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

        return (str.equals("-")) ? null : str;
    }


    static int parseTime(String str) {
        DateTimeFormatter p = ISODateTimeFormat.hourMinuteSecondFraction();
        MutableDateTime mdt = new MutableDateTime(0, getLenientISOChronology());
        int pos = 0;
        if (str.startsWith("-")) {
            pos = 1;
        }
        int newPos = p.parseInto(mdt, str, pos);
        if (newPos == ~pos) {
            throw new IllegalArgumentException(str);
        }
        int millis = (int)mdt.getMillis();
        if (pos == 1) {
            millis = -millis;
        }
        return millis;
    }

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


    public void testParseMutableDateTime_zone2() {
        MutableDateTime expect = null;
        expect = new MutableDateTime(2004, 6, 9, 11, 20, 30, 0, LONDON);
        assertEquals(expect, g.withZone(LONDON).parseMutableDateTime("2004-06-09T06:20:30-04:00"));
        
        expect = new MutableDateTime(2004, 6, 9, 11, 20, 30, 0, LONDON);
        assertEquals(expect, g.withZone(null).parseMutableDateTime("2004-06-09T06:20:30-04:00"));
        
        expect = new MutableDateTime(2004, 6, 9, 12, 20, 30, 0, PARIS);
        assertEquals(expect, g.withZone(PARIS).parseMutableDateTime("2004-06-09T06:20:30-04:00"));
    }

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        .append(ISODateTimeFormat.date())
        .appendLiteral('T')
        .append(ISODateTimeFormat.timeElementParser())
        .toFormatter();
        
        MutableDateTime expect = null;
        expect = new MutableDateTime(2004, 6, 9, 10, 20, 30, 0, LONDON);
        assertEquals(expect, h.withZone(LONDON).parseMutableDateTime("2004-06-09T10:20:30"));
        
        expect = new MutableDateTime(2004, 6, 9, 10, 20, 30, 0, LONDON);
        assertEquals(expect, h.withZone(null).parseMutableDateTime("2004-06-09T10:20:30"));
        
        expect = new MutableDateTime(2004, 6, 9, 10, 20, 30, 0, PARIS);
        assertEquals(expect, h.withZone(PARIS).parseMutableDateTime("2004-06-09T10:20:30"));
    }

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        expect = new MutableDateTime(2004, 6, 9, 10, 20, 30, 0, PARIS);
        assertEquals(expect, h.withZone(PARIS).parseMutableDateTime("2004-06-09T10:20:30"));
    }


    public void testParseMutableDateTime_simple_precedence() {
        MutableDateTime expect = null;
        // use correct day of week
        expect = new MutableDateTime(2004, 6, 9, 11, 20, 30, 0, LONDON);
        assertEquals(expect, f.parseDateTime("Wed 2004-06-09T10:20:30Z"));
        
        // use wrong day of week
        expect = new MutableDateTime(2004, 6, 7, 11, 20, 30, 0, LONDON);
        // DayOfWeek takes precedence, because week < month in length
        assertEquals(expect, f.parseDateTime("Mon 2004-06-09T10:20:30Z"));
    }

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        // DayOfWeek takes precedence, because week < month in length
        assertEquals(expect, f.parseDateTime("Mon 2004-06-09T10:20:30Z"));
    }


    public void testParseMutableDateTime_offsetParsed() {
        MutableDateTime expect = null;
        expect = new MutableDateTime(2004, 6, 9, 10, 20, 30, 0, UTC);
        assertEquals(expect, g.withOffsetParsed().parseMutableDateTime("2004-06-09T10:20:30Z"));
        
        expect = new MutableDateTime(2004, 6, 9, 6, 20, 30, 0, DateTimeZone.forOffsetHours(-4));
        assertEquals(expect, g.withOffsetParsed().parseMutableDateTime("2004-06-09T06:20:30-04:00"));
        
        expect = new MutableDateTime(2004, 6, 9, 10, 20, 30, 0, UTC);
        assertEquals(expect, g.withZone(PARIS).withOffsetParsed().parseMutableDateTime("2004-06-09T10:20:30Z"));
        expect = new MutableDateTime(2004, 6, 9, 12, 20, 30, 0, PARIS);
        assertEquals(expect, g.withOffsetParsed().withZone(PARIS).parseMutableDateTime("2004-06-09T10:20:30Z"));
    }

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        expect = new MutableDateTime(2004, 6, 9, 12, 20, 30, 0, PARIS);
        assertEquals(expect, g.withOffsetParsed().withZone(PARIS).parseMutableDateTime("2004-06-09T10:20:30Z"));
    }


    public void testParseMutableDateTime_chrono() {
        MutableDateTime expect = null;
        expect = new MutableDateTime(2004, 6, 9, 12, 20, 30, 0, PARIS);
        assertEquals(expect, g.withChronology(ISO_PARIS).parseMutableDateTime("2004-06-09T10:20:30Z"));
        
        expect = new MutableDateTime(2004, 6, 9, 11, 20, 30, 0,LONDON);
        assertEquals(expect, g.withChronology(null).parseMutableDateTime("2004-06-09T10:20:30Z"));
        
        expect = new MutableDateTime(2547, 6, 9, 12, 20, 30, 0, BUDDHIST_PARIS);
        assertEquals(expect, g.withChronology(BUDDHIST_PARIS).parseMutableDateTime("2547-06-09T10:20:30Z"));
        
        expect = new MutableDateTime(2004, 6, 9, 10, 29, 51, 0, BUDDHIST_PARIS); // zone is +00:09:21 in 1451
        assertEquals(expect, g.withChronology(BUDDHIST_PARIS).parseMutableDateTime("2004-06-09T10:20:30Z"));
    }

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


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

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        assertEquals(~10, g.parseInto(result, "2004-06-09", 0));
        assertEquals(~13, g.parseInto(result, "XX2004-06-09T", 2));
    }


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

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        assertEquals(20, g.withZone(PARIS).parseInto(result, "2004-06-09T10:20:30Z", 0));
        assertEquals(expect, result);
    }


    public void testParseInto_zone2() {
        MutableDateTime expect = null;
        MutableDateTime result = null;
        expect = new MutableDateTime(2004, 6, 9, 11, 20, 30, 0, LONDON);
        result = new MutableDateTime(0L);
        assertEquals(25, g.withZone(LONDON).parseInto(result, "2004-06-09T06:20:30-04:00", 0));
        assertEquals(expect, result);
        
        expect = new MutableDateTime(2004, 6, 9, 11, 20, 30, 0, LONDON);
        assertEquals(25, g.withZone(null).parseInto(result, "2004-06-09T06:20:30-04:00", 0));
        assertEquals(expect, result);
        
        expect = new MutableDateTime(2004, 6, 9, 12, 20, 30, 0, PARIS);
        assertEquals(25, g.withZone(PARIS).parseInto(result, "2004-06-09T06:20:30-04:00", 0));
        assertEquals(expect, result);
    }

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        .append(ISODateTimeFormat.date())
        .appendLiteral('T')
        .append(ISODateTimeFormat.timeElementParser())
        .toFormatter();
        
        MutableDateTime expect = null;
        MutableDateTime result = null;
        expect = new MutableDateTime(2004, 6, 9, 10, 20, 30, 0, LONDON);
        result = new MutableDateTime(0L);
        assertEquals(19, h.withZone(LONDON).parseInto(result, "2004-06-09T10:20:30", 0));
        assertEquals(expect, result);
        
        expect = new MutableDateTime(2004, 6, 9, 10, 20, 30, 0, LONDON);
        result = new MutableDateTime(0L);
        assertEquals(19, h.withZone(null).parseInto(result, "2004-06-09T10:20:30", 0));
        assertEquals(expect, result);
        
        expect = new MutableDateTime(2004, 6, 9, 10, 20, 30, 0, PARIS);
        result = new MutableDateTime(0L);
        assertEquals(19, h.withZone(PARIS).parseInto(result, "2004-06-09T10:20:30", 0));
        assertEquals(expect, result);
    }

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