/* * Copyright (c) 2004, 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. */ package sun.management; import java.lang.management.MemoryNotificationInfo;import java.lang.management.MemoryUsage;import javax.management.openmbean.CompositeData;import javax.management.openmbean.CompositeType;import javax.management.openmbean.CompositeDataSupport;import javax.management.openmbean.OpenDataException; /** * A CompositeData for MemoryNotificationInfo for the local management support. * This class avoids the performance penalty paid to the * construction of a CompositeData use in the local case. */public class MemoryNotifInfoCompositeData extends LazyCompositeData {    private final MemoryNotificationInfo memoryNotifInfo;     private MemoryNotifInfoCompositeData(MemoryNotificationInfo info) {        this.memoryNotifInfo = info;    }     public MemoryNotificationInfo getMemoryNotifInfo() {        return memoryNotifInfo;    }     public static CompositeData toCompositeData(MemoryNotificationInfo info) {        MemoryNotifInfoCompositeData mnicd =            new MemoryNotifInfoCompositeData(info);        return mnicd.getCompositeData();    }     protected CompositeData getCompositeData() {        // CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH        // memoryNotifInfoItemNames!        final Object[] memoryNotifInfoItemValues = {            memoryNotifInfo.getPoolName(),            MemoryUsageCompositeData.toCompositeData(memoryNotifInfo.getUsage()),            new Long(memoryNotifInfo.getCount()),        };         try {            return new CompositeDataSupport(memoryNotifInfoCompositeType,                                            memoryNotifInfoItemNames,                                            memoryNotifInfoItemValues);        } catch (OpenDataException e) {            // Should never reach here            throw new AssertionError(e);        }    }     private static final CompositeType memoryNotifInfoCompositeType;    static {        try {            memoryNotifInfoCompositeType = (CompositeType)                MappedMXBeanType.toOpenType(MemoryNotificationInfo.class);        } catch (OpenDataException e) {            // Should never reach here            throw new AssertionError(e);        }    }     private static final String POOL_NAME = "poolName";    private static final String USAGE     = "usage";    private static final String COUNT     = "count";    private static final String[] memoryNotifInfoItemNames = {        POOL_NAME,        USAGE,        COUNT,    };      public static String getPoolName(CompositeData cd) {        String poolname = getString(cd, POOL_NAME);        if (poolname == null) {            throw new IllegalArgumentException("Invalid composite data: " +                "Attribute " + POOL_NAME + " has null value");        }        return poolname;    }     public static MemoryUsage getUsage(CompositeData cd) {        CompositeData usageData = (CompositeData) cd.get(USAGE);        return MemoryUsage.from(usageData);    }     public static long getCount(CompositeData cd) {        return getLong(cd, COUNT);    }     /** Validate if the input CompositeData has the expected     * CompositeType (i.e. contain all attributes with expected     * names and types).     */    public static void validateCompositeData(CompositeData cd) {        if (cd == null) {            throw new NullPointerException("Null CompositeData");        }         if (!isTypeMatched(memoryNotifInfoCompositeType, cd.getCompositeType())) {            throw new IllegalArgumentException(                "Unexpected composite type for MemoryNotificationInfo");        }    }     private static final long serialVersionUID = -1805123446483771291L;}