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	/*
	* Copyright (c) 2005, 2012, 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.MonitorInfo;
	import javax.management.openmbean.CompositeType;
	import javax.management.openmbean.CompositeData;
	import javax.management.openmbean.CompositeDataSupport;
	import javax.management.openmbean.OpenDataException;
	import java.util.Set;

	/**
	* A CompositeData for MonitorInfo 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 MonitorInfoCompositeData extends LazyCompositeData {
	private final MonitorInfo lock;

	private MonitorInfoCompositeData(MonitorInfo mi) {
	this.lock = mi;
	}

	public MonitorInfo getMonitorInfo() {
	return lock;
	}

	public static CompositeData toCompositeData(MonitorInfo mi) {
	MonitorInfoCompositeData micd = new MonitorInfoCompositeData(mi);
	return micd.getCompositeData();
	}

	protected CompositeData getCompositeData() {
	// CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH
	// monitorInfoItemNames!

	int len = monitorInfoItemNames.length;
	Object[] values = new Object[len];
	CompositeData li = LockInfoCompositeData.toCompositeData(lock);

	for (int i = 0; i < len; i++) {
	String item = monitorInfoItemNames[i];
	if (item.equals(LOCKED_STACK_FRAME)) {
	StackTraceElement ste = lock.getLockedStackFrame();
	values[i] = (ste != null ? StackTraceElementCompositeData.
	toCompositeData(ste)
	: null);
	} else if (item.equals(LOCKED_STACK_DEPTH)) {
	values[i] = new Integer(lock.getLockedStackDepth());
	} else {
	values[i] = li.get(item);
	}
	}

	try {
	return new CompositeDataSupport(monitorInfoCompositeType,
	monitorInfoItemNames,
	values);
	} catch (OpenDataException e) {
	// Should never reach here
	throw new AssertionError(e);
	}
	}

	private static final CompositeType monitorInfoCompositeType;
	private static final String[] monitorInfoItemNames;
	static {
	try {
	monitorInfoCompositeType = (CompositeType)
	MappedMXBeanType.toOpenType(MonitorInfo.class);
	Set<String> s = monitorInfoCompositeType.keySet();
	monitorInfoItemNames = s.toArray(new String[0]);
	} catch (OpenDataException e) {
	// Should never reach here
	throw new AssertionError(e);
	}
	}

	static CompositeType getMonitorInfoCompositeType() {
	return monitorInfoCompositeType;
	}

	private static final String CLASS_NAME = "className";
	private static final String IDENTITY_HASH_CODE = "identityHashCode";
	private static final String LOCKED_STACK_FRAME = "lockedStackFrame";
	private static final String LOCKED_STACK_DEPTH = "lockedStackDepth";

	public static String getClassName(CompositeData cd) {
	return getString(cd, CLASS_NAME);
	}

	public static int getIdentityHashCode(CompositeData cd) {
	return getInt(cd, IDENTITY_HASH_CODE);
	}

	public static StackTraceElement getLockedStackFrame(CompositeData cd) {
	CompositeData ste = (CompositeData) cd.get(LOCKED_STACK_FRAME);
	if (ste != null) {
	return StackTraceElementCompositeData.from(ste);
	} else {
	return null;
	}
	}

	public static int getLockedStackDepth(CompositeData cd) {
	return getInt(cd, LOCKED_STACK_DEPTH);
	}

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

	private static final long serialVersionUID = -5825215591822908529L;
	}

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