001/* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors.
006 *
007 * Project Info:  http://www.jfree.org/jfreechart/index.html
008 *
009 * This library is free software; you can redistribute it and/or modify it 
010 * under the terms of the GNU Lesser General Public License as published by 
011 * the Free Software Foundation; either version 2.1 of the License, or 
012 * (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but 
015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
017 * License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this library; if not, write to the Free Software
021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
022 * USA.  
023 *
024 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
025 * in the United States and other countries.]
026 *
027 * -------------------------
028 * CategoryURLGenerator.java
029 * -------------------------
030 * (C) Copyright 2002-2007, by Richard Atkinson and Contributors.
031 *
032 * Original Author:  Richard Atkinson;
033 * Contributors:     David Gilbert (for Object Refinery Limited);
034 *
035 * Changes:
036 * --------
037 * 05-Aug-2002 : Version 1, contributed by Richard Atkinson;
038 * 09-Oct-2002 : Fixed errors reported by Checkstyle (DG);
039 * 10-Apr-2003 : Replaced reference to CategoryDataset with 
040 *               KeyedValues2DDataset (DG);
041 * 23-Apr-2003 : Switched around CategoryDataset and KeyedValues2DDataset 
042 *               (again) (DG);
043 * 13-Aug-2003 : Added clone() method (DG);
044 * 14-Jun-2004 : Removed clone() method - classes that implement the interface 
045 *               should implement the PublicCloneable interface instead, 
046 *               wherever possible (DG);
047 * ------------- JFREECHART 1.0.x ---------------------------------------------
048 * 02-Feb-2007 : Removed author tags from all over JFreeChart sources (DG);
049 *
050 */
051
052package org.jfree.chart.urls;
053
054import org.jfree.data.category.CategoryDataset;
055
056/**
057 * A URL generator for items in a {@link CategoryDataset}.
058 */
059public interface CategoryURLGenerator {
060
061    /**
062     * Returns a URL for one item in a dataset. As a guideline, the URL 
063     * should be valid within the context of an XHTML 1.0 document.
064     *
065     * @param data  the dataset.
066     * @param series  the series (zero-based index).
067     * @param category  the category.
068     *
069     * @return A string containing the URL.
070     */
071    public String generateURL(CategoryDataset data, int series, int category);
072
073}