/*

 * 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.

 *

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package sun.jvmstat.perfdata.monitor;

import sun.jvmstat.monitor.*;

import java.nio.ByteBuffer;

/**

 * Class for monitoring a constant PerfData String instrument. The

 * value associated with a constant string instrument is fixed at

 * the string instrument's creation time. Its value and length never

 * change.

 *

 * @author Brian Doherty

 * @since 1.5

 */

public class PerfStringConstantMonitor extends PerfStringMonitor {

    /**

     * The cached value of the string instrument.

     */

    String data;

    /**

     * Constructor to create a StringMonitor object for the constant string

     * instrument object represented by the data in the given buffer.

     *

     * @param name the name of the instrumentation object

     * @param supported support level indicator

     * @param bb the buffer containing the string instrument data

     */

    public PerfStringConstantMonitor(String name, boolean supported,

                                     ByteBuffer bb) {

        super(name, Variability.CONSTANT, supported, bb);

        this.data = super.stringValue();

    }

    /**

     * {@inheritDoc}

     */

    public Object getValue() {

        return data;        // return the cached string

    }

    /**

     * {@inheritDoc}

     */

    public String stringValue() {

        return data;        // return the cached string

    }

}