    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     * PieSectionEntity.java
    029     * ---------------------
    030     * (C) Copyright 2002-2007, by Object Refinery Limited.
    031     *
    032     * Original Author:  David Gilbert (for Object Refinery Limited);
    033     * Contributor(s):   Richard Atkinson;
    034     *                   Christian W. Zuckschwerdt;
    035     *
    036     * Changes:
    037     * --------
    038     * 23-May-2002 : Version 1 (DG);
    039     * 12-Jun-2002 : Added Javadoc comments (DG);
    040     * 26-Jun-2002 : Added method to generate AREA tag for image map
    041     *               generation (DG);
    042     * 05-Aug-2002 : Added new constructor to populate URLText
    043     *               Moved getImageMapAreaTag() to ChartEntity (superclass) (RA);
    044     * 03-Oct-2002 : Fixed errors reported by Checkstyle (DG);
    045     * 07-Mar-2003 : Added pie index attribute, since the PiePlot class can create
    046     *               multiple pie plots within one chart.  Also renamed 'category'
    047     *               --> 'sectionKey' and changed the class from Object -->
    048     *               Comparable (DG);
    049     * 30-Jul-2003 : Added PieDataset reference (CZ);
    050     * 11-Jan-2005 : Removed deprecated code in preparation for 1.0.0 release (DG);
    051     * 13-Nov-2007 : Implemented equals() and hashCode() (DG);
    052     *
    053     */
    054
    055    package org.jfree.chart.entity;
    056
    057    import java.awt.Shape;
    058    import java.io.Serializable;
    059
    060    import org.jfree.chart.HashUtilities;
    061    import org.jfree.data.general.PieDataset;
    062    import org.jfree.util.ObjectUtilities;
    063
    064    /**
    065     * A chart entity that represents one section within a pie plot.
    066     */
    067    public class PieSectionEntity extends ChartEntity
    068                                  implements Serializable {
    069
    070        /** For serialization. */
    071        private static final long serialVersionUID = 9199892576531984162L;
    072
    073        /** The dataset. */
    074        private PieDataset dataset;
    075
    076        /** The pie index. */
    077        private int pieIndex;
    078
    079        /** The section index. */
    080        private int sectionIndex;
    081
    082        /** The section key. */
    083        private Comparable sectionKey;
    084
    085        /**
    086         * Creates a new pie section entity.
    087         *
    088         * @param area  the area.
    089         * @param dataset  the pie dataset.
    090         * @param pieIndex  the pie index (zero-based).
    091         * @param sectionIndex  the section index (zero-based).
    092         * @param sectionKey  the section key.
    093         * @param toolTipText  the tool tip text.
    094         * @param urlText  the URL text for HTML image maps.
    095         */
    096        public PieSectionEntity(Shape area,
    097                                PieDataset dataset,
    098                                int pieIndex, int sectionIndex,
    099                                Comparable sectionKey,
    100                                String toolTipText, String urlText) {
    101
    102            super(area, toolTipText, urlText);
    103            this.dataset = dataset;
    104            this.pieIndex = pieIndex;
    105            this.sectionIndex = sectionIndex;
    106            this.sectionKey = sectionKey;
    107
    108        }
    109
    110        /**
    111         * Returns the dataset this entity refers to.
    112         *
    113         * @return The dataset.
    114         *
    115         * @see #setDataset(PieDataset)
    116         */
    117        public PieDataset getDataset() {
    118            return this.dataset;
    119        }
    120
    121        /**
    122         * Sets the dataset this entity refers to.
    123         *
    124         * @param dataset  the dataset.
    125         *
    126         * @see #getDataset()
    127         */
    128        public void setDataset(PieDataset dataset) {
    129            this.dataset = dataset;
    130        }
    131
    132        /**
    133         * Returns the pie index.  For a regular pie chart, the section index is 0.
    134         * For a pie chart containing multiple pie plots, the pie index is the row
    135         * or column index from which the pie data is extracted.
    136         *
    137         * @return The pie index.
    138         *
    139         * @see #setPieIndex(int)
    140         */
    141        public int getPieIndex() {
    142            return this.pieIndex;
    143        }
    144
    145        /**
    146         * Sets the pie index.
    147         *
    148         * @param index  the new index value.
    149         *
    150         * @see #getPieIndex()
    151         */
    152        public void setPieIndex(int index) {
    153            this.pieIndex = index;
    154        }
    155
    156        /**
    157         * Returns the section index.
    158         *
    159         * @return The section index.
    160         *
    161         * @see #setSectionIndex(int)
    162         */
    163        public int getSectionIndex() {
    164            return this.sectionIndex;
    165        }
    166
    167        /**
    168         * Sets the section index.
    169         *
    170         * @param index  the section index.
    171         *
    172         * @see #getSectionIndex()
    173         */
    174        public void setSectionIndex(int index) {
    175            this.sectionIndex = index;
    176        }
    177
    178        /**
    179         * Returns the section key.
    180         *
    181         * @return The section key.
    182         *
    183         * @see #setSectionKey(Comparable)
    184         */
    185        public Comparable getSectionKey() {
    186            return this.sectionKey;
    187        }
    188
    189        /**
    190         * Sets the section key.
    191         *
    192         * @param key  the section key.
    193         *
    194         * @see #getSectionKey()
    195         */
    196        public void setSectionKey(Comparable key) {
    197            this.sectionKey = key;
    198        }
    199
    200        /**
    201         * Tests this entity for equality with an arbitrary object.
    202         *
    203         * @param obj  the object (<code>null</code> permitted).
    204         *
    205         * @return A boolean.
    206         */
    207        public boolean equals(Object obj) {
    208            if (obj == this) {
    209                return true;
    210            }
    211            if (!(obj instanceof PieSectionEntity)) {
    212                return false;
    213            }
    214            PieSectionEntity that = (PieSectionEntity) obj;
    215            if (!ObjectUtilities.equal(this.dataset, that.dataset)) {
    216                return false;
    217            }
    218            if (this.pieIndex != that.pieIndex) {
    219                return false;
    220            }
    221            if (this.sectionIndex != that.sectionIndex) {
    222                return false;
    223            }
    224            if (!ObjectUtilities.equal(this.sectionKey, that.sectionKey)) {
    225                return false;
    226            }
    227            return super.equals(obj);
    228        }
    229
    230        /**
    231         * Returns a hash code for this instance.
    232         *
    233         * @return A hash code.
    234         */
    235        public int hashCode() {
    236            int result = super.hashCode();
    237            result = HashUtilities.hashCode(result, this.pieIndex);
    238            result = HashUtilities.hashCode(result, this.sectionIndex);
    239            return result;
    240        }
    241
    242        /**
    243         * Returns a string representing the entity.
    244         *
    245         * @return A string representing the entity.
    246         */
    247        public String toString() {
    248            return "PieSection: " + this.pieIndex + ", " + this.sectionIndex + "("
    249                                  + this.sectionKey.toString() + ")";
    250        }
    251
    252    }