/*

 * Copyright (c) 2004, 2010, 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.jvmstat.perfdata.monitor;

import sun.jvmstat.monitor.*;

import java.nio.LongBuffer;

/**

 * Class for monitoring a PerfData Long instrument.

 *

 * @author Brian Doherty

 * @since 1.5

 */

public class PerfLongMonitor extends AbstractMonitor implements LongMonitor {

    /**

     * The buffer containing the data for the long instrument.

     */

    LongBuffer lb;

    /**

     * Constructor to create a LongMonitor object for the long instrument

     * represented by the data in the given buffer.

     *

     * @param name the name of the long instrument

     * @param u the units of measure attribute

     * @param v the variability attribute

     * @param supported support level indicator

     * @param lb the buffer containing the long instrument data.

     */

    public PerfLongMonitor(String name, Units u, Variability v,

                           boolean supported, LongBuffer lb) {

        super(name, u, v, supported);

        this.lb = lb;

    }

    /**

     * {@inheritDoc}

     * The object returned contains a Long object containing the

     * current value of the LongInstrument.

     *

     * @return Object - the current value of the the LongInstrument. The

     *                  return type is guaranteed to be of type Long.

     */

    public Object getValue() {

        return new Long(lb.get(0));

    }

    /**

     * Return the current value of the LongInstrument as an long.

     *

     * @return long - the current value of the LongInstrument

     */

    public long longValue() {

        return lb.get(0);

    }

}