1 /*
   2  * Copyright (c) 2011, 2015, 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 package jdk.vm.ci.hotspot;
  24 
  25 import jdk.vm.ci.meta.ResolvedJavaField;
  26 
  27 /**
  28  * Represents a field in a HotSpot type.
  29  */
  30 public interface HotSpotResolvedJavaField extends ResolvedJavaField {
  31 
  32     /**
  33      * Determines if a given object contains this field.
  34      *
  35      * @return true iff this is a non-static field and its declaring class is assignable from
  36      *         {@code object}'s class
  37      */
  38     boolean isInObject(Object object);
  39 
  40     int offset();
  41 
  42     /**
  43      * Determines if this field should be treated as a constant.
  44      */
  45     boolean isStable();
  46 
  47     /**
  48      * Determines if this field should be considered constant if it has the default value for its
  49      * type (e.g, 0, null, etc.). The result of this method is undefined if this field is not
  50      * {@linkplain #isStable() stable}.
  51      */
  52     boolean isDefaultStable();
  53 }