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1 /*
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2 * Copyright 2002 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.ui.tree;
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26
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27 import java.util.*;
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28 import java.io.*;
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29 import sun.jvm.hotspot.oops.*;
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30 import sun.jvm.hotspot.debugger.*;
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31 import sun.jvm.hotspot.runtime.*;
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32 import sun.jvm.hotspot.utilities.*;
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33
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34 /** Who directly points to this node. */
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35
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36 public class RevPtrsTreeNodeAdapter extends FieldTreeNodeAdapter {
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37 private static FieldIdentifier fid = new NamedFieldIdentifier("_revPtrs");
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38
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39 private List children;
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40
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41 public RevPtrsTreeNodeAdapter(Oop oop) {
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42 this(oop, false);
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43 }
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44
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45 public RevPtrsTreeNodeAdapter(Oop oop, boolean treeTableMode) {
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46 super(fid, treeTableMode);
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47 children = VM.getVM().getRevPtrs().get(oop);
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48 }
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49
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50 public int getChildCount() {
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51 return children != null ? children.size() : 0;
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52 }
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53
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54 public SimpleTreeNode getChild(int index) {
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55 LivenessPathElement lpe = (LivenessPathElement)children.get(index);
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56 IndexableFieldIdentifier ifid = new IndexableFieldIdentifier(index);
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57 Oop oop = lpe.getObj();
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58 if (oop != null) {
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59 return new OopTreeNodeAdapter(oop, ifid, getTreeTableMode());
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60 } else {
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61 NamedFieldIdentifier nfi = (NamedFieldIdentifier)lpe.getField();
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62 return new RootTreeNodeAdapter(nfi.getName(), ifid, getTreeTableMode());
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63 }
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64 }
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65
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66 public boolean isLeaf() {
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67 return false;
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68 }
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69
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70 public int getIndexOfChild(SimpleTreeNode child) {
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71 FieldIdentifier id = ((FieldTreeNodeAdapter) child).getID();
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72 IndexableFieldIdentifier ifid = (IndexableFieldIdentifier)id;
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73 return ifid.getIndex();
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74 }
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75
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76 public String getName() { return "<<Reverse pointers>>"; }
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77 public String getValue() { return ""; }
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78 }
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