1 /*

     2  * Copyright 2003-2004 Sun Microsystems, Inc.  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.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any 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 }