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;
27
28import java.io.IOException;
29import java.io.ObjectOutputStream;
30import java.io.ObjectInputStream;
31
32/**
33 */
34public abstract class AbstractCounter implements Counter {
35
36    String name;
37    Units units;
38    Variability variability;
39    int flags;
40    int vectorLength;
41
42    // Flags defined in hotspot implementation
43    class Flags {
44        static final int SUPPORTED = 0x1;
45    }
46
47    protected AbstractCounter(String name, Units units,
48                              Variability variability, int flags,
49                              int vectorLength) {
50        this.name = name;
51        this.units = units;
52        this.variability = variability;
53        this.flags = flags;
54        this.vectorLength = vectorLength;
55    }
56
57    protected AbstractCounter(String name, Units units,
58                              Variability variability, int flags) {
59        this(name, units, variability, flags, 0);
60    }
61
62    /**
63     * Returns the name of the Performance Counter
64     */
65    public String getName() {
66        return name;
67    }
68
69    /**
70     * Returns the Units for this Performance Counter
71     */
72    public Units getUnits() {
73        return units;
74    }
75
76    /**
77     * Returns the Variability for this performance Object
78     */
79    public Variability getVariability() {
80        return variability;
81    }
82
83    /**
84     * Return true if this performance counter is a vector
85     */
86    public boolean isVector() {
87        return vectorLength > 0;
88    }
89
90    /**
91     * return the length of the vector
92     */
93    public int getVectorLength() {
94        return vectorLength;
95    }
96
97    public boolean isInternal() {
98        return (flags & Flags.SUPPORTED) == 0;
99    }
100
101    /**
102     * return the flags associated with the counter.
103     */
104    public int getFlags() {
105        return flags;
106    }
107
108    public abstract Object getValue();
109
110    public String toString() {
111        String result = getName() + ": " + getValue() + " " + getUnits();
112        if (isInternal()) {
113            return result + " [INTERNAL]";
114        } else {
115            return result;
116        }
117    }
118
119    private static final long serialVersionUID = 6992337162326171013L;
120
121}
122