/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2007, 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.]
*
* -------------------
* NumberTickUnit.java
* -------------------
* (C) Copyright 2001-2007, 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 : Updated for changed to TickUnit class (DG);
* 01-Oct-2002 : Fixed errors reported by Checkstyle (DG);
* 08-Nov-2002 : Moved to new package com.jrefinery.chart.axis (DG);
* 09-Jan-2002 : Added a new constructor (DG);
* 26-Mar-2003 : Implemented Serializable (DG);
* 05-Jul-2005 : Added equals() implementation (DG);
* 05-Sep-2005 : Implemented hashCode(), thanks to Thomas Morgner (DG);
* 02-Aug-2007 : Added new constructor with minorTickCount (DG);
*
*/
package org.jfree.chart.axis;
import java.io.Serializable;
import java.text.NumberFormat;
/**
* A numerical tick unit.
*/
public class NumberTickUnit extends TickUnit implements Serializable {
/** For serialization. */
private static final long serialVersionUID = 3849459506627654442L;
/** A formatter for the tick unit. */
private NumberFormat formatter;
/**
* Creates a new number tick unit.
*
* @param size the size of the tick unit.
*/
public NumberTickUnit(double size) {
this(size, NumberFormat.getNumberInstance());
}
/**
* Creates a new number tick unit.
*
* @param size the size of the tick unit.
* @param formatter a number formatter for the tick unit (<code>null</code>
* not permitted).
*/
public NumberTickUnit(double size, NumberFormat formatter) {
super(size);
if (formatter == null) {
throw new IllegalArgumentException("Null 'formatter' argument.");
}
this.formatter = formatter;
}
/**
* Creates a new number tick unit.
*
* @param size the size of the tick unit.
* @param formatter a number formatter for the tick unit (<code>null</code>
* not permitted).
* @param minorTickCount the number of minor ticks.
*
* @since 1.0.7
*/
public NumberTickUnit(double size, NumberFormat formatter,
int minorTickCount) {
super(size, minorTickCount);
if (formatter == null) {
throw new IllegalArgumentException("Null 'formatter' argument.");
}
this.formatter = formatter;
}
/**
* Converts a value to a string.
*
* @param value the value.
*
* @return The formatted string.
*/
public String valueToString(double value) {
return this.formatter.format(value);
}
/**
* Tests this formatter 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 NumberTickUnit)) {
return false;
}
if (!super.equals(obj)) {
return false;
}
NumberTickUnit that = (NumberTickUnit) obj;
if (!this.formatter.equals(that.formatter)) {
return false;
}
return true;
}
/**
* Returns a string representing this unit.
*
* @return A string.
*/
public String toString() {
return "[size=" + this.valueToString(this.getSize()) + "]";
}
/**
* Returns a hash code for this instance.
*
* @return A hash code.
*/
public int hashCode() {
int result = super.hashCode();
result = 29 * result + (this.formatter != null
? this.formatter.hashCode() : 0);
return result;
}
}
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