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jfreechart example source code file (CustomXYURLGenerator.java)

This example jfreechart source code file (CustomXYURLGenerator.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

arraylist, arraylist, cloneable, clonenotsupportedexception, customxyurlgenerator, customxyurlgenerator, io, list, list, object, publiccloneable, serializable, string, string, util, xyurlgenerator

The jfreechart CustomXYURLGenerator.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.]
 *
 * -------------------------
 * CustomXYURLGenerator.java
 * -------------------------
 * (C) Copyright 2002-2008, by Richard Atkinson and Contributors.
 *
 * Original Author:  Richard Atkinson;
 * Contributors:     David Gilbert (for Object Refinery Limited);
 *
 * Changes:
 * --------
 * 05-Aug-2002 : Version 1, contributed by Richard Atkinson;
 * 09-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 23-Mar-2003 : Implemented Serializable (DG);
 * 20-Jan-2005 : Minor Javadoc update (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 02-Feb-2007 : Removed author tags from all over JFreeChart sources (DG);
 * 11-Apr-2008 : Implemented Cloneable, otherwise charts using this URL
 *               generator will fail to clone (DG);
 *
 */

package org.jfree.chart.urls;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

import org.jfree.data.xy.XYDataset;
import org.jfree.util.PublicCloneable;

/**
 * A custom URL generator.
 */
public class CustomXYURLGenerator implements XYURLGenerator, Cloneable,
        PublicCloneable, Serializable {

    /** For serialization. */
    private static final long serialVersionUID = -8565933356596551832L;

    /** Storage for the URLs. */
    private ArrayList urlSeries = new ArrayList();

    /**
     * Default constructor.
     */
    public CustomXYURLGenerator() {
        super();
    }

    /**
     * Returns the number of URL lists stored by the renderer.
     *
     * @return The list count.
     */
    public int getListCount() {
        return this.urlSeries.size();
    }

    /**
     * Returns the number of URLs in a given list.
     *
     * @param list  the list index (zero based).
     *
     * @return The URL count.
     */
    public int getURLCount(int list) {
        int result = 0;
        List urls = (List) this.urlSeries.get(list);
        if (urls != null) {
            result = urls.size();
        }
        return result;
    }

    /**
     * Returns the URL for an item.
     *
     * @param series  the series index.
     * @param item  the item index.
     *
     * @return The URL (possibly <code>null).
     */
    public String getURL(int series, int item) {
        String result = null;
        if (series < getListCount()) {
            List urls = (List) this.urlSeries.get(series);
            if (urls != null) {
                if (item < urls.size()) {
                    result = (String) urls.get(item);
                }
            }
        }
        return result;
    }

    /**
     * Generates a URL.
     *
     * @param dataset  the dataset.
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return A string containing the URL (possibly <code>null).
     */
    public String generateURL(XYDataset dataset, int series, int item) {
        return getURL(series, item);
    }

    /**
     * Adds a list of URLs.
     *
     * @param urls  the list of URLs (<code>null permitted, the list
     *     is copied).
     */
    public void addURLSeries(List urls) {
        List listToAdd = null;
        if (urls != null) {
            listToAdd = new java.util.ArrayList(urls);
        }
        this.urlSeries.add(listToAdd);
    }

    /**
     * Tests this generator for equality with an arbitrary object.
     *
     * @param obj  the object (<code>null permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof CustomXYURLGenerator)) {
            return false;
        }
        CustomXYURLGenerator that = (CustomXYURLGenerator) obj;
        int listCount = getListCount();
        if (listCount != that.getListCount()) {
            return false;
        }

        for (int series = 0; series < listCount; series++) {
            int urlCount = getURLCount(series);
            if (urlCount != that.getURLCount(series)) {
                return false;
            }

            for (int item = 0; item < urlCount; item++) {
                String u1 = getURL(series, item);
                String u2 = that.getURL(series, item);
                if (u1 != null) {
                    if (!u1.equals(u2)) {
                        return false;
                    }
                }
                else {
                    if (u2 != null) {
                        return false;
                    }
                }
            }
        }
        return true;

    }

    /**
     * Returns a new generator that is a copy of, and independent from, this
     * generator.
     *
     * @return A clone.
     *
     * @throws CloneNotSupportedException if there is a problem with cloning.
     */
    public Object clone() throws CloneNotSupportedException {
        CustomXYURLGenerator clone = (CustomXYURLGenerator) super.clone();
        clone.urlSeries = new java.util.ArrayList(this.urlSeries);
        return clone;
    }

}

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