Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/exports/LegendAggregator.java @ 9612:f8308db94634

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#20 UI, Diagramme
author dnt_bjoernsen <d.tironi@bjoernsen.de>
date Wed, 09 Oct 2019 16:17:16 +0200
parents ef5754ba5573
children
rev   line source
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1 /** Copyright (C) 2017 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by
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3 * Björnsen Beratende Ingenieure GmbH
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4 * Dr. Schumacher Ingenieurbüro für Wasser und Umwelt
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5 *
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6 * This file is Free Software under the GNU AGPL (>=v3)
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7 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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8 * documentation coming with Dive4Elements River for details.
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9 */
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10 package org.dive4elements.river.exports;
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11
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12 import java.awt.Font;
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13 import java.awt.Paint;
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14 import java.awt.Shape;
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15 import java.awt.Stroke;
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16 import java.util.AbstractMap.SimpleEntry;
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17 import java.util.ArrayList;
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18 import java.util.HashMap;
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19 import java.util.HashSet;
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20 import java.util.Iterator;
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21 import java.util.List;
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22 import java.util.Map;
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23 import java.util.Map.Entry;
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24 import java.util.Set;
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25
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26 import org.dive4elements.artifacts.CallContext;
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27 import org.dive4elements.river.artifacts.context.RiverContext;
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28 import org.dive4elements.river.artifacts.resources.Resources;
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29 import org.dive4elements.river.jfree.StyledSeries;
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30 import org.dive4elements.river.jfree.StyledXYDataset;
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31 import org.dive4elements.river.themes.Theme;
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32 import org.dive4elements.river.themes.ThemeDocument;
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33 import org.dive4elements.river.themes.ThemeFactory;
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34 import org.jfree.chart.LegendItem;
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35 import org.jfree.chart.LegendItemCollection;
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36 import org.jfree.chart.plot.XYPlot;
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37 import org.jfree.data.general.Dataset;
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38 import org.jfree.data.xy.XYSeries;
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39 import org.jfree.data.xy.XYSeriesCollection;
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40 import org.w3c.dom.Document;
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41
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42 /**
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43 * Builds and adds legend entries to the plot.
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44 *
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45 * @author Gernot Belger
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46 */
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47 public class LegendAggregator {
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48
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49 private static final String NULL_THEME_TYPE = ""; //$NON-NLS-1$
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50
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51 private static final String I10N_MERGED = "legend.aggregator.merged"; //$NON-NLS-1$
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52
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53 private final List<Map.Entry<LegendItem, String>> legendItems = new ArrayList<>();
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54
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55 private final Map<String, List<LegendItem>> itemsPerThemeType = new HashMap<>();
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56
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57 private final Font labelFont;
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58
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59 private final int aggregationThreshold;
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60
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61 public LegendAggregator(final int aggregationThreshold, final Font labelFont) {
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62 this.aggregationThreshold = aggregationThreshold;
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63 this.labelFont = labelFont;
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64 }
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65
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66 public void addLegendItem(final String themeType, final LegendItem item) {
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67
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68 item.setLabelFont(this.labelFont);
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69
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70 this.legendItems.add(new SimpleEntry<>(item, themeType));
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71
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72 final List<LegendItem> perThemeType = getItemsPerThemeType(themeType);
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73 perThemeType.add(item);
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74 }
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75
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76 private List<LegendItem> getItemsPerThemeType(final String themeType) {
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77
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78 final String key = themeType == null ? NULL_THEME_TYPE : themeType;
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79
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80 if (!this.itemsPerThemeType.containsKey(key))
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81 this.itemsPerThemeType.put(key, new ArrayList<LegendItem>());
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82
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83 return this.itemsPerThemeType.get(key);
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84 }
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85
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86 /**
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87 * Apply the gathered items to the plot. Use only once.
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88 */
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89 public void apply(final CallContext context, final XYPlot plot) {
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90
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91 final LegendItemCollection aggregatedItems = new LegendItemCollection();
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92
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93 /* marker set for types that are already aggregated */
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94 final Set<String> aggregatedTypes = new HashSet<>();
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95
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96 for (final Entry<LegendItem, String> entry : this.legendItems) {
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97
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98 final LegendItem item = entry.getKey();
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99 final String themeType = entry.getValue();
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100
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101 /* ignore already aggregated items */
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102 if (aggregatedTypes.contains(themeType))
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103 continue;
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104
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105 /* aggregate known types if count over threshold */
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106 final Theme legendTheme = getLegendTheme(context, themeType);
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107
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108 if (legendTheme != null && getItemsPerThemeType(themeType).size() > this.aggregationThreshold) {
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109
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110 final String labelDescription = Resources.getMsg(context.getMeta(), legendTheme.getDescription());
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111 final String labelMerged = Resources.getMsg(context.getMeta(), I10N_MERGED);
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112 final String label = String.format("%s (%s)", labelDescription, labelMerged);
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113
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114 final List<LegendItem> items = findDistinctItems(getItemsPerThemeType(themeType));
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115 /* add items for each distinct shape, only the last one gets the label */
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116 for (final Iterator<LegendItem> iterator = items.iterator(); iterator.hasNext();) {
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117
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118 final LegendItem legendItem = iterator.next();
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119 final String itemLabel = iterator.hasNext() ? "," : label;
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120
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121 /* create and add aggregated item(s) */
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122 final LegendItem aggregatedItem = createAggregatedItem(legendItem, legendTheme, itemLabel);
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123 aggregatedItems.add(aggregatedItem);
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124 }
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125
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126 /* mark as handles */
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127 aggregatedTypes.add(themeType);
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128
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129 } else {
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130 /* simply add normal items */
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131 aggregatedItems.add(item);
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132 }
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133 }
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134
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135 plot.setFixedLegendItems(aggregatedItems);
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136
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137 this.itemsPerThemeType.clear();
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138 this.legendItems.clear();
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139 }
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140
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141 /**
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142 * Extract distinct items, curently only those that are different regarding their shape
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143 */
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144 private List<LegendItem> findDistinctItems(final List<LegendItem> items) {
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145
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f8308db94634 #20 UI, Diagramme
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146 final Map<Shape, LegendItem> shapeMap = new HashMap<>();
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147
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148 for (final LegendItem item : items) {
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149
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150 final Shape shape = item.isShapeVisible() ? item.getShape() : null;
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151 if (!shapeMap.containsKey(shape))
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152 shapeMap.put(shape, item);
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153 }
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154
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155 return new ArrayList<>(shapeMap.values());
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156 }
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157
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158 private LegendItem createAggregatedItem(final LegendItem item, final Theme legendTheme, final String label) {
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159 /* clone properties from current item */
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160 final String description = item.getDescription();
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161 final String tooltipText = item.getToolTipText();
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162 final String urlText = item.getURLText();
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163 final boolean shapeVisible = item.isShapeVisible();
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164 final Shape shape = item.getShape();
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165 final boolean shapeFilled = item.isShapeFilled();
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166 final Paint fillPaint = item.getFillPaint();
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167 final boolean shapeOutlineVisible = item.isShapeOutlineVisible();
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168 final Paint outlinePaint = item.getOutlinePaint();
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169 final Stroke outlineStroke = item.getOutlineStroke();
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170 final boolean lineVisible = item.isLineVisible();
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171 final Shape line = item.getLine();
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172 final Stroke lineStroke = item.getLineStroke();
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173 final Paint linePaint = item.getLinePaint();
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174 final LegendItem aggregatedItem = new LegendItem(label, description, tooltipText, urlText, shapeVisible, shape, shapeFilled, fillPaint,
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175 shapeOutlineVisible, outlinePaint, outlineStroke, lineVisible, line, lineStroke, linePaint);
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176
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177 aggregatedItem.setDataset(item.getDataset());
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178 aggregatedItem.setDatasetIndex(item.getDatasetIndex());
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179 aggregatedItem.setFillPaintTransformer(item.getFillPaintTransformer());
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180 aggregatedItem.setLabelFont(item.getLabelFont());
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181 aggregatedItem.setLabelPaint(item.getLabelPaint());
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182 aggregatedItem.setSeriesIndex(item.getSeriesIndex());
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183
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184 /* let styled dataset apply specific theme configuration */
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185 applyThemeToLegend(aggregatedItem, legendTheme);
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186
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187 return aggregatedItem;
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188 }
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189
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190 private void applyThemeToLegend(final LegendItem item, final Theme legendTheme) {
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191
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192 final Dataset dataset = item.getDataset();
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193 if (dataset == null)
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194 return;
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195
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196 final Document xml = legendTheme.toXML();
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197 final ThemeDocument themeDocument = new ThemeDocument(xml);
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198
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199 if (dataset instanceof StyledXYDataset) {
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200 final StyledXYDataset styledDataset = (StyledXYDataset) dataset;
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201 styledDataset.applyAggregatedLegendTheme(item, themeDocument);
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202 return;
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203 }
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204
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205 if (dataset instanceof XYSeriesCollection) {
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206
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207 final int seriesIndex = item.getSeriesIndex();
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208
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209 final XYSeriesCollection seriesCollection = (XYSeriesCollection) dataset;
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210 if (seriesIndex >= 0 && seriesIndex < seriesCollection.getSeriesCount()) {
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211 final XYSeries series = seriesCollection.getSeries(seriesIndex);
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212
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213 if (series instanceof StyledSeries) {
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214 ((StyledSeries) series).applyAggregatedLegendTheme(item, themeDocument);
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215 }
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216 }
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217 }
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218 }
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219
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220 private Theme getLegendTheme(final CallContext context, final String themeType) {
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221
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222 final RiverContext flysContext = context instanceof RiverContext ? (RiverContext) context : (RiverContext) context.globalContext();
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223
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224 return ThemeFactory.getLegendTheme(flysContext, themeType);
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225 }
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226 }
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