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Java > Open Source Codes > net > sourceforge > cruisecontrol > util > TimeNumberFormat


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37 package net.sourceforge.cruisecontrol.util;
38
39 import java.text.DateFormat JavaDoc;
40 import java.text.FieldPosition JavaDoc;
41 import java.text.NumberFormat JavaDoc;
42 import java.text.ParsePosition JavaDoc;
43 import java.text.SimpleDateFormat JavaDoc;
44 import java.util.Date JavaDoc;
45 import java.util.TimeZone JavaDoc;
46
47 /**
48  * A custom formatter that will take numbers and display them as if they were timestamps (<em>not</em> date stamps).
49  * To achieve this, it actually delegates down to a DateFormatter (using a format of HH:mm). This date formatter is
50  * configured to work on UTC time, as a number value of 0 represents midnight.
51  *
52  * @author <a HREF="mailto:robertdw@users.sourceforge.net">Robert Watkins</a>
53  */
54 public final class TimeNumberFormat extends NumberFormat JavaDoc {
55         private static final String JavaDoc UTC_TIME_ZONE = "+0:00";
56         private static final String JavaDoc HOURS_MINUTE = "HH:mm";
57         
58         private final DateFormat JavaDoc realFormat;
59         
60         /** Initialise the formatter */
61         public TimeNumberFormat() {
62             SimpleDateFormat JavaDoc format = new SimpleDateFormat JavaDoc(HOURS_MINUTE);
63             format.setTimeZone(TimeZone.getTimeZone(UTC_TIME_ZONE));
64             realFormat = format;
65         }
66         
67         /** Delegates down to date format */
68         public StringBuffer JavaDoc format(double arg0, StringBuffer JavaDoc arg1,
69                 FieldPosition JavaDoc arg2) {
70             return realFormat.format(new Date JavaDoc((long) arg0), arg1, arg2);
71         }
72         
73         /** Delegates down to date format */
74         public StringBuffer JavaDoc format(long arg0, StringBuffer JavaDoc arg1,
75                 FieldPosition JavaDoc arg2) {
76             return realFormat.format(new Date JavaDoc(arg0), arg1, arg2);
77         }
78         
79         /** Delegates down to date format */
80         public Number JavaDoc parse(String JavaDoc arg0, ParsePosition JavaDoc arg1) {
81             return new Long JavaDoc(realFormat.parse(arg0, arg1).getTime());
82         }
83 }
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