/* * 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.server; import com.sun.tools.hat.internal.model.JavaClass;import java.util.Arrays;import java.util.Comparator; /** * Prints histogram sortable by class name, count and size. * */public class HistogramQuery extends QueryHandler {    public void run() {        JavaClass[] classes = snapshot.getClassesArray();        Comparator<JavaClass> comparator;        if (query.equals("count")) {            comparator = new Comparator<JavaClass>() {                public int compare(JavaClass first, JavaClass second) {                    long diff = (second.getInstancesCount(false) -                             first.getInstancesCount(false));                    return (diff == 0)? 0: ((diff < 0)? -1 : + 1);                }            };        } else if (query.equals("class")) {            comparator = new Comparator<JavaClass>() {                public int compare(JavaClass first, JavaClass second) {                    return first.getName().compareTo(second.getName());                }            };        } else {            // default sort is by total size            comparator = new Comparator<JavaClass>() {                public int compare(JavaClass first, JavaClass second) {                    long diff = (second.getTotalInstanceSize() -                             first.getTotalInstanceSize());                    return (diff == 0)? 0: ((diff < 0)? -1 : + 1);                }            };        }        Arrays.sort(classes, comparator);         startHtml("Heap Histogram");         out.println("<p align='center'>");        out.println("<b><a href='/'>All Classes (excluding platform)</a></b>");        out.println("</p>");         out.println("<table align=center border=1>");        out.println("<tr><th><a href='/histo/class'>Class</a></th>");        out.println("<th><a href='/histo/count'>Instance Count</a></th>");        out.println("<th><a href='/histo/size'>Total Size</a></th></tr>");        for (int i = 0; i < classes.length; i++) {            JavaClass clazz = classes[i];            out.println("<tr><td>");            printClass(clazz);            out.println("</td>");            out.println("<td>");            out.println(clazz.getInstancesCount(false));            out.println("</td>");            out.println("<td>");            out.println(clazz.getTotalInstanceSize());            out.println("</td></tr>");        }        out.println("</table>");         endHtml();    }}