child).getID();
72    IndexableFieldIdentifier ifid = (IndexableFieldIdentifier)id;
73    return ifid.getIndex();
74  }
75
76  public String getName()  { return "<<Reverse pointers>>"; }
77  public String getValue() { return ""; }
78}
79