/*

 * 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

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 */

package sun.management;

import java.lang.management.MonitorInfo;

import java.util.HashMap;

import java.util.Map;

import javax.management.openmbean.CompositeType;

import javax.management.openmbean.CompositeData;

import javax.management.openmbean.CompositeDataSupport;

import javax.management.openmbean.OpenDataException;

import javax.management.openmbean.OpenType;

/**

 * 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() {

        StackTraceElement ste = lock.getLockedStackFrame();

        CompositeData steCData = ste != null ? StackTraceElementCompositeData.toCompositeData(ste)

                                             : null;

        // values may be null; can't use Map.of

        Map<String,Object> items = new HashMap<>();

        items.put(CLASS_NAME,         lock.getClassName());

        items.put(IDENTITY_HASH_CODE, lock.getIdentityHashCode());

        items.put(LOCKED_STACK_FRAME, steCData);

        items.put(LOCKED_STACK_DEPTH, lock.getLockedStackDepth());

        try {

            return new CompositeDataSupport(MONITOR_INFO_COMPOSITE_TYPE, items);

        } catch (OpenDataException e) {

            // Should never reach here

            throw new AssertionError(e);

        }

    }

    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";

    private static final String[] MONITOR_INFO_ATTRIBUTES = {

        CLASS_NAME,

        IDENTITY_HASH_CODE,

        LOCKED_STACK_FRAME,

        LOCKED_STACK_DEPTH

    };

    private static final CompositeType MONITOR_INFO_COMPOSITE_TYPE;

    private static final CompositeType V6_COMPOSITE_TYPE;

    static {

        try {

            MONITOR_INFO_COMPOSITE_TYPE = (CompositeType)

                MappedMXBeanType.toOpenType(MonitorInfo.class);

            OpenType<?>[] types = new OpenType<?>[MONITOR_INFO_ATTRIBUTES.length];

            for (int i = 0; i < MONITOR_INFO_ATTRIBUTES.length; i++) {

                String name = MONITOR_INFO_ATTRIBUTES[i];

                types[i] = name.equals(LOCKED_STACK_FRAME)

                            ? StackTraceElementCompositeData.v5CompositeType()

                            : MONITOR_INFO_COMPOSITE_TYPE.getType(name);

            }

            V6_COMPOSITE_TYPE = new CompositeType("MonitorInfo",

                                                  "JDK 6 MonitorInfo",

                                                  MONITOR_INFO_ATTRIBUTES,

                                                  MONITOR_INFO_ATTRIBUTES,

                                                  types);

        } catch (OpenDataException e) {

            // Should never reach here

            throw new AssertionError(e);

        }

    }

    static CompositeType v6CompositeType() {

        return V6_COMPOSITE_TYPE;

    }

    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(MONITOR_INFO_COMPOSITE_TYPE, cd.getCompositeType()) &&

            !isTypeMatched(V6_COMPOSITE_TYPE, cd.getCompositeType())) {

            throw new IllegalArgumentException(

                "Unexpected composite type for MonitorInfo");

        }

    }

    private static final long serialVersionUID = -5825215591822908529L;

}