/*

 * 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] = 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;

}