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jfreechart example source code file (OutlierList.java)

This example jfreechart source code file (OutlierList.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

arraylist, arraylist, awt, geometry, iterator, iterator, list, outlier, outlier, outlierlist, outlierlist, util

The jfreechart OutlierList.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.]
 *
 * ----------------
 * OutlierList.java
 * ----------------
 * (C) Copyright 2003-2008, by David Browning and Contributors.
 *
 * Original Author:  David Browning (for Australian Institute of Marine
 *                   Science);
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * Changes
 * -------
 * 05-Aug-2003 : Version 1, contributed by David Browning (DG);
 * 28-Aug-2003 : Minor tidy-up including Javadocs (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 02-Feb-2007 : Removed author tags from all over JFreeChart sources (DG);
 *
 */

package org.jfree.chart.renderer;

import java.awt.geom.Point2D;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/**
 * A collection of outliers for a single entity in a box and whisker plot.
 *
 * Outliers are grouped in lists for each entity. Lists contain
 * one or more outliers, determined by whether overlaps have
 * occured. Overlapping outliers are grouped in the same list.
 *
 * Each list contains an averaged outlier, which is the same as a single
 * outlier if there is only one outlier in the list, but the average of
 * all the outliers in the list if there is more than one.
 *
 * NB This is simply my scheme for displaying outliers, and might not be
 * acceptable by the wider community.
 */
public class OutlierList {

    /** Storage for the outliers. */
    private List outliers;

    /** The averaged outlier. */
    private Outlier averagedOutlier;

    /**
     * A flag that indicates whether or not there are multiple outliers in the
     * list.
     */
    private boolean multiple = false;

    /**
     * Creates a new list containing a single outlier.
     *
     * @param outlier  the outlier.
     */
    public OutlierList(Outlier outlier) {
        this.outliers = new ArrayList();
        setAveragedOutlier(outlier);
    }

    /**
     * Adds an outlier to the list.
     *
     * @param outlier  the outlier.
     *
     * @return A boolean.
     */
    public boolean add(Outlier outlier) {
        return this.outliers.add(outlier);
    }

    /**
     * Returns the number of outliers in the list.
     *
     * @return The item count.
     */
    public int getItemCount() {
        return this.outliers.size();
    }

    /**
     * Returns the averaged outlier.
     *
     * @return The averaged outlier.
     */
    public Outlier getAveragedOutlier() {
        return this.averagedOutlier;
    }

    /**
     * Sets the averaged outlier.
     *
     * @param averagedOutlier  the averaged outlier.
     */
    public void setAveragedOutlier(Outlier averagedOutlier) {
        this.averagedOutlier = averagedOutlier;
    }

    /**
     * Returns <code>true if the list contains multiple outliers, and
     * <code>false otherwise.
     *
     * @return A boolean.
     */
    public boolean isMultiple() {
        return this.multiple;
    }

    /**
     * Sets the flag that indicates whether or not this list represents
     * multiple outliers.
     *
     * @param multiple  the flag.
     */
    public void setMultiple(boolean multiple) {
        this.multiple = multiple;
    }

    /**
     * Returns <code>true if the outlier overlaps, and
     * <code>false otherwise.
     *
     * @param other  the outlier.
     *
     * @return A boolean.
     */
    public boolean isOverlapped(Outlier other) {

        if (other == null) {
            return false;
        }

        boolean result = other.overlaps(getAveragedOutlier());
        return result;

    }

    /**
     * Updates the averaged outlier.
     *
     */
    public void updateAveragedOutlier() {
        double totalXCoords = 0.0;
        double totalYCoords = 0.0;
        int size = getItemCount();
        for (Iterator iterator = this.outliers.iterator();
                iterator.hasNext();) {
            Outlier o = (Outlier) iterator.next();
            totalXCoords += o.getX();
            totalYCoords += o.getY();
        }
        getAveragedOutlier().getPoint().setLocation(
                new Point2D.Double(totalXCoords / size, totalYCoords / size));
    }

}

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