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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 
Scale(String name, double factor)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      */
getFactor()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      */
toString()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      */
toScale(String s)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      */
keySet()178     protected static Set<String> keySet() {
179         return map.keySet();
180     }
181 
scale(double value)182     protected double scale(double value) {
183         return value/factor;
184     }
185 }
186