KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > jfree > data > xy > AbstractXYZDataset


1 /* ===========================================================
2  * JFreeChart : a free chart library for the Java(tm) platform
3  * ===========================================================
4  *
5  * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
6  *
7  * Project Info: http://www.jfree.org/jfreechart/index.html
8  *
9  * This library is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU Lesser General Public License as published by
11  * the Free Software Foundation; either version 2.1 of the License, or
12  * (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17  * License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22  * USA.
23  *
24  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
25  * in the United States and other countries.]
26  *
27  * -----------------------
28  * AbstractXYZDataset.java
29  * -----------------------
30  * (C) Copyright 2004, by Object Refinery Limited.
31  *
32  * Original Author: David Gilbert (for Object Refinery Limited).
33  * Contributor(s): -;
34  *
35  * $Id: AbstractXYZDataset.java,v 1.2.2.1 2005/10/25 21:36:51 mungady Exp $
36  *
37  * Changes
38  * -------
39  * 05-May-2004 : Version 1 (DG);
40  * 15-Jul-2004 : Switched getZ() and getZValue() (DG);
41  *
42  */
43
44 package org.jfree.data.xy;
45
46
47 /**
48  * An base class that you can use to create new implementations of the
49  * {@link XYZDataset} interface.
50  */
51 public abstract class AbstractXYZDataset extends AbstractXYDataset
52                                          implements XYZDataset {
53
54     /**
55      * Returns the z-value (as a double primitive) for an item within a series.
56      *
57      * @param series the series (zero-based index).
58      * @param item the item (zero-based index).
59      *
60      * @return The z-value.
61      */
62     public double getZValue(int series, int item) {
63         double result = Double.NaN;
64         Number JavaDoc z = getZ(series, item);
65         if (z != null) {
66             result = z.doubleValue();
67         }
68         return result;
69     }
70
71 }
72
Popular Tags