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jfreechart example source code file (SimpleHistogramBin.java)

This example jfreechart source code file (SimpleHistogramBin.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

cloneable, clonenotsupportedexception, clonenotsupportedexception, comparable, illegalargumentexception, invalid, io, object, object, publiccloneable, publiccloneable, serializable, simplehistogrambin, simplehistogrambin

The jfreechart SimpleHistogramBin.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.]
 *
 * -----------------------
 * SimpleHistogramBin.java
 * -----------------------
 * (C) Copyright 2005-2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 10-Jan-2005 : Version 1 (DG);
 *
 */

package org.jfree.data.statistics;

import java.io.Serializable;

import org.jfree.util.PublicCloneable;

/**
 * A bin for the {@link SimpleHistogramDataset}.
 */
public class SimpleHistogramBin implements Comparable,
        Cloneable, PublicCloneable, Serializable {

    /** For serialization. */
    private static final long serialVersionUID = 3480862537505941742L;

    /** The lower bound for the bin. */
    private double lowerBound;

    /** The upper bound for the bin. */
    private double upperBound;

    /**
     * A flag that controls whether the lower bound is included in the bin
     * range.
     */
    private boolean includeLowerBound;

    /**
     * A flag that controls whether the upper bound is included in the bin
     * range.
     */
    private boolean includeUpperBound;

    /** The item count. */
    private int itemCount;

    /**
     * Creates a new bin.
     *
     * @param lowerBound  the lower bound (inclusive).
     * @param upperBound  the upper bound (inclusive);
     */
    public SimpleHistogramBin(double lowerBound, double upperBound) {
        this(lowerBound, upperBound, true, true);
    }

    /**
     * Creates a new bin.
     *
     * @param lowerBound  the lower bound.
     * @param upperBound  the upper bound.
     * @param includeLowerBound  include the lower bound?
     * @param includeUpperBound  include the upper bound?
     */
    public SimpleHistogramBin(double lowerBound, double upperBound,
                              boolean includeLowerBound,
                              boolean includeUpperBound) {
        if (lowerBound >= upperBound) {
            throw new IllegalArgumentException("Invalid bounds");
        }
        this.lowerBound = lowerBound;
        this.upperBound = upperBound;
        this.includeLowerBound = includeLowerBound;
        this.includeUpperBound = includeUpperBound;
        this.itemCount = 0;
    }

    /**
     * Returns the lower bound.
     *
     * @return The lower bound.
     */
    public double getLowerBound() {
        return this.lowerBound;
    }

    /**
     * Return the upper bound.
     *
     * @return The upper bound.
     */
    public double getUpperBound() {
        return this.upperBound;
    }

    /**
     * Returns the item count.
     *
     * @return The item count.
     */
    public int getItemCount() {
        return this.itemCount;
    }

    /**
     * Sets the item count.
     *
     * @param count  the item count.
     */
    public void setItemCount(int count) {
        this.itemCount = count;
    }

    /**
     * Returns <code>true if the specified value belongs in the bin,
     * and <code>false otherwise.
     *
     * @param value  the value.
     *
     * @return A boolean.
     */
    public boolean accepts(double value) {
        if (Double.isNaN(value)) {
            return false;
        }
        if (value < this.lowerBound) {
            return false;
        }
        if (value > this.upperBound) {
            return false;
        }
        if (value == this.lowerBound) {
            return this.includeLowerBound;
        }
        if (value == this.upperBound) {
            return this.includeUpperBound;
        }
        return true;
    }

    /**
     * Returns <code>true if this bin overlaps with the specified bin,
     * and <code>false otherwise.
     *
     * @param bin  the other bin (<code>null not permitted).
     *
     * @return A boolean.
     */
    public boolean overlapsWith(SimpleHistogramBin bin) {
        if (this.upperBound < bin.lowerBound) {
            return false;
        }
        if (this.lowerBound > bin.upperBound) {
            return false;
        }
        if (this.upperBound == bin.lowerBound) {
            return this.includeUpperBound && bin.includeLowerBound;
        }
        if (this.lowerBound == bin.upperBound) {
            return this.includeLowerBound && bin.includeUpperBound;
        }
        return true;
    }

    /**
     * Compares the bin to an arbitrary object and returns the relative
     * ordering.
     *
     * @param obj  the object.
     *
     * @return An integer indicating the relative ordering of the this bin and
     *         the given object.
     */
    public int compareTo(Object obj) {
        if (!(obj instanceof SimpleHistogramBin)) {
            return 0;
        }
        SimpleHistogramBin bin = (SimpleHistogramBin) obj;
        if (this.lowerBound < bin.lowerBound) {
            return -1;
        }
        if (this.lowerBound > bin.lowerBound) {
            return 1;
        }
        // lower bounds are the same
        if (this.upperBound < bin.upperBound) {
            return -1;
        }
        if (this.upperBound > bin.upperBound) {
            return 1;
        }
        return 0;
    }

    /**
     * Tests this bin for equality with an arbitrary object.
     *
     * @param obj  the object (<code>null permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (!(obj instanceof SimpleHistogramBin)) {
            return false;
        }
        SimpleHistogramBin that = (SimpleHistogramBin) obj;
        if (this.lowerBound != that.lowerBound) {
            return false;
        }
        if (this.upperBound != that.upperBound) {
            return false;
        }
        if (this.includeLowerBound != that.includeLowerBound) {
            return false;
        }
        if (this.includeUpperBound != that.includeUpperBound) {
            return false;
        }
        if (this.itemCount != that.itemCount) {
            return false;
        }
        return true;
    }

    /**
     * Returns a clone of the bin.
     *
     * @return A clone.
     *
     * @throws CloneNotSupportedException not thrown by this class.
     */
    public Object clone() throws CloneNotSupportedException {
        return super.clone();
    }

}

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