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

    }


    public void test_hashCode() {
        assertEquals(iField.hashCode(), iField.hashCode());
        assertEquals(false, iField.hashCode() == ISOChronology.getInstance().minutes().hashCode());
        DurationField dummy = new ScaledDurationField(MillisDurationField.INSTANCE, DurationFieldType.minutes(), 2);
        assertEquals(false, iField.hashCode() == dummy.hashCode());
        dummy = new ScaledDurationField(MillisDurationField.INSTANCE, DurationFieldType.minutes(), 90);
        assertEquals(true, iField.hashCode() == dummy.hashCode());
        dummy = new ScaledDurationField(MillisDurationField.INSTANCE, DurationFieldType.millis(), 90);
        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.minutes(), 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 void test_compareTo() {
        assertEquals(0, MillisDurationField.INSTANCE.compareTo(MillisDurationField.INSTANCE));
        assertEquals(-1, MillisDurationField.INSTANCE.compareTo(ISOChronology.getInstance().seconds()));
        DurationField dummy = new PreciseDurationField(DurationFieldType.seconds(), 0);
        assertEquals(1, MillisDurationField.INSTANCE.compareTo(dummy));
//        try {
//            MillisDurationField.INSTANCE.compareTo("");
//            fail();
//        } catch (ClassCastException ex) {}

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        } catch (NullPointerException ex) {}
    }


    //-----------------------------------------------------------------------
    public void testSerialization() throws Exception {
        DurationField test = MillisDurationField.INSTANCE;
        
        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();
        
        assertSame(test, result);
    }

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        DateTime dt21 = new DateTime(1721, 10, 2, 0, 0, 0, 0, COPTIC_UTC);
        DateTime dt22 = new DateTime(1722, 10, 2, 0, 0, 0, 0, COPTIC_UTC);
        DateTime dt23 = new DateTime(1723, 10, 2, 0, 0, 0, 0, COPTIC_UTC);
        DateTime dt24 = new DateTime(1724, 10, 2, 0, 0, 0, 0, COPTIC_UTC);
        
        DurationField fld = dt20.year().getDurationField();
        assertEquals(COPTIC_UTC.years(), fld);
        assertEquals(1L * 365L * MILLIS_PER_DAY, fld.getMillis(1, dt20.getMillis()));
        assertEquals(2L * 365L * MILLIS_PER_DAY, fld.getMillis(2, dt20.getMillis()));
        assertEquals(3L * 365L * MILLIS_PER_DAY, fld.getMillis(3, dt20.getMillis()));
        assertEquals((4L * 365L + 1L) * MILLIS_PER_DAY, fld.getMillis(4, dt20.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, dt20.getMillis()));
        assertEquals(2L * 365L * MILLIS_PER_DAY, fld.getMillis(2L, dt20.getMillis()));
        assertEquals(3L * 365L * MILLIS_PER_DAY, fld.getMillis(3L, dt20.getMillis()));
        assertEquals((4L * 365L + 1L) * MILLIS_PER_DAY, fld.getMillis(4L, dt20.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, dt20.getMillis()));
        assertEquals(1, fld.getValue(1L * 365L * MILLIS_PER_DAY, dt20.getMillis()));
        assertEquals(1, fld.getValue(1L * 365L * MILLIS_PER_DAY + 1L, dt20.getMillis()));
        assertEquals(1, fld.getValue(2L * 365L * MILLIS_PER_DAY - 1L, dt20.getMillis()));
        assertEquals(2, fld.getValue(2L * 365L * MILLIS_PER_DAY, dt20.getMillis()));
        assertEquals(2, fld.getValue(2L * 365L * MILLIS_PER_DAY + 1L, dt20.getMillis()));
        assertEquals(2, fld.getValue(3L * 365L * MILLIS_PER_DAY - 1L, dt20.getMillis()));
        assertEquals(3, fld.getValue(3L * 365L * MILLIS_PER_DAY, dt20.getMillis()));
        assertEquals(3, fld.getValue(3L * 365L * MILLIS_PER_DAY + 1L, dt20.getMillis()));
        assertEquals(3, fld.getValue((4L * 365L + 1L) * MILLIS_PER_DAY - 1L, dt20.getMillis()));
        assertEquals(4, fld.getValue((4L * 365L + 1L) * MILLIS_PER_DAY, dt20.getMillis()));
        assertEquals(4, fld.getValue((4L * 365L + 1L) * MILLIS_PER_DAY + 1L, dt20.getMillis()));
        
        assertEquals(dt21.getMillis(), fld.add(dt20.getMillis(), 1));
        assertEquals(dt22.getMillis(), fld.add(dt20.getMillis(), 2));
        assertEquals(dt23.getMillis(), fld.add(dt20.getMillis(), 3));
        assertEquals(dt24.getMillis(), fld.add(dt20.getMillis(), 4));
        
        assertEquals(dt21.getMillis(), fld.add(dt20.getMillis(), 1L));
        assertEquals(dt22.getMillis(), fld.add(dt20.getMillis(), 2L));
        assertEquals(dt23.getMillis(), fld.add(dt20.getMillis(), 3L));
        assertEquals(dt24.getMillis(), fld.add(dt20.getMillis(), 4L));
    }

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        DateTime dt11 = new DateTime(1723, 11, 2, 0, 0, 0, 0, COPTIC_UTC);
        DateTime dt12 = new DateTime(1723, 12, 2, 0, 0, 0, 0, COPTIC_UTC);
        DateTime dt13 = new DateTime(1723, 13, 2, 0, 0, 0, 0, COPTIC_UTC);
        DateTime dt01 = new DateTime(1724, 1, 2, 0, 0, 0, 0, COPTIC_UTC);
        
        DurationField fld = dt11.monthOfYear().getDurationField();
        assertEquals(COPTIC_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 long updateResult(long minuend, long subtrahend) {
            // Because time zone can be dynamically changed, field must be
            // dynamically acquired.


            DurationField field;
            switch (iFieldType) {
            case YEARS:
                field = iChronology.years();
                break;
            case MONTHS:
                field = iChronology.months();
                break;
            case DAYS:
                field = iChronology.days();
                break;
            case WEEKYEARS:
                field = iChronology.weekyears();
                break;
            case WEEKS:
                field = iChronology.weeks();
                break;
            case HOURS:
                field = iChronology.hours();
                break;
            case MINUTES:
                field = iChronology.minutes();
                break;
            case SECONDS: default:
                field = iChronology.seconds();
                break;
            }


            String textToSet = "";


            if (iCheckbox.isSelected()) {
                long difference = field.getDifferenceAsLong(minuend, subtrahend);
                textToSet = Long.toString(difference);
                subtrahend = field.add(subtrahend, difference);
            }


            if (!iResult.getText().equals(textToSet)) {
                iResult.setText(textToSet);
            }

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        DateTime dt21 = new DateTime(1721, 10, 2, 0, 0, 0, 0, COPTIC_UTC);
        DateTime dt22 = new DateTime(1722, 10, 2, 0, 0, 0, 0, COPTIC_UTC);
        DateTime dt23 = new DateTime(1723, 10, 2, 0, 0, 0, 0, COPTIC_UTC);
        DateTime dt24 = new DateTime(1724, 10, 2, 0, 0, 0, 0, COPTIC_UTC);
        
        DurationField fld = dt20.year().getDurationField();
        assertEquals(COPTIC_UTC.years(), fld);
        assertEquals(1L * 365L * MILLIS_PER_DAY, fld.getMillis(1, dt20.getMillis()));
        assertEquals(2L * 365L * MILLIS_PER_DAY, fld.getMillis(2, dt20.getMillis()));
        assertEquals(3L * 365L * MILLIS_PER_DAY, fld.getMillis(3, dt20.getMillis()));
        assertEquals((4L * 365L + 1L) * MILLIS_PER_DAY, fld.getMillis(4, dt20.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, dt20.getMillis()));
        assertEquals(2L * 365L * MILLIS_PER_DAY, fld.getMillis(2L, dt20.getMillis()));
        assertEquals(3L * 365L * MILLIS_PER_DAY, fld.getMillis(3L, dt20.getMillis()));
        assertEquals((4L * 365L + 1L) * MILLIS_PER_DAY, fld.getMillis(4L, dt20.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, dt20.getMillis()));
        assertEquals(1, fld.getValue(1L * 365L * MILLIS_PER_DAY, dt20.getMillis()));
        assertEquals(1, fld.getValue(1L * 365L * MILLIS_PER_DAY + 1L, dt20.getMillis()));
        assertEquals(1, fld.getValue(2L * 365L * MILLIS_PER_DAY - 1L, dt20.getMillis()));
        assertEquals(2, fld.getValue(2L * 365L * MILLIS_PER_DAY, dt20.getMillis()));
        assertEquals(2, fld.getValue(2L * 365L * MILLIS_PER_DAY + 1L, dt20.getMillis()));
        assertEquals(2, fld.getValue(3L * 365L * MILLIS_PER_DAY - 1L, dt20.getMillis()));
        assertEquals(3, fld.getValue(3L * 365L * MILLIS_PER_DAY, dt20.getMillis()));
        assertEquals(3, fld.getValue(3L * 365L * MILLIS_PER_DAY + 1L, dt20.getMillis()));
        assertEquals(3, fld.getValue((4L * 365L + 1L) * MILLIS_PER_DAY - 1L, dt20.getMillis()));
        assertEquals(4, fld.getValue((4L * 365L + 1L) * MILLIS_PER_DAY, dt20.getMillis()));
        assertEquals(4, fld.getValue((4L * 365L + 1L) * MILLIS_PER_DAY + 1L, dt20.getMillis()));
        
        assertEquals(dt21.getMillis(), fld.add(dt20.getMillis(), 1));
        assertEquals(dt22.getMillis(), fld.add(dt20.getMillis(), 2));
        assertEquals(dt23.getMillis(), fld.add(dt20.getMillis(), 3));
        assertEquals(dt24.getMillis(), fld.add(dt20.getMillis(), 4));
        
        assertEquals(dt21.getMillis(), fld.add(dt20.getMillis(), 1L));
        assertEquals(dt22.getMillis(), fld.add(dt20.getMillis(), 2L));
        assertEquals(dt23.getMillis(), fld.add(dt20.getMillis(), 3L));
        assertEquals(dt24.getMillis(), fld.add(dt20.getMillis(), 4L));
    }

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        DateTime dt11 = new DateTime(1723, 11, 2, 0, 0, 0, 0, COPTIC_UTC);
        DateTime dt12 = new DateTime(1723, 12, 2, 0, 0, 0, 0, COPTIC_UTC);
        DateTime dt13 = new DateTime(1723, 13, 2, 0, 0, 0, 0, COPTIC_UTC);
        DateTime dt01 = new DateTime(1724, 1, 2, 0, 0, 0, 0, COPTIC_UTC);
        
        DurationField fld = dt11.monthOfYear().getDurationField();
        assertEquals(COPTIC_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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