Examples of org.jfree.data.time.TimeSeriesDataItem

org.jfree.data.time.TimeSeriesDataItem
Represents one data item in a time series.
The time period can be any of the following:
- {@link Year}
- {@link Quarter}
- {@link Month}
- {@link Week}
- {@link Day}
- {@link Hour}
- {@link Minute}
- {@link Second}
- {@link Millisecond}
- {@link FixedMillisecond}
The time period is an immutable property of the data item. Data items will often be sorted within a list, and allowing the time period to be changed could destroy the sort order.
Implements the Comparable interface so that standard Java sorting can be used to keep the data items in order.

    /**
     * Create a TimeSeriesDataItem, add it to a TimeSeries.  Now, modifying
     * the original TimeSeriesDataItem should NOT affect the TimeSeries.
     */
    public void testAdd_TimeSeriesDataItem() {
        TimeSeriesDataItem item = new TimeSeriesDataItem(new Year(2009), 1.0);
        TimeSeries series = new TimeSeries("S1");
        series.add(item);
        assertTrue(item.equals(series.getDataItem(0)));
        item.setValue(new Double(99.9));
        assertFalse(item.equals(series.getDataItem(0)));
    }

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     * Test that an instance is equal to itself.
     *
     * SourceForge Bug ID: 558850.
     */
    public void testEqualsSelf() {
        TimeSeriesDataItem item = new TimeSeriesDataItem(
            new Day(23, 9, 2001), 99.7
        );
        assertTrue(item.equals(item));
    }

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    /**
     * Test the equals() method.
     */
    public void testEquals() {
        TimeSeriesDataItem item1 = new TimeSeriesDataItem(
            new Day(23, 9, 2001), 99.7
        );
        TimeSeriesDataItem item2 = new TimeSeriesDataItem(
            new Day(23, 9, 2001), 99.7
        );
        assertTrue(item1.equals(item2));
        assertTrue(item2.equals(item1));


        item1.setValue(new Integer(5));
        assertFalse(item1.equals(item2));
        item2.setValue(new Integer(5));
        assertTrue(item1.equals(item2));
    }

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    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {


        TimeSeriesDataItem item1 = new TimeSeriesDataItem(
            new Day(23, 9, 2001), 99.7
        );
        TimeSeriesDataItem item2 = null;


        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(item1);

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        s1.add(new Year(2007), 16.89);
        assertTrue(s1.getItemCount() == 5);


        s1.setMaximumItemCount(3);
        assertTrue(s1.getItemCount() == 3);
        TimeSeriesDataItem item = s1.getDataItem(0);
        assertTrue(item.getPeriod().equals(new Year(2002)));
        assertEquals(16.89, s1.getMinY(), EPSILON);
        assertEquals(19.32, s1.getMaxY(), EPSILON);
    }

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    /**
     * Some more checks for the addOrUpdate() method.
     */
    public void testAddOrUpdate4() {
        TimeSeries ts = new TimeSeries("S");
        TimeSeriesDataItem overwritten = ts.addOrUpdate(new Year(2009), 20.09);
        assertNull(overwritten);
        overwritten = ts.addOrUpdate(new Year(2009), 1.0);
        assertEquals(new Double(20.09), overwritten.getValue());
        assertEquals(new Double(1.0), ts.getValue(new Year(2009)));


        // changing the overwritten record shouldn't affect the series
        overwritten.setValue(null);
        assertEquals(new Double(1.0), ts.getValue(new Year(2009)));


        TimeSeriesDataItem item = new TimeSeriesDataItem(new Year(2010), 20.10);
        overwritten = ts.addOrUpdate(item);
        assertNull(overwritten);
        assertEquals(new Double(20.10), ts.getValue(new Year(2010)));
        // changing the item that was added should not change the series
        item.setValue(null);
        assertEquals(new Double(20.10), ts.getValue(new Year(2010)));
    }

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            pass = true;
        }
        assertTrue(pass);


        series.add(new Year(2006), 100.0);
        TimeSeriesDataItem item = series.getDataItem(0);
        assertEquals(new Year(2006), item.getPeriod());
        pass = false;
        try {
            /*item = */series.getDataItem(-1);
        }
        catch (IndexOutOfBoundsException e) {

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    /**
     * Create a TimeSeriesDataItem, add it to a TimeSeries.  Now, modifying
     * the original TimeSeriesDataItem should NOT affect the TimeSeries.
     */
    public void testAdd_TimeSeriesDataItem() {
        TimeSeriesDataItem item = new TimeSeriesDataItem(new Year(2009), 1.0);
        TimeSeries series = new TimeSeries("S1");
        series.add(item);
        assertTrue(item.equals(series.getDataItem(0)));
        item.setValue(new Double(99.9));
        assertFalse(item.equals(series.getDataItem(0)));
    }

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     * Test that an instance is equal to itself.
     *
     * SourceForge Bug ID: 558850.
     */
    public void testEqualsSelf() {
        TimeSeriesDataItem item = new TimeSeriesDataItem(
            new Day(23, 9, 2001), 99.7
        );
        assertTrue(item.equals(item));
    }

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    /**
     * Test the equals() method.
     */
    public void testEquals() {
        TimeSeriesDataItem item1 = new TimeSeriesDataItem(
            new Day(23, 9, 2001), 99.7
        );
        TimeSeriesDataItem item2 = new TimeSeriesDataItem(
            new Day(23, 9, 2001), 99.7
        );
        assertTrue(item1.equals(item2));
        assertTrue(item2.equals(item1));


        item1.setValue(new Integer(5));
        assertFalse(item1.equals(item2));
        item2.setValue(new Integer(5));
        assertTrue(item1.equals(item2));
    }

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