/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2011, 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.]
*
* -------------------
* VectorDataItem.java
* -------------------
* (C) Copyright 2007-2009, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 30-Jan-2007 : Version 1 (DG);
* 24-May-2007 : Added getVector(), renamed getDeltaX() --> getVectorX(),
* and likewise for getDeltaY() (DG);
* 25-May-2007 : Moved from experimental to the main source tree (DG);
*
*/
package org.jfree.data.xy;
import org.jfree.data.ComparableObjectItem;
/**
* A data item representing data in the form (x, y, deltaX, deltaY), intended
* for use by the {@link VectorSeries} class.
*
* @since 1.0.6
*/
public class VectorDataItem extends ComparableObjectItem {
/**
* Creates a new instance of <code>VectorDataItem</code>.
*
* @param x the x-value.
* @param y the y-value.
* @param deltaX the vector x.
* @param deltaY the vector y.
*/
public VectorDataItem(double x, double y, double deltaX, double deltaY) {
super(new XYCoordinate(x, y), new Vector(deltaX, deltaY));
}
/**
* Returns the x-value.
*
* @return The x-value (never <code>null</code>).
*/
public double getXValue() {
XYCoordinate xy = (XYCoordinate) getComparable();
return xy.getX();
}
/**
* Returns the y-value.
*
* @return The y-value.
*/
public double getYValue() {
XYCoordinate xy = (XYCoordinate) getComparable();
return xy.getY();
}
/**
* Returns the vector.
*
* @return The vector (possibly <code>null</code>).
*/
public Vector getVector() {
return (Vector) getObject();
}
/**
* Returns the x-component for the vector.
*
* @return The x-component.
*/
public double getVectorX() {
Vector vi = (Vector) getObject();
if (vi != null) {
return vi.getX();
}
else {
return Double.NaN;
}
}
/**
* Returns the y-component for the vector.
*
* @return The y-component.
*/
public double getVectorY() {
Vector vi = (Vector) getObject();
if (vi != null) {
return vi.getY();
}
else {
return Double.NaN;
}
}
}
|