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Java > Open Source Codes > de > progra > charting > model > ChartDataModelConstraints


1 /*
2     JOpenChart Java Charting Library and Toolkit
3     Copyright (C) 2001 Sebastian Müller
4     http://jopenchart.sourceforge.net
5
6     This library is free software; you can redistribute it and/or
7     modify it under the terms of the GNU Lesser General Public
8     License as published by the Free Software Foundation; either
9     version 2.1 of the License, or (at your option) any later version.
10
11     This library is distributed in the hope that it will be useful,
12     but WITHOUT ANY WARRANTY; without even the implied warranty of
13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14     Lesser General Public License for more details.
15
16     You should have received a copy of the GNU Lesser General Public
17     License along with this library; if not, write to the Free Software
18     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19
20     ChartDataModelConstraints.java
21     Created on 30. Juni 2001, 22:20
22 */
23
24 package de.progra.charting.model;
25
26 /**
27  * This interface is used by the rendering algorithm for a coordinate system.
28  * It defines the range of values.
29  * @author mueller
30  * @version 1.0
31  */
32 public interface ChartDataModelConstraints {
33         
34     /** Returns the minimum value of all datasets.
35      * @return a Number object defining the smallest value.
36      */
37     public Number JavaDoc getMinimumValue();
38
39     /** Returns the maximum value of all datasets.
40      * @return a Number object defining the maximum value
41      */
42     public Number JavaDoc getMaximumValue();
43
44     /** Returns the minimum column value.
45      * @return In the case of non-numeric x-values this should be 0, in the case
46      * of numeric x-values this should nomen est omen be the smallest
47      * value.
48      */
49     public double getMinimumColumnValue();
50     
51     /** Returns the maximum column value.
52      * @return In the case of non-numeric x-values this should be the amount of columns - 1, in the case of numeric x-values this should nomen est omen be the smallest value.
53      */
54     public double getMaximumColumnValue();
55 }
56
57
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