/* * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.jvmstat.monitor; /** * Provides a typesafe enumeration for the Variability attribute for * instrumentation objects. * * @author   Brian Doherty */public class Variability implements java.io.Serializable {     /* The enumeration values for this typesafe enumeration must be     * kept in synchronization with the Variability enum in the perfData.hpp file     * in the HotSpot source base.     */     private static final int NATTRIBUTES = 4;    private static Variability[] map = new Variability[NATTRIBUTES];     private String name;    private int value;     /**     * An invalid Variablity value.     */    public static final Variability INVALID = new Variability("Invalid",0);     /**     * Variability attribute representing Constant counters.     */    public static final Variability CONSTANT = new Variability("Constant",1);     /**     * Variability attribute representing a Monotonically changing counters.     */    public static final Variability MONOTONIC = new Variability("Monotonic",2);     /**     * Variability attribute representing Variable counters.     */    public static final Variability VARIABLE = new Variability("Variable",3);     /**     * Returns a string describing this Variability attribute.     *     * @return String - a descriptive string for this enum.     */    public String toString() {        return name;    }     /**     * Returns the integer representation of this Variability attribute.     *     * @return int - an integer representation of this Variability attribute.     */    public int intValue() {        return value;    }     /**     * Maps an integer value its corresponding Variability attribute.     * If the integer value does not have a corresponding Variability enum     * value, the {@link Variability#INVALID} is returned     *     * @param value an integer representation of a Variability attribute     * @return Variability - The Variability object for the given     *                       <code>value</code> or {@link Variability#INVALID}     *                       if out of range.     */    public static Variability toVariability(int value) {         if (value < 0 || value >= map.length || map[value] == null) {            return INVALID;        }         return map[value];    }     private Variability(String name, int value) {        this.name = name;        this.value = value;        map[value]=this;    }     private static final long serialVersionUID = 6992337162326171013L;}