home | career | drupal | java | mac | mysql | perl | scala | uml | unix  

jfreechart example source code file (LogAxisTests.java)

This example jfreechart source code file (LogAxisTests.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

awt, categoryplot, column, defaultcategorydataset, epsilon, epsilon, geometry, io, log, logaxis, logaxis, row, row, test, test, xyplot, xyseriescollection

The jfreechart LogAxisTests.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.]
 *
 * -----------------
 * LogAxisTests.java
 * -----------------
 * (C) Copyright 2007, 2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 11-Jul-2007 : Version 1 (DG);
 * 08-Apr-2008 : Fixed incorrect testEquals() method (DG);
 *
 */

package org.jfree.chart.axis.junit;

import java.awt.geom.Rectangle2D;
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.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.LogAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.ui.RectangleEdge;

/**
 * Tests for the {@link LogAxis} class.
 */
public class LogAxisTests extends TestCase {

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

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

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        LogAxis a1 = new LogAxis("Test");
        LogAxis a2 = null;
        try {
            a2 = (LogAxis) a1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(a1 != a2);
        assertTrue(a1.getClass() == a2.getClass());
        assertTrue(a1.equals(a2));
    }

    /**
     * Confirm that the equals method can distinguish all the required fields.
     */
    public void testEquals() {
        LogAxis a1 = new LogAxis("Test");
        LogAxis a2 = new LogAxis("Test");
        assertTrue(a1.equals(a2));

        a1.setBase(2.0);
        assertFalse(a1.equals(a2));
        a2.setBase(2.0);
        assertTrue(a1.equals(a2));

        a1.setSmallestValue(0.1);
        assertFalse(a1.equals(a2));
        a2.setSmallestValue(0.1);
        assertTrue(a1.equals(a2));

        a1.setMinorTickCount(8);
        assertFalse(a1.equals(a2));
        a2.setMinorTickCount(8);
        assertTrue(a1.equals(a2));
    }

    /**
     * Two objects that are equal are required to return the same hashCode.
     */
    public void testHashCode() {
        LogAxis a1 = new LogAxis("Test");
        LogAxis a2 = new LogAxis("Test");
        assertTrue(a1.equals(a2));
        int h1 = a1.hashCode();
        int h2 = a2.hashCode();
        assertEquals(h1, h2);
    }

    private static final double EPSILON = 0.0000001;

    /**
     * Test the translation of Java2D values to data values.
     */
    public void testTranslateJava2DToValue() {
        LogAxis axis = new LogAxis();
        axis.setRange(50.0, 100.0);
        Rectangle2D dataArea = new Rectangle2D.Double(10.0, 50.0, 400.0, 300.0);
        double y1 = axis.java2DToValue(75.0, dataArea, RectangleEdge.LEFT);
        assertEquals(94.3874312681693, y1, EPSILON);
        double y2 = axis.java2DToValue(75.0, dataArea, RectangleEdge.RIGHT);
        assertEquals(94.3874312681693, y2, EPSILON);
        double x1 = axis.java2DToValue(75.0, dataArea, RectangleEdge.TOP);
        assertEquals(55.961246381405, x1, EPSILON);
        double x2 = axis.java2DToValue(75.0, dataArea, RectangleEdge.BOTTOM);
        assertEquals(55.961246381405, x2, EPSILON);
        axis.setInverted(true);
        double y3 = axis.java2DToValue(75.0, dataArea, RectangleEdge.LEFT);
        assertEquals(52.9731547179647, y3, EPSILON);
        double y4 = axis.java2DToValue(75.0, dataArea, RectangleEdge.RIGHT);
        assertEquals(52.9731547179647, y4, EPSILON);
        double x3 = axis.java2DToValue(75.0, dataArea, RectangleEdge.TOP);
        assertEquals(89.3475453695651, x3, EPSILON);
        double x4 = axis.java2DToValue(75.0, dataArea, RectangleEdge.BOTTOM);
        assertEquals(89.3475453695651, x4, EPSILON);
    }

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

        LogAxis a1 = new LogAxis("Test Axis");
        LogAxis a2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(a1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            a2 = (LogAxis) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(a1, a2);

    }

    /**
     * A simple test for the auto-range calculation looking at a
     * LogAxis used as the range axis for a CategoryPlot.
     */
    public void testAutoRange1() {
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        dataset.setValue(100.0, "Row 1", "Column 1");
        dataset.setValue(200.0, "Row 1", "Column 2");
        JFreeChart chart = ChartFactory.createBarChart(
            "Test",
            "Categories",
            "Value",
            dataset,
            PlotOrientation.VERTICAL,
            false,
            false,
            false
        );
        CategoryPlot plot = (CategoryPlot) chart.getPlot();
        LogAxis axis = new LogAxis("Log(Y)");
        plot.setRangeAxis(axis);
        assertEquals(0.0, axis.getLowerBound(), EPSILON);
        assertEquals(2.6066426411261268E7, axis.getUpperBound(), EPSILON);
    }

    /**
     * A simple test for the auto-range calculation looking at a
     * NumberAxis used as the range axis for a CategoryPlot.  In this
     * case, the original dataset is replaced with a new dataset.
     */
    public void testAutoRange3() {
        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        dataset.setValue(100.0, "Row 1", "Column 1");
        dataset.setValue(200.0, "Row 1", "Column 2");
        JFreeChart chart = ChartFactory.createLineChart("Test", "Categories",
                "Value", dataset, PlotOrientation.VERTICAL, false, false,
                false);
        CategoryPlot plot = (CategoryPlot) chart.getPlot();
        LogAxis axis = new LogAxis("Log(Y)");
        plot.setRangeAxis(axis);
        assertEquals(96.59363289248458, axis.getLowerBound(), EPSILON);
        assertEquals(207.0529847682752, axis.getUpperBound(), EPSILON);

        // now replacing the dataset should update the axis range...
        DefaultCategoryDataset dataset2 = new DefaultCategoryDataset();
        dataset2.setValue(900.0, "Row 1", "Column 1");
        dataset2.setValue(1000.0, "Row 1", "Column 2");
        plot.setDataset(dataset2);
        assertEquals(895.2712433374774, axis.getLowerBound(), EPSILON);
        assertEquals(1005.2819262292991, axis.getUpperBound(), EPSILON);
    }

    /**
     * Checks that the auto-range for the domain axis on an XYPlot is
     * working as expected.
     */
    public void testXYAutoRange1() {
        XYSeries series = new XYSeries("Series 1");
        series.add(1.0, 1.0);
        series.add(2.0, 2.0);
        series.add(3.0, 3.0);
        XYSeriesCollection dataset = new XYSeriesCollection();
        dataset.addSeries(series);
        JFreeChart chart = ChartFactory.createScatterPlot(
            "Test",
            "X",
            "Y",
            dataset,
            PlotOrientation.VERTICAL,
            false,
            false,
            false
        );
        XYPlot plot = (XYPlot) chart.getPlot();
        LogAxis axis = new LogAxis("Log(Y)");
        plot.setRangeAxis(axis);
        assertEquals(0.9465508226401592, axis.getLowerBound(), EPSILON);
        assertEquals(3.1694019256486126, axis.getUpperBound(), EPSILON);
    }

    /**
     * Checks that the auto-range for the range axis on an XYPlot is
     * working as expected.
     */
    public void testXYAutoRange2() {
        XYSeries series = new XYSeries("Series 1");
        series.add(1.0, 1.0);
        series.add(2.0, 2.0);
        series.add(3.0, 3.0);
        XYSeriesCollection dataset = new XYSeriesCollection();
        dataset.addSeries(series);
        JFreeChart chart = ChartFactory.createScatterPlot(
            "Test",
            "X",
            "Y",
            dataset,
            PlotOrientation.VERTICAL,
            false,
            false,
            false
        );
        XYPlot plot = (XYPlot) chart.getPlot();
        LogAxis axis = new LogAxis("Log(Y)");
        plot.setRangeAxis(axis);
        assertEquals(0.9465508226401592, axis.getLowerBound(), EPSILON);
        assertEquals(3.1694019256486126, axis.getUpperBound(), EPSILON);
    }

    /**
     * Some checks for the setLowerBound() method.
     */
    public void testSetLowerBound() {
        LogAxis axis = new LogAxis("X");
        axis.setRange(0.0, 10.0);
        axis.setLowerBound(5.0);
        assertEquals(5.0, axis.getLowerBound(), EPSILON);
        axis.setLowerBound(10.0);
        assertEquals(10.0, axis.getLowerBound(), EPSILON);
        assertEquals(11.0, axis.getUpperBound(), EPSILON);
    }

    /**
     * Checks the default value for the tickMarksVisible flag.
     */
    public void testTickMarksVisibleDefault() {
        LogAxis axis = new LogAxis("Log Axis");
        assertTrue(axis.isTickMarksVisible());
    }
}

Other jfreechart examples (source code examples)

Here is a short list of links related to this jfreechart LogAxisTests.java source code file:



my book on functional programming

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.