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jfreechart example source code file (TickUnit.java)

This example jfreechart source code file (TickUnit.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

comparable, comparable, io, serializable, serializable, string, string, tickunit, tickunit

The jfreechart TickUnit.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.]
 *
 * -------------
 * TickUnit.java
 * -------------
 * (C) Copyright 2001-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 19-Dec-2001 : Added standard header (DG);
 * 01-May-2002 : Changed the unit size from Number to double (DG);
 * 26-Sep-2002 : Fixed errors reported by Checkstyle (DG);
 * 08-Nov-2002 : Moved to new package com.jrefinery.chart.axis (DG);
 * 26-Mar-2003 : Implemented Serializable (DG);
 * 05-Sep-2005 : Implemented hashCode(), thanks to Thomas Morgner (DG);
 * 02-Aug-2007 : Added minorTickCount attribute (DG);
 *
 */

package org.jfree.chart.axis;

import java.io.Serializable;

/**
 * Base class representing a tick unit.  This determines the spacing of the
 * tick marks on an axis.
 * <P>
 * This class (and any subclasses) should be immutable, the reason being that
 * ORDERED collections of tick units are maintained and if one instance can be
 * changed, it may destroy the order of the collection that it belongs to.
 * In addition, if the implementations are immutable, they can belong to
 * multiple collections.
 *
 * @see ValueAxis
 */
public abstract class TickUnit implements Comparable, Serializable {

    /** For serialization. */
    private static final long serialVersionUID = 510179855057013974L;

    /** The size of the tick unit. */
    private double size;

    /**
     * The number of minor ticks.
     *
     * @since 1.0.7
     */
    private int minorTickCount;

    /**
     * Constructs a new tick unit.
     *
     * @param size  the tick unit size.
     */
    public TickUnit(double size) {
        this.size = size;
    }

    /**
     * Constructs a new tick unit.
     *
     * @param size  the tick unit size.
     * @param minorTickCount  the minor tick count.
     *
     * @since 1.0.7
     */
    public TickUnit(double size, int minorTickCount) {
        this.size = size;
        this.minorTickCount = minorTickCount;
    }

    /**
     * Returns the size of the tick unit.
     *
     * @return The size of the tick unit.
     */
    public double getSize() {
        return this.size;
    }

    /**
     * Returns the minor tick count.
     *
     * @return The minor tick count.
     *
     * @since 1.0.7
     */
    public int getMinorTickCount() {
        return this.minorTickCount;
    }

    /**
     * Converts the supplied value to a string.
     * <P>
     * Subclasses may implement special formatting by overriding this method.
     *
     * @param value  the data value.
     *
     * @return Value as string.
     */
    public String valueToString(double value) {
        return String.valueOf(value);
    }

    /**
     * Compares this tick unit to an arbitrary object.
     *
     * @param object  the object to compare against.
     *
     * @return <code>1 if the size of the other object is less than this,
     *      <code>0 if both have the same size and -1 this
     *      size is less than the others.
     */
    public int compareTo(Object object) {

        if (object instanceof TickUnit) {
            TickUnit other = (TickUnit) object;
            if (this.size > other.getSize()) {
                return 1;
            }
            else if (this.size < other.getSize()) {
                return -1;
            }
            else {
                return 0;
            }
        }
        else {
            return -1;
        }

    }

    /**
     * Tests this unit for equality with another object.
     *
     * @param obj  the object.
     *
     * @return <code>true or false.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof TickUnit)) {
            return false;
        }
        TickUnit that = (TickUnit) obj;
        if (this.size != that.size) {
            return false;
        }
        if (this.minorTickCount != that.minorTickCount) {
            return false;
        }
        return true;
    }

    /**
     * Returns a hash code for this instance.
     *
     * @return A hash code.
     */
    public int hashCode() {
        long temp = this.size != +0.0d ? Double.doubleToLongBits(this.size)
                : 0L;
        return (int) (temp ^ (temp >>> 32));
    }

}

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