org.jfree.chart.axis.TickUnit Maven / Gradle / Ivy
Show all versions of jfreechart Show documentation
/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2020, 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.
*
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
* Other names may be trademarks of their respective owners.]
*
* -------------
* 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.
*
* 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.
*
* 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 {@code -1} this
* size is less than the others.
*/
@Override
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 {@code false}.
*/
@Override
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.
*/
@Override
public int hashCode() {
long temp = this.size != +0.0d ? Double.doubleToLongBits(this.size)
: 0L;
return (int) (temp ^ (temp >>> 32));
}
}