1 | // License: GPL. For details, see LICENSE file.
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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.net.MalformedURLException;
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8 | import java.net.URL;
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9 | import java.util.ArrayList;
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10 | import java.util.Arrays;
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11 | import java.util.Collection;
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12 | import java.util.Collections;
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13 | import java.util.HashSet;
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14 | import java.util.Objects;
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15 | import java.util.Optional;
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16 | import java.util.Set;
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17 | import java.util.concurrent.Future;
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18 | import java.util.regex.Matcher;
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19 | import java.util.regex.Pattern;
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20 | import java.util.stream.Stream;
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21 |
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22 | import org.openstreetmap.josm.data.Bounds;
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23 | import org.openstreetmap.josm.data.DataSource;
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24 | import org.openstreetmap.josm.data.ProjectionBounds;
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25 | import org.openstreetmap.josm.data.ViewportData;
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26 | import org.openstreetmap.josm.data.coor.LatLon;
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27 | import org.openstreetmap.josm.data.osm.DataSet;
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28 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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29 | import org.openstreetmap.josm.data.osm.Relation;
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30 | import org.openstreetmap.josm.data.osm.Way;
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31 | import org.openstreetmap.josm.data.osm.visitor.BoundingXYVisitor;
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32 | import org.openstreetmap.josm.gui.MainApplication;
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33 | import org.openstreetmap.josm.gui.MapFrame;
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34 | import org.openstreetmap.josm.gui.PleaseWaitRunnable;
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35 | import org.openstreetmap.josm.gui.io.UpdatePrimitivesTask;
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36 | import org.openstreetmap.josm.gui.layer.OsmDataLayer;
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37 | import org.openstreetmap.josm.gui.progress.NullProgressMonitor;
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38 | import org.openstreetmap.josm.gui.progress.ProgressMonitor;
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39 | import org.openstreetmap.josm.io.BoundingBoxDownloader;
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40 | import org.openstreetmap.josm.io.OsmServerLocationReader;
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41 | import org.openstreetmap.josm.io.OsmServerLocationReader.OsmUrlPattern;
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42 | import org.openstreetmap.josm.io.OsmServerReader;
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43 | import org.openstreetmap.josm.io.OsmTransferCanceledException;
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44 | import org.openstreetmap.josm.io.OsmTransferException;
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45 | import org.openstreetmap.josm.io.OverpassDownloadReader;
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46 | import org.openstreetmap.josm.tools.Logging;
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47 | import org.openstreetmap.josm.tools.Utils;
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48 | import org.xml.sax.SAXException;
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49 |
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50 | /**
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51 | * Open the download dialog and download the data.
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52 | * Run in the worker thread.
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53 | */
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54 | public class DownloadOsmTask extends AbstractDownloadTask<DataSet> {
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55 |
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56 | protected Bounds currentBounds;
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57 | protected DownloadTask downloadTask;
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58 |
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59 | protected String newLayerName;
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60 |
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61 | /** This allows subclasses to ignore this warning */
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62 | protected boolean warnAboutEmptyArea = true;
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63 |
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64 | protected static final String OVERPASS_INTERPRETER_DATA = "interpreter?data=";
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65 |
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66 | @Override
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67 | public String[] getPatterns() {
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68 | if (this.getClass() == DownloadOsmTask.class) {
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69 | return Arrays.stream(OsmUrlPattern.values()).map(OsmUrlPattern::pattern).toArray(String[]::new);
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70 | } else {
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71 | return super.getPatterns();
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72 | }
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73 | }
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74 |
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75 | @Override
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76 | public String getTitle() {
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77 | if (this.getClass() == DownloadOsmTask.class) {
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78 | return tr("Download OSM");
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79 | } else {
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80 | return super.getTitle();
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81 | }
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82 | }
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83 |
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84 | @Override
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85 | public Future<?> download(DownloadParams settings, Bounds downloadArea, ProgressMonitor progressMonitor) {
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86 | return download(new BoundingBoxDownloader(downloadArea), settings, downloadArea, progressMonitor);
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87 | }
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88 |
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89 | /**
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90 | * Asynchronously launches the download task for a given bounding box.
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91 | *
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92 | * Set <code>progressMonitor</code> to null, if the task should create, open, and close a progress monitor.
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93 | * Set progressMonitor to {@link NullProgressMonitor#INSTANCE} if progress information is to
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94 | * be discarded.
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95 | *
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96 | * You can wait for the asynchronous download task to finish by synchronizing on the returned
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97 | * {@link Future}, but make sure not to freeze up JOSM. Example:
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98 | * <pre>
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99 | * Future<?> future = task.download(...);
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100 | * // DON'T run this on the Swing EDT or JOSM will freeze
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101 | * future.get(); // waits for the dowload task to complete
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102 | * </pre>
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103 | *
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104 | * The following example uses a pattern which is better suited if a task is launched from
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105 | * the Swing EDT:
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106 | * <pre>
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107 | * final Future<?> future = task.download(...);
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108 | * Runnable runAfterTask = new Runnable() {
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109 | * public void run() {
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110 | * // this is not strictly necessary because of the type of executor service
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111 | * // Main.worker is initialized with, but it doesn't harm either
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112 | * //
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113 | * future.get(); // wait for the download task to complete
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114 | * doSomethingAfterTheTaskCompleted();
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115 | * }
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116 | * }
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117 | * MainApplication.worker.submit(runAfterTask);
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118 | * </pre>
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119 | * @param reader the reader used to parse OSM data (see {@link OsmServerReader#parseOsm})
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120 | * @param settings download settings
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121 | * @param downloadArea the area to download
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122 | * @param progressMonitor the progressMonitor
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123 | * @return the future representing the asynchronous task
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124 | * @since 13927
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125 | */
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126 | public Future<?> download(OsmServerReader reader, DownloadParams settings, Bounds downloadArea, ProgressMonitor progressMonitor) {
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127 | return download(new DownloadTask(settings, reader, progressMonitor, zoomAfterDownload), downloadArea);
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128 | }
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129 |
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130 | protected Future<?> download(DownloadTask downloadTask, Bounds downloadArea) {
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131 | this.downloadTask = downloadTask;
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132 | this.currentBounds = new Bounds(downloadArea);
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133 | // We need submit instead of execute so we can wait for it to finish and get the error
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134 | // message if necessary. If no one calls getErrorMessage() it just behaves like execute.
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135 | return MainApplication.worker.submit(downloadTask);
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136 | }
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137 |
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138 | /**
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139 | * This allows subclasses to perform operations on the URL before {@link #loadUrl} is performed.
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140 | * @param url the original URL
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141 | * @return the modified URL
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142 | */
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143 | protected String modifyUrlBeforeLoad(String url) {
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144 | return url;
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145 | }
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146 |
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147 | /**
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148 | * Loads a given URL from the OSM Server
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149 | * @param settings download settings
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150 | * @param url The URL as String
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151 | */
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152 | @Override
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153 | public Future<?> loadUrl(DownloadParams settings, String url, ProgressMonitor progressMonitor) {
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154 | String newUrl = modifyUrlBeforeLoad(url);
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155 | downloadTask = new DownloadTask(settings, getOsmServerReader(newUrl), progressMonitor);
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156 | currentBounds = null;
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157 | // Extract .osm filename from URL to set the new layer name
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158 | extractOsmFilename(settings, "https?://.*/(.*\\.osm)", newUrl);
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159 | return MainApplication.worker.submit(downloadTask);
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160 | }
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161 |
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162 | protected OsmServerReader getOsmServerReader(String url) {
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163 | try {
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164 | String host = new URL(url).getHost();
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165 | for (String knownOverpassServer : OverpassDownloadReader.OVERPASS_SERVER_HISTORY.get()) {
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166 | if (host.equals(new URL(knownOverpassServer).getHost())) {
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167 | int index = url.indexOf(OVERPASS_INTERPRETER_DATA);
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168 | if (index > 0) {
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169 | return new OverpassDownloadReader(new Bounds(LatLon.ZERO), knownOverpassServer,
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170 | Utils.decodeUrl(url.substring(index + OVERPASS_INTERPRETER_DATA.length())));
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171 | }
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172 | }
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173 | }
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174 | } catch (MalformedURLException e) {
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175 | Logging.error(e);
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176 | }
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177 | return new OsmServerLocationReader(url);
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178 | }
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179 |
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180 | protected final void extractOsmFilename(DownloadParams settings, String pattern, String url) {
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181 | newLayerName = settings.getLayerName();
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182 | if (newLayerName == null || newLayerName.isEmpty()) {
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183 | Matcher matcher = Pattern.compile(pattern).matcher(url);
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184 | newLayerName = matcher.matches() ? matcher.group(1) : null;
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185 | }
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186 | }
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187 |
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188 | @Override
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189 | public void cancel() {
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190 | if (downloadTask != null) {
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191 | downloadTask.cancel();
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192 | }
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193 | }
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194 |
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195 | @Override
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196 | public boolean isSafeForRemotecontrolRequests() {
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197 | return true;
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198 | }
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199 |
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200 | @Override
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201 | public ProjectionBounds getDownloadProjectionBounds() {
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202 | return downloadTask != null ? downloadTask.computeBbox(currentBounds) : null;
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203 | }
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204 |
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205 | /**
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206 | * Superclass of internal download task.
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207 | * @since 7636
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208 | */
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209 | public abstract static class AbstractInternalTask extends PleaseWaitRunnable {
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210 |
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211 | protected final DownloadParams settings;
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212 | protected final boolean zoomAfterDownload;
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213 | protected DataSet dataSet;
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214 |
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215 | /**
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216 | * Constructs a new {@code AbstractInternalTask}.
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217 | * @param settings download settings
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218 | * @param title message for the user
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219 | * @param ignoreException If true, exception will be propagated to calling code. If false then
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220 | * exception will be thrown directly in EDT. When this runnable is executed using executor framework
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221 | * then use false unless you read result of task (because exception will get lost if you don't)
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222 | * @param zoomAfterDownload If true, the map view will zoom to download area after download
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223 | */
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224 | public AbstractInternalTask(DownloadParams settings, String title, boolean ignoreException, boolean zoomAfterDownload) {
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225 | super(title, ignoreException);
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226 | this.settings = Objects.requireNonNull(settings);
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227 | this.zoomAfterDownload = zoomAfterDownload;
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228 | }
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229 |
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230 | /**
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231 | * Constructs a new {@code AbstractInternalTask}.
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232 | * @param settings download settings
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233 | * @param title message for the user
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234 | * @param progressMonitor progress monitor
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235 | * @param ignoreException If true, exception will be propagated to calling code. If false then
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236 | * exception will be thrown directly in EDT. When this runnable is executed using executor framework
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237 | * then use false unless you read result of task (because exception will get lost if you don't)
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238 | * @param zoomAfterDownload If true, the map view will zoom to download area after download
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239 | */
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240 | public AbstractInternalTask(DownloadParams settings, String title, ProgressMonitor progressMonitor, boolean ignoreException,
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241 | boolean zoomAfterDownload) {
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242 | super(title, progressMonitor, ignoreException);
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243 | this.settings = Objects.requireNonNull(settings);
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244 | this.zoomAfterDownload = zoomAfterDownload;
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245 | }
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246 |
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247 | protected OsmDataLayer getEditLayer() {
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248 | return MainApplication.getLayerManager().getEditLayer();
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249 | }
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250 |
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251 | private static Stream<OsmDataLayer> getModifiableDataLayers() {
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252 | return MainApplication.getLayerManager().getLayersOfType(OsmDataLayer.class)
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253 | .stream().filter(OsmDataLayer::isDownloadable);
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254 | }
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255 |
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256 | /**
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257 | * Returns the number of modifiable data layers
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258 | * @return number of modifiable data layers
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259 | * @since 13434
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260 | */
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261 | protected long getNumModifiableDataLayers() {
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262 | return getModifiableDataLayers().count();
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263 | }
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264 |
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265 | /**
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266 | * Returns the first modifiable data layer
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267 | * @return the first modifiable data layer
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268 | * @since 13434
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269 | */
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270 | protected OsmDataLayer getFirstModifiableDataLayer() {
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271 | return getModifiableDataLayers().findFirst().orElse(null);
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272 | }
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273 |
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274 | /**
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275 | * Creates a name for a new layer by utilizing the settings ({@link DownloadParams#getLayerName()}) or
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276 | * {@link OsmDataLayer#createNewName()} if the former option is {@code null}.
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277 | *
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278 | * @return a name for a new layer
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279 | * @since 14347
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280 | */
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281 | protected String generateLayerName() {
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282 | return Optional.ofNullable(settings.getLayerName())
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283 | .filter(layerName -> !Utils.isStripEmpty(layerName))
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284 | .orElse(OsmDataLayer.createNewName());
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285 | }
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286 |
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287 | /**
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288 | * Can be overridden (e.g. by plugins) if a subclass of {@link OsmDataLayer} is needed.
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289 | * If you want to change how the name is determined, consider overriding
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290 | * {@link #generateLayerName()} instead.
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291 | *
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292 | * @param ds the dataset on which the layer is based, must be non-null
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293 | * @param layerName the name of the new layer, must be either non-blank or non-present
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294 | * @return a new instance of {@link OsmDataLayer} constructed with the given arguments
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295 | * @since 14347
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296 | */
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297 | protected OsmDataLayer createNewLayer(final DataSet ds, final Optional<String> layerName) {
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298 | if (layerName.filter(Utils::isStripEmpty).isPresent()) {
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299 | throw new IllegalArgumentException("Blank layer name!");
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300 | }
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301 | return new OsmDataLayer(
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302 | Objects.requireNonNull(ds, "dataset parameter"),
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303 | layerName.orElseGet(this::generateLayerName),
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304 | null
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305 | );
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306 | }
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307 |
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308 | /**
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309 | * Convenience method for {@link #createNewLayer(DataSet, Optional)}, uses the dataset
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310 | * from field {@link #dataSet} and applies the settings from field {@link #settings}.
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311 | *
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312 | * @param layerName an optional layer name, must be non-blank if the [Optional] is present
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313 | * @return a newly constructed layer
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314 | * @since 14347
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315 | */
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316 | protected final OsmDataLayer createNewLayer(final Optional<String> layerName) {
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317 | Optional.ofNullable(settings.getDownloadPolicy())
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318 | .ifPresent(dataSet::setDownloadPolicy);
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319 | Optional.ofNullable(settings.getUploadPolicy())
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320 | .ifPresent(dataSet::setUploadPolicy);
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321 | if (dataSet.isLocked() && !settings.isLocked()) {
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322 | dataSet.unlock();
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323 | } else if (!dataSet.isLocked() && settings.isLocked()) {
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324 | dataSet.lock();
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325 | }
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326 | return createNewLayer(dataSet, layerName);
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327 | }
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328 |
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329 | /**
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330 | * @param layerName the name of the new layer
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331 | * @deprecated Use {@link #createNewLayer(DataSet, Optional)}
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332 | * @return a newly constructed layer
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333 | */
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334 | @Deprecated
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335 | protected OsmDataLayer createNewLayer(final String layerName) {
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336 | return createNewLayer(Optional.ofNullable(layerName).filter(it -> !Utils.isStripEmpty(it)));
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337 | }
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338 |
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339 | /**
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340 | * @deprecated Use {@link #createNewLayer(Optional)}
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341 | * @return a newly constructed layer
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342 | */
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343 | @Deprecated
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344 | protected OsmDataLayer createNewLayer() {
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345 | return createNewLayer(Optional.empty());
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346 | }
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347 |
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348 | protected ProjectionBounds computeBbox(Bounds bounds) {
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349 | BoundingXYVisitor v = new BoundingXYVisitor();
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350 | if (bounds != null) {
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351 | v.visit(bounds);
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352 | } else {
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353 | v.computeBoundingBox(dataSet.getNodes());
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354 | }
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355 | return v.getBounds();
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356 | }
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357 |
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358 | protected OsmDataLayer addNewLayerIfRequired(String newLayerName) {
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359 | long numDataLayers = getNumModifiableDataLayers();
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360 | if (settings.isNewLayer() || numDataLayers == 0 || (numDataLayers > 1 && getEditLayer() == null)) {
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361 | // the user explicitly wants a new layer, we don't have any layer at all
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362 | // or it is not clear which layer to merge to
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363 | final OsmDataLayer layer = createNewLayer(newLayerName);
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364 | MainApplication.getLayerManager().addLayer(layer, zoomAfterDownload);
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365 | return layer;
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366 | }
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367 | return null;
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368 | }
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369 |
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370 | protected void loadData(String newLayerName, Bounds bounds) {
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371 | OsmDataLayer layer = addNewLayerIfRequired(newLayerName);
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372 | if (layer == null) {
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373 | layer = getEditLayer();
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374 | if (layer == null || !layer.isDownloadable()) {
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375 | layer = getFirstModifiableDataLayer();
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376 | }
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377 | Collection<OsmPrimitive> primitivesToUpdate = searchPrimitivesToUpdate(bounds, layer.getDataSet());
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378 | layer.mergeFrom(dataSet);
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379 | MapFrame map = MainApplication.getMap();
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380 | if (map != null && zoomAfterDownload && bounds != null) {
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381 | map.mapView.zoomTo(new ViewportData(computeBbox(bounds)));
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382 | }
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383 | if (!primitivesToUpdate.isEmpty()) {
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384 | MainApplication.worker.submit(new UpdatePrimitivesTask(layer, primitivesToUpdate));
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385 | }
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386 | layer.onPostDownloadFromServer();
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387 | }
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388 | }
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389 |
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390 | /**
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391 | * Look for primitives deleted on server (thus absent from downloaded data)
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392 | * but still present in existing data layer
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393 | * @param bounds download bounds
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394 | * @param ds existing data set
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395 | * @return the primitives to update
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396 | */
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397 | private Collection<OsmPrimitive> searchPrimitivesToUpdate(Bounds bounds, DataSet ds) {
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398 | if (bounds == null)
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399 | return Collections.emptySet();
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400 | Collection<OsmPrimitive> col = new ArrayList<>();
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401 | ds.searchNodes(bounds.toBBox()).stream().filter(n -> !n.isNew() && !dataSet.containsNode(n)).forEachOrdered(col::add);
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402 | if (!col.isEmpty()) {
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403 | Set<Way> ways = new HashSet<>();
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404 | Set<Relation> rels = new HashSet<>();
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405 | for (OsmPrimitive n : col) {
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406 | for (OsmPrimitive ref : n.getReferrers()) {
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407 | if (ref.isNew()) {
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408 | continue;
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409 | } else if (ref instanceof Way) {
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410 | ways.add((Way) ref);
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411 | } else if (ref instanceof Relation) {
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412 | rels.add((Relation) ref);
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413 | }
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414 | }
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415 | }
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416 | ways.stream().filter(w -> !dataSet.containsWay(w)).forEachOrdered(col::add);
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417 | rels.stream().filter(r -> !dataSet.containsRelation(r)).forEachOrdered(col::add);
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418 | }
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419 | return col;
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420 | }
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421 | }
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422 |
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423 | protected class DownloadTask extends AbstractInternalTask {
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424 | protected final OsmServerReader reader;
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425 |
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426 | /**
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427 | * Constructs a new {@code DownloadTask}.
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428 | * @param settings download settings
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429 | * @param reader OSM data reader
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430 | * @param progressMonitor progress monitor
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431 | * @since 13927
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432 | */
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433 | public DownloadTask(DownloadParams settings, OsmServerReader reader, ProgressMonitor progressMonitor) {
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434 | this(settings, reader, progressMonitor, true);
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435 | }
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436 |
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437 | /**
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438 | * Constructs a new {@code DownloadTask}.
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439 | * @param settings download settings
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440 | * @param reader OSM data reader
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441 | * @param progressMonitor progress monitor
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442 | * @param zoomAfterDownload If true, the map view will zoom to download area after download
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443 | * @since 13927
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444 | */
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445 | public DownloadTask(DownloadParams settings, OsmServerReader reader, ProgressMonitor progressMonitor, boolean zoomAfterDownload) {
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446 | super(settings, tr("Downloading data"), progressMonitor, false, zoomAfterDownload);
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447 | this.reader = reader;
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448 | }
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449 |
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450 | protected DataSet parseDataSet() throws OsmTransferException {
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451 | return reader.parseOsm(progressMonitor.createSubTaskMonitor(ProgressMonitor.ALL_TICKS, false));
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452 | }
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453 |
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454 | @Override
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455 | public void realRun() throws IOException, SAXException, OsmTransferException {
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456 | try {
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457 | if (isCanceled())
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458 | return;
|
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459 | dataSet = parseDataSet();
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460 | } catch (OsmTransferException e) {
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461 | if (isCanceled()) {
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462 | Logging.info(tr("Ignoring exception because download has been canceled. Exception was: {0}", e.toString()));
|
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463 | return;
|
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464 | }
|
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465 | if (e instanceof OsmTransferCanceledException) {
|
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466 | setCanceled(true);
|
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467 | return;
|
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468 | } else {
|
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469 | rememberException(e);
|
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470 | }
|
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471 | DownloadOsmTask.this.setFailed(true);
|
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472 | }
|
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473 | }
|
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474 |
|
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475 | @Override
|
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476 | protected void finish() {
|
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477 | if (isFailed() || isCanceled())
|
---|
478 | return;
|
---|
479 | if (dataSet == null)
|
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480 | return; // user canceled download or error occurred
|
---|
481 | if (dataSet.allPrimitives().isEmpty()) {
|
---|
482 | if (warnAboutEmptyArea) {
|
---|
483 | rememberErrorMessage(tr("No data found in this area."));
|
---|
484 | }
|
---|
485 | String remark = dataSet.getRemark();
|
---|
486 | if (remark != null && !remark.isEmpty()) {
|
---|
487 | rememberErrorMessage(remark);
|
---|
488 | }
|
---|
489 | // need to synthesize a download bounds lest the visual indication of downloaded area doesn't work
|
---|
490 | dataSet.addDataSource(new DataSource(currentBounds != null ? currentBounds :
|
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491 | new Bounds(LatLon.ZERO), "OpenStreetMap server"));
|
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492 | }
|
---|
493 |
|
---|
494 | rememberDownloadedData(dataSet);
|
---|
495 | loadData(newLayerName, currentBounds);
|
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496 | }
|
---|
497 |
|
---|
498 | @Override
|
---|
499 | protected void cancel() {
|
---|
500 | setCanceled(true);
|
---|
501 | if (reader != null) {
|
---|
502 | reader.cancel();
|
---|
503 | }
|
---|
504 | }
|
---|
505 | }
|
---|
506 |
|
---|
507 | @Override
|
---|
508 | public String getConfirmationMessage(URL url) {
|
---|
509 | if (url != null) {
|
---|
510 | String urlString = url.toExternalForm();
|
---|
511 | if (urlString.matches(OsmUrlPattern.OSM_API_URL.pattern())) {
|
---|
512 | // TODO: proper i18n after stabilization
|
---|
513 | Collection<String> items = new ArrayList<>();
|
---|
514 | items.add(tr("OSM Server URL:") + ' ' + url.getHost());
|
---|
515 | items.add(tr("Command")+": "+url.getPath());
|
---|
516 | if (url.getQuery() != null) {
|
---|
517 | items.add(tr("Request details: {0}", url.getQuery().replaceAll(",\\s*", ", ")));
|
---|
518 | }
|
---|
519 | return Utils.joinAsHtmlUnorderedList(items);
|
---|
520 | }
|
---|
521 | // TODO: other APIs
|
---|
522 | }
|
---|
523 | return null;
|
---|
524 | }
|
---|
525 | }
|
---|