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
26package sun.management.counter.perf;
27
28import sun.management.counter.*;
29import java.nio.*;
30
31public 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}
94