1/* 2 * Copyright (c) 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.tools.jstat; 27 28import java.util.*; 29 30/** 31 * A typesafe enumeration for describing data scaling semantics 32 * 33 * @author Brian Doherty 34 * @since 1.5 35 */ 36public class Scale { 37 private static int nextOrdinal = 0; 38 private static HashMap<String, Scale> map = new HashMap<String, Scale>(); 39 40 private final String name; 41 private final int ordinal = nextOrdinal++; 42 private final double factor; 43 44 private Scale(String name, double factor) { 45 this.name = name; 46 this.factor = factor; 47 assert !map.containsKey(name); 48 map.put(name, this); 49 } 50 51 /** 52 * Scale representing a no scaling 53 */ 54 public static final Scale RAW = new Scale("raw", 1); 55 56 /** 57 * Scale representing a percent scaling 58 */ 59 public static final Scale PERCENT = new Scale("percent", 1/100); 60 61 /** 62 * Scale representing a kilo scaling 63 */ 64 public static final Scale KILO = new Scale("K", 1024); 65 66 /** 67 * Scale representing a mega scaling 68 */ 69 public static final Scale MEGA = new Scale("M", 1024*1024); 70 71 /** 72 * Scale representing a giga scaling 73 */ 74 public static final Scale GIGA = new Scale("G", 1024*1024*1024); 75 76 /** 77 * Scale representing a tera scaling 78 */ 79 public static final Scale TERA = new Scale("T", 1024*1024*1024*1024); 80 81 /** 82 * Scale representing a tera scaling 83 */ 84 public static final Scale PETA = new Scale("P", 1024*1024*1024*1024*1024); 85 86 /** 87 * Scale representing a pico scaling 88 */ 89 public static final Scale PICO = new Scale("p", 10.0E-12); 90 91 /** 92 * Scale representing a nano scaling 93 */ 94 public static final Scale NANO = new Scale("n", 10.0E-9); 95 96 /** 97 * Scale representing a micro scaling 98 */ 99 public static final Scale MICRO = new Scale("u", 10.0E-6); 100 101 /** 102 * Scale representing a milli scaling 103 */ 104 public static final Scale MILLI = new Scale("m", 10.0E-3); 105 106 /** 107 * Scale representing a picosecond scaling 108 */ 109 public static final Scale PSEC = new Scale("ps", 10.0E-12); 110 111 /** 112 * Scale representing a nanosecond scaling 113 */ 114 public static final Scale NSEC = new Scale("ns", 10.0E-9); 115 116 /** 117 * Scale representing a microsecond scaling 118 */ 119 public static final Scale USEC = new Scale("us", 10.0E-6); 120 121 /** 122 * Scale representing a millisecond scaling 123 */ 124 public static final Scale MSEC = new Scale("ms", 10.0E-3); 125 126 /** 127 * Scale representing a second scaling 128 */ 129 public static final Scale SEC = new Scale("s", 1); 130 public static final Scale SEC2 = new Scale("sec", 1); 131 132 /** 133 * Scale representing a minutes scaling 134 */ 135 public static final Scale MINUTES = new Scale("min", 1/60.0); 136 137 /** 138 * Scale representing a hours scaling 139 */ 140 public static final Scale HOUR = new Scale("h", 1/(60.0*60.0)); 141 public static final Scale HOUR2 = new Scale("hour", 1/(60.0*60.0)); 142 143 /** 144 * Returns the scaling factor of this Scale object 145 * 146 * @return the scaling factor of this Scale object 147 */ 148 public double getFactor() { 149 return factor; 150 } 151 152 /** 153 * Returns the string representation of this Scale object. 154 * The string representation is the name of the Scale object. 155 * 156 * @return the string representation of this Scale object 157 */ 158 public String toString() { 159 return name; 160 } 161 162 /** 163 * Maps a string to its corresponding Scale object. 164 * 165 * @param s a string to match against Scale objects. 166 * @return The Scale object matching the given string. 167 */ 168 public static Scale toScale(String s) { 169 return map.get(s); 170 } 171 172 /** 173 * Returns an enumeration of the keys for this enumerated type 174 * 175 * @param s an string to match against Scale objects. 176 * @return The Scale object matching the given string. 177 */ 178 protected static Set<String> keySet() { 179 return map.keySet(); 180 } 181 182 protected double scale(double value) { 183 return value/factor; 184 } 185} 186