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 

    30 import java.nio.LongBuffer;

    31 import java.nio.ReadOnlyBufferException;

    32 

    33 public class PerfLongArrayCounter extends AbstractCounter

    34        implements LongArrayCounter {

    35 

    36     LongBuffer lb;

    37 

    38     PerfLongArrayCounter(String name, Units u, Variability v,

    39                          int flags, int vectorLength,

    40                          LongBuffer lb) {

    41 

    42         super(name, u, v, flags, vectorLength);

    43         this.lb = lb;

    44     }

    45 

    46     public Object getValue() {

    47         return longArrayValue();

    48     }

    49 

    50     /**

    51      * Get a copy of the elements of the LongArrayCounter.

    52      */

    53     public long[] longArrayValue() {

    54 

    55         lb.position(0);

    56         long[] l = new long[lb.limit()];

    57 

    58         // copy the bytes

    59         lb.get(l);

    60 

    61         return l;

    62     }

    63 

    64     /**

    65      * Get the value of an element of the LongArrayCounter object.

    66      */

    67     public long longAt(int index) {

    68         lb.position(index);

    69         return lb.get();

    70     }

    71 

    72     /**

    73      * Serialize as a snapshot object.

    74      */

    75     protected Object writeReplace() throws java.io.ObjectStreamException {

    76         return new LongArrayCounterSnapshot(getName(),

    77                                             getUnits(),

    78                                             getVariability(),

    79                                             getFlags(),

    80                                             getVectorLength(),

    81                                             longArrayValue());

    82     }

    83 

    84     private static final long serialVersionUID = -2733617913045487126L;

    85 }