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/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2020, 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.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* -------------------------------
* CategoryItemLabelGenerator.java
* -------------------------------
* (C) Copyright 2001-2020, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
*/
package org.jfree.chart.labels;
import org.jfree.data.category.CategoryDataset;
/**
* A category item label generator is an object that can be assigned to a
* {@link org.jfree.chart.renderer.category.CategoryItemRenderer} and that
* assumes responsibility for creating text items to be used as labels for the
* items in a {@link org.jfree.chart.plot.CategoryPlot}.
*
* To assist with cloning charts, classes that implement this interface should
* also implement the {@link org.jfree.chart.util.PublicCloneable} interface.
*/
public interface CategoryItemLabelGenerator {
/**
* Generates a label for the specified row.
*
* @param dataset the dataset ({@code null} not permitted).
* @param row the row index (zero-based).
*
* @return The label.
*/
public String generateRowLabel(CategoryDataset dataset, int row);
/**
* Generates a label for the specified row.
*
* @param dataset the dataset ({@code null} not permitted).
* @param column the column index (zero-based).
*
* @return The label.
*/
public String generateColumnLabel(CategoryDataset dataset, int column);
/**
* Generates a label for the specified item. The label is typically a
* formatted version of the data value, but any text can be used.
*
* @param dataset the dataset ({@code null} not permitted).
* @param row the row index (zero-based).
* @param column the column index (zero-based).
*
* @return The label (possibly {@code null}).
*/
public String generateLabel(CategoryDataset dataset, int row, int column);
}