Examples of org.joda.time.MutableDateTime

org.joda.time.MutableDateTime
MutableDateTime is the standard implementation of a modifiable datetime class. It holds the datetime as milliseconds from the Java epoch of 1970-01-01T00:00:00Z.
This class uses a Chronology internally. The Chronology determines how the millisecond instant value is converted into the date time fields. The default Chronology is ISOChronology which is the agreed international standard and compatable with the modern Gregorian calendar.
Each individual field can be accessed in two ways:
- getHourOfDay()
- hourOfDay().get()
The second technique also provides access to other useful methods on the field:
- get numeric value
- set numeric value
- add to numeric value
- add to numeric value wrapping with the field
- get text vlaue
- get short text value
- set text value
- field maximum value
- field minimum value
MutableDateTime is mutable and not thread-safe, unless concurrent threads are not invoking mutator methods. @author Guy Allard @author Brian S O'Neill @author Stephen Colebourne @author Mike Schrag @since 1.0 @see DateTime

    }


    public void testWeekdayNames() {
        DateTimeFormatter printer = DateTimeFormat.forPattern("EEEE");
        for (int i=0; i<ZONES.length; i++) {
            MutableDateTime mdt = new MutableDateTime(2004, 1, 1, 1, 20, 30, 40, ZONES[i]);
            for (int day=1; day<=366; day++) {
                mdt.setDayOfYear(day);
                int weekday = mdt.getDayOfWeek();
                String weekdayText = printer.print(mdt);
                assertEquals(WEEKDAYS[weekday], weekdayText);
            }
        }
    }

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    public void testHalfdayNames() {
        DateTimeFormatter printer = DateTimeFormat.forPattern("a");
        for (int i=0; i<ZONES.length; i++) {
            Chronology chrono = ISOChronology.getInstance(ZONES[i]);
            MutableDateTime mdt = new MutableDateTime(2004, 5, 30, 0, 20, 30, 40, chrono);
            for (int hour=0; hour<24; hour++) {
                mdt.setHourOfDay(hour);
                int halfday = mdt.get(chrono.halfdayOfDay());
                String halfdayText = printer.print(mdt);
                assertEquals(HALFDAYS[halfday], halfdayText);
            }
        }
    }

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        assertEquals(expect, g.withChronology(BUDDHIST_PARIS).parseDateTime("2004-06-09T10:20:30Z"));
    }


    //-----------------------------------------------------------------------
    public void testParseMutableDateTime_simple() {
        MutableDateTime expect = null;
        expect = new MutableDateTime(2004, 6, 9, 11, 20, 30, 0, LONDON);
        assertEquals(expect, g.parseMutableDateTime("2004-06-09T10:20:30Z"));
        
        try {
            g.parseMutableDateTime("ABC");
            fail();

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            fail();
        } catch (IllegalArgumentException ex) {}
    }


    public void testParseMutableDateTime_zone() {
        MutableDateTime expect = null;
        expect = new MutableDateTime(2004, 6, 9, 11, 20, 30, 0, LONDON);
        assertEquals(expect, g.withZone(LONDON).parseMutableDateTime("2004-06-09T10:20:30Z"));
        
        expect = new MutableDateTime(2004, 6, 9, 11, 20, 30, 0, LONDON);
        assertEquals(expect, g.withZone(null).parseMutableDateTime("2004-06-09T10:20:30Z"));
        
        expect = new MutableDateTime(2004, 6, 9, 12, 20, 30, 0, PARIS);
        assertEquals(expect, g.withZone(PARIS).parseMutableDateTime("2004-06-09T10:20:30Z"));
    }

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            from = new DateTime(Long.parseLong(firstTimestamp) * 1000, DateTimeZone.UTC);
        } else {
            from = DateTime.parse(histogram.getHistogramBoundaries().getFrom());
        }
        final DateTime to = DateTime.parse(histogram.getHistogramBoundaries().getTo());
        final MutableDateTime currentTime = new MutableDateTime(from);


        final Duration step = estimateIntervalStep(histogram.getInterval());
        final int dataPoints = (int) ((to.getMillis() - from.getMillis()) / step.getMillis());


        // using the absolute value guarantees, that there will always be enough values for the given resolution
        final int factor = (maxDataPoints != -1 && dataPoints > maxDataPoints) ? dataPoints / maxDataPoints : 1;


        int index = 0;
        floorToBeginningOfInterval(histogram.getInterval(), currentTime);
        while (currentTime.isBefore(to) || currentTime.isEqual(to)) {
            if (index % factor == 0) {
                String timestamp = Long.toString(currentTime.getMillis() / 1000);
                Long result = histogramResults.get(timestamp);
                Map<String, Long> point = Maps.newHashMap();
                point.put("x", Long.parseLong(timestamp));
                point.put("y", result != null ? result : 0);
                points.add(point);

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        assertEquals(ISO, ReadableInstantConverter.INSTANCE.getChronology(new Instant(123L), (DateTimeZone) null));
        assertEquals(ISO, ReadableInstantConverter.INSTANCE.getChronology(new DateTime(123L), (DateTimeZone) null));
        
        assertEquals(ISO_PARIS, ReadableInstantConverter.INSTANCE.getChronology(new DateTime(123L, new MockBadChronology()), PARIS));
        
        MutableDateTime mdt = new MutableDateTime() {
            public Chronology getChronology() {
                return null; // bad
            }
        };
        assertEquals(ISO_PARIS, ReadableInstantConverter.INSTANCE.getChronology(mdt, PARIS));

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    public void testGetChronology_Object_nullChronology() throws Exception {
        assertEquals(ISO.withUTC(), ReadableInstantConverter.INSTANCE.getChronology(new Instant(123L), (Chronology) null));
        assertEquals(ISO, ReadableInstantConverter.INSTANCE.getChronology(new DateTime(123L), (Chronology) null));
        
        MutableDateTime mdt = new MutableDateTime() {
            public Chronology getChronology() {
                return null; // bad
            }
        };
        assertEquals(ISO, ReadableInstantConverter.INSTANCE.getChronology(mdt, (Chronology) null));

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    LocalDate end = new LocalDate();
    LocalDate start = end.minusYears(1);


    List<File> result = new ArrayList<File>();
    IPath[] storagePaths = XmlPlugin.getDefault().getStoragePaths();
    MutableDateTime date = start.toDateTime(new LocalTime(0, 0, 0)).toMutableDateTime();
    while (new LocalDate(date.toInstant().getMillis()).compareTo(end) <= 0) {


      for (IPath path : storagePaths) {
        File f = store.getDataFile(new LocalDate(date.getMillis()), path);
        if (f.exists()) {
          result.add(f);
        }
      }
      date.addMonths(1);
    }
    assertEquals(result.size(), store.getDataFiles(start, end).size());
  }

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      int day = cal.get(Calendar.DAY_OF_MONTH);
      int hours = (hoursInput == null ? 0 : hoursInput % 24);
      int minutes = (minutesInput == null ? 0 : minutesInput);


      // Use the input to create a date object with proper timezone
      MutableDateTime date = new MutableDateTime(year, month, day, hours, minutes, 0, 0,
        DateTimeZone.forTimeZone(getClientTimeZone()));


      // Adjust for halfday if needed
      if (use12HourFormat())
      {
        int halfday = (amOrPmInput == AM_PM.PM ? 1 : 0);
        date.set(DateTimeFieldType.halfdayOfDay(), halfday);
        date.set(DateTimeFieldType.hourOfHalfday(), hours % 12);
      }


      // The date will be in the server's timezone
      setConvertedInput(new Date(date.getMillis()));
    }
    catch (RuntimeException e)
    {
      DateTimeField.this.error(e.getMessage());
      invalid();

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      if (zone != null)
      {
        modelObject = changeTimeZone(modelObject, zone);
      }


      MutableDateTime mDate = new MutableDateTime(modelObject);


      date = mDate.toDate();


      if (use12HourFormat)
      {
        int hourOfHalfDay = mDate.get(DateTimeFieldType.hourOfHalfday());
        hours = hourOfHalfDay == 0 ? 12 : hourOfHalfDay;
      }
      else
      {
        hours = mDate.get(DateTimeFieldType.hourOfDay());
      }


      amOrPm = (mDate.get(DateTimeFieldType.halfdayOfDay()) == 0) ? AM_PM.AM : AM_PM.PM;
      minutes = mDate.getMinuteOfHour();
    }


    super.onBeforeRender();
  }

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