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

jfreechart example source code file (KeyedObjectsTests.java)

This example jfreechart source code file (KeyedObjectsTests.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, b, c, clonenotsupportedexception, d, indexoutofboundsexception, indexoutofboundsexception, io, k1, key, key, keyedobjects, keyedobjects, object, object, util

The jfreechart KeyedObjectsTests.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.]
 *
 * ----------------------
 * KeyedObjectsTests.java
 * ----------------------
 * (C) Copyright 2004-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 27-Jan-2004 : Version 1 (DG);
 * 28-Sep-2007 : Added testCloning2() (DG);
 * 03-Oct-2007 : New tests (DG);
 *
 */

package org.jfree.data.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.ArrayList;

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

import org.jfree.data.KeyedObjects;
import org.jfree.data.UnknownKeyException;
import org.jfree.data.general.DefaultPieDataset;

/**
 * Tests for the {@link KeyedObjects} class.
 */
public class KeyedObjectsTests extends TestCase {

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

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

    /**
     * Common test setup.
     */
    protected void setUp() {
        // no setup required
    }

    /**
     * Confirm that cloning works.
     */
    public void testCloning() {
        KeyedObjects ko1 = new KeyedObjects();
        ko1.addObject("V1", new Integer(1));
        ko1.addObject("V2", null);
        ko1.addObject("V3", new Integer(3));
        KeyedObjects ko2 = null;
        try {
            ko2 = (KeyedObjects) ko1.clone();
        }
        catch (CloneNotSupportedException e) {
            System.err.println("Failed to clone.");
        }
        assertTrue(ko1 != ko2);
        assertTrue(ko1.getClass() == ko2.getClass());
        assertTrue(ko1.equals(ko2));
    }

    /**
     * Confirm special features of cloning.
     */
    public void testCloning2() {
        // case 1 - object is mutable but not PublicCloneable
        Object obj1 = new ArrayList();
        KeyedObjects ko1 = new KeyedObjects();
        ko1.addObject("K1", obj1);
        KeyedObjects ko2 = null;
        try {
            ko2 = (KeyedObjects) ko1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(ko1 != ko2);
        assertTrue(ko1.getClass() == ko2.getClass());
        assertTrue(ko1.equals(ko2));

        // the clone contains a reference to the original object
        assertTrue(ko2.getObject("K1") == obj1);

        // CASE 2 - object is mutable AND PublicCloneable
        obj1 = new DefaultPieDataset();
        ko1 = new KeyedObjects();
        ko1.addObject("K1", obj1);
        ko2 = null;
        try {
            ko2 = (KeyedObjects) ko1.clone();
        }
        catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        assertTrue(ko1 != ko2);
        assertTrue(ko1.getClass() == ko2.getClass());
        assertTrue(ko1.equals(ko2));

        // the clone contains a reference to a CLONE of the original object
        assertTrue(ko2.getObject("K1") != obj1);
    }

    /**
     * Check that inserting and retrieving values works as expected.
     */
    public void testInsertAndRetrieve() {

        KeyedObjects data = new KeyedObjects();
        data.addObject("A", new Double(1.0));
        data.addObject("B", new Double(2.0));
        data.addObject("C", new Double(3.0));
        data.addObject("D", null);

        // check key order
        assertEquals(data.getKey(0), "A");
        assertEquals(data.getKey(1), "B");
        assertEquals(data.getKey(2), "C");
        assertEquals(data.getKey(3), "D");

        // check retrieve value by key
        assertEquals(data.getObject("A"), new Double(1.0));
        assertEquals(data.getObject("B"), new Double(2.0));
        assertEquals(data.getObject("C"), new Double(3.0));
        assertEquals(data.getObject("D"), null);

        boolean pass = false;
        try {
            data.getObject("Not a key");
        }
        catch (UnknownKeyException e) {
            pass = true;
        }
        assertTrue(pass);

        // check retrieve value by index
        assertEquals(data.getObject(0), new Double(1.0));
        assertEquals(data.getObject(1), new Double(2.0));
        assertEquals(data.getObject(2), new Double(3.0));
        assertEquals(data.getObject(3), null);

    }

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

        KeyedObjects ko1 = new KeyedObjects();
        ko1.addObject("Key 1", "Object 1");
        ko1.addObject("Key 2", null);
        ko1.addObject("Key 3", "Object 2");

        KeyedObjects ko2 = null;

        try {
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ObjectOutput out = new ObjectOutputStream(buffer);
            out.writeObject(ko1);
            out.close();

            ObjectInput in = new ObjectInputStream(
                    new ByteArrayInputStream(buffer.toByteArray()));
            ko2 = (KeyedObjects) in.readObject();
            in.close();
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        assertEquals(ko1, ko2);

    }

    /**
     * Simple checks for the getObject(int) method.
     */
    public void testGetObject() {
        // retrieve an item
        KeyedObjects ko1 = new KeyedObjects();
        ko1.addObject("Key 1", "Object 1");
        ko1.addObject("Key 2", null);
        ko1.addObject("Key 3", "Object 2");
        assertEquals("Object 1", ko1.getObject(0));
        assertNull(ko1.getObject(1));
        assertEquals("Object 2", ko1.getObject(2));

        // request with a negative index
        boolean pass = false;
        try {
            ko1.getObject(-1);
        }
        catch (IndexOutOfBoundsException e) {
            pass = true;
        }
        assertTrue(pass);

        // request width index == itemCount
        pass = false;
        try {
            ko1.getObject(3);
        }
        catch (IndexOutOfBoundsException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Simple checks for the getKey(int) method.
     */
    public void testGetKey() {
        // retrieve an item
        KeyedObjects ko1 = new KeyedObjects();
        ko1.addObject("Key 1", "Object 1");
        ko1.addObject("Key 2", null);
        ko1.addObject("Key 3", "Object 2");
        assertEquals("Key 1", ko1.getKey(0));
        assertEquals("Key 2", ko1.getKey(1));
        assertEquals("Key 3", ko1.getKey(2));

        // request with a negative index
        boolean pass = false;
        try {
            ko1.getKey(-1);
        }
        catch (IndexOutOfBoundsException e) {
            pass = true;
        }
        assertTrue(pass);

        // request width index == itemCount
        pass = false;
        try {
            ko1.getKey(3);
        }
        catch (IndexOutOfBoundsException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Simple checks for the getIndex(Comparable) method.
     */
    public void testGetIndex() {
        KeyedObjects ko1 = new KeyedObjects();
        ko1.addObject("Key 1", "Object 1");
        ko1.addObject("Key 2", null);
        ko1.addObject("Key 3", "Object 2");
        assertEquals(0, ko1.getIndex("Key 1"));
        assertEquals(1, ko1.getIndex("Key 2"));
        assertEquals(2, ko1.getIndex("Key 3"));

        // check null argument
        boolean pass = false;
        try {
            ko1.getIndex(null);
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Some checks for the setObject(Comparable, Object) method.
     */
    public void testSetObject() {
        KeyedObjects ko1 = new KeyedObjects();
        ko1.setObject("Key 1", "Object 1");
        ko1.setObject("Key 2", null);
        ko1.setObject("Key 3", "Object 2");

        assertEquals("Object 1", ko1.getObject("Key 1"));
        assertEquals(null, ko1.getObject("Key 2"));
        assertEquals("Object 2", ko1.getObject("Key 3"));

        // replace an existing value
        ko1.setObject("Key 2", "AAA");
        ko1.setObject("Key 3", "BBB");
        assertEquals("AAA", ko1.getObject("Key 2"));
        assertEquals("BBB", ko1.getObject("Key 3"));

        // try a null key - should throw an exception
        boolean pass = false;
        try {
            ko1.setObject(null, "XX");
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Some checks for the removeValue() methods.
     */
    public void testRemoveValue() {
        KeyedObjects ko1 = new KeyedObjects();
        ko1.setObject("Key 1", "Object 1");
        ko1.setObject("Key 2", null);
        ko1.setObject("Key 3", "Object 2");

        ko1.removeValue(1);
        assertEquals(2, ko1.getItemCount());
        assertEquals(1, ko1.getIndex("Key 3"));

        ko1.removeValue("Key 1");
        assertEquals(1, ko1.getItemCount());
        assertEquals(0, ko1.getIndex("Key 3"));

        // try unknown key
        boolean pass = false;
        try {
            ko1.removeValue("UNKNOWN");
        }
        catch (UnknownKeyException e) {
            pass = true;
        }
        assertTrue(pass);

        // try null argument
        pass = false;
        try {
            ko1.removeValue(null);
        }
        catch (IllegalArgumentException e) {
            pass = true;
        }
        assertTrue(pass);
    }

    /**
     * Some checks for the removeValue(int) method.
     */
    public void testRemoveValueInt() {
        KeyedObjects ko1 = new KeyedObjects();
        ko1.setObject("Key 1", "Object 1");
        ko1.setObject("Key 2", null);
        ko1.setObject("Key 3", "Object 2");

        ko1.removeValue(1);
        assertEquals(2, ko1.getItemCount());
        assertEquals(1, ko1.getIndex("Key 3"));


        // try negative key index
        boolean pass = false;
        try {
            ko1.removeValue(-1);
        }
        catch (IndexOutOfBoundsException e) {
            pass = true;
        }
        assertTrue(pass);

        // try key index == itemCount
        pass = false;
        try {
            ko1.removeValue(2);
        }
        catch (IndexOutOfBoundsException e) {
            pass = true;
        }
        assertTrue(pass);
    }

}

Other jfreechart examples (source code examples)

Here is a short list of links related to this jfreechart KeyedObjectsTests.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.