KickJava   Java API By Example, From Geeks To Geeks.

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


1 /***********************************************************************************************
2  * File Info: $Id: PieChartDataProcessor.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:
11  *
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.
26  *
27  * 5. Due credit should be given to the jCharts Project (http://jcharts.sourceforge.net/).
28  *
29  * THIS SOFTWARE IS PROVIDED BY Nathaniel G. Auvil AND CONTRIBUTORS ``AS IS'' AND ANY
30  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
31  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
32  * jCharts OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
33  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,STRICT LIABILITY, OR TORT
36  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
37  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
38  ************************************************************************************************/

39
40 package org.krysalis.jcharts.chartData.processors;
41
42
43 import org.krysalis.jcharts.chartData.interfaces.IPieChartDataSet;
44
45
46 /*******************************************************************************************
47  * Utility class to process the PieChartDataSet
48  *
49  *******************************************************************************************/

50 final public class PieChartDataProcessor
51 {
52     private IPieChartDataSet iPieChartDataSet;
53
54     private double sumOfData = 0;
55
56
57     /******************************************************************************************
58      * Constructor
59      *
60      * @param iPieChartDataSet
61      *******************************************************************************************/

62     public PieChartDataProcessor( IPieChartDataSet iPieChartDataSet )
63     {
64         this.iPieChartDataSet = iPieChartDataSet;
65     }
66
67
68     /*******************************************************************************************
69      * This method should do a single pass through the data set and calculate all needed values,
70      * such as: min, max, sum, etc... so that we can do this in one pass through the data.
71      * Rather than once for each.
72      *
73      ********************************************************************************************/

74     public void processData()
75     {
76         int size = this.iPieChartDataSet.getNumberOfDataItems();
77         for( int i = 0; i < size; i++ )
78         {
79             this.sumOfData += this.iPieChartDataSet.getValue( i );
80         }
81     }
82
83
84     /******************************************************************************************
85      * Returns percentage of pie(360 degrees) data point at specified index.
86      *
87      * @param index
88      * @return double
89      *******************************************************************************************/

90     public double getPercentageOfPie( int index )
91     {
92         return (this.iPieChartDataSet.getValue( index ) / this.sumOfData) * 360;
93     }
94
95
96 }
97
Popular Tags