1 | // License: GPL. Copyright 2007 by Immanuel Scholz and others
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2 | package org.openstreetmap.josm.actions.downloadtasks;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.tr;
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5 |
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6 | import java.io.IOException;
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7 | import java.util.Collection;
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8 | import java.util.concurrent.Future;
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9 | import java.util.logging.Logger;
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10 |
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11 | import javax.swing.JCheckBox;
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12 |
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13 | import org.openstreetmap.josm.Main;
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14 | import org.openstreetmap.josm.actions.DownloadAction;
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15 | import org.openstreetmap.josm.data.Bounds;
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16 | import org.openstreetmap.josm.data.coor.LatLon;
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17 | import org.openstreetmap.josm.data.osm.DataSet;
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18 | import org.openstreetmap.josm.data.osm.DataSource;
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19 | import org.openstreetmap.josm.gui.ExceptionDialogUtil;
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20 | import org.openstreetmap.josm.gui.PleaseWaitRunnable;
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21 | import org.openstreetmap.josm.gui.download.DownloadDialog.DownloadTask;
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22 | import org.openstreetmap.josm.gui.layer.Layer;
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23 | import org.openstreetmap.josm.gui.layer.OsmDataLayer;
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24 | import org.openstreetmap.josm.gui.progress.NullProgressMonitor;
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25 | import org.openstreetmap.josm.gui.progress.ProgressMonitor;
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26 | import org.openstreetmap.josm.io.BoundingBoxDownloader;
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27 | import org.openstreetmap.josm.io.OsmServerLocationReader;
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28 | import org.openstreetmap.josm.io.OsmServerReader;
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29 | import org.openstreetmap.josm.io.OsmTransferException;
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30 | import org.xml.sax.SAXException;
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31 |
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32 |
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33 | /**
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34 | * Open the download dialog and download the data.
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35 | * Run in the worker thread.
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36 | */
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37 | public class DownloadOsmTask implements DownloadTask {
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38 | private static final Logger logger = Logger.getLogger(DownloadOsmTask.class.getName());
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39 |
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40 | private static Bounds currentBounds;
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41 | private Future<Task> task = null;
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42 | private DataSet downloadedData;
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43 |
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44 | private class Task extends PleaseWaitRunnable {
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45 | private OsmServerReader reader;
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46 | private DataSet dataSet;
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47 | private boolean newLayer;
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48 | private boolean cancelled;
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49 | private Exception lastException;
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50 |
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51 | public Task(boolean newLayer, OsmServerReader reader, ProgressMonitor progressMonitor) {
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52 | super(tr("Downloading data"), progressMonitor, false);
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53 | this.reader = reader;
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54 | this.newLayer = newLayer;
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55 | }
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56 |
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57 | @Override public void realRun() throws IOException, SAXException, OsmTransferException {
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58 | try {
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59 | dataSet = reader.parseOsm(progressMonitor.createSubTaskMonitor(ProgressMonitor.ALL_TICKS, false));
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60 | } catch(Exception e) {
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61 | if (cancelled) {
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62 | logger.warning(tr("Ignoring exception because download has been cancelled. Exception was: {0}" + e.toString()));
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63 | return;
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64 | }
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65 | if (e instanceof OsmTransferException) {
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66 | lastException = e;
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67 | } else {
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68 | lastException = new OsmTransferException(e);
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69 | }
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70 | }
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71 | }
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72 |
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73 | protected OsmDataLayer getEditLayer() {
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74 | if (Main.map == null) return null;
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75 | if (Main.map.mapView == null) return null;
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76 | return Main.map.mapView.getEditLayer();
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77 | }
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78 |
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79 | protected int getNumDataLayers() {
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80 | int count = 0;
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81 | if (Main.map == null) return 0;
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82 | if (Main.map.mapView == null) return 0;
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83 | Collection<Layer> layers = Main.map.mapView.getAllLayers();
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84 | for (Layer layer : layers) {
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85 | if (layer instanceof OsmDataLayer) {
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86 | count++;
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87 | }
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88 | }
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89 | return count;
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90 | }
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91 |
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92 | protected OsmDataLayer getFirstDataLayer() {
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93 | if (Main.map == null) return null;
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94 | if (Main.map.mapView == null) return null;
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95 | Collection<Layer> layers = Main.map.mapView.getAllLayers();
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96 | for (Layer layer : layers) {
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97 | if (layer instanceof OsmDataLayer)
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98 | return (OsmDataLayer) layer;
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99 | }
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100 | return null;
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101 | }
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102 |
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103 | @Override protected void finish() {
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104 | if (cancelled)
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105 | return;
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106 | if (lastException != null) {
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107 | ExceptionDialogUtil.explainException(lastException);
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108 | return;
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109 | }
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110 | if (dataSet == null)
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111 | return; // user canceled download or error occurred
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112 | if (dataSet.allPrimitives().isEmpty()) {
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113 | progressMonitor.setErrorMessage(tr("No data imported."));
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114 | // need to synthesize a download bounds lest the visual indication of downloaded
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115 | // area doesn't work
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116 | dataSet.dataSources.add(new DataSource(currentBounds, "OpenStreetMap server"));
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117 | }
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118 | rememberDownloadedData(dataSet);
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119 | int numDataLayers = getNumDataLayers();
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120 | if (newLayer || numDataLayers == 0 || (numDataLayers > 1 && getEditLayer() == null)) {
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121 | // the user explicitly wants a new layer, we don't have any layer at all
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122 | // or it is not clear which layer to merge to
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123 | //
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124 | OsmDataLayer layer = new OsmDataLayer(dataSet, OsmDataLayer.createNewName(), null);
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125 | Main.main.addLayer(layer);
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126 | } else {
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127 | OsmDataLayer target;
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128 | target = getEditLayer();
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129 | if (target == null) {
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130 | target = getFirstDataLayer();
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131 | }
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132 | target.mergeFrom(dataSet);
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133 | }
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134 | }
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135 |
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136 | @Override protected void cancel() {
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137 | if (reader != null) {
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138 | reader.cancel();
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139 | }
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140 | }
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141 | }
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142 | private JCheckBox checkBox = new JCheckBox(tr("OpenStreetMap data"), true);
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143 |
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144 | private void rememberDownloadedData(DataSet ds) {
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145 | this.downloadedData = ds;
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146 | }
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147 |
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148 | public DataSet getDownloadedData() {
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149 | return downloadedData;
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150 | }
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151 |
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152 | public void download(DownloadAction action, double minlat, double minlon,
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153 | double maxlat, double maxlon, ProgressMonitor progressMonitor) {
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154 | // Swap min and max if user has specified them the wrong way round
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155 | // (easy to do if you are crossing 0, for example)
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156 | // FIXME should perhaps be done in download dialog?
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157 | if (minlat > maxlat) {
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158 | double t = minlat; minlat = maxlat; maxlat = t;
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159 | }
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160 | if (minlon > maxlon) {
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161 | double t = minlon; minlon = maxlon; maxlon = t;
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162 | }
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163 |
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164 | boolean newLayer = action != null
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165 | && (action.dialog == null || action.dialog.newLayer.isSelected());
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166 |
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167 | Task t = new Task(newLayer,
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168 | new BoundingBoxDownloader(minlat, minlon, maxlat, maxlon), progressMonitor);
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169 | currentBounds = new Bounds(new LatLon(minlat, minlon), new LatLon(maxlat, maxlon));
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170 | // We need submit instead of execute so we can wait for it to finish and get the error
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171 | // message if necessary. If no one calls getErrorMessage() it just behaves like execute.
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172 | task = Main.worker.submit(t, t);
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173 | }
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174 |
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175 | /**
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176 | * Loads a given URL from the OSM Server
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177 | * @param True if the data should be saved to a new layer
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178 | * @param The URL as String
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179 | */
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180 | public void loadUrl(boolean new_layer, String url) {
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181 | Task t = new Task(new_layer,
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182 | new OsmServerLocationReader(url),
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183 | NullProgressMonitor.INSTANCE);
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184 | task = Main.worker.submit(t, t);
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185 | }
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186 |
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187 | public JCheckBox getCheckBox() {
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188 | return checkBox;
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189 | }
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190 |
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191 | public String getPreferencesSuffix() {
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192 | return "osm";
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193 | }
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194 |
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195 | /*
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196 | * (non-Javadoc)
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197 | * @see org.openstreetmap.josm.gui.download.DownloadDialog.DownloadTask#getErrorMessage()
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198 | */
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199 | public String getErrorMessage() {
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200 | if(task == null)
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201 | return "";
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202 |
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203 | try {
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204 | Task t = task.get();
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205 | return t.getProgressMonitor().getErrorMessage() == null
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206 | ? ""
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207 | : t.getProgressMonitor().getErrorMessage();
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208 | } catch (Exception e) {
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209 | return "";
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210 | }
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211 | }
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212 | }
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