1 /*
   2  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.jvmstat.perfdata.monitor;
  27 
  28 import sun.jvmstat.monitor.*;
  29 import java.nio.IntBuffer;
  30 
  31 /**
  32  * Class for monitoring a PerfData Integer instrument.
  33  *
  34  * @author Brian Doherty
  35  * @since 1.5
  36  */
  37 public class PerfIntegerMonitor extends AbstractMonitor
  38                                 implements IntegerMonitor {
  39 
  40     /**
  41      * The buffer containing the data for the integer instrument.
  42      */
  43     IntBuffer ib;
  44 
  45     /**
  46      * Constructor to create an IntegerMonitor object for the integer
  47      *  instrument represented by the data in the given buffer.
  48      *
  49      * @param name the name of the integer instrument
  50      * @param u the units of measure attribute
  51      * @param v the variability attribute
  52      * @param supported support level indicator
  53      * @param ib the buffer containing the integer instrument data.
  54      */
  55     public PerfIntegerMonitor(String name, Units u, Variability v,
  56                               boolean supported, IntBuffer ib) {
  57         super(name, u, v, supported);
  58         this.ib = ib;
  59     }
  60 
  61     /**
  62      * {@inheritDoc}
  63      * The object returned contains an Integer object containing the
  64      * current value of the IntegerInstrument.
  65      *
  66      * @return Object - the current value of the the IntegerInstrument. The
  67      *                   return type is guaranteed to be of type Integer.
  68      */
  69     public Object getValue() {
  70         return new Integer(ib.get(0));
  71     }
  72 
  73     /**
  74      * Return the current value of the IntegerInstrument as an int.
  75      *
  76      * @return int - a the current value of the IntegerInstrument.
  77      */
  78     public int intValue() {
  79         return ib.get(0);
  80     }
  81 }