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1   /*
2    * Copyright (c) 2000, 2012, 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
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22   *
23   */
24  
25  package sun.jvm.hotspot.oops;
26  
27  /** A DefaultOopVisitor implements basic no-op OopVisitor
28      functionality except that the setObj() and getObj() methods are
29      implemented properly. */
30  
31  public class DefaultOopVisitor implements OopVisitor {
32    private Oop obj;
33  
34    public void prologue()                        {}
35  
36    // Called after visiting an object
37    public void epilogue()                        {}
38  
39    public void setObj(Oop obj) {
40      this.obj = obj;
41    }
42  
43    public Oop getObj() {
44      return obj;
45    }
46  
47    // Callback methods for each field type in an object
48    public void doMetadata(MetadataField field, boolean isVMField) {}
49    public void doOop(OopField field, boolean isVMField)         {}
50    public void doOop(NarrowOopField field, boolean isVMField)   {}
51    public void doByte(ByteField field, boolean isVMField)       {}
52    public void doChar(CharField field, boolean isVMField)       {}
53    public void doBoolean(BooleanField field, boolean isVMField) {}
54    public void doShort(ShortField field, boolean isVMField)     {}
55    public void doInt(IntField field, boolean isVMField)         {}
56    public void doLong(LongField field, boolean isVMField)       {}
57    public void doFloat(FloatField field, boolean isVMField)     {}
58    public void doDouble(DoubleField field, boolean isVMField)   {}
59    public void doCInt(CIntField field, boolean isVMField)       {}
60  }