| /* |
| * Copyright (c) 1997, 2008, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| |
| /* |
| * The Original Code is HAT. The Initial Developer of the |
| * Original Code is Bill Foote, with contributions from others |
| * at JavaSoft/Sun. |
| */ |
| |
| package com.sun.tools.hat.internal.model; |
| |
| import java.util.Enumeration; |
| import java.util.Hashtable; |
| |
| |
| /** |
| * |
| * @author Bill Foote |
| */ |
| |
| |
| /** |
| * Represents a java "Thing". A thing is anything that can be the value of |
| * a field. This includes JavaHeapObject, JavaObjectRef, and JavaValue. |
| */ |
| |
| public abstract class JavaThing { |
| |
| protected JavaThing() { |
| } |
| |
| /** |
| * If this is a forward reference, figure out what it really |
| * refers to. |
| * |
| * @param snapshot The snapshot this is for |
| * @param field The field this thing represents. If null, it is |
| * assumed this thing is an object (and never a value). |
| */ |
| public JavaThing dereference(Snapshot shapshot, JavaField field) { |
| return this; |
| } |
| |
| |
| /** |
| * Are we the same type as other? |
| * |
| * @see JavaObject.isSameTypeAs() |
| */ |
| public boolean isSameTypeAs(JavaThing other) { |
| return getClass() == other.getClass(); |
| } |
| /** |
| * @return true iff this represents a heap-allocated object |
| */ |
| abstract public boolean isHeapAllocated(); |
| |
| /** |
| * @return the size of this object, in bytes, including VM overhead |
| */ |
| abstract public int getSize(); |
| |
| /** |
| * @return a human-readable string representation of this thing |
| */ |
| abstract public String toString(); |
| |
| /** |
| * Compare our string representation to other's |
| * @see java.lang.String.compareTo() |
| */ |
| public int compareTo(JavaThing other) { |
| return toString().compareTo(other.toString()); |
| } |
| |
| } |