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.types.basic;
  26 
  27 import sun.jvm.hotspot.debugger.*;
  28 import sun.jvm.hotspot.types.*;
  29 
  30 /** A specialization of BasicField which represents a field containing
  31     an oop value and which adds typechecked getValue() routines
  32     returning OopHandles. */
  33 
  34 public class BasicOopField extends BasicField implements OopField {
  35 
  36 
  37   public BasicOopField(OopField oopf) {
  38     super(oopf);
  39   }
  40 
  41   public BasicOopField(BasicTypeDataBase db, Type containingType, String name, Type type,
  42                        boolean isStatic, long offset, Address staticFieldAddress) {
  43     super(db, containingType, name, type, isStatic, offset, staticFieldAddress);
  44 
  45     if (!type.isOopType()) {
  46       throw new WrongTypeException("Type of a BasicOopField must be an oop type");
  47     }
  48   }
  49 
  50   /** The field must be nonstatic and the type of the field must be a
  51       Java oop, or a WrongTypeException will be thrown. */
  52   public OopHandle getValue(Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
  53     return getOopHandle(addr);
  54   }
  55 
  56   /** The field must be static and the type of the field must be a
  57       Java oop, or a WrongTypeException will be thrown. */
  58   public OopHandle getValue() throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
  59     return getOopHandle();
  60   }
  61 }