/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2006, 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.]
 *
 * ---------------------------
 * XYSeriesLabelGenerator.java
 * ---------------------------
 * (C) Copyright 2004, 2006, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: XYSeriesLabelGenerator.java,v 1.2.2.2 2006/11/24 16:23:10 mungady Exp $
 *
 * Changes
 * -------
 * 16-Nov-2004 : Version 1 (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 24-Nov-2006 : Updated API docs (DG);
 *
 */

package org.jfree.chart.labels;

import org.jfree.data.xy.XYDataset;

/**
 * A generator that creates labels for the series in an {@link XYDataset}.
 * <P>
 * Classes that implement this interface should be either (a) immutable, or
 * (b) cloneable via the <code>PublicCloneable</code> interface (defined in 
 * the JCommon class library).  This provides a mechanism for the referring
 * renderer to clone the generator if necessary.
 */
public interface XYSeriesLabelGenerator {

    /**
     * Generates a label for the specified series.  This label will be
     * used for the chart legend.
     * 
     * @param dataset  the dataset (<code>null</code> not permitted).
     * @param series  the series.
     * 
     * @return A series label.
     */
    public String generateLabel(XYDataset dataset, int series);

}
