/* * Copyright (c) 2004, 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.tools.jstat; import java.util.*; /** * A typesafe enumeration for describing data scaling semantics * * @author Brian Doherty * @since 1.5 */public class Scale {    private static int nextOrdinal = 0;    private static HashMap<String, Scale> map = new HashMap<String, Scale>();     private final String name;    private final int ordinal = nextOrdinal++;    private final double factor;     private Scale(String name, double factor) {        this.name = name;        this.factor = factor;        assert !map.containsKey(name);        map.put(name, this);    }     /**     * Scale representing a no scaling     */    public static final Scale RAW = new Scale("raw", 1);     /**     * Scale representing a percent scaling     */    public static final Scale PERCENT = new Scale("percent", 1/100);     /**     * Scale representing a kilo scaling     */    public static final Scale KILO = new Scale("K", 1024);     /**     * Scale representing a mega scaling     */    public static final Scale MEGA = new Scale("M", 1024*1024);     /**     * Scale representing a giga scaling     */    public static final Scale GIGA = new Scale("G", 1024*1024*1024);     /**     * Scale representing a tera scaling     */    public static final Scale TERA = new Scale("T", 1024*1024*1024*1024);     /**     * Scale representing a tera scaling     */    public static final Scale PETA = new Scale("P", 1024*1024*1024*1024*1024);     /**     * Scale representing a pico scaling     */    public static final Scale PICO = new Scale("p", 10.0E-12);     /**     * Scale representing a nano scaling     */    public static final Scale NANO = new Scale("n", 10.0E-9);     /**     * Scale representing a micro scaling     */    public static final Scale MICRO = new Scale("u", 10.0E-6);     /**     * Scale representing a milli scaling     */    public static final Scale MILLI = new Scale("m", 10.0E-3);     /**     * Scale representing a picosecond scaling     */    public static final Scale PSEC = new Scale("ps", 10.0E-12);     /**     * Scale representing a nanosecond scaling     */    public static final Scale NSEC = new Scale("ns", 10.0E-9);     /**     * Scale representing a microsecond scaling     */    public static final Scale USEC = new Scale("us", 10.0E-6);     /**     * Scale representing a millisecond scaling     */    public static final Scale MSEC = new Scale("ms", 10.0E-3);     /**     * Scale representing a second scaling     */    public static final Scale SEC = new Scale("s", 1);    public static final Scale SEC2 = new Scale("sec", 1);     /**     * Scale representing a minutes scaling     */    public static final Scale MINUTES = new Scale("min", 1/60.0);     /**     * Scale representing a hours scaling     */    public static final Scale HOUR = new Scale("h", 1/(60.0*60.0));    public static final Scale HOUR2 = new Scale("hour", 1/(60.0*60.0));     /**     * Returns the scaling factor of this Scale object     *     * @return  the scaling factor of this Scale object     */    public double getFactor() {        return factor;    }     /**     * Returns the string representation of this Scale object.     * The string representation is the name of the Scale object.     *     * @return  the string representation of this Scale object     */    public String toString() {        return name;    }     /**     * Maps a string to its corresponding Scale object.     *     * @param   s  a string to match against Scale objects.     * @return     The Scale object matching the given string.     */    public static Scale toScale(String s) {        return map.get(s);    }     /**     * Returns an enumeration of the keys for this enumerated type     *     * @param   s  an string to match against Scale objects.     * @return     The Scale object matching the given string.     */    protected static Set keySet() {        return map.keySet();    }     protected double scale(double value) {        return value/factor;    }}