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Java > Open Source Codes > org > krysalis > jcharts > chartData > processors > StackedDataProcessor


1 /***********************************************************************************************
2  * File Info: $Id: StackedDataProcessor.java,v 1.1 2003/05/17 16:57:50 nathaniel_auvil Exp $
3  * Copyright (C) 2002
4  * Author: Nathaniel G. Auvil
5  * Contributor(s):
6  *
7  * Copyright 2002 (C) Nathaniel G. Auvil. All Rights Reserved.
8  *
9  * Redistribution and use of this software and associated documentation ("Software"), with or
10  * without modification, are permitted provided that the following conditions are met:
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12  * 1. Redistributions of source code must retain copyright statements and notices.
13  * Redistributions must also contain a copy of this document.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
16  * conditions and the following disclaimer in the documentation and/or other materials
17  * provided with the distribution.
18  *
19  * 3. The name "jCharts" or "Nathaniel G. Auvil" must not be used to endorse or promote
20  * products derived from this Software without prior written permission of Nathaniel G.
21  * Auvil. For written permission, please contact nathaniel_auvil@users.sourceforge.net
22  *
23  * 4. Products derived from this Software may not be called "jCharts" nor may "jCharts" appear
24  * in their names without prior written permission of Nathaniel G. Auvil. jCharts is a
25  * registered trademark of Nathaniel G. Auvil.
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27  * 5. Due credit should be given to the jCharts Project (http://jcharts.sourceforge.net/).
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38  ************************************************************************************************/
39
40 package org.krysalis.jcharts.chartData.processors;
41
42
43 import org.krysalis.jcharts.chartData.interfaces.IAxisChartDataSet;
44
45
46 /*********************************************************************************************
47  * Notes:
48  * 1) Stacked data cannot have any negative values. I don't think i have ever seen a
49  * stacked bar chart with negative values just as a side observation.
50  *
51  * ---->There has been one request for this though...
52  *
53  *
54  *
55  **********************************************************************************************/
56 abstract class StackedDataProcessor
57 {
58
59     /*******************************************************************************************
60      * <pre>This method should do a single pass through the data set and calculate all needed values,
61      * such as: min, max, sum, etc... so that we can do this in one pass through the data.
62      * Rather than once for each.</pre>
63      *
64      * @param iAxisChartDataSet
65      * @param axisChartDataProcessor
66      ********************************************************************************************/
67     public static final void processData( IAxisChartDataSet iAxisChartDataSet,
68                                                       AxisChartDataProcessor axisChartDataProcessor )
69     {
70         double value;
71
72         //LOOP
73 for( int i=0; i < iAxisChartDataSet.getNumberOfDataItems(); i++ )
74         {
75             value=0.0d;
76
77             //LOOP
78 for( int j=0; j < iAxisChartDataSet.getNumberOfDataSets(); j++ )
79             {
80                 value+=iAxisChartDataSet.getValue( j, i );
81             }
82
83             if( value > axisChartDataProcessor.getMaxValue() )
84             {
85                 axisChartDataProcessor.setMaxValue( value );
86             }
87
88             if( value < axisChartDataProcessor.getMinValue() )
89             {
90                 axisChartDataProcessor.setMinValue( value );
91             }
92         }
93     }
94
95 }
96
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