J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2004 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.tools.jstat; |
| 27 | |
| 28 | import java.util.*; |
| 29 | |
| 30 | /** |
| 31 | * A typesafe enumeration for describing data scaling semantics |
| 32 | * |
| 33 | * @author Brian Doherty |
| 34 | * @since 1.5 |
| 35 | */ |
| 36 | public 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 keySet() { |
| 179 | return map.keySet(); |
| 180 | } |
| 181 | |
| 182 | protected double scale(double value) { |
| 183 | return value/factor; |
| 184 | } |
| 185 | } |