DefaultMetadataVisitor.java

/*
 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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package sun.jvm.hotspot.oops;

import sun.jvm.hotspot.debugger.Address;

/** A DefaultMetadataVisitor implements basic no-op MetadataVisitor
    functionality except that the setObj() and getObj() methods are
    implemented properly. */
abstract public class DefaultMetadataVisitor implements MetadataVisitor {
  private Metadata obj;

  public void prologue()                        {}

  // Called after visiting an object
  public void epilogue()                        {}

  public void setObj(Metadata obj) {
    this.obj = obj;
  }

  public Metadata getObj() {
    return obj;
  }

  // Callback methods for each field type in an object
  abstract public void doMetadata(MetadataField field, boolean isVMField);
  public void doOop(OopField field, boolean isVMField)         {}
  public void doOop(NarrowOopField field, boolean isVMField)   {}
  public void doByte(ByteField field, boolean isVMField)       {}
  public void doChar(CharField field, boolean isVMField)       {}
  public void doBoolean(BooleanField field, boolean isVMField) {}
  public void doShort(ShortField field, boolean isVMField)     {}
  public void doInt(IntField field, boolean isVMField)         {}
  public void doLong(LongField field, boolean isVMField)       {}
  public void doFloat(FloatField field, boolean isVMField)     {}
  public void doDouble(DoubleField field, boolean isVMField)   {}
  public void doCInt(CIntField field, boolean isVMField)       {}
}