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	/*
	* 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.MemoryUsage;
	import javax.management.openmbean.CompositeType;
	import javax.management.openmbean.CompositeData;
	import javax.management.openmbean.CompositeDataSupport;
	import javax.management.openmbean.OpenDataException;

	/**
	* A CompositeData for MemoryUsage 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 MemoryUsageCompositeData extends LazyCompositeData {
	private final MemoryUsage usage;

	private MemoryUsageCompositeData(MemoryUsage u) {
	this.usage = u;
	}

	public MemoryUsage getMemoryUsage() {
	return usage;
	}

	public static CompositeData toCompositeData(MemoryUsage u) {
	MemoryUsageCompositeData mucd = new MemoryUsageCompositeData(u);
	return mucd.getCompositeData();
	}

	protected CompositeData getCompositeData() {
	// CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH
	// memoryUsageItemNames!
	final Object[] memoryUsageItemValues = {
	new Long(usage.getInit()),
	new Long(usage.getUsed()),
	new Long(usage.getCommitted()),
	new Long(usage.getMax()),
	};

	try {
	return new CompositeDataSupport(memoryUsageCompositeType,
	memoryUsageItemNames,
	memoryUsageItemValues);
	} catch (OpenDataException e) {
	// Should never reach here
	throw new AssertionError(e);
	}
	}

	private static final CompositeType memoryUsageCompositeType;
	static {
	try {
	memoryUsageCompositeType = (CompositeType)
	MappedMXBeanType.toOpenType(MemoryUsage.class);
	} catch (OpenDataException e) {
	// Should never reach here
	throw new AssertionError(e);
	}
	}

	static CompositeType getMemoryUsageCompositeType() {
	return memoryUsageCompositeType;
	}

	private static final String INIT = "init";
	private static final String USED = "used";
	private static final String COMMITTED = "committed";
	private static final String MAX = "max";

	private static final String[] memoryUsageItemNames = {
	INIT,
	USED,
	COMMITTED,
	MAX,
	};

	public static long getInit(CompositeData cd) {
	return getLong(cd, INIT);
	}
	public static long getUsed(CompositeData cd) {
	return getLong(cd, USED);
	}
	public static long getCommitted(CompositeData cd) {
	return getLong(cd, COMMITTED);
	}
	public static long getMax(CompositeData cd) {
	return getLong(cd, MAX);
	}

	/** 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(memoryUsageCompositeType, cd.getCompositeType())) {
	throw new IllegalArgumentException(
	"Unexpected composite type for MemoryUsage");
	}
	}

	private static final long serialVersionUID = -8504291541083874143L;
	}

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