/* ===========================================================
* 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.]
*
* -----------------------
* AbstractXYZDataset.java
* -----------------------
* (C) Copyright 2004, 2007, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited).
* Contributor(s): -;
*
* Changes
* -------
* 05-May-2004 : Version 1 (DG);
* 15-Jul-2004 : Switched getZ() and getZValue() (DG);
*
*/
package org.jfree.data.xy;
/**
* An base class that you can use to create new implementations of the
* {@link XYZDataset} interface.
*/
public abstract class AbstractXYZDataset extends AbstractXYDataset
implements XYZDataset {
/**
* Returns the z-value (as a double primitive) for an item within a series.
*
* @param series the series (zero-based index).
* @param item the item (zero-based index).
*
* @return The z-value.
*/
public double getZValue(int series, int item) {
double result = Double.NaN;
Number z = getZ(series, item);
if (z != null) {
result = z.doubleValue();
}
return result;
}
}
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