1 | // License: GPL. Copyright 2007 by Immanuel Scholz and others
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2 | package org.openstreetmap.josm.io;
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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.io.InputStream;
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8 |
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9 | import org.openstreetmap.josm.data.Bounds;
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10 | import org.openstreetmap.josm.data.gpx.GpxData;
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11 | import org.openstreetmap.josm.data.osm.DataSet;
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12 | import org.openstreetmap.josm.gui.progress.ProgressMonitor;
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13 | import org.xml.sax.SAXException;
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14 |
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15 | public class BoundingBoxDownloader extends OsmServerReader {
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16 |
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17 | /**
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18 | * The boundings of the desired map data.
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19 | */
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20 | protected final double lat1;
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21 | protected final double lon1;
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22 | protected final double lat2;
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23 | protected final double lon2;
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24 | protected final boolean crosses180th;
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25 |
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26 | public BoundingBoxDownloader(Bounds downloadArea) {
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27 | this.lat1 = downloadArea.getMin().lat();
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28 | this.lon1 = downloadArea.getMin().lon();
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29 | this.lat2 = downloadArea.getMax().lat();
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30 | this.lon2 = downloadArea.getMax().lon();
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31 | this.crosses180th = downloadArea.crosses180thMeridian();
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32 | }
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33 |
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34 | private GpxData downloadRawGps(String url, ProgressMonitor progressMonitor) throws IOException, OsmTransferException, SAXException {
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35 | boolean done = false;
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36 | GpxData result = null;
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37 | for (int i = 0;!done;++i) {
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38 | progressMonitor.subTask(tr("Downloading points {0} to {1}...", i * 5000, ((i + 1) * 5000)));
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39 | InputStream in = getInputStream(url+i, progressMonitor.createSubTaskMonitor(1, true));
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40 | if (in == null) {
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41 | break;
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42 | }
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43 | progressMonitor.setTicks(0);
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44 | GpxReader reader = new GpxReader(in);
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45 | gpxParsedProperly = reader.parse(false);
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46 | GpxData currentGpx = reader.getGpxData();
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47 | if (result == null) {
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48 | result = currentGpx;
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49 | } else if (currentGpx.hasTrackPoints()) {
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50 | result.mergeFrom(currentGpx);
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51 | } else{
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52 | done = true;
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53 | }
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54 | in.close();
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55 | activeConnection = null;
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56 | }
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57 | result.fromServer = true;
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58 | return result;
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59 | }
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60 |
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61 | /**
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62 | * Retrieve raw gps waypoints from the server API.
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63 | * @return A list of all primitives retrieved. Currently, the list of lists
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64 | * contain only one list, since the server cannot distinguish between
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65 | * ways.
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66 | */
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67 | @Override
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68 | public GpxData parseRawGps(ProgressMonitor progressMonitor) throws OsmTransferException {
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69 | progressMonitor.beginTask("", 1);
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70 | try {
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71 | progressMonitor.indeterminateSubTask(tr("Contacting OSM Server..."));
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72 | if (crosses180th) {
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73 | // API 0.6 does not support requests crossing the 180th meridian, so make two requests
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74 | GpxData result = downloadRawGps("trackpoints?bbox="+lon1+","+lat1+",180.0,"+lat2+"&page=", progressMonitor);
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75 | result.mergeFrom(downloadRawGps("trackpoints?bbox=-180.0,"+lat1+","+lon2+","+lat2+"&page=", progressMonitor));
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76 | return result;
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77 | } else {
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78 | // Simple request
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79 | return downloadRawGps("trackpoints?bbox="+lon1+","+lat1+","+lon2+","+lat2+"&page=", progressMonitor);
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80 | }
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81 | } catch (IllegalArgumentException e) {
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82 | // caused by HttpUrlConnection in case of illegal stuff in the response
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83 | if (cancel)
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84 | return null;
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85 | throw new OsmTransferException("Illegal characters within the HTTP-header response.", e);
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86 | } catch (IOException e) {
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87 | if (cancel)
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88 | return null;
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89 | throw new OsmTransferException(e);
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90 | } catch (SAXException e) {
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91 | throw new OsmTransferException(e);
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92 | } catch (OsmTransferException e) {
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93 | throw e;
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94 | } catch (RuntimeException e) {
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95 | if (cancel)
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96 | return null;
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97 | throw e;
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98 | } finally {
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99 | progressMonitor.finishTask();
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100 | }
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101 | }
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102 |
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103 | protected String getRequestForBbox(double lon1, double lat1, double lon2, double lat2) {
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104 | return "map?bbox=" + lon1 + "," + lat1 + "," + lon2 + "," + lat2;
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105 | }
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106 |
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107 | /**
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108 | * Read the data from the osm server address.
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109 | * @return A data set containing all data retrieved from that url
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110 | */
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111 | @Override
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112 | public DataSet parseOsm(ProgressMonitor progressMonitor) throws OsmTransferException {
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113 | progressMonitor.beginTask(tr("Contacting OSM Server..."), 10);
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114 | InputStream in = null;
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115 | try {
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116 | DataSet ds = null;
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117 | progressMonitor.indeterminateSubTask(null);
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118 | if (crosses180th) {
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119 | // API 0.6 does not support requests crossing the 180th meridian, so make two requests
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120 | in = getInputStream(getRequestForBbox(lon1, lat1, 180.0, lat2), progressMonitor.createSubTaskMonitor(9, false));
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121 | if (in == null)
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122 | return null;
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123 | ds = OsmReader.parseDataSet(in, progressMonitor.createSubTaskMonitor(1, false));
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124 |
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125 | in = getInputStream(getRequestForBbox(-180.0, lat1, lon2, lat2), progressMonitor.createSubTaskMonitor(9, false));
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126 | if (in == null)
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127 | return null;
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128 | DataSet ds2 = OsmReader.parseDataSet(in, progressMonitor.createSubTaskMonitor(1, false));
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129 | if (ds2 == null)
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130 | return null;
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131 | ds.mergeFrom(ds2);
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132 |
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133 | } else {
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134 | // Simple request
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135 | in = getInputStream(getRequestForBbox(lon1, lat1, lon2, lat2), progressMonitor.createSubTaskMonitor(9, false));
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136 | if (in == null)
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137 | return null;
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138 | ds = OsmReader.parseDataSet(in, progressMonitor.createSubTaskMonitor(1, false));
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139 | }
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140 | return ds;
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141 | } catch(OsmTransferException e) {
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142 | throw e;
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143 | } catch (Exception e) {
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144 | throw new OsmTransferException(e);
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145 | } finally {
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146 | progressMonitor.finishTask();
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147 | if (in != null) {
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148 | try {in.close();} catch(IOException e) {}
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149 | }
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150 | activeConnection = null;
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151 | }
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152 | }
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153 | }
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