1 /*

     2  * Copyright 2000-2008 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    24 

    25 package sun.jvm.hotspot.oops;

    26 

    27 import sun.jvm.hotspot.debugger.*;

    28 

    29 // The class for an oop field simply provides access to the value.

    30 public 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 }