/*

 * 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();

    }

}