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/* * Copyright (c) 2005, 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 com.sun.management.VMOption;import com.sun.management.VMOption.Origin;import javax.management.openmbean.CompositeType;import javax.management.openmbean.CompositeData;import javax.management.openmbean.CompositeDataSupport;import javax.management.openmbean.OpenDataException; /** * A CompositeData for VMOption 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 VMOptionCompositeData extends LazyCompositeData {    private final VMOption option;     private VMOptionCompositeData(VMOption option) {        this.option = option;    }     public VMOption getVMOption() {        return option;    }     public static CompositeData toCompositeData(VMOption option) {        VMOptionCompositeData vcd = new VMOptionCompositeData(option);        return vcd.getCompositeData();    }     protected CompositeData getCompositeData() {        // CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH        // vmOptionItemNames!        final Object[] vmOptionItemValues = {            option.getName(),            option.getValue(),            new Boolean(option.isWriteable()),            option.getOrigin().toString(),        };         try {            return new CompositeDataSupport(vmOptionCompositeType,                                            vmOptionItemNames,                                            vmOptionItemValues);        } catch (OpenDataException e) {            // Should never reach here            throw new AssertionError(e);        }    }     private static final CompositeType vmOptionCompositeType;    static {        try {            vmOptionCompositeType = (CompositeType)                MappedMXBeanType.toOpenType(VMOption.class);        } catch (OpenDataException e) {            // Should never reach here            throw new AssertionError(e);        }    }     static CompositeType getVMOptionCompositeType() {        return vmOptionCompositeType;    }     private static final String NAME      = "name";    private static final String VALUE     = "value";    private static final String WRITEABLE = "writeable";    private static final String ORIGIN    = "origin";     private static final String[] vmOptionItemNames = {        NAME,        VALUE,        WRITEABLE,        ORIGIN,    };     public static String getName(CompositeData cd) {        return getString(cd, NAME);    }    public static String getValue(CompositeData cd) {        return getString(cd, VALUE);    }    public static Origin getOrigin(CompositeData cd) {        String o = getString(cd, ORIGIN);        return Enum.valueOf(Origin.class, o);    }    public static boolean isWriteable(CompositeData cd) {        return getBoolean(cd, WRITEABLE);    }     /** 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(vmOptionCompositeType, cd.getCompositeType())) {            throw new IllegalArgumentException(                "Unexpected composite type for VMOption");        }    }     private static final long serialVersionUID = -2395573975093578470L;}