/* ===========================================================
* 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.]
*
* -----------------
* XYCoordinate.java
* -----------------
* (C) Copyright 2007, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 30-Jan-2007 : Version 1 (DG);
* 25-May-2007 : Moved from experimental to the main source tree (DG);
*
*/
package org.jfree.data.xy;
import java.io.Serializable;
/**
* Represents an (x, y) coordinate.
*
* @since 1.0.6
*/
public class XYCoordinate implements Comparable, Serializable {
/** The x-coordinate. */
private double x;
/** The y-coordinate. */
private double y;
/**
* Creates a new coordinate for the point (0.0, 0.0).
*/
public XYCoordinate() {
this(0.0, 0.0);
}
/**
* Creates a new coordinate for the point (x, y).
*
* @param x the x-coordinate.
* @param y the y-coordinate.
*/
public XYCoordinate(double x, double y) {
this.x = x;
this.y = y;
}
/**
* Returns the x-coordinate.
*
* @return The x-coordinate.
*/
public double getX() {
return this.x;
}
/**
* Returns the y-coordinate.
*
* @return The y-coordinate.
*/
public double getY() {
return this.y;
}
/**
* Tests this coordinate 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 XYCoordinate)) {
return false;
}
XYCoordinate that = (XYCoordinate) obj;
if (this.x != that.x) {
return false;
}
if (this.y != that.y) {
return false;
}
return true;
}
/**
* Returns a hash code for this instance.
*
* @return A hash code.
*/
public int hashCode() {
int result = 193;
long temp = Double.doubleToLongBits(this.x);
result = 37 * result + (int) (temp ^ (temp >>> 32));
temp = Double.doubleToLongBits(this.y);
result = 37 * result + (int) (temp ^ (temp >>> 32));
return result;
}
/**
* Returns a string representation of this instance, primarily for
* debugging purposes.
*
* @return A string.
*/
public String toString() {
return "(" + this.x + ", " + this.y + ")";
}
/**
* Compares this instance against an arbitrary object.
*
* @param obj the object (<code>null</code> not permitted).
*
* @return An integer indicating the relative order of the items.
*/
public int compareTo(Object obj) {
if (!(obj instanceof XYCoordinate)) {
throw new IllegalArgumentException("Incomparable object.");
}
XYCoordinate that = (XYCoordinate) obj;
if (this.x > that.x) {
return 1;
}
else if (this.x < that.x) {
return -1;
}
else {
if (this.y > that.y) {
return 1;
}
else if (this.y < that.y) {
return -1;
}
}
return 0;
}
}
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