jars/icu4j-4_4_2-src/main/classes/core/src/com/ibm/icu/impl/duration/BasicDurationFormat.java

   1 /*\r
   2  *******************************************************************************\r
   3  * Copyright (C) 2007-2009, International Business Machines Corporation and    *\r
   4  * others. All Rights Reserved.                                                *\r
   5  *******************************************************************************\r
   6  */\r
   7 package com.ibm.icu.impl.duration;\r
   8 \r
   9 import java.text.FieldPosition;\r
  10 import java.util.Date;\r
  11 \r
  12 import com.ibm.icu.text.DurationFormat;\r
  13 import com.ibm.icu.util.ULocale;\r
  14 \r
  15 /**\r
  16  * @author srl\r
  17  */\r
  18 public class BasicDurationFormat extends DurationFormat {\r
  19     \r
  20     /**\r
  21      * \r
  22      */\r
  23     private static final long serialVersionUID = -3146984141909457700L;\r
  24     \r
  25     transient DurationFormatter formatter;\r
  26     transient PeriodFormatter pformatter;\r
  27     transient PeriodFormatterService pfs = null;\r
  28 \r
  29     public static BasicDurationFormat getInstance(ULocale locale) {\r
  30         return new BasicDurationFormat(locale);\r
  31     }\r
  32 \r
  33     private static boolean checkXMLDuration = true; \r
  34 \r
  35     public StringBuffer format(Object object, StringBuffer toAppend, FieldPosition pos) {\r
  36         if(object instanceof Long) {\r
  37             String res = formatDurationFromNow(((Long)object).longValue());\r
  38             return toAppend.append(res);\r
  39         } else if(object instanceof Date) {\r
  40             String res = formatDurationFromNowTo(((Date)object));\r
  41             return toAppend.append(res);\r
  42         }\r
  43         if(checkXMLDuration) try {\r
  44             if(object instanceof javax.xml.datatype.Duration) {\r
  45                 String res = formatDuration(object);\r
  46                 return toAppend.append(res);\r
  47             }\r
  48         } catch ( NoClassDefFoundError ncdfe ) {\r
  49             System.err.println("Skipping XML capability");\r
  50             checkXMLDuration = false; // don't try again\r
  51         }\r
  52         throw new IllegalArgumentException("Cannot format given Object as a Duration");\r
  53 \r
  54     }\r
  55     \r
  56     public BasicDurationFormat() {\r
  57         pfs = BasicPeriodFormatterService.getInstance();\r
  58         formatter = pfs.newDurationFormatterFactory().getFormatter();\r
  59         pformatter = pfs.newPeriodFormatterFactory().setDisplayPastFuture(false).getFormatter();\r
  60     }\r
  61     /**\r
  62      * \r
  63      */\r
  64     public BasicDurationFormat(ULocale locale) {\r
  65         super(locale);\r
  66         pfs = BasicPeriodFormatterService.getInstance();\r
  67         formatter = pfs.newDurationFormatterFactory().setLocale(locale.getName()).getFormatter();\r
  68         pformatter = pfs.newPeriodFormatterFactory().setDisplayPastFuture(false).setLocale(locale.getName()).getFormatter();\r
  69     }\r
  70 \r
  71     /* (non-Javadoc)\r
  72      * @see com.ibm.icu.text.DurationFormat#formatDurationFrom(long, long)\r
  73      */\r
  74     public String formatDurationFrom(long duration, long referenceDate) {\r
  75         return formatter.formatDurationFrom(duration, referenceDate);\r
  76     }\r
  77 \r
  78     /* (non-Javadoc)\r
  79      * @see com.ibm.icu.text.DurationFormat#formatDurationFromNow(long)\r
  80      */\r
  81     public String formatDurationFromNow(long duration) {\r
  82         return formatter.formatDurationFromNow(duration);\r
  83     }\r
  84 \r
  85     /* (non-Javadoc)\r
  86      * @see com.ibm.icu.text.DurationFormat#formatDurationFromNowTo(java.util.Date)\r
  87      */\r
  88     public String formatDurationFromNowTo(Date targetDate) {\r
  89         return formatter.formatDurationFromNowTo(targetDate);\r
  90     }\r
  91 \r
  92     /** \r
  93      *  JDK 1.5+ only\r
  94      * @param obj Object being passed.\r
  95      * @return The PeriodFormatter object formatted to the object passed.\r
  96      * @see "http://java.sun.com/j2se/1.5.0/docs/api/javax/xml/datatype/Duration.html"\r
  97      */\r
  98     public String formatDuration(Object obj) {\r
  99         javax.xml.datatype.DatatypeConstants.Field inFields[] = { \r
 100                 javax.xml.datatype.DatatypeConstants.YEARS,\r
 101                 javax.xml.datatype.DatatypeConstants.MONTHS,\r
 102                 javax.xml.datatype.DatatypeConstants.DAYS,\r
 103                 javax.xml.datatype.DatatypeConstants.HOURS,\r
 104                 javax.xml.datatype.DatatypeConstants.MINUTES,\r
 105                 javax.xml.datatype.DatatypeConstants.SECONDS,\r
 106             };\r
 107              TimeUnit outFields[] = { \r
 108                 TimeUnit.YEAR,\r
 109                 TimeUnit.MONTH,\r
 110                 TimeUnit.DAY,\r
 111                 TimeUnit.HOUR,\r
 112                 TimeUnit.MINUTE,\r
 113                 TimeUnit.SECOND,\r
 114             };\r
 115 \r
 116         javax.xml.datatype.Duration inDuration = (javax.xml.datatype.Duration)obj;\r
 117         Period p = null;\r
 118         javax.xml.datatype.Duration duration = inDuration;\r
 119         boolean inPast = false;\r
 120         if(inDuration.getSign()<0) {\r
 121             duration = inDuration.negate();\r
 122             inPast = true;\r
 123         }\r
 124         // convert a Duration to a Period\r
 125         boolean sawNonZero = false; // did we have a set, non-zero field?\r
 126         for(int i=0;i<inFields.length;i++) {\r
 127             if(duration.isSet(inFields[i])) {\r
 128                 Number n = duration.getField(inFields[i]);\r
 129                 if(n.intValue() == 0 && !sawNonZero) {\r
 130                     continue; // ignore zero fields larger than the largest nonzero field\r
 131                 } else {\r
 132                     sawNonZero = true;\r
 133                 }\r
 134                 float floatVal = n.floatValue();\r
 135                 // is there a 'secondary' unit to set?\r
 136                 TimeUnit alternateUnit = null;\r
 137                 float alternateVal = 0;\r
 138                 \r
 139                 // see if there is a fractional part\r
 140                 if(outFields[i]==TimeUnit.SECOND) {\r
 141                     double fullSeconds = floatVal;\r
 142                     double intSeconds = Math.floor(floatVal);\r
 143                     double millis = (fullSeconds-intSeconds)*1000.0;\r
 144                     if(millis > 0.0) {\r
 145                         alternateUnit = TimeUnit.MILLISECOND;\r
 146                         alternateVal=(float)millis;\r
 147                         floatVal=(float)intSeconds;\r
 148                     }\r
 149                 }\r
 150                 \r
 151                 if(p == null) {\r
 152                     p = Period.at(floatVal, outFields[i]);\r
 153                 } else {\r
 154                     p = p.and(floatVal, outFields[i]);\r
 155                 }\r
 156                 \r
 157                 if(alternateUnit != null) {\r
 158                     p = p.and(alternateVal, alternateUnit); // add in MILLISECONDs\r
 159                 }\r
 160             }\r
 161         }\r
 162         \r
 163         if(p == null) {\r
 164             // no fields set  = 0 seconds\r
 165             return formatDurationFromNow(0);\r
 166         } else {\r
 167             if(inPast) {// was negated, above.\r
 168                 p = p.inPast();\r
 169             } else {\r
 170                 p = p.inFuture();\r
 171             }\r
 172         }\r
 173         \r
 174         // now, format it.\r
 175         return pformatter.format(p);\r
 176     }\r
 177 }\r