/* * Copyright (c) 2003, 2004, 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. */ package com.sun.management;import javax.management.openmbean.CompositeData;import javax.management.openmbean.CompositeType; /** * Platform-specific management interface for a garbage collector * which performs collections in cycles. * * <p> This platform extension is only available to the garbage * collection implementation that supports this extension. * * @author  Mandy Chung * @since   1.5 */public interface GarbageCollectorMXBean    extends java.lang.management.GarbageCollectorMXBean {     /**     * Returns the GC information about the most recent GC.     * This method returns a {@link GcInfo}.     * If no GC information is available, <tt>null</tt> is returned.     * The collector-specific attributes, if any, can be obtained     * via the {@link CompositeData CompositeData} interface.     * <p>     * <b>MBeanServer access:</b>     * The mapped type of <tt>GcInfo</tt> is <tt>CompositeData</tt>     * with attributes specified in {@link GcInfo#from GcInfo}.     *     * @return a <tt>GcInfo</tt> object representing     * the most GC information; or <tt>null</tt> if no GC     * information available.     */    public GcInfo getLastGcInfo();}