Java tutorial
/* * 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 java.util.Collection; import java.util.List; import com.google.common.collect.Iterables; import com.google.common.collect.Lists; import com.sun.tools.hat.internal.model.*; import com.sun.tools.hat.internal.util.Misc; /** * * @author Bill Foote */ class InstancesQuery extends QueryHandler { private final boolean includeSubclasses; private final boolean newObjects; public InstancesQuery(boolean includeSubclasses) { this(includeSubclasses, false); } public InstancesQuery(boolean includeSubclasses, boolean newObjects) { this.includeSubclasses = includeSubclasses; this.newObjects = newObjects; } @Override public void run() { ClassResolver resolver = new ClassResolver(snapshot, true); JavaClass clazz = resolver.apply(query); List<JavaClass> referrers = Lists.transform(params.get("referrer"), resolver); boolean referee = Boolean.parseBoolean(Iterables.getOnlyElement(params.get("referee"), "false")); String instancesOf; if (newObjects) instancesOf = referee ? "New referees" : "New instances"; else instancesOf = referee ? "Referees" : "Instances"; startHtml(String.format("%s of %s%s", instancesOf, clazz.getName(), includeSubclasses ? " (including subclasses)" : "")); if (referrers.isEmpty()) { out.print("<strong>"); printClass(clazz); out.print("</strong><br><br>"); } else { printBreadcrumbs(path, null, null, clazz, referrers, null); } Collection<JavaHeapObject> objects = Misc.getInstances(clazz, includeSubclasses, referrers); if (referee) { int size = referrers.size(); JavaClass prev = size > 1 ? referrers.get(size - 2) : clazz; objects = Misc.getRefereesByClass(objects, prev); } long totalSize = 0; long instances = 0; for (JavaHeapObject obj : objects) { if (newObjects && !obj.isNew()) continue; printThing(obj); out.println("<br>"); totalSize += obj.getSize(); instances++; } out.println("<h2>Total of " + instances + " instances occupying " + totalSize + " bytes.</h2>"); endHtml(); } }