01: /***********************************************************************************************
02: * File Info: $Id: PieChartDataProcessor.java,v 1.1 2003/05/17 16:57:50 nathaniel_auvil Exp $
03: * Copyright (C) 2002
04: * Author: Nathaniel G. Auvil
05: * Contributor(s):
06: *
07: * Copyright 2002 (C) Nathaniel G. Auvil. All Rights Reserved.
08: *
09: * 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: ************************************************************************************************/package org.krysalis.jcharts.chartData.processors;
39:
40: import org.krysalis.jcharts.chartData.interfaces.IPieChartDataSet;
41:
42: /*******************************************************************************************
43: * Utility class to process the PieChartDataSet
44: *
45: *******************************************************************************************/
46: final public class PieChartDataProcessor {
47: private IPieChartDataSet iPieChartDataSet;
48:
49: private double sumOfData = 0;
50:
51: /******************************************************************************************
52: * Constructor
53: *
54: * @param iPieChartDataSet
55: *******************************************************************************************/
56: public PieChartDataProcessor(IPieChartDataSet iPieChartDataSet) {
57: this .iPieChartDataSet = iPieChartDataSet;
58: }
59:
60: /*******************************************************************************************
61: * This method should do a single pass through the data set and calculate all needed values,
62: * such as: min, max, sum, etc... so that we can do this in one pass through the data.
63: * Rather than once for each.
64: *
65: ********************************************************************************************/
66: public void processData() {
67: int size = this .iPieChartDataSet.getNumberOfDataItems();
68: for (int i = 0; i < size; i++) {
69: this .sumOfData += this .iPieChartDataSet.getValue(i);
70: }
71: }
72:
73: /******************************************************************************************
74: * Returns percentage of pie(360 degrees) data point at specified index.
75: *
76: * @param index
77: * @return double
78: *******************************************************************************************/
79: public double getPercentageOfPie(int index) {
80: return (this .iPieChartDataSet.getValue(index) / this .sumOfData) * 360;
81: }
82:
83: }
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