1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.dialogs.relation;
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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.lang.reflect.InvocationTargetException;
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8 | import java.util.Collection;
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9 |
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10 | import javax.swing.SwingUtilities;
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11 |
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12 | import org.openstreetmap.josm.data.osm.DataSet;
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13 | import org.openstreetmap.josm.data.osm.DataSetMerger;
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14 | import org.openstreetmap.josm.data.osm.DefaultNameFormatter;
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15 | import org.openstreetmap.josm.data.osm.Relation;
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16 | import org.openstreetmap.josm.gui.ExceptionDialogUtil;
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17 | import org.openstreetmap.josm.gui.MainApplication;
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18 | import org.openstreetmap.josm.gui.PleaseWaitRunnable;
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19 | import org.openstreetmap.josm.gui.layer.OsmDataLayer;
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20 | import org.openstreetmap.josm.io.OsmServerObjectReader;
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21 | import org.openstreetmap.josm.io.OsmTransferException;
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22 | import org.openstreetmap.josm.tools.CheckParameterUtil;
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23 | import org.openstreetmap.josm.tools.Logging;
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24 | import org.xml.sax.SAXException;
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25 |
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26 | /**
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27 | * The asynchronous task for fully downloading a collection of relations. Does a full download
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28 | * for each relations and merges the relation into an {@link OsmDataLayer}
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29 | * @since 2563
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30 | */
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31 | public class DownloadRelationTask extends PleaseWaitRunnable {
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32 | private boolean canceled;
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33 | private Exception lastException;
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34 | private final Collection<Relation> relations;
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35 | private final OsmDataLayer layer;
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36 | private OsmServerObjectReader objectReader;
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37 |
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38 | /**
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39 | * Creates the download task
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40 | *
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41 | * @param relations a collection of relations. Must not be null.
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42 | * @param layer the layer which data is to be merged into
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43 | * @throws IllegalArgumentException if relations is null
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44 | * @throws IllegalArgumentException if layer is null
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45 | */
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46 | public DownloadRelationTask(Collection<Relation> relations, OsmDataLayer layer) {
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47 | super(tr("Download relations"), false /* don't ignore exception */);
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48 | CheckParameterUtil.ensureParameterNotNull(relations, "relations");
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49 | CheckParameterUtil.ensureParameterNotNull(layer, "layer");
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50 | this.relations = relations;
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51 | this.layer = layer;
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52 | if (!layer.isDownloadable()) {
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53 | throw new IllegalArgumentException("Non-downloadable layer: " + layer);
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54 | }
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55 | }
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56 |
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57 | @Override
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58 | protected void cancel() {
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59 | canceled = true;
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60 | synchronized (this) {
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61 | if (objectReader != null) {
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62 | objectReader.cancel();
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63 | }
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64 | }
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65 | }
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66 |
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67 | @Override
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68 | protected void finish() {
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69 | if (canceled)
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70 | return;
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71 | if (lastException != null) {
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72 | ExceptionDialogUtil.explainException(lastException);
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73 | }
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74 | }
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75 |
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76 | @Override
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77 | protected void realRun() throws SAXException, IOException, OsmTransferException {
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78 | try {
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79 | final DataSet allDownloads = new DataSet();
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80 | int i = 0;
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81 | getProgressMonitor().setTicksCount(relations.size());
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82 | for (Relation relation: relations) {
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83 | i++;
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84 | getProgressMonitor().setCustomText(tr("({0}/{1}): Downloading relation ''{2}''...", i, relations.size(),
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85 | relation.getDisplayName(DefaultNameFormatter.getInstance())));
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86 | synchronized (this) {
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87 | if (canceled) return;
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88 | objectReader = new OsmServerObjectReader(relation.getPrimitiveId(), true /* full download */);
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89 | }
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90 | DataSet dataSet = objectReader.parseOsm(
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91 | getProgressMonitor().createSubTaskMonitor(0, false)
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92 | );
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93 | if (dataSet == null)
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94 | return;
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95 | synchronized (this) {
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96 | if (canceled) return;
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97 | objectReader = null;
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98 | }
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99 | DataSetMerger merger = new DataSetMerger(allDownloads, dataSet);
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100 | merger.merge();
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101 | getProgressMonitor().worked(1);
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102 | }
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103 |
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104 | SwingUtilities.invokeAndWait(() -> {
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105 | layer.mergeFrom(allDownloads);
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106 | layer.onPostDownloadFromServer();
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107 | MainApplication.getMap().repaint();
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108 | });
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109 | } catch (OsmTransferException | InvocationTargetException | InterruptedException e) {
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110 | if (canceled) {
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111 | Logging.warn(tr("Ignoring exception because task was canceled. Exception: {0}", e.toString()));
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112 | return;
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113 | }
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114 | lastException = e;
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115 | }
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116 | }
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117 | }
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