1 | //License: GPL. For details, see LICENSE file.
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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.actions.downloadtasks.DownloadGpsTask;
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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.openstreetmap.josm.tools.Utils;
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14 | import org.xml.sax.SAXException;
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15 |
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16 | /**
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17 | * Read content from OSM server for a given URL
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18 | * @since 1146
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19 | */
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20 | public class OsmServerLocationReader extends OsmServerReader {
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21 |
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22 | protected final String url;
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23 |
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24 | /**
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25 | * Constructs a new {@code OsmServerLocationReader}.
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26 | * @param url The URL to fetch
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27 | */
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28 | public OsmServerLocationReader(String url) {
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29 | this.url = url;
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30 | }
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31 |
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32 | protected abstract class Parser<T> {
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33 | protected final ProgressMonitor progressMonitor;
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34 | protected final Compression compression;
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35 | protected InputStream in = null;
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36 |
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37 | public Parser(ProgressMonitor progressMonitor, Compression compression) {
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38 | this.progressMonitor = progressMonitor;
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39 | this.compression = compression;
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40 | }
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41 |
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42 | protected final InputStream getUncompressedInputStream() throws IOException {
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43 | switch (compression) {
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44 | case BZIP2: return FileImporter.getBZip2InputStream(in);
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45 | case GZIP: return FileImporter.getGZipInputStream(in);
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46 | case NONE:
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47 | default: return in;
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48 | }
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49 | }
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50 |
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51 | public abstract T parse() throws OsmTransferException, IllegalDataException, IOException, SAXException;
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52 | }
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53 |
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54 | protected final <T> T doParse(Parser<T> parser, final ProgressMonitor progressMonitor) throws OsmTransferException {
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55 | progressMonitor.beginTask(tr("Contacting Server...", 10));
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56 | try {
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57 | return parser.parse();
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58 | } catch(OsmTransferException e) {
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59 | throw e;
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60 | } catch (Exception e) {
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61 | if (cancel)
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62 | return null;
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63 | throw new OsmTransferException(e);
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64 | } finally {
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65 | progressMonitor.finishTask();
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66 | activeConnection = null;
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67 | Utils.close(parser.in);
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68 | parser.in = null;
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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 | public DataSet parseOsm(final ProgressMonitor progressMonitor) throws OsmTransferException {
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74 | return doParse(new OsmParser(progressMonitor, Compression.NONE), progressMonitor);
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75 | }
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76 |
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77 | @Override
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78 | public DataSet parseOsmBzip2(final ProgressMonitor progressMonitor) throws OsmTransferException {
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79 | return doParse(new OsmParser(progressMonitor, Compression.BZIP2), progressMonitor);
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80 | }
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81 |
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82 | @Override
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83 | public DataSet parseOsmGzip(final ProgressMonitor progressMonitor) throws OsmTransferException {
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84 | return doParse(new OsmParser(progressMonitor, Compression.GZIP), progressMonitor);
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85 | }
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86 |
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87 | @Override
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88 | public DataSet parseOsmChange(final ProgressMonitor progressMonitor) throws OsmTransferException {
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89 | return doParse(new OsmChangeParser(progressMonitor, Compression.NONE), progressMonitor);
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90 | }
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91 |
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92 | @Override
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93 | public DataSet parseOsmChangeBzip2(final ProgressMonitor progressMonitor) throws OsmTransferException {
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94 | return doParse(new OsmChangeParser(progressMonitor, Compression.BZIP2), progressMonitor);
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95 | }
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96 |
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97 | @Override
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98 | public DataSet parseOsmChangeGzip(final ProgressMonitor progressMonitor) throws OsmTransferException {
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99 | return doParse(new OsmChangeParser(progressMonitor, Compression.GZIP), progressMonitor);
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100 | }
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101 |
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102 | @Override
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103 | public GpxData parseRawGps(final ProgressMonitor progressMonitor) throws OsmTransferException {
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104 | return doParse(new GpxParser(progressMonitor, Compression.NONE), progressMonitor);
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105 | }
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106 |
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107 | @Override
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108 | public GpxData parseRawGpsBzip2(final ProgressMonitor progressMonitor) throws OsmTransferException {
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109 | return doParse(new GpxParser(progressMonitor, Compression.BZIP2), progressMonitor);
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110 | }
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111 |
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112 | protected class OsmParser extends Parser<DataSet> {
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113 | protected OsmParser(ProgressMonitor progressMonitor, Compression compression) {
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114 | super(progressMonitor, compression);
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115 | }
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116 |
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117 | @Override
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118 | public DataSet parse() throws OsmTransferException, IllegalDataException, IOException {
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119 | in = getInputStreamRaw(url, progressMonitor.createSubTaskMonitor(9, false));
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120 | if (in == null)
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121 | return null;
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122 | progressMonitor.subTask(tr("Downloading OSM data..."));
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123 | return OsmReader.parseDataSet(getUncompressedInputStream(), progressMonitor.createSubTaskMonitor(1, false));
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124 | }
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125 | }
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126 |
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127 | protected class OsmChangeParser extends Parser<DataSet> {
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128 | protected OsmChangeParser(ProgressMonitor progressMonitor, Compression compression) {
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129 | super(progressMonitor, compression);
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130 | }
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131 |
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132 | @Override
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133 | public DataSet parse() throws OsmTransferException, IllegalDataException, IOException {
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134 | in = getInputStreamRaw(url, progressMonitor.createSubTaskMonitor(9, false));
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135 | if (in == null)
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136 | return null;
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137 | progressMonitor.subTask(tr("Downloading OSM data..."));
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138 | return OsmChangeReader.parseDataSet(getUncompressedInputStream(), progressMonitor.createSubTaskMonitor(1, false));
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139 | }
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140 | }
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141 |
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142 | protected class GpxParser extends Parser<GpxData> {
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143 | protected GpxParser(ProgressMonitor progressMonitor, Compression compression) {
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144 | super(progressMonitor, compression);
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145 | }
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146 |
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147 | @Override
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148 | public GpxData parse() throws OsmTransferException, IllegalDataException, IOException, SAXException {
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149 | in = getInputStreamRaw(url, progressMonitor.createSubTaskMonitor(1, true));
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150 | if (in == null)
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151 | return null;
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152 | progressMonitor.subTask(tr("Downloading OSM data..."));
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153 | GpxReader reader = new GpxReader(getUncompressedInputStream());
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154 | gpxParsedProperly = reader.parse(false);
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155 | GpxData result = reader.getGpxData();
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156 | result.fromServer = DownloadGpsTask.isFromServer(url);
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157 | return result;
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158 | }
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159 | }
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160 | }
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