1 | package org.openstreetmap.josm.actions.downloadtasks;
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2 |
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3 | import java.util.ArrayList;
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4 | import java.util.Date;
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5 | import java.util.HashSet;
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6 | import java.util.Iterator;
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7 | import java.util.List;
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8 | import java.util.Set;
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9 | import java.util.concurrent.Future;
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10 |
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11 | import org.openstreetmap.josm.Main;
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12 | import org.openstreetmap.josm.data.Bounds;
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13 | import org.openstreetmap.josm.data.osm.DataSet;
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14 | import org.openstreetmap.josm.data.osm.NodeData;
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15 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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16 | import org.openstreetmap.josm.data.osm.PrimitiveData;
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17 | import org.openstreetmap.josm.data.osm.PrimitiveId;
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18 | import org.openstreetmap.josm.data.osm.RelationData;
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19 | import org.openstreetmap.josm.data.osm.WayData;
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20 | import org.openstreetmap.josm.data.osm.history.History;
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21 | import org.openstreetmap.josm.data.osm.history.HistoryDataSet;
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22 | import org.openstreetmap.josm.data.osm.history.HistoryDataSetListener;
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23 | import org.openstreetmap.josm.data.osm.history.HistoryNode;
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24 | import org.openstreetmap.josm.data.osm.history.HistoryOsmPrimitive;
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25 | import org.openstreetmap.josm.data.osm.history.HistoryRelation;
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26 | import org.openstreetmap.josm.data.osm.history.HistoryWay;
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27 | import org.openstreetmap.josm.gui.history.HistoryLoadTask;
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28 | import org.openstreetmap.josm.gui.progress.ProgressMonitor;
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29 | import org.openstreetmap.josm.io.OsmServerLocationReader;
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30 | import org.openstreetmap.josm.io.OsmServerReader;
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31 | import org.openstreetmap.josm.io.OsmTransferException;
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32 | import org.openstreetmap.josm.tools.Pair;
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33 |
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34 | public class DownloadOsmChangeTask extends DownloadOsmTask {
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35 |
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36 | @Override
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37 | public boolean acceptsUrl(String url) {
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38 | return url != null && url.matches("http://.*/api/0.6/changeset/\\p{Digit}+/download");
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39 | }
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40 |
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41 | /* (non-Javadoc)
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42 | * @see org.openstreetmap.josm.actions.downloadtasks.DownloadOsmTask#download(boolean, org.openstreetmap.josm.data.Bounds, org.openstreetmap.josm.gui.progress.ProgressMonitor)
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43 | */
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44 | @Override
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45 | public Future<?> download(boolean newLayer, Bounds downloadArea,
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46 | ProgressMonitor progressMonitor) {
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47 | return null;
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48 | }
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49 |
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50 | /* (non-Javadoc)
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51 | * @see org.openstreetmap.josm.actions.downloadtasks.DownloadOsmTask#loadUrl(boolean, java.lang.String, org.openstreetmap.josm.gui.progress.ProgressMonitor)
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52 | */
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53 | @Override
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54 | public Future<?> loadUrl(boolean new_layer, String url,
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55 | ProgressMonitor progressMonitor) {
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56 | downloadTask = new DownloadTask(new_layer,
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57 | new OsmServerLocationReader(url),
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58 | progressMonitor);
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59 | return Main.worker.submit(downloadTask);
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60 | }
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61 |
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62 | protected class DownloadTask extends DownloadOsmTask.DownloadTask {
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63 |
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64 | public DownloadTask(boolean newLayer, OsmServerReader reader,
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65 | ProgressMonitor progressMonitor) {
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66 | super(newLayer, reader, progressMonitor);
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67 | }
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68 |
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69 | /* (non-Javadoc)
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70 | * @see org.openstreetmap.josm.actions.downloadtasks.DownloadOsmTask.DownloadTask#parseDataSet()
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71 | */
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72 | @Override
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73 | protected DataSet parseDataSet() throws OsmTransferException {
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74 | return reader.parseOsmChange(progressMonitor.createSubTaskMonitor(ProgressMonitor.ALL_TICKS, false));
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75 | }
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76 |
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77 | /* (non-Javadoc)
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78 | * @see org.openstreetmap.josm.actions.downloadtasks.DownloadOsmTask.DownloadTask#finish()
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79 | */
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80 | @Override
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81 | protected void finish() {
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82 | super.finish();
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83 | if (isFailed() || isCanceled() || downloadedData == null)
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84 | return; // user canceled download or error occurred
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85 | try {
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86 | // A changeset does not contain all referred primitives, this is the list of incomplete ones
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87 | Set<OsmPrimitive> toLoad = new HashSet<OsmPrimitive>();
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88 | // For each incomplete primitive, we'll have to get its state at date it was referred
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89 | List<Pair<OsmPrimitive, Date>> toMonitor = new ArrayList<Pair<OsmPrimitive, Date>>();
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90 | for (OsmPrimitive p : downloadedData.allNonDeletedPrimitives()) {
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91 | if (p.isIncomplete()) {
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92 | Date timestamp = null;
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93 | for (OsmPrimitive ref : p.getReferrers()) {
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94 | if (!ref.isTimestampEmpty()) {
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95 | timestamp = ref.getTimestamp();
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96 | break;
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97 | }
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98 | }
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99 | if (toLoad.add(p)) {
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100 | toMonitor.add(new Pair<OsmPrimitive, Date>(p, timestamp));
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101 | }
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102 | }
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103 | }
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104 | if (isCanceled()) return;
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105 | // Updating process is asynchronous and done after each history request
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106 | HistoryDataSet.getInstance().addHistoryDataSetListener(new HistoryListener(toMonitor));
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107 | // Let's load all required history
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108 | Main.worker.submit(new HistoryLoadTask().add(toLoad));
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109 | } catch (Exception e) {
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110 | rememberException(e);
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111 | setFailed(true);
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112 | }
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113 | }
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114 | }
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115 | /**
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116 | * Asynchroneous updater of incomplete primitives.
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117 | *
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118 | */
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119 | private static class HistoryListener implements HistoryDataSetListener {
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120 |
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121 | private final List<Pair<OsmPrimitive, Date>> toMonitor;
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122 |
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123 | public HistoryListener(List<Pair<OsmPrimitive, Date>> toMonitor) {
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124 | this.toMonitor = toMonitor;
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125 | }
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126 |
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127 | @Override
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128 | public void historyUpdated(HistoryDataSet source, PrimitiveId id) {
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129 | for (Iterator<Pair<OsmPrimitive, Date>> it = toMonitor.iterator(); it.hasNext();) {
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130 | Pair<OsmPrimitive, Date> pair = it.next();
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131 | History history = source.getHistory(pair.a.getPrimitiveId());
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132 | // If the history has been loaded and a timestamp is known
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133 | if (history != null && pair.b != null) {
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134 | // Lookup for the primitive version at the specified timestamp
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135 | HistoryOsmPrimitive hp = history.getByDate(pair.b);
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136 | if (hp != null) {
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137 | PrimitiveData data = null;
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138 |
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139 | switch (pair.a.getType()) {
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140 | case NODE:
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141 | data = new NodeData();
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142 | ((NodeData)data).setCoor(((HistoryNode)hp).getCoords());
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143 | break;
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144 | case WAY:
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145 | data = new WayData();
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146 | ((WayData)data).setNodes(((HistoryWay)hp).getNodes());
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147 | break;
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148 | case RELATION:
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149 | data = new RelationData();
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150 | ((RelationData)data).setMembers(((HistoryRelation)hp).getMembers());
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151 | break;
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152 | default: throw new AssertionError();
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153 | }
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154 |
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155 | data.setUser(hp.getUser());
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156 | try {
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157 | data.setVisible(hp.isVisible());
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158 | } catch (IllegalStateException e) {
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159 | System.err.println("Cannot change visibility for "+pair.a+": "+e.getMessage());
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160 | }
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161 | data.setTimestamp(hp.getTimestamp());
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162 | data.setKeys(hp.getTags());
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163 | data.setOsmId(hp.getChangesetId(), (int) hp.getVersion());
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164 |
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165 | // Load the history data
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166 | pair.a.load(data);
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167 | // Forget this primitive
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168 | it.remove();
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169 | }
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170 | }
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171 | }
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172 | if (toMonitor.isEmpty()) {
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173 | // No more primitive to update. Processing is finished
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174 | source.removeHistoryDataSetListener(this);
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175 | // Be sure all updated primitives are correctly drawn
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176 | Main.map.repaint();
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177 | }
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178 | }
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179 |
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180 | @Override
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181 | public void historyDataSetCleared(HistoryDataSet source) {
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182 | }
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183 | }
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184 | }
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