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


1 /* ===========================================================
2  * JFreeChart : a free chart library for the Java(tm) platform
3  * ===========================================================
4  *
5  * (C) Copyright 2000-2006, 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  * XIntervalDataItem.java
29  * ----------------------
30  * (C) Copyright 2006, by Object Refinery Limited.
31  *
32  * Original Author: David Gilbert (for Object Refinery Limited);
33  * Contributor(s): -;
34  *
35  * $Id: XIntervalDataItem.java,v 1.1.2.1 2006/10/20 15:23:22 mungady Exp $
36  *
37  * Changes
38  * -------
39  * 20-Oct-2006 : Version 1 (DG);
40  *
41  */
42
43 package org.jfree.data.xy;
44
45 import org.jfree.data.ComparableObjectItem;
46
47 /**
48  * An item representing data in the form (x, x-low, x-high, y).
49  *
50  * @since 1.0.3
51  */
52 public class XIntervalDataItem extends ComparableObjectItem {
53
54     /**
55      * Creates a new instance of <code>YIntervalItem</code>.
56      *
57      * @param x the x-value.
58      * @param xLow the lower bound of the x-interval.
59      * @param xHigh the upper bound of the x-interval.
60      * @param y the y-value.
61      */
62     public XIntervalDataItem(double x, double xLow, double xHigh, double y) {
63         super(new Double JavaDoc(x), new YWithXInterval(y, xLow, xHigh));
64     }
65     
66     /**
67      * Returns the x-value.
68      *
69      * @return The x-value (never <code>null</code>).
70      */
71     public Number JavaDoc getX() {
72         return (Number JavaDoc) getComparable();
73     }
74     
75     /**
76      * Returns the y-value.
77      *
78      * @return The y-value.
79      */
80     public double getYValue() {
81         YWithXInterval interval = (YWithXInterval) getObject();
82         if (interval != null) {
83             return interval.getY();
84         }
85         else {
86             return Double.NaN;
87         }
88     }
89     
90     /**
91      * Returns the lower bound of the x-interval.
92      *
93      * @return The lower bound of the x-interval.
94      */
95     public double getXLowValue() {
96         YWithXInterval interval = (YWithXInterval) getObject();
97         if (interval != null) {
98             return interval.getXLow();
99         }
100         else {
101             return Double.NaN;
102         }
103     }
104     
105     /**
106      * Returns the upper bound of the x-interval.
107      *
108      * @return The upper bound of the x-interval.
109      */
110     public double getXHighValue() {
111         YWithXInterval interval = (YWithXInterval) getObject();
112         if (interval != null) {
113             return interval.getXHigh();
114         }
115         else {
116             return Double.NaN;
117         }
118     }
119     
120 }
121
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