1 /*
   2  * Copyright (c) 2003, 2004, 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.management.counter.perf;
  27 
  28 import sun.management.counter.*;
  29 import java.nio.*;
  30 
  31 public class PerfByteArrayCounter extends AbstractCounter
  32        implements ByteArrayCounter {
  33 
  34     ByteBuffer bb;
  35 
  36     PerfByteArrayCounter(String name, Units u, Variability v,
  37                          int flags, int vectorLength,
  38                          ByteBuffer bb) {
  39 
  40         super(name, u, v, flags, vectorLength);
  41         this.bb = bb;
  42     }
  43 
  44     public Object getValue() {
  45         return byteArrayValue();
  46     }
  47 
  48     /**
  49      * Get a copy of the elements of the ByteArrayCounter.
  50      */
  51     public byte[] byteArrayValue() {
  52 
  53         bb.position(0);
  54         byte[] b = new byte[bb.limit()];
  55 
  56         // copy the bytes
  57         bb.get(b);
  58 
  59         return b;
  60     }
  61 
  62     /**
  63      * Get the value of an element of the ByteArrayCounter object.
  64      */
  65     public byte byteAt(int index) {
  66         bb.position(index);
  67         return bb.get();
  68     }
  69 
  70     public String toString() {
  71         String result = getName() + ": " + new String(byteArrayValue()) +
  72                         " " + getUnits();
  73         if (isInternal()) {
  74             return result + " [INTERNAL]";
  75         } else {
  76             return result;
  77         }
  78     }
  79 
  80     /**
  81      * Serialize as a snapshot object.
  82      */
  83     protected Object writeReplace() throws java.io.ObjectStreamException {
  84        return new ByteArrayCounterSnapshot(getName(),
  85                                            getUnits(),
  86                                            getVariability(),
  87                                            getFlags(),
  88                                            getVectorLength(),
  89                                            byteArrayValue());
  90     }
  91 
  92     private static final long serialVersionUID = 2545474036937279921L;
  93 }