| /* |
| * Copyright 2000-2005 Sun Microsystems, Inc. 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. |
| * |
| * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.oops; |
| |
| import java.io.*; |
| import java.util.*; |
| |
| public class ObjectHistogram implements HeapVisitor { |
| |
| public ObjectHistogram() { map = new HashMap(); } |
| |
| private HashMap map; |
| |
| public void prologue(long size) {} |
| |
| public boolean doObj(Oop obj) { |
| Klass klass = obj.getKlass(); |
| if (!map.containsKey(klass)) map.put(klass, new ObjectHistogramElement(klass)); |
| ((ObjectHistogramElement) map.get(klass)).updateWith(obj); |
| return false; |
| } |
| |
| public void epilogue() {} |
| |
| /** Call this after the iteration is complete to obtain the |
| ObjectHistogramElements in descending order of total heap size |
| consumed in the form of a List<ObjectHistogramElement>. */ |
| public List getElements() { |
| List list = new ArrayList(); |
| list.addAll(map.values()); |
| Collections.sort(list, new Comparator() { |
| public int compare(Object o1, Object o2) { |
| return ((ObjectHistogramElement) o1).compare((ObjectHistogramElement) o2); |
| } |
| }); |
| return list; |
| } |
| |
| public void print() { printOn(System.out); } |
| |
| public void printOn(PrintStream tty) { |
| List list = getElements(); |
| ObjectHistogramElement.titleOn(tty); |
| Iterator iterator = list.listIterator(); |
| while (iterator.hasNext()) { |
| ((ObjectHistogramElement) iterator.next()).printOn(tty); |
| } |
| } |
| } |