/* * 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.io.IOException;import com.sun.tools.hat.internal.parser.ReadBuffer; /** * @author      Bill Foote */public class JavaObjectArray extends JavaLazyReadObject {     private Object clazz;  // Long before resolve, the class after resolve     public JavaObjectArray(long classID, long offset) {        super(offset);        this.clazz = makeId(classID);    }     public JavaClass getClazz() {        return (JavaClass) clazz;    }     public void resolve(Snapshot snapshot) {        if (clazz instanceof JavaClass) {            return;        }        long classID = getIdValue((Number)clazz);        if (snapshot.isNewStyleArrayClass()) {            // Modern heap dumps do this            JavaThing t = snapshot.findThing(classID);            if (t instanceof JavaClass) {                clazz = (JavaClass) t;            }        }        if (!(clazz instanceof JavaClass)) {            JavaThing t = snapshot.findThing(classID);            if (t != null && t instanceof JavaClass) {                JavaClass el = (JavaClass) t;                String nm = el.getName();                if (!nm.startsWith("[")) {                    nm = "L" + el.getName() + ";";                }                clazz = snapshot.getArrayClass(nm);            }        }         if (!(clazz instanceof JavaClass)) {            clazz = snapshot.getOtherArrayType();        }        ((JavaClass)clazz).addInstance(this);        super.resolve(snapshot);    }     public JavaThing[] getValues() {        return getElements();    }     public JavaThing[] getElements() {        Snapshot snapshot = getClazz().getSnapshot();        byte[] data = getValue();        final int idSize = snapshot.getIdentifierSize();        final int numElements = data.length / idSize;        JavaThing[] elements = new JavaThing[numElements];        int index = 0;        for (int i = 0; i < elements.length; i++) {            long id = objectIdAt(index, data);            index += idSize;            elements[i] = snapshot.findThing(id);        }        return elements;    }     public int compareTo(JavaThing other) {        if (other instanceof JavaObjectArray) {            return 0;        }        return super.compareTo(other);    }     public int getLength() {        return getValueLength() / getClazz().getIdentifierSize();    }     public void visitReferencedObjects(JavaHeapObjectVisitor v) {        super.visitReferencedObjects(v);        JavaThing[] elements = getElements();        for (int i = 0; i < elements.length; i++) {            if (elements[i] != null && elements[i] instanceof JavaHeapObject) {                v.visit((JavaHeapObject) elements[i]);            }        }    }     /**     * Describe the reference that this thing has to target.  This will only     * be called if target is in the array returned by getChildrenForRootset.     */    public String describeReferenceTo(JavaThing target, Snapshot ss) {        JavaThing[] elements = getElements();        for (int i = 0; i < elements.length; i++) {            if (elements[i] == target) {                return "Element " + i + " of " + this;            }        }        return super.describeReferenceTo(target, ss);    }     /*     * Java object array record (HPROF_GC_OBJ_ARRAY_DUMP)     * looks as below:     *     *     object ID     *     stack trace serial number (int)     *     array length (int)     *     array class ID     *     array element IDs     */    protected final int readValueLength() throws IOException {        JavaClass cl = getClazz();        ReadBuffer buf = cl.getReadBuffer();        int idSize = cl.getIdentifierSize();        long offset = getOffset() + idSize + 4;        int len = buf.getInt(offset);        return len * cl.getIdentifierSize();    }     protected final byte[] readValue() throws IOException {        JavaClass cl = getClazz();        ReadBuffer buf = cl.getReadBuffer();        int idSize = cl.getIdentifierSize();        long offset = getOffset() + idSize + 4;        int len = buf.getInt(offset);        if (len == 0) {            return Snapshot.EMPTY_BYTE_ARRAY;        } else {            byte[] res = new byte[len * idSize];            buf.get(offset + 4 + idSize, res);            return res;        }    }}