1/*
2 * Copyright (c) 2000, 2008, 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.oops;
26
27import sun.jvm.hotspot.debugger.*;
28
29// The class for an oop field simply provides access to the value.
30public class NarrowOopField extends OopField {
31  public NarrowOopField(FieldIdentifier id, long offset, boolean isVMField) {
32    super(id, offset, isVMField);
33  }
34
35  public NarrowOopField(sun.jvm.hotspot.types.OopField vmField, long startOffset) {
36    super(new NamedFieldIdentifier(vmField.getName()), vmField.getOffset() + startOffset, true);
37  }
38
39  public NarrowOopField(InstanceKlass holder, int fieldArrayIndex) {
40    super(holder, fieldArrayIndex);
41  }
42
43  public Oop getValue(Oop obj) {
44    return obj.getHeap().newOop(getValueAsOopHandle(obj));
45  }
46
47  /** Debugging support */
48  public OopHandle getValueAsOopHandle(Oop obj) {
49    return obj.getHandle().getCompOopHandleAt(getOffset());
50  }
51
52  public void setValue(Oop obj) throws MutationException {
53    // Fix this: setOopAt is missing in Address
54  }
55}
56