/*

 * Copyright (c) 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.LockInfo;

import javax.management.openmbean.CompositeType;

import javax.management.openmbean.CompositeData;

import javax.management.openmbean.CompositeDataSupport;

import javax.management.openmbean.OpenDataException;

/**

 * A CompositeData for LockInfo 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 LockInfoCompositeData extends LazyCompositeData {

    private final LockInfo lock;

    private LockInfoCompositeData(LockInfo li) {

        this.lock = li;

    }

    public LockInfo getLockInfo() {

        return lock;

    }

    public static CompositeData toCompositeData(LockInfo li) {

        if (li == null) {

            return null;

        }

        LockInfoCompositeData licd = new LockInfoCompositeData(li);

        return licd.getCompositeData();

    }

    protected CompositeData getCompositeData() {

        // CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH

        // lockInfoItemNames!

        final Object[] lockInfoItemValues = {

            new String(lock.getClassName()),

            lock.getIdentityHashCode(),

        };

        try {

            return new CompositeDataSupport(lockInfoCompositeType,

                                            lockInfoItemNames,

                                            lockInfoItemValues);

        } catch (OpenDataException e) {

            // Should never reach here

            throw Util.newException(e);

        }

    }

    private static final CompositeType lockInfoCompositeType;

    static {

        try {

            lockInfoCompositeType = (CompositeType)

                MappedMXBeanType.toOpenType(LockInfo.class);

        } catch (OpenDataException e) {

            // Should never reach here

            throw Util.newException(e);

        }

    }

    static CompositeType getLockInfoCompositeType() {

        return lockInfoCompositeType;

    }

    private static final String CLASS_NAME         = "className";

    private static final String IDENTITY_HASH_CODE = "identityHashCode";

    private static final String[] lockInfoItemNames = {

        CLASS_NAME,

        IDENTITY_HASH_CODE,

    };

    /*

     * Returns a LockInfo object mapped from the given CompositeData.

     */

    public static LockInfo toLockInfo(CompositeData cd) {

        if (cd == null) {

            throw new NullPointerException("Null CompositeData");

        }

        if (!isTypeMatched(lockInfoCompositeType, cd.getCompositeType())) {

            throw new IllegalArgumentException(

                "Unexpected composite type for LockInfo");

        }

        String className = getString(cd, CLASS_NAME);

        int identityHashCode = getInt(cd, IDENTITY_HASH_CODE);

        return new LockInfo(className, identityHashCode);

    }

    private static final long serialVersionUID = -6374759159749014052L;

}