1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.io;
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3 |
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4 | import static org.openstreetmap.josm.tools.CheckParameterUtil.ensureParameterNotNull;
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5 | import static org.openstreetmap.josm.tools.I18n.tr;
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6 |
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7 | import java.io.IOException;
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8 | import java.util.Collection;
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9 | import java.util.Collections;
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10 |
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11 | import org.openstreetmap.josm.data.osm.DataSet;
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12 | import org.openstreetmap.josm.data.osm.DataSetMerger;
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13 | import org.openstreetmap.josm.data.osm.Node;
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14 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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15 | import org.openstreetmap.josm.data.osm.OsmPrimitiveType;
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16 | import org.openstreetmap.josm.data.osm.Relation;
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17 | import org.openstreetmap.josm.data.osm.Way;
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18 | import org.openstreetmap.josm.gui.ExceptionDialogUtil;
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19 | import org.openstreetmap.josm.gui.PleaseWaitRunnable;
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20 | import org.openstreetmap.josm.gui.layer.OsmDataLayer;
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21 | import org.openstreetmap.josm.gui.progress.ProgressMonitor;
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22 | import org.openstreetmap.josm.gui.util.GuiHelper;
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23 | import org.openstreetmap.josm.io.MultiFetchServerObjectReader;
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24 | import org.openstreetmap.josm.io.OsmServerObjectReader;
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25 | import org.openstreetmap.josm.io.OsmTransferException;
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26 | import org.xml.sax.SAXException;
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27 |
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28 | /**
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29 | * The asynchronous task for updating a collection of objects using multi fetch.
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30 | *
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31 | */
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32 | public class UpdatePrimitivesTask extends PleaseWaitRunnable {
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33 | private DataSet ds;
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34 | private boolean canceled;
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35 | private Exception lastException;
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36 | private final Collection<? extends OsmPrimitive> toUpdate;
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37 | private final OsmDataLayer layer;
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38 | private MultiFetchServerObjectReader multiObjectReader;
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39 | private OsmServerObjectReader objectReader;
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40 |
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41 | /**
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42 | * Creates the task
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43 | *
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44 | * @param layer the layer in which primitives are updated. Must not be null.
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45 | * @param toUpdate a collection of primitives to update from the server. Set to
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46 | * the empty collection if null.
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47 | * @throws IllegalArgumentException if layer is null.
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48 | */
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49 | public UpdatePrimitivesTask(OsmDataLayer layer, Collection<? extends OsmPrimitive> toUpdate) {
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50 | super(tr("Update objects"), false /* don't ignore exception */);
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51 | ensureParameterNotNull(layer, "layer");
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52 | if (toUpdate == null) {
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53 | toUpdate = Collections.emptyList();
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54 | }
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55 | this.layer = layer;
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56 | this.toUpdate = toUpdate;
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57 | }
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58 |
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59 | @Override
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60 | protected void cancel() {
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61 | canceled = true;
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62 | synchronized (this) {
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63 | if (multiObjectReader != null) {
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64 | multiObjectReader.cancel();
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65 | }
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66 | if (objectReader != null) {
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67 | objectReader.cancel();
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68 | }
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69 | }
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70 | }
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71 |
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72 | @Override
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73 | protected void finish() {
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74 | if (canceled)
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75 | return;
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76 | if (lastException != null) {
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77 | ExceptionDialogUtil.explainException(lastException);
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78 | return;
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79 | }
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80 | GuiHelper.runInEDTAndWait(new Runnable() {
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81 | @Override
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82 | public void run() {
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83 | layer.mergeFrom(ds);
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84 | layer.onPostDownloadFromServer();
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85 | }
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86 | });
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87 | }
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88 |
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89 | protected void initMultiFetchReaderWithNodes(MultiFetchServerObjectReader reader) {
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90 | getProgressMonitor().indeterminateSubTask(tr("Initializing nodes to update ..."));
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91 | for (OsmPrimitive primitive : toUpdate) {
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92 | if (primitive instanceof Node && !primitive.isNew()) {
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93 | reader.append(primitive);
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94 | }
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95 | }
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96 | }
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97 |
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98 | protected void initMultiFetchReaderWithWays(MultiFetchServerObjectReader reader) {
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99 | getProgressMonitor().indeterminateSubTask(tr("Initializing ways to update ..."));
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100 | for (OsmPrimitive primitive : toUpdate) {
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101 | if (primitive instanceof Way && !primitive.isNew()) {
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102 | // this also adds way nodes
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103 | reader.append(primitive);
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104 | }
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105 | }
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106 | }
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107 |
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108 | protected void initMultiFetchReaderWithRelations(MultiFetchServerObjectReader reader) {
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109 | getProgressMonitor().indeterminateSubTask(tr("Initializing relations to update ..."));
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110 | for (OsmPrimitive primitive : toUpdate) {
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111 | if (primitive instanceof Relation && !primitive.isNew()) {
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112 | // this also adds relation members
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113 | reader.append(primitive);
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114 | }
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115 | }
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116 | }
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117 |
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118 | @Override
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119 | protected void realRun() throws SAXException, IOException, OsmTransferException {
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120 | this.ds = new DataSet();
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121 | DataSet theirDataSet;
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122 | try {
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123 | synchronized (this) {
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124 | if (canceled) return;
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125 | multiObjectReader = MultiFetchServerObjectReader.create();
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126 | }
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127 | initMultiFetchReaderWithNodes(multiObjectReader);
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128 | initMultiFetchReaderWithWays(multiObjectReader);
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129 | initMultiFetchReaderWithRelations(multiObjectReader);
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130 | theirDataSet = multiObjectReader.parseOsm(progressMonitor.createSubTaskMonitor(ProgressMonitor.ALL_TICKS, false));
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131 | synchronized (this) {
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132 | multiObjectReader = null;
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133 | }
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134 | DataSetMerger merger = new DataSetMerger(ds, theirDataSet);
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135 | merger.merge();
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136 | // a way loaded with MultiFetch may have incomplete nodes because at least one of its
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137 | // nodes isn't present in the local data set. We therefore fully load all
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138 | // ways with incomplete nodes.
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139 | //
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140 | for (Way w : ds.getWays()) {
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141 | if (canceled) return;
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142 | if (w.hasIncompleteNodes()) {
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143 | synchronized (this) {
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144 | if (canceled) return;
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145 | objectReader = new OsmServerObjectReader(w.getId(), OsmPrimitiveType.WAY, true /* full */);
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146 | }
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147 | theirDataSet = objectReader.parseOsm(progressMonitor.createSubTaskMonitor(ProgressMonitor.ALL_TICKS, false));
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148 | synchronized (this) {
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149 | objectReader = null;
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150 | }
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151 | merger = new DataSetMerger(ds, theirDataSet);
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152 | merger.merge();
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153 | }
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154 | }
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155 | } catch (Exception e) {
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156 | if (canceled)
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157 | return;
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158 | lastException = e;
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159 | }
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160 | }
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161 | }
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