CategoryItemEntity.java
/* ===========================================================
* 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.]
*
* -----------------------
* CategoryItemEntity.java
* -----------------------
* (C) Copyright 2002-2008, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): Richard Atkinson;
* Christian W. Zuckschwerdt;
*
* Changes:
* --------
* 23-May-2002 : Version 1 (DG);
* 12-Jun-2002 : Added Javadoc comments (DG);
* 26-Jun-2002 : Added getImageMapAreaTag() method (DG);
* 05-Aug-2002 : Added new constructor to populate URLText
* Moved getImageMapAreaTag() to ChartEntity (superclass) (RA);
* 03-Oct-2002 : Fixed errors reported by Checkstyle (DG);
* 30-Jul-2003 : Added CategoryDataset reference (CZ);
* 20-May-2004 : Added equals() and clone() methods, and implemented
* Serializable (DG);
* 11-Jan-2005 : Removed deprecated code in preparation for 1.0.0 release (DG);
* ------------- JFREECHART 1.0.x ---------------------------------------------
* 18-May-2007 : Updated to use row and column keys to identify item (DG);
* 19-Jun-2007 : Removed deprecated code and JCommon dependencies (DG);
*
*/
package org.jfree.chart.entity;
import java.awt.Shape;
import java.io.Serializable;
import org.jfree.chart.util.ObjectUtilities;
import org.jfree.data.category.CategoryDataset;
/**
* A chart entity that represents one item within a category plot.
*/
public class CategoryItemEntity extends ChartEntity
implements Cloneable, Serializable {
/** For serialization. */
private static final long serialVersionUID = -8657249457902337349L;
/** The dataset. */
private CategoryDataset dataset;
/**
* The row key.
*
* @since 1.0.6
*/
private Comparable rowKey;
/**
* The column key.
*
* @since 1.0.6
*/
private Comparable columnKey;
/**
* Creates a new entity instance for an item in the specified dataset.
*
* @param area the 'hotspot' area (<code>null</code> not permitted).
* @param toolTipText the tool tip text.
* @param urlText the URL text.
* @param dataset the dataset (<code>null</code> not permitted).
* @param rowKey the row key (<code>null</code> not permitted).
* @param columnKey the column key (<code>null</code> not permitted).
*
* @since 1.0.6
*/
public CategoryItemEntity(Shape area, String toolTipText, String urlText,
CategoryDataset dataset, Comparable rowKey, Comparable columnKey) {
super(area, toolTipText, urlText);
if (dataset == null) {
throw new IllegalArgumentException("Null 'dataset' argument.");
}
this.dataset = dataset;
this.rowKey = rowKey;
this.columnKey = columnKey;
}
/**
* Returns the dataset this entity refers to. This can be used to
* differentiate between items in a chart that displays more than one
* dataset.
*
* @return The dataset (never <code>null</code>).
*
* @see #setDataset(CategoryDataset)
*/
public CategoryDataset getDataset() {
return this.dataset;
}
/**
* Sets the dataset this entity refers to.
*
* @param dataset the dataset (<code>null</code> not permitted).
*
* @see #getDataset()
*/
public void setDataset(CategoryDataset dataset) {
if (dataset == null) {
throw new IllegalArgumentException("Null 'dataset' argument.");
}
this.dataset = dataset;
}
/**
* Returns the row key.
*
* @return The row key (never <code>null</code>).
*
* @since 1.0.6
*
* @see #setRowKey(Comparable)
*/
public Comparable getRowKey() {
return this.rowKey;
}
/**
* Sets the row key.
*
* @param rowKey the row key (<code>null</code> not permitted).
*
* @since 1.0.6
*
* @see #getRowKey()
*/
public void setRowKey(Comparable rowKey) {
this.rowKey = rowKey;
}
/**
* Returns the column key.
*
* @return The column key (never <code>null</code>).
*
* @since 1.0.6
*
* @see #setColumnKey(Comparable)
*/
public Comparable getColumnKey() {
return this.columnKey;
}
/**
* Sets the column key.
*
* @param columnKey the column key (<code>null</code> not permitted).
*
* @since 1.0.6
*
* @see #getColumnKey()
*/
public void setColumnKey(Comparable columnKey) {
this.columnKey = columnKey;
}
/**
* Returns a string representing this object (useful for debugging
* purposes).
*
* @return A string (never <code>null</code>).
*/
public String toString() {
return "CategoryItemEntity: rowKey=" + this.rowKey
+ ", columnKey=" + this.columnKey + ", dataset=" + this.dataset;
}
/**
* Tests the entity for equality with an arbitrary object.
*
* @param obj the object (<code>null</code> permitted).
*
* @return A boolean.
*/
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof CategoryItemEntity)) {
return false;
}
CategoryItemEntity that = (CategoryItemEntity) obj;
if (!this.rowKey.equals(that.rowKey)) {
return false;
}
if (!this.columnKey.equals(that.columnKey)) {
return false;
}
if (!ObjectUtilities.equal(this.dataset, that.dataset)) {
return false;
}
return super.equals(obj);
}
}