Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/jfreechart/PolygonDataset.java @ 1055:bb2679624c6a

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Implemented a new histogram dataset that takes the width of a single bin as well as the number of bins for the histogram (issue288). gnv-artifacts/trunk@1130 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 27 May 2010 07:41:14 +0000
parents 05bf8534a35a
children f953c9a559d8
rev   line source
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1 package de.intevation.gnv.jfreechart;
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2
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3 import java.util.ArrayList;
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4 import java.util.Collection;
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5 import java.util.List;
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6
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7 import org.jfree.data.Range;
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8
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9 import org.jfree.data.general.AbstractSeriesDataset;
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10
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11 /**
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12 * An implementation of {@link org.jfree.data.xy.XYDataset} to create 2D charts.
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13 * This dataset contains several <code>PolygonSeries</code> and is used by
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14 * <code>PolygonRenderer</code> to draw its items into a 2D chart.
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15 *
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16 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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17 */
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18 public class PolygonDataset
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19 extends AbstractSeriesDataset
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20 {
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21 /**
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22 * PolygonSeries included in this Dataset
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23 */
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24 private List data;
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25
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26
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27 /**
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28 * Constructor.
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29 */
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30 public PolygonDataset() {
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31 data = new ArrayList();
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32 }
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33
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34 /**
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35 * Constructs a new PolygonDataset containing multiple PolygonSeries.
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36 *
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37 * @param series A collection containing some PolygonSeries.
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38 */
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39 public PolygonDataset(Collection series) {
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40 data = new ArrayList(series);
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41 }
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42
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43 /**
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44 * Constructs a PolygonDataset with a single PolygonSeries.
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45 *
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46 * @param series A PolygonSeries.
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47 */
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48 public PolygonDataset(PolygonSeries series) {
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49 this();
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50
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51 if (series != null) {
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52 data.add(series);
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53 }
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54 }
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55
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56
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57 /**
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58 *
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59 * @param series
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60 */
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61 public void addSeries(PolygonSeries series) {
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62 if (series == null)
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63 throw new IllegalArgumentException("Null 'series' argument.");
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64
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65 data.add(series);
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66 }
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67
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68 /**
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69 *
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70 * @param series
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71 */
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72 public void addAllSeries(Collection<PolygonSeries> series) {
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73 data.addAll(series);
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74 }
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75
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76 /**
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77 * Retrieves the x-axis range of all PolygonSeries in this dataset.
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78 *
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79 * @return range of the x-axis.
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80 */
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81 public Range getDomainBounds() {
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82 double lower = Double.POSITIVE_INFINITY;
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83 double upper = Double.NEGATIVE_INFINITY;
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84 int seriesCount = getSeriesCount();
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85
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86 for (int s = 0; s < seriesCount; s++) {
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87 PolygonSeries series = getSeries(s);
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88
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89 Range domainRange = series.getDomainBounds();
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90 double minX = domainRange.getLowerBound();
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91 if (!Double.isNaN(minX)) {
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92 lower = Math.min(lower, minX);
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93 }
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94
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95 double maxX = domainRange.getUpperBound();
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96 if (!Double.isNaN(maxX)) {
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97 upper = Math.max(upper, maxX);
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98 }
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99 }
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100
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101 return new Range(lower, upper);
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102 }
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103
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104
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105 /**
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106 * Retrieves the y-axis range of all PolygonSeries in this dataset.
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107 *
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108 * @return the y-axis range.
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109 */
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110 public Range getRangeBounds() {
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111 double lower = Double.POSITIVE_INFINITY;
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112 double upper = Double.NEGATIVE_INFINITY;
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113 int seriesCount = getSeriesCount();
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114
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115 for (int i = 0; i < seriesCount; i++) {
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116 PolygonSeries series = getSeries(i);
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117
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118 Range range = series.getRangeBounds();
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119 double minX = range.getLowerBound();
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120 if (!Double.isNaN(minX)) {
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121 lower = Math.min(lower, minX);
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122 }
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123
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124 double maxX = range.getUpperBound();
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125 if (!Double.isNaN(maxX)) {
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126 upper = Math.max(upper, maxX);
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127 }
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128 }
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129
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130 return new Range(lower, upper);
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131 }
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132
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133
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134 /**
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135 * Returns the number of series in this dataset.
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136 *
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137 * @return the number of series in this dataset.
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138 */
422
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139 public int getSeriesCount() {
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140 return data.size();
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141 }
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142
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143
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144 /**
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145 * Returns the key for a series.
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146 *
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147 * @param index Index of a specific series.
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148 * @return the series key of the series with the given index.
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149 */
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150 public Comparable getSeriesKey(int index) {
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151 return ((PolygonSeries)data.get(index)).getKey();
422
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152 }
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153
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154
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155 /**
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156 *
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157 * @param idx Index.
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158 * @return the series with the given index.
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159 */
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160 public PolygonSeries getSeries(int idx) {
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161 return (PolygonSeries)data.get(idx);
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162 }
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163 }
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164 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org