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jfreechart example source code file (EntityCollection.java)

This example jfreechart source code file (EntityCollection.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

chartentity, chartentity, collection, collection, entitycollection, entitycollection, iterator, iterator, util

The jfreechart EntityCollection.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.]
 *
 * ---------------------
 * EntityCollection.java
 * ---------------------
 * (C) Copyright 2002-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 23-May-2002 : Version 1 (DG);
 * 25-Jun-2002 : Removed unnecessary import (DG);
 * 26-Jun-2002 : Added iterator() method (DG);
 * 03-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 30-Jan-2004 : Added a method to add a collection of entities.
 * 11-Jan-2005 : Removed deprecated code in preparation for the 1.0.0
 *               release (DG);
 * 18-Jan-2005 : Added getEntity() and getEntityCount() methods (DG);
 *
 */

package org.jfree.chart.entity;

import java.util.Collection;
import java.util.Iterator;

/**
 * This interface defines the methods used to access an ordered list of
 * {@link ChartEntity} objects.
 */
public interface EntityCollection {

    /**
     * Clears all entities.
     */
    public void clear();

    /**
     * Adds an entity to the collection.
     *
     * @param entity  the entity (<code>null not permitted).
     */
    public void add(ChartEntity entity);

    /**
     * Adds the entities from another collection to this collection.
     *
     * @param collection  the other collection.
     */
    public void addAll(EntityCollection collection);

    /**
     * Returns an entity whose area contains the specified point.
     *
     * @param x  the x coordinate.
     * @param y  the y coordinate.
     *
     * @return The entity.
     */
    public ChartEntity getEntity(double x, double y);

    /**
     * Returns an entity from the collection.
     *
     * @param index  the index (zero-based).
     *
     * @return An entity.
     */
    public ChartEntity getEntity(int index);

    /**
     * Returns the entity count.
     *
     * @return The entity count.
     */
    public int getEntityCount();

    /**
     * Returns the entities in an unmodifiable collection.
     *
     * @return The entities.
     */
    public Collection getEntities();

    /**
     * Returns an iterator for the entities in the collection.
     *
     * @return An iterator.
     */
    public Iterator iterator();

}

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