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jfreechart example source code file (TableXYDatasetTests.java)

This example jfreechart source code file (TableXYDatasetTests.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

a, bytearrayoutputstream, bytearrayoutputstream, clonenotsupportedexception, defaulttablexydataset, defaulttablexydataset, io, objectinput, series, tablexydatasettests, tablexydatasettests, test, testcase, xyseries, xyseries

The jfreechart TableXYDatasetTests.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * ------------------------
 * TableXYDatasetTests.java
 * ------------------------
 * (C) Copyright 2003-2008, by Richard Atkinson and Contributors.
 *
 * Original Author:  Richard Atkinson;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * Changes
 * -------
 * 11-Aug-2003 : Version 1 (RA);
 * 18-Aug-2003 : Added tests for event notification when removing and updating
 *               series (RA);
 * 22-Sep-2003 : Changed to recognise that empty values are now null rather
 *               than zero (RA);
 * 16-Feb-2004 : Added some additional tests (DG);
 * 15-Jul-2004 : Switched getX() with getXValue() and getY() with
 *               getYValue() (DG);
 * 02-Feb-2007 : Removed author tags all over JFreeChart sources (DG);
 * 22-Apr-2008 : Added testPublicCloneable (DG);
 *
 */

package org.jfree.data.xy.junit;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;

import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;

import org.jfree.data.xy.DefaultTableXYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.util.PublicCloneable;

/**
 * Tests for {@link DefaultTableXYDataset}.
 */
public class TableXYDatasetTests extends TestCase {

    /**
     * Returns the tests as a test suite.
     *
     * @return The test suite.
     */
    public static Test suite() {
        return new TestSuite(TableXYDatasetTests.class);
    }

    /**
     * Constructs a new set of tests.
     *
     * @param name  the name of the tests.
     */
    public TableXYDatasetTests(String name) {
        super(name);
    }

    /**
     * Confirm that the equals method can distinguish all the required fields.
     */
    public void testEquals() {

        DefaultTableXYDataset d1 = new DefaultTableXYDataset();
        DefaultTableXYDataset d2 = new DefaultTableXYDataset();
        assertTrue(d1.equals(d2));
        assertTrue(d2.equals(d1));

        d1.addSeries(createSeries1());
        assertFalse(d1.equals(d2));

        d2.addSeries(createSeries1());
        assertTrue(d1.equals(d2));

    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        DefaultTableXYDataset d1 = new DefaultTableXYDataset();
        d1.addSeries(createSeries1());
        DefaultTableXYDataset d2 = null;
        try {
            d2 = (DefaultTableXYDataset) d1.clone();
        }
        catch (CloneNotSupportedException e) {
            System.err.println("Failed to clone.");
        }
        assertTrue(d1 != d2);
        assertTrue(d1.getClass() == d2.getClass());
        assertTrue(d1.equals(d2));
    }

    /**
     * Verify that this class implements {@link PublicCloneable}.
     */
    public void testPublicCloneable() {
        DefaultTableXYDataset d1 = new DefaultTableXYDataset();
        assertTrue(d1 instanceof PublicCloneable);
    }

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

        DefaultTableXYDataset d1 = new DefaultTableXYDataset();
        d1.addSeries(createSeries2());
        DefaultTableXYDataset 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 = (DefaultTableXYDataset) in.readObject();
            in.close();
        }
        catch (Exception e) {
            System.out.println(e.toString());
        }
        assertEquals(d1, d2);

    }

    /**
     * Assorted tests.
     */
    public void testTableXYDataset() {

        XYSeries series1 = createSeries1();
        XYSeries series2 = createSeries2();

        DefaultTableXYDataset dataset = new DefaultTableXYDataset();
        dataset.addSeries(series1);
        dataset.addSeries(series2);

        //  Test that there are 6 X points and some specific values
        assertEquals(6, dataset.getItemCount());
        assertEquals(6, dataset.getX(0, 5).intValue());
        assertEquals(null, dataset.getY(0, 5));
        assertEquals(6, dataset.getX(1, 5).intValue());
        assertEquals(2, dataset.getY(1, 5).intValue());

        // after adding a point to a series, check that there are now 7
        // items in each series
        series2.add(7, 2);
        assertEquals(7, dataset.getItemCount());
        assertEquals(null, dataset.getY(0, 6));
        assertEquals(2, dataset.getY(1, 6).intValue());

        //  Remove series 1
        dataset.removeSeries(series1);
        //  Test that there are still 7 X points
        assertEquals(7, dataset.getItemCount());

        //  Remove series 2 and add new series
        dataset.removeSeries(series2);
        series1 = createSeries1();
        dataset.addSeries(series1);

        //  Test that there are now 4 X points
        assertEquals(4, dataset.getItemCount());

    }

    /**
     * A test for bug report 788597.
     */
    public void test788597() {
        DefaultTableXYDataset dataset = new DefaultTableXYDataset();
        dataset.addSeries(createSeries1());
        assertEquals(4, dataset.getItemCount());
        dataset.removeAllSeries();
        assertEquals(0, dataset.getItemCount());
    }

    /**
     * Test that removing all values for a given x works.
     */
    public void testRemoveAllValuesForX() {
        DefaultTableXYDataset dataset = new DefaultTableXYDataset();
        dataset.addSeries(createSeries1());
        dataset.addSeries(createSeries2());
        dataset.removeAllValuesForX(new Double(2.0));
        assertEquals(5, dataset.getItemCount());
        assertEquals(new Double(1.0), dataset.getX(0, 0));
        assertEquals(new Double(3.0), dataset.getX(0, 1));
        assertEquals(new Double(4.0), dataset.getX(0, 2));
        assertEquals(new Double(5.0), dataset.getX(0, 3));
        assertEquals(new Double(6.0), dataset.getX(0, 4));
    }

    /**
     * Tests to see that pruning removes unwanted x values.
     */
    public void testPrune() {
        DefaultTableXYDataset dataset = new DefaultTableXYDataset();
        dataset.addSeries(createSeries1());
        dataset.addSeries(createSeries2());
        dataset.removeSeries(1);
        dataset.prune();
        assertEquals(4, dataset.getItemCount());
    }

    /**
     * Tests the auto-pruning feature.
     */
    public void testAutoPrune() {

        // WITH AUTOPRUNING
        DefaultTableXYDataset dataset = new DefaultTableXYDataset(true);
        dataset.addSeries(createSeriesA());
        assertEquals(2, dataset.getItemCount());  // should be 2 items
        dataset.addSeries(createSeriesB());
        assertEquals(2, dataset.getItemCount());  // still 2
        dataset.removeSeries(1);
        assertEquals(1, dataset.getItemCount());  // 1 value pruned.

        // WITHOUT AUTOPRUNING
        DefaultTableXYDataset dataset2 = new DefaultTableXYDataset(true);
        dataset2.addSeries(createSeriesA());
        assertEquals(2, dataset2.getItemCount());  // should be 2 items
        dataset2.addSeries(createSeriesB());
        assertEquals(2, dataset2.getItemCount());  // still 2
        dataset2.removeSeries(1);
        assertEquals(1, dataset2.getItemCount());  // still 2.

    }

    /**
     * Creates a series for testing.
     *
     * @return A series.
     */
    private XYSeries createSeriesA() {
        XYSeries s = new XYSeries("A", true, false);
        s.add(1.0, 1.1);
        s.add(2.0, null);
        return s;
    }

    /**
     * Creates a series for testing.
     *
     * @return A series.
     */
    private XYSeries createSeriesB() {
        XYSeries s = new XYSeries("B", true, false);
        s.add(1.0, null);
        s.add(2.0, 2.2);
        return s;
    }

    /**
     * Creates a series for testing.
     *
     * @return A series.
     */
    private XYSeries createSeries1() {
        XYSeries series1 = new XYSeries("Series 1", true, false);
        series1.add(1.0, 1.0);
        series1.add(2.0, 1.0);
        series1.add(4.0, 1.0);
        series1.add(5.0, 1.0);
        return series1;
    }

    /**
     * Creates a series for testing.
     *
     * @return A series.
     */
    private XYSeries createSeries2() {
        XYSeries series2 = new XYSeries("Series 2", true, false);
        series2.add(2.0, 2.0);
        series2.add(3.0, 2.0);
        series2.add(4.0, 2.0);
        series2.add(5.0, 2.0);
        series2.add(6.0, 2.0);
        return series2;
    }

}

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