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1 /*
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2 * Copyright 2000-2003 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.oops;
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26
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27 import java.io.*;
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28 import java.util.*;
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29 import sun.jvm.hotspot.debugger.*;
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30 import sun.jvm.hotspot.runtime.*;
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31 import sun.jvm.hotspot.types.*;
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32
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33 // An Instance is an instance of a Java Class
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34
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35 public class Instance extends Oop {
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36 static {
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37 VM.registerVMInitializedObserver(new Observer() {
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38 public void update(Observable o, Object data) {
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39 initialize(VM.getVM().getTypeDataBase());
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40 }
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41 });
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42 }
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43
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44 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
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45 Type type = db.lookupType("instanceOopDesc");
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46 }
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47
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48 Instance(OopHandle handle, ObjectHeap heap) {
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49 super(handle, heap);
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50 }
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51
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52 public boolean isInstance() { return true; }
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53
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54 public void iterateFields(OopVisitor visitor, boolean doVMFields) {
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55 super.iterateFields(visitor, doVMFields);
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56 ((InstanceKlass) getKlass()).iterateNonStaticFields(visitor);
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57 }
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58
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59 public void printValueOn(PrintStream tty) {
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60 // Special-case strings.
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61 // FIXME: would like to do this in more type-safe fashion (need
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62 // SystemDictionary analogue)
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63 if (getKlass().getName().asString().equals("java/lang/String")) {
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64 tty.print("\"" + OopUtilities.stringOopToString(this) + "\"");
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65 } else {
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66 super.printValueOn(tty);
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67 }
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68 }
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69 }
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