Back to index...

	/*
	* Copyright (c) 1997, 2013, 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.*;
	import java.util.*;

	/**
	* References by type summary
	*
	*/
	public class RefsByTypeQuery extends QueryHandler {
	public void run() {
	JavaClass clazz = snapshot.findClass(query);
	if (clazz == null) {
	error("class not found: " + query);
	} else {
	Map<JavaClass, Long> referrersStat = new HashMap<JavaClass, Long>();
	final Map<JavaClass, Long> refereesStat = new HashMap<JavaClass, Long>();
	Enumeration instances = clazz.getInstances(false);
	while (instances.hasMoreElements()) {
	JavaHeapObject instance = (JavaHeapObject) instances.nextElement();
	if (instance.getId() == -1) {
	continue;
	}
	Enumeration e = instance.getReferers();
	while (e.hasMoreElements()) {
	JavaHeapObject ref = (JavaHeapObject) e.nextElement();
	JavaClass cl = ref.getClazz();
	if (cl == null) {
	System.out.println("null class for " + ref);
	continue;
	}
	Long count = referrersStat.get(cl);
	if (count == null) {
	count = new Long(1);
	} else {
	count = new Long(count.longValue() + 1);
	}
	referrersStat.put(cl, count);
	}
	instance.visitReferencedObjects(
	new AbstractJavaHeapObjectVisitor() {
	public void visit(JavaHeapObject obj) {
	JavaClass cl = obj.getClazz();
	Long count = refereesStat.get(cl);
	if (count == null) {
	count = new Long(1);
	} else {
	count = new Long(count.longValue() + 1);
	}
	refereesStat.put(cl, count);
	}
	}
	);
	} // for each instance

	startHtml("References by Type");
	out.println("<p align='center'>");
	printClass(clazz);
	if (clazz.getId() != -1) {
	println("[" + clazz.getIdString() + "]");
	}
	out.println("</p>");

	if (referrersStat.size() != 0) {
	out.println("<h3 align='center'>Referrers by Type</h3>");
	print(referrersStat);
	}

	if (refereesStat.size() != 0) {
	out.println("<h3 align='center'>Referees by Type</h3>");
	print(refereesStat);
	}

	endHtml();
	} // clazz != null
	} // run

	private void print(final Map<JavaClass, Long> map) {
	out.println("<table border='1' align='center'>");
	Set<JavaClass> keys = map.keySet();
	JavaClass[] classes = new JavaClass[keys.size()];
	keys.toArray(classes);
	Arrays.sort(classes, new Comparator<JavaClass>() {
	public int compare(JavaClass first, JavaClass second) {
	Long count1 = map.get(first);
	Long count2 = map.get(second);
	return count2.compareTo(count1);
	}
	});

	out.println("<tr><th>Class</th><th>Count</th></tr>");
	for (int i = 0; i < classes.length; i++) {
	JavaClass clazz = classes[i];
	out.println("<tr><td>");
	out.print("<a href='/refsByType/");
	print(clazz.getIdString());
	out.print("'>");
	print(clazz.getName());
	out.println("</a>");
	out.println("</td><td>");
	out.println(map.get(clazz));
	out.println("</td></tr>");
	}
	out.println("</table>");
	}
	}

Back to index...