/*

 * Copyright (c) 2003, 2011, 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

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 */

package sun.management;

import java.lang.management.ManagementFactory;

import java.lang.management.MemoryManagerMXBean;

import java.lang.management.MemoryPoolMXBean;

import javax.management.MBeanNotificationInfo;

import javax.management.ObjectName;

/**

 * Implementation class for a memory manager.

 * Standard and committed hotspot-specific metrics if any.

 *

 * ManagementFactory.getMemoryManagerMXBeans() returns a list

 * of instances of this class.

 */

class MemoryManagerImpl extends NotificationEmitterSupport

    implements MemoryManagerMXBean {

    private final String  name;

    private final boolean isValid;

    private MemoryPoolMXBean[] pools;

    MemoryManagerImpl(String name) {

        this.name = name;

        this.isValid = true;

        this.pools = null;

    }

    public String getName() {

        return name;

    }

    public boolean isValid() {

        return isValid;

    }

    public String[] getMemoryPoolNames() {

        MemoryPoolMXBean[] ps = getMemoryPools();

        String[] names = new String[ps.length];

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

            names[i] = ps[i].getName();

        }

        return names;

    }

    synchronized MemoryPoolMXBean[] getMemoryPools() {

        if (pools == null) {

            pools = getMemoryPools0();

        }

        return pools;

    }

    private native MemoryPoolMXBean[] getMemoryPools0();

    private MBeanNotificationInfo[] notifInfo = null;

    public MBeanNotificationInfo[] getNotificationInfo() {

        synchronized (this) {

            if(notifInfo == null) {

                notifInfo = new MBeanNotificationInfo[0];

            }

        }

        return notifInfo;

    }

    public ObjectName getObjectName() {

        return Util.newObjectName(ManagementFactory.MEMORY_MANAGER_MXBEAN_DOMAIN_TYPE, getName());

    }

}