Examples of org.joda.time.DurationField

org.joda.time.DurationField
Defines the calculation engine for duration fields. The interface defines a set of methods that manipulate a millisecond duration with regards to a single field, such as months or seconds.
This design is extensible so, if you wish, you can extract a different field from the millisecond duration. A number of standard implementations are provided to assist. @author Stephen Colebourne @author Brian S O'Neill @since 1.0

        DateTime dtStart = new DateTime(start, GJChronology.getInstance(DateTimeZone.UTC));
        DateTime dtEnd = new DateTime(end, GJChronology.getInstance(DateTimeZone.UTC));
        assertEquals(dtEnd, dtStart.withFieldAdded(type, amt));
        assertEquals(dtStart, dtEnd.withFieldAdded(type, -amt));


        DurationField field = type.getField(GJChronology.getInstance(DateTimeZone.UTC));
        int diff = field.getDifference(dtEnd.getMillis(), dtStart.getMillis());
        assertEquals(amt, diff);
        
        if (type == DurationFieldType.years() ||
            type == DurationFieldType.months() ||
            type == DurationFieldType.days()) {

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        DateTime dtStart = new DateTime(start, ISOChronology.getInstanceUTC());
        DateTime dtEnd = new DateTime(end, ISOChronology.getInstanceUTC());
        assertEquals(dtEnd, dtStart.withFieldAdded(type, amt));
        assertEquals(dtStart, dtEnd.withFieldAdded(type, -amt));


        DurationField field = type.getField(ISOChronology.getInstanceUTC());
        int diff = field.getDifference(dtEnd.getMillis(), dtStart.getMillis());
        assertEquals(amt, diff);
        
        if (type == DurationFieldType.years() ||
            type == DurationFieldType.months() ||
            type == DurationFieldType.days()) {

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        DateTime dt97 = new DateTime(1997, 10, 2, 0, 0, 0, 0, ETHIOPIC_UTC);
        DateTime dt98 = new DateTime(1998, 10, 2, 0, 0, 0, 0, ETHIOPIC_UTC);
        DateTime dt99 = new DateTime(1999, 10, 2, 0, 0, 0, 0, ETHIOPIC_UTC);
        DateTime dt00 = new DateTime(2000, 10, 2, 0, 0, 0, 0, ETHIOPIC_UTC);
        
        DurationField fld = dt96.year().getDurationField();
        assertEquals(ETHIOPIC_UTC.years(), fld);
        assertEquals(1L * 365L * MILLIS_PER_DAY, fld.getMillis(1, dt96.getMillis()));
        assertEquals(2L * 365L * MILLIS_PER_DAY, fld.getMillis(2, dt96.getMillis()));
        assertEquals(3L * 365L * MILLIS_PER_DAY, fld.getMillis(3, dt96.getMillis()));
        assertEquals((4L * 365L + 1L) * MILLIS_PER_DAY, fld.getMillis(4, dt96.getMillis()));
        
        assertEquals(((4L * 365L + 1L) * MILLIS_PER_DAY) / 4, fld.getMillis(1));
        assertEquals(((4L * 365L + 1L) * MILLIS_PER_DAY) / 2, fld.getMillis(2));
        
        assertEquals(1L * 365L * MILLIS_PER_DAY, fld.getMillis(1L, dt96.getMillis()));
        assertEquals(2L * 365L * MILLIS_PER_DAY, fld.getMillis(2L, dt96.getMillis()));
        assertEquals(3L * 365L * MILLIS_PER_DAY, fld.getMillis(3L, dt96.getMillis()));
        assertEquals((4L * 365L + 1L) * MILLIS_PER_DAY, fld.getMillis(4L, dt96.getMillis()));
        
        assertEquals(((4L * 365L + 1L) * MILLIS_PER_DAY) / 4, fld.getMillis(1L));
        assertEquals(((4L * 365L + 1L) * MILLIS_PER_DAY) / 2, fld.getMillis(2L));
        
        assertEquals(((4L * 365L + 1L) * MILLIS_PER_DAY) / 4, fld.getUnitMillis());
        
        assertEquals(0, fld.getValue(1L * 365L * MILLIS_PER_DAY - 1L, dt96.getMillis()));
        assertEquals(1, fld.getValue(1L * 365L * MILLIS_PER_DAY, dt96.getMillis()));
        assertEquals(1, fld.getValue(1L * 365L * MILLIS_PER_DAY + 1L, dt96.getMillis()));
        assertEquals(1, fld.getValue(2L * 365L * MILLIS_PER_DAY - 1L, dt96.getMillis()));
        assertEquals(2, fld.getValue(2L * 365L * MILLIS_PER_DAY, dt96.getMillis()));
        assertEquals(2, fld.getValue(2L * 365L * MILLIS_PER_DAY + 1L, dt96.getMillis()));
        assertEquals(2, fld.getValue(3L * 365L * MILLIS_PER_DAY - 1L, dt96.getMillis()));
        assertEquals(3, fld.getValue(3L * 365L * MILLIS_PER_DAY, dt96.getMillis()));
        assertEquals(3, fld.getValue(3L * 365L * MILLIS_PER_DAY + 1L, dt96.getMillis()));
        assertEquals(3, fld.getValue((4L * 365L + 1L) * MILLIS_PER_DAY - 1L, dt96.getMillis()));
        assertEquals(4, fld.getValue((4L * 365L + 1L) * MILLIS_PER_DAY, dt96.getMillis()));
        assertEquals(4, fld.getValue((4L * 365L + 1L) * MILLIS_PER_DAY + 1L, dt96.getMillis()));
        
        assertEquals(dt97.getMillis(), fld.add(dt96.getMillis(), 1));
        assertEquals(dt98.getMillis(), fld.add(dt96.getMillis(), 2));
        assertEquals(dt99.getMillis(), fld.add(dt96.getMillis(), 3));
        assertEquals(dt00.getMillis(), fld.add(dt96.getMillis(), 4));
        
        assertEquals(dt97.getMillis(), fld.add(dt96.getMillis(), 1L));
        assertEquals(dt98.getMillis(), fld.add(dt96.getMillis(), 2L));
        assertEquals(dt99.getMillis(), fld.add(dt96.getMillis(), 3L));
        assertEquals(dt00.getMillis(), fld.add(dt96.getMillis(), 4L));
    }

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        DateTime dt11 = new DateTime(1999, 11, 2, 0, 0, 0, 0, ETHIOPIC_UTC);
        DateTime dt12 = new DateTime(1999, 12, 2, 0, 0, 0, 0, ETHIOPIC_UTC);
        DateTime dt13 = new DateTime(1999, 13, 2, 0, 0, 0, 0, ETHIOPIC_UTC);
        DateTime dt01 = new DateTime(2000, 1, 2, 0, 0, 0, 0, ETHIOPIC_UTC);
        
        DurationField fld = dt11.monthOfYear().getDurationField();
        assertEquals(ETHIOPIC_UTC.months(), fld);
        assertEquals(1L * 30L * MILLIS_PER_DAY, fld.getMillis(1, dt11.getMillis()));
        assertEquals(2L * 30L * MILLIS_PER_DAY, fld.getMillis(2, dt11.getMillis()));
        assertEquals((2L * 30L + 6L) * MILLIS_PER_DAY, fld.getMillis(3, dt11.getMillis()));
        assertEquals((3L * 30L + 6L) * MILLIS_PER_DAY, fld.getMillis(4, dt11.getMillis()));
        
        assertEquals(1L * 30L * MILLIS_PER_DAY, fld.getMillis(1));
        assertEquals(2L * 30L * MILLIS_PER_DAY, fld.getMillis(2));
        assertEquals(13L * 30L * MILLIS_PER_DAY, fld.getMillis(13));
        
        assertEquals(1L * 30L * MILLIS_PER_DAY, fld.getMillis(1L, dt11.getMillis()));
        assertEquals(2L * 30L * MILLIS_PER_DAY, fld.getMillis(2L, dt11.getMillis()));
        assertEquals((2L * 30L + 6L) * MILLIS_PER_DAY, fld.getMillis(3L, dt11.getMillis()));
        assertEquals((3L * 30L + 6L) * MILLIS_PER_DAY, fld.getMillis(4L, dt11.getMillis()));
        
        assertEquals(1L * 30L * MILLIS_PER_DAY, fld.getMillis(1L));
        assertEquals(2L * 30L * MILLIS_PER_DAY, fld.getMillis(2L));
        assertEquals(13L * 30L * MILLIS_PER_DAY, fld.getMillis(13L));
        
        assertEquals(0, fld.getValue(1L * 30L * MILLIS_PER_DAY - 1L, dt11.getMillis()));
        assertEquals(1, fld.getValue(1L * 30L * MILLIS_PER_DAY, dt11.getMillis()));
        assertEquals(1, fld.getValue(1L * 30L * MILLIS_PER_DAY + 1L, dt11.getMillis()));
        assertEquals(1, fld.getValue(2L * 30L * MILLIS_PER_DAY - 1L, dt11.getMillis()));
        assertEquals(2, fld.getValue(2L * 30L * MILLIS_PER_DAY, dt11.getMillis()));
        assertEquals(2, fld.getValue(2L * 30L * MILLIS_PER_DAY + 1L, dt11.getMillis()));
        assertEquals(2, fld.getValue((2L * 30L + 6L) * MILLIS_PER_DAY - 1L, dt11.getMillis()));
        assertEquals(3, fld.getValue((2L * 30L + 6L) * MILLIS_PER_DAY, dt11.getMillis()));
        assertEquals(3, fld.getValue((2L * 30L + 6L) * MILLIS_PER_DAY + 1L, dt11.getMillis()));
        assertEquals(3, fld.getValue((3L * 30L + 6L) * MILLIS_PER_DAY - 1L, dt11.getMillis()));
        assertEquals(4, fld.getValue((3L * 30L + 6L) * MILLIS_PER_DAY, dt11.getMillis()));
        assertEquals(4, fld.getValue((3L * 30L + 6L) * MILLIS_PER_DAY + 1L, dt11.getMillis()));
        
        assertEquals(dt12.getMillis(), fld.add(dt11.getMillis(), 1));
        assertEquals(dt13.getMillis(), fld.add(dt11.getMillis(), 2));
        assertEquals(dt01.getMillis(), fld.add(dt11.getMillis(), 3));
        
        assertEquals(dt12.getMillis(), fld.add(dt11.getMillis(), 1L));
        assertEquals(dt13.getMillis(), fld.add(dt11.getMillis(), 2L));
        assertEquals(dt01.getMillis(), fld.add(dt11.getMillis(), 3L));
    }

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    //-----------------------------------------------------------------------
    public void test_equals() {
        assertEquals(true, iField.equals(iField));
        assertEquals(false, iField.equals(ISOChronology.getInstance().minutes()));
        DurationField dummy = new PreciseDurationField(DurationFieldType.seconds(), 0);
        assertEquals(false, iField.equals(dummy));
        dummy = new PreciseDurationField(DurationFieldType.seconds(), 1000);
        assertEquals(true, iField.equals(dummy));
        dummy = new PreciseDurationField(DurationFieldType.millis(), 1000);
        assertEquals(false, iField.equals(dummy));

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    }


    public void test_hashCode() {
        assertEquals(true, iField.hashCode() == iField.hashCode());
        assertEquals(false, iField.hashCode() == ISOChronology.getInstance().minutes().hashCode());
        DurationField dummy = new PreciseDurationField(DurationFieldType.seconds(), 0);
        assertEquals(false, iField.hashCode() == dummy.hashCode());
        dummy = new PreciseDurationField(DurationFieldType.seconds(), 1000);
        assertEquals(true, iField.hashCode() == dummy.hashCode());
        dummy = new PreciseDurationField(DurationFieldType.millis(), 1000);
        assertEquals(false, iField.hashCode() == dummy.hashCode());
    }

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    //-----------------------------------------------------------------------
    public void test_compareTo() {
        assertEquals(0, iField.compareTo(iField));
        assertEquals(-1, iField.compareTo(ISOChronology.getInstance().minutes()));
        DurationField dummy = new PreciseDurationField(DurationFieldType.seconds(), 0);
        assertEquals(1, iField.compareTo(dummy));
//        try {
//            iField.compareTo("");
//            fail();
//        } catch (ClassCastException ex) {}

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        } catch (NullPointerException ex) {}
    }


    //-----------------------------------------------------------------------
    public void testSerialization() throws Exception {
        DurationField test = iField;
        
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);
        oos.writeObject(test);
        byte[] bytes = baos.toByteArray();
        oos.close();
        
        ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
        ObjectInputStream ois = new ObjectInputStream(bais);
        DurationField result = (DurationField) ois.readObject();
        ois.close();
        
        assertEquals(test, result);
    }

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    public TestScaledDurationField(String name) {
        super(name);
    }


    protected void setUp() throws Exception {
        DurationField base = MillisDurationField.INSTANCE;
        iField = new ScaledDurationField(base, DurationFieldType.minutes(), 90);
    }

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    //-----------------------------------------------------------------------
    public void test_equals() {
        assertEquals(true, iField.equals(iField));
        assertEquals(false, iField.equals(ISOChronology.getInstance().minutes()));
        DurationField dummy = new ScaledDurationField(MillisDurationField.INSTANCE, DurationFieldType.minutes(), 2);
        assertEquals(false, iField.equals(dummy));
        dummy = new ScaledDurationField(MillisDurationField.INSTANCE, DurationFieldType.minutes(), 90);
        assertEquals(true, iField.equals(dummy));
        dummy = new ScaledDurationField(MillisDurationField.INSTANCE, DurationFieldType.millis(), 90);
        assertEquals(false, iField.equals(dummy));

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org.joda.time.chrono.AssembledChronology

org.joda.time.chrono.AssembledChronology$Fields

org.joda.time.chrono.BaseChronology

org.joda.time.chrono.GJChronology$CutoverField

org.joda.time.chrono.TestCopticChronology

org.joda.time.chrono.TestEthiopicChronology

org.joda.time.chrono.TestGJChronology

org.joda.time.chrono.TestISOChronology

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