jfreechart example source code file (DefaultOHLCDatasetTests.java)

This example jfreechart source code file (DefaultOHLCDatasetTests.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

bytearrayoutputstream, clonenotsupportedexception, date, date, defaultohlcdataset, defaultohlcdataset, defaultohlcdatasettests, epsilon, io, objectinput, ohlcdataitem, ohlcdataitem, series, series, testcase, util

The jfreechart DefaultOHLCDatasetTests.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.]
 *
 * ----------------------------
 * DefaultOHLCDatasetTests.java
 * ----------------------------
 * (C) Copyright 2005-2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 29-Apr-2005 : Version 1 (DG);
 * 28-Nov-2006 : Extended equals() test (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 java.util.Date;

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

import org.jfree.data.Range;
import org.jfree.data.general.DatasetUtilities;
import org.jfree.data.xy.DefaultOHLCDataset;
import org.jfree.data.xy.OHLCDataItem;
import org.jfree.util.PublicCloneable;

/**
 * Tests for the {@link DefaultOHLCDataset} class.
 */
public class DefaultOHLCDatasetTests extends TestCase {

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

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

    private static final double EPSILON = 0.0000000001;

    /**
     * A small test for the data range calculated on this dataset.
     */
    public void testDataRange() {
        OHLCDataItem[] data = new OHLCDataItem[3];
        data[0] = new OHLCDataItem(new Date(11L), 2.0, 4.0, 1.0, 3.0, 100.0);
        data[1] = new OHLCDataItem(new Date(22L), 4.0, 9.0, 2.0, 5.0, 120.0);
        data[2] = new OHLCDataItem(new Date(33L), 3.0, 7.0, 3.0, 6.0, 140.0);
        DefaultOHLCDataset d = new DefaultOHLCDataset("S1", data);
        Range r = DatasetUtilities.findRangeBounds(d, true);
        assertEquals(1.0, r.getLowerBound(), EPSILON);
        assertEquals(9.0, r.getUpperBound(), EPSILON);
    }

    /**
     * Confirm that the equals method can distinguish all the required fields.
     */
    public void testEquals() {
        DefaultOHLCDataset d1 = new DefaultOHLCDataset("Series 1",
                new OHLCDataItem[0]);
        DefaultOHLCDataset d2 = new DefaultOHLCDataset("Series 1",
                new OHLCDataItem[0]);
        assertTrue(d1.equals(d2));
        assertTrue(d2.equals(d1));

        d1 = new DefaultOHLCDataset("Series 2", new OHLCDataItem[0]);
        assertFalse(d1.equals(d2));
        d2 = new DefaultOHLCDataset("Series 2", new OHLCDataItem[0]);
        assertTrue(d1.equals(d2));

        d1 = new DefaultOHLCDataset("Series 2", new OHLCDataItem[] {
                new OHLCDataItem(new Date(123L), 1.2, 3.4, 5.6, 7.8, 99.9)});
        assertFalse(d1.equals(d2));
        d2 = new DefaultOHLCDataset("Series 2", new OHLCDataItem[] {
                new OHLCDataItem(new Date(123L), 1.2, 3.4, 5.6, 7.8, 99.9)});
        assertTrue(d1.equals(d2));

    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        DefaultOHLCDataset d1 = new DefaultOHLCDataset("Series 1",
                new OHLCDataItem[0]);
        DefaultOHLCDataset d2 = null;
        try {
            d2 = (DefaultOHLCDataset) d1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(d1 != d2);
        assertTrue(d1.getClass() == d2.getClass());
        assertTrue(d1.equals(d2));
    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning2() {
        OHLCDataItem item1 = new OHLCDataItem(new Date(1L), 1.0, 2.0, 3.0, 4.0,
                5.0);
        OHLCDataItem item2 = new OHLCDataItem(new Date(2L), 6.0, 7.0, 8.0, 9.0,
                10.0);
        // create an array of items in reverse order
        OHLCDataItem[] items = new OHLCDataItem[] {item2, item1};
        DefaultOHLCDataset d1 = new DefaultOHLCDataset("Series 1", items);
        DefaultOHLCDataset d2 = null;
        try {
            d2 = (DefaultOHLCDataset) d1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(d1 != d2);
        assertTrue(d1.getClass() == d2.getClass());
        assertTrue(d1.equals(d2));

        d1.sortDataByDate();
        assertFalse(d1.equals(d2));
    }

    /**
     * Verify that this class implements {@link PublicCloneable}.
     */
    public void testPublicCloneable() {
        DefaultOHLCDataset d1 = new DefaultOHLCDataset("Series 1",
                new OHLCDataItem[0]);
        assertTrue(d1 instanceof PublicCloneable);
    }

    /**
     * Serialize an instance, restore it, and check for equality.
     */
    public void testSerialization() {
        DefaultOHLCDataset d1 = new DefaultOHLCDataset("Series 1",
                new OHLCDataItem[0]);
        DefaultOHLCDataset 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 = (DefaultOHLCDataset) in.readObject();
            in.close();
        }
        catch (Exception e) {
            System.out.println(e.toString());
        }
        assertEquals(d1, d2);
    }

}