/* * 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 describing units of measurement * attribute for instrumentation objects. * * @author   Brian Doherty */public class Units implements java.io.Serializable {     /* The enumeration values for this typesafe enumeration must be     * kept in synchronization with the Units enum in the perfData.hpp file     * in the HotSpot source base.     */     private static final int NUNITS=8;     private static Units[] map = new Units[NUNITS];     private final String name;    private final int value;     /**     * An Invalid Units value.     */    public static final Units INVALID = new Units("Invalid", 0);     /**     * Units attribute representing unit-less quantities.     */    public static final Units NONE = new Units("None", 1);     /**     * Units attribute representing Bytes.     */    public static final Units BYTES = new Units("Bytes", 2);     /**     * Units attribute representing Ticks.     */    public static final Units TICKS = new Units("Ticks", 3);     /**     * Units attribute representing a count of events.     */    public static final Units EVENTS = new Units("Events", 4);     /**     * Units attribute representing String data. Although not really     * a unit of measure, this Units value serves to distinguish String     * instrumentation objects from instrumentation objects of other types.     */    public static final Units STRING = new Units("String", 5);     /**     * Units attribute representing Hertz (frequency).     */    public static final Units HERTZ = new Units("Hertz", 6);     /**     * Returns a string describing this Unit of measurement attribute     *     * @return String - a descriptive string for this enum.     */    public String toString() {        return name;    }     /**     * Returns the integer representation of this Units attribute     *     * @return int - an integer representation of this Units attribute.     */    public int intValue() {        return value;    }     /**     * Maps an integer value to its corresponding Units attribute.     * If the integer value does not have a corresponding Units enum     * value, then {@link Units#INVALID} is returned.     *     * @param value an integer representation of counter Units     * @return Units - the Units object for the given <code>value</code>     *                 or {@link Units#INVALID} if out of range.     */    public static Units toUnits(int value) {         if (value < 0 || value >= map.length || map[value] == null) {            return INVALID;        }         return map[value];    }     private Units(String name, int value) {        this.name = name;        this.value = value;        map[value] = this;    }     private static final long serialVersionUID = 6992337162326171013L;}