/*
 * Copyright (c) 2005, 2015, 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.internal;

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;
import sun.management.LazyCompositeData;
import sun.management.MappedMXBeanType;

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.
/** * 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(), 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).
/** 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; }