jfreechart example source code file (LegendItemEntity.java)

This example jfreechart source code file (LegendItemEntity.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

awt, chartentity, cloneable, clonenotsupportedexception, clonenotsupportedexception, comparable, comparable, dataset, dataset, io, legenditementity, legenditementity, object, serializable, string

The jfreechart LegendItemEntity.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.]
 *
 * ---------------------
 * LegendItemEntity.java
 * ---------------------
 * (C) Copyright 2003-2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes:
 * --------
 * 05-Jun-2003 : Version 1 (DG);
 * 20-May-2004 : Added equals() method and implemented Cloneable and
 *               Serializable (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 18-May-2007 : Added dataset and seriesKey fields (DG);
 *
 */

package org.jfree.chart.entity;

import java.awt.Shape;
import java.io.Serializable;

import org.jfree.data.general.Dataset;
import org.jfree.util.ObjectUtilities;

/**
 * An entity that represents an item within a legend.
 */
public class LegendItemEntity extends ChartEntity
                              implements Cloneable, Serializable {

    /** For serialization. */
    private static final long serialVersionUID = -7435683933545666702L;

    /**
     * The dataset.
     *
     * @since 1.0.6
     */
    private Dataset dataset;

    /**
     * The series key.
     *
     * @since 1.0.6
     */
    private Comparable seriesKey;

    /** The series index. */
    private int seriesIndex;

    /**
     * Creates a legend item entity.
     *
     * @param area  the area.
     */
    public LegendItemEntity(Shape area) {
        super(area);
    }

    /**
     * Returns a reference to the dataset that this legend item is derived
     * from.
     *
     * @return The dataset.
     *
     * @since 1.0.6
     *
     * @see #setDataset(Dataset)
     */
    public Dataset getDataset() {
        return this.dataset;
    }

    /**
     * Sets a reference to the dataset that this legend item is derived from.
     *
     * @param dataset  the dataset.
     *
     * @since 1.0.6
     */
    public void setDataset(Dataset dataset) {
        this.dataset = dataset;
    }

    /**
     * Returns the series key that identifies the legend item.
     *
     * @return The series key.
     *
     * @since 1.0.6
     *
     * @see #setSeriesKey(Comparable)
     */
    public Comparable getSeriesKey() {
        return this.seriesKey;
    }

    /**
     * Sets the key for the series.
     *
     * @param key  the key.
     *
     * @since 1.0.6
     *
     * @see #getSeriesKey()
     */
    public void setSeriesKey(Comparable key) {
        this.seriesKey = key;
    }

    /**
     * Returns the series index.
     *
     * @return The series index.
     *
     * @see #setSeriesIndex(int)
     *
     * @deprecated As of 1.0.6, use the {@link #getSeriesKey()} method.
     */
    public int getSeriesIndex() {
        return this.seriesIndex;
    }

    /**
     * Sets the series index.
     *
     * @param index  the series index.
     *
     * @see #getSeriesIndex()
     *
     * @deprecated As of 1.0.6, use the {@link #setSeriesKey(Comparable)}
     *         method.
     */
    public void setSeriesIndex(int index) {
        this.seriesIndex = index;
    }

    /**
     * Tests this object 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 LegendItemEntity)) {
            return false;
        }
        LegendItemEntity that = (LegendItemEntity) obj;
        if (!ObjectUtilities.equal(this.seriesKey, that.seriesKey)) {
            return false;
        }
        if (this.seriesIndex != that.seriesIndex) {
            return false;
        }
        if (!ObjectUtilities.equal(this.dataset, that.dataset)) {
            return false;
        }
        return super.equals(obj);
    }

    /**
     * Returns a clone of the entity.
     *
     * @return A clone.
     *
     * @throws CloneNotSupportedException if there is a problem cloning the
     *         object.
     */
    public Object clone() throws CloneNotSupportedException {
        return super.clone();
    }

    /**
     * Returns a string representing this object (useful for debugging
     * purposes).
     *
     * @return A string (never <code>null).
     */
    public String toString() {
        return "LegendItemEntity: seriesKey=" + this.seriesKey
                + ", dataset=" + this.dataset;
    }

}