Examples of org.jfree.data.category.SlidingCategoryDataset

org.jfree.data.category.SlidingCategoryDataset
A {@link CategoryDataset} implementation that presents a subset of thecategories in an underlying dataset. The index of the first "visible" category can be modified, which provides a means of "sliding" through the categories in the underlying dataset. @since 1.0.10

     */
    public void testSerialization() {
        DefaultCategoryDataset u1 = new DefaultCategoryDataset();
        u1.addValue(1.0, "R1", "C1");
        u1.addValue(2.0, "R1", "C2");
        SlidingCategoryDataset d1 = new SlidingCategoryDataset(u1, 0, 5);
        SlidingCategoryDataset d2 = null;
        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(d1);
            out.close();


            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            d2 = (SlidingCategoryDataset) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(d1, d2);


        // basic check for independence
        u1.addValue(3.0, "R1", "C3");
        assertFalse(d1.equals(d2));
        DefaultCategoryDataset u2
                = (DefaultCategoryDataset) d2.getUnderlyingDataset();
        u2.addValue(3.0, "R1", "C3");
        assertTrue(d1.equals(d2));
    }

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    /**
     * Some checks for the getColumnCount() method.
     */
    public void testGetColumnCount() {
        DefaultCategoryDataset underlying = new DefaultCategoryDataset();
        SlidingCategoryDataset dataset = new SlidingCategoryDataset(underlying,
                10, 2);
        assertEquals(0, dataset.getColumnCount());
        underlying.addValue(1.0, "R1", "C1");
        assertEquals(0, dataset.getColumnCount());
        underlying.addValue(1.0, "R1", "C2");
        assertEquals(0, dataset.getColumnCount());
        dataset.setFirstCategoryIndex(0);
        assertEquals(2, dataset.getColumnCount());
        underlying.addValue(1.0, "R1", "C3");
        assertEquals(2, dataset.getColumnCount());
        dataset.setFirstCategoryIndex(2);
        assertEquals(1, dataset.getColumnCount());
        underlying.clear();
        assertEquals(0, dataset.getColumnCount());
    }

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    /**
     * Some checks for the getRowCount() method.
     */
    public void testGetRowCount() {
        DefaultCategoryDataset underlying = new DefaultCategoryDataset();
        SlidingCategoryDataset dataset = new SlidingCategoryDataset(underlying,
                10, 5);
        assertEquals(0, dataset.getRowCount());
        underlying.addValue(1.0, "R1", "C1");
        assertEquals(1, dataset.getRowCount());


        underlying.clear();
        assertEquals(0, dataset.getRowCount());
    }

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        DefaultCategoryDataset underlying = new DefaultCategoryDataset();
        underlying.addValue(1.0, "R1", "C1");
        underlying.addValue(2.0, "R1", "C2");
        underlying.addValue(3.0, "R1", "C3");
        underlying.addValue(4.0, "R1", "C4");
        SlidingCategoryDataset dataset = new SlidingCategoryDataset(underlying,
                1, 2);
        assertEquals(-1, dataset.getColumnIndex("C1"));
        assertEquals(0, dataset.getColumnIndex("C2"));
        assertEquals(1, dataset.getColumnIndex("C3"));
        assertEquals(-1, dataset.getColumnIndex("C4"));
    }

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        DefaultCategoryDataset underlying = new DefaultCategoryDataset();
        underlying.addValue(1.0, "R1", "C1");
        underlying.addValue(2.0, "R2", "C1");
        underlying.addValue(3.0, "R3", "C1");
        underlying.addValue(4.0, "R4", "C1");
        SlidingCategoryDataset dataset = new SlidingCategoryDataset(underlying,
                1, 2);
        assertEquals(0, dataset.getRowIndex("R1"));
        assertEquals(1, dataset.getRowIndex("R2"));
        assertEquals(2, dataset.getRowIndex("R3"));
        assertEquals(3, dataset.getRowIndex("R4"));
    }

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        DefaultCategoryDataset underlying = new DefaultCategoryDataset();
        underlying.addValue(1.0, "R1", "C1");
        underlying.addValue(2.0, "R1", "C2");
        underlying.addValue(3.0, "R1", "C3");
        underlying.addValue(4.0, "R1", "C4");
        SlidingCategoryDataset dataset = new SlidingCategoryDataset(underlying,
                1, 2);
        assertEquals(new Double(2.0), dataset.getValue("R1", "C2"));
        assertEquals(new Double(3.0), dataset.getValue("R1", "C3"));
        boolean pass = false;
        try {
            dataset.getValue("R1", "C1");
        }
        catch (UnknownKeyException e) {
            pass = true;
        }
        assertTrue(pass);


        pass = false;
        try {
            dataset.getValue("R1", "C4");
        }
        catch (UnknownKeyException e) {
            pass = true;
        }
        assertTrue(pass);

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        DefaultCategoryDataset underlying = new DefaultCategoryDataset();
        underlying.addValue(1.0, "R1", "C1");
        underlying.addValue(2.0, "R1", "C2");
        underlying.addValue(3.0, "R1", "C3");
        underlying.addValue(4.0, "R1", "C4");
        SlidingCategoryDataset dataset = new SlidingCategoryDataset(underlying,
                1, 2);
        List keys = dataset.getColumnKeys();
        assertTrue(keys.contains("C2"));
        assertTrue(keys.contains("C3"));
        assertEquals(2, keys.size());


        dataset.setFirstCategoryIndex(3);
        keys = dataset.getColumnKeys();
        assertTrue(keys.contains("C4"));
        assertEquals(1, keys.size());
    }

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