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 | import java.io.Reader;
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9 | import java.util.ArrayList;
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10 | import java.util.Collection;
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11 | import java.util.HashMap;
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12 | import java.util.LinkedList;
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13 | import java.util.List;
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14 | import java.util.Map;
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15 | import java.util.Stack;
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16 |
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17 | import javax.xml.parsers.ParserConfigurationException;
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18 |
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19 | import org.openstreetmap.josm.Main;
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20 | import org.openstreetmap.josm.data.Bounds;
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21 | import org.openstreetmap.josm.data.coor.LatLon;
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22 | import org.openstreetmap.josm.data.gpx.Extensions;
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23 | import org.openstreetmap.josm.data.gpx.GpxConstants;
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24 | import org.openstreetmap.josm.data.gpx.GpxData;
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25 | import org.openstreetmap.josm.data.gpx.GpxLink;
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26 | import org.openstreetmap.josm.data.gpx.GpxRoute;
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27 | import org.openstreetmap.josm.data.gpx.ImmutableGpxTrack;
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28 | import org.openstreetmap.josm.data.gpx.WayPoint;
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29 | import org.openstreetmap.josm.tools.Utils;
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30 | import org.xml.sax.Attributes;
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31 | import org.xml.sax.InputSource;
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32 | import org.xml.sax.SAXException;
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33 | import org.xml.sax.SAXParseException;
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34 | import org.xml.sax.helpers.DefaultHandler;
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35 |
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36 | /**
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37 | * Read a gpx file.
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38 | *
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39 | * Bounds are read, even if we calculate them, see {@link GpxData#recalculateBounds}.<br>
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40 | * Both GPX version 1.0 and 1.1 are supported.
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41 | *
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42 | * @author imi, ramack
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43 | */
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44 | public class GpxReader implements GpxConstants {
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45 |
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46 | private enum State { init, gpx, metadata, wpt, rte, trk, ext, author, link, trkseg, copyright}
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47 |
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48 | private String version;
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49 | /** The resulting gpx data */
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50 | private GpxData gpxData;
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51 | private InputSource inputSource;
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52 |
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53 | private class Parser extends DefaultHandler {
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54 |
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55 | private GpxData data;
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56 | private Collection<Collection<WayPoint>> currentTrack;
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57 | private Map<String, Object> currentTrackAttr;
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58 | private Collection<WayPoint> currentTrackSeg;
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59 | private GpxRoute currentRoute;
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60 | private WayPoint currentWayPoint;
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61 |
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62 | private State currentState = State.init;
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63 |
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64 | private GpxLink currentLink;
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65 | private Extensions currentExtensions;
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66 | private Stack<State> states;
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67 | private final Stack<String> elements = new Stack<>();
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68 |
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69 | private StringBuffer accumulator = new StringBuffer();
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70 |
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71 | private boolean nokiaSportsTrackerBug = false;
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72 |
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73 | @Override
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74 | public void startDocument() {
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75 | accumulator = new StringBuffer();
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76 | states = new Stack<>();
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77 | data = new GpxData();
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78 | }
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79 |
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80 | private double parseCoord(String s) {
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81 | try {
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82 | return Double.parseDouble(s);
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83 | } catch (NumberFormatException ex) {
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84 | return Double.NaN;
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85 | }
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86 | }
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87 |
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88 | private LatLon parseLatLon(Attributes atts) {
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89 | return new LatLon(
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90 | parseCoord(atts.getValue("lat")),
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91 | parseCoord(atts.getValue("lon")));
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92 | }
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93 |
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94 | @Override
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95 | public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
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96 | elements.push(localName);
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97 | switch(currentState) {
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98 | case init:
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99 | states.push(currentState);
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100 | currentState = State.gpx;
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101 | data.creator = atts.getValue("creator");
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102 | version = atts.getValue("version");
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103 | if (version != null && version.startsWith("1.0")) {
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104 | version = "1.0";
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105 | } else if (!"1.1".equals(version)) {
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106 | // unknown version, assume 1.1
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107 | version = "1.1";
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108 | }
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109 | break;
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110 | case gpx:
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111 | switch (localName) {
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112 | case "metadata":
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113 | states.push(currentState);
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114 | currentState = State.metadata;
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115 | break;
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116 | case "wpt":
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117 | states.push(currentState);
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118 | currentState = State.wpt;
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119 | currentWayPoint = new WayPoint(parseLatLon(atts));
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120 | break;
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121 | case "rte":
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122 | states.push(currentState);
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123 | currentState = State.rte;
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124 | currentRoute = new GpxRoute();
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125 | break;
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126 | case "trk":
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127 | states.push(currentState);
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128 | currentState = State.trk;
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129 | currentTrack = new ArrayList<>();
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130 | currentTrackAttr = new HashMap<>();
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131 | break;
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132 | case "extensions":
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133 | states.push(currentState);
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134 | currentState = State.ext;
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135 | currentExtensions = new Extensions();
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136 | break;
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137 | case "gpx":
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138 | if (atts.getValue("creator") != null && atts.getValue("creator").startsWith("Nokia Sports Tracker")) {
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139 | nokiaSportsTrackerBug = true;
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140 | }
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141 | }
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142 | break;
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143 | case metadata:
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144 | switch (localName) {
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145 | case "author":
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146 | states.push(currentState);
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147 | currentState = State.author;
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148 | break;
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149 | case "extensions":
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150 | states.push(currentState);
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151 | currentState = State.ext;
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152 | currentExtensions = new Extensions();
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153 | break;
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154 | case "copyright":
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155 | states.push(currentState);
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156 | currentState = State.copyright;
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157 | data.put(META_COPYRIGHT_AUTHOR, atts.getValue("author"));
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158 | break;
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159 | case "link":
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160 | states.push(currentState);
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161 | currentState = State.link;
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162 | currentLink = new GpxLink(atts.getValue("href"));
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163 | break;
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164 | case "bounds":
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165 | data.put(META_BOUNDS, new Bounds(
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166 | parseCoord(atts.getValue("minlat")),
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167 | parseCoord(atts.getValue("minlon")),
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168 | parseCoord(atts.getValue("maxlat")),
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169 | parseCoord(atts.getValue("maxlon"))));
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170 | }
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171 | break;
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172 | case author:
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173 | switch (localName) {
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174 | case "link":
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175 | states.push(currentState);
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176 | currentState = State.link;
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177 | currentLink = new GpxLink(atts.getValue("href"));
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178 | break;
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179 | case "email":
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180 | data.put(META_AUTHOR_EMAIL, atts.getValue("id") + "@" + atts.getValue("domain"));
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181 | }
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182 | break;
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183 | case trk:
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184 | switch (localName) {
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185 | case "trkseg":
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186 | states.push(currentState);
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187 | currentState = State.trkseg;
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188 | currentTrackSeg = new ArrayList<>();
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189 | break;
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190 | case "link":
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191 | states.push(currentState);
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192 | currentState = State.link;
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193 | currentLink = new GpxLink(atts.getValue("href"));
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194 | break;
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195 | case "extensions":
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196 | states.push(currentState);
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197 | currentState = State.ext;
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198 | currentExtensions = new Extensions();
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199 | }
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200 | break;
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201 | case trkseg:
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202 | if ("trkpt".equals(localName)) {
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203 | states.push(currentState);
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204 | currentState = State.wpt;
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205 | currentWayPoint = new WayPoint(parseLatLon(atts));
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206 | }
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207 | break;
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208 | case wpt:
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209 | switch (localName) {
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210 | case "link":
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211 | states.push(currentState);
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212 | currentState = State.link;
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213 | currentLink = new GpxLink(atts.getValue("href"));
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214 | break;
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215 | case "extensions":
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216 | states.push(currentState);
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217 | currentState = State.ext;
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218 | currentExtensions = new Extensions();
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219 | break;
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220 | }
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221 | break;
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222 | case rte:
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223 | switch (localName) {
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224 | case "link":
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225 | states.push(currentState);
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226 | currentState = State.link;
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227 | currentLink = new GpxLink(atts.getValue("href"));
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228 | break;
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229 | case "rtept":
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230 | states.push(currentState);
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231 | currentState = State.wpt;
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232 | currentWayPoint = new WayPoint(parseLatLon(atts));
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233 | break;
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234 | case "extensions":
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235 | states.push(currentState);
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236 | currentState = State.ext;
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237 | currentExtensions = new Extensions();
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238 | break;
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239 | }
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240 | break;
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241 | }
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242 | accumulator.setLength(0);
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243 | }
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244 |
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245 | @Override
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246 | public void characters(char[] ch, int start, int length) {
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247 | /**
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248 | * Remove illegal characters generated by the Nokia Sports Tracker device.
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249 | * Don't do this crude substitution for all files, since it would destroy
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250 | * certain unicode characters.
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251 | */
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252 | if (nokiaSportsTrackerBug) {
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253 | for (int i = 0; i < ch.length; ++i) {
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254 | if (ch[i] == 1) {
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255 | ch[i] = 32;
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256 | }
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257 | }
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258 | nokiaSportsTrackerBug = false;
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259 | }
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260 |
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261 | accumulator.append(ch, start, length);
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262 | }
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263 |
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264 | private Map<String, Object> getAttr() {
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265 | switch (currentState) {
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266 | case rte: return currentRoute.attr;
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267 | case metadata: return data.attr;
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268 | case wpt: return currentWayPoint.attr;
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269 | case trk: return currentTrackAttr;
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270 | default: return null;
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271 | }
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272 | }
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273 |
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274 | @SuppressWarnings("unchecked")
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275 | @Override
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276 | public void endElement(String namespaceURI, String localName, String qName) {
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277 | elements.pop();
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278 | switch (currentState) {
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279 | case gpx: // GPX 1.0
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280 | case metadata: // GPX 1.1
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281 | switch (localName) {
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282 | case "name":
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283 | data.put(META_NAME, accumulator.toString());
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284 | break;
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285 | case "desc":
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286 | data.put(META_DESC, accumulator.toString());
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287 | break;
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288 | case "time":
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289 | data.put(META_TIME, accumulator.toString());
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290 | break;
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291 | case "keywords":
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292 | data.put(META_KEYWORDS, accumulator.toString());
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293 | break;
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294 | case "author":
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295 | if ("1.0".equals(version)) {
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296 | // author is a string in 1.0, but complex element in 1.1
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297 | data.put(META_AUTHOR_NAME, accumulator.toString());
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298 | }
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299 | break;
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300 | case "email":
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301 | if ("1.0".equals(version)) {
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302 | data.put(META_AUTHOR_EMAIL, accumulator.toString());
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303 | }
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304 | break;
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305 | case "url":
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306 | case "urlname":
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307 | data.put(localName, accumulator.toString());
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308 | break;
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309 | case "metadata":
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310 | case "gpx":
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311 | if ((currentState == State.metadata && "metadata".equals(localName)) ||
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312 | (currentState == State.gpx && "gpx".equals(localName))) {
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313 | convertUrlToLink(data.attr);
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314 | if (currentExtensions != null && !currentExtensions.isEmpty()) {
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315 | data.put(META_EXTENSIONS, currentExtensions);
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316 | }
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317 | currentState = states.pop();
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318 | break;
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319 | }
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320 | case "bounds":
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321 | // do nothing, has been parsed on startElement
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322 | break;
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323 | default:
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324 | //TODO: parse extensions
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325 | }
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326 | break;
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327 | case author:
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328 | switch (localName) {
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329 | case "author":
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330 | currentState = states.pop();
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331 | break;
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332 | case "name":
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333 | data.put(META_AUTHOR_NAME, accumulator.toString());
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334 | break;
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335 | case "email":
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336 | // do nothing, has been parsed on startElement
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337 | break;
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338 | case "link":
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339 | data.put(META_AUTHOR_LINK, currentLink);
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340 | break;
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341 | }
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342 | break;
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343 | case copyright:
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344 | switch (localName) {
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345 | case "copyright":
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346 | currentState = states.pop();
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347 | break;
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348 | case "year":
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349 | data.put(META_COPYRIGHT_YEAR, accumulator.toString());
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350 | break;
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351 | case "license":
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352 | data.put(META_COPYRIGHT_LICENSE, accumulator.toString());
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353 | break;
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354 | }
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355 | break;
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356 | case link:
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357 | switch (localName) {
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358 | case "text":
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359 | currentLink.text = accumulator.toString();
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360 | break;
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361 | case "type":
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362 | currentLink.type = accumulator.toString();
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363 | break;
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364 | case "link":
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365 | if (currentLink.uri == null && accumulator != null && !accumulator.toString().isEmpty()) {
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366 | currentLink = new GpxLink(accumulator.toString());
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367 | }
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368 | currentState = states.pop();
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369 | break;
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370 | }
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371 | if (currentState == State.author) {
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372 | data.put(META_AUTHOR_LINK, currentLink);
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373 | } else if (currentState != State.link) {
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374 | Map<String, Object> attr = getAttr();
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375 | if (!attr.containsKey(META_LINKS)) {
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376 | attr.put(META_LINKS, new LinkedList<GpxLink>());
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377 | }
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378 | ((Collection<GpxLink>) attr.get(META_LINKS)).add(currentLink);
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379 | }
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380 | break;
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381 | case wpt:
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382 | switch (localName) {
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383 | case "ele":
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384 | case "magvar":
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385 | case "name":
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386 | case "src":
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387 | case "geoidheight":
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388 | case "type":
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389 | case "sym":
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390 | case "url":
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391 | case "urlname":
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392 | currentWayPoint.put(localName, accumulator.toString());
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393 | break;
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394 | case "hdop":
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395 | case "vdop":
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396 | case "pdop":
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397 | try {
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398 | currentWayPoint.put(localName, Float.valueOf(accumulator.toString()));
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399 | } catch (Exception e) {
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400 | currentWayPoint.put(localName, new Float(0));
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401 | }
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402 | break;
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403 | case "time":
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404 | case "cmt":
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405 | case "desc":
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406 | currentWayPoint.put(localName, accumulator.toString());
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407 | currentWayPoint.setTime();
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408 | break;
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409 | case "rtept":
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410 | currentState = states.pop();
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411 | convertUrlToLink(currentWayPoint.attr);
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412 | currentRoute.routePoints.add(currentWayPoint);
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413 | break;
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414 | case "trkpt":
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415 | currentState = states.pop();
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416 | convertUrlToLink(currentWayPoint.attr);
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417 | currentTrackSeg.add(currentWayPoint);
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418 | break;
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419 | case "wpt":
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420 | currentState = states.pop();
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421 | convertUrlToLink(currentWayPoint.attr);
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422 | if (currentExtensions != null && !currentExtensions.isEmpty()) {
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423 | currentWayPoint.put(META_EXTENSIONS, currentExtensions);
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424 | }
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425 | data.waypoints.add(currentWayPoint);
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426 | break;
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427 | }
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428 | break;
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429 | case trkseg:
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430 | if ("trkseg".equals(localName)) {
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431 | currentState = states.pop();
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432 | currentTrack.add(currentTrackSeg);
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433 | }
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434 | break;
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435 | case trk:
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436 | switch (localName) {
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437 | case "trk":
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438 | currentState = states.pop();
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439 | convertUrlToLink(currentTrackAttr);
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440 | data.tracks.add(new ImmutableGpxTrack(currentTrack, currentTrackAttr));
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441 | break;
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442 | case "name":
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443 | case "cmt":
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444 | case "desc":
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445 | case "src":
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446 | case "type":
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447 | case "number":
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448 | case "url":
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449 | case "urlname":
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450 | currentTrackAttr.put(localName, accumulator.toString());
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451 | break;
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452 | }
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453 | break;
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454 | case ext:
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455 | if ("extensions".equals(localName)) {
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456 | currentState = states.pop();
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457 | } else if (JOSM_EXTENSIONS_NAMESPACE_URI.equals(namespaceURI)) {
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458 | // only interested in extensions written by JOSM
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459 | currentExtensions.put(localName, accumulator.toString());
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460 | }
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461 | break;
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462 | default:
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463 | switch (localName) {
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464 | case "wpt":
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465 | currentState = states.pop();
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466 | break;
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467 | case "rte":
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468 | currentState = states.pop();
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469 | convertUrlToLink(currentRoute.attr);
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470 | data.routes.add(currentRoute);
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471 | break;
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472 | }
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473 | }
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474 | }
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475 |
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476 | @Override
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477 | public void endDocument() throws SAXException {
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478 | if (!states.empty())
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479 | throw new SAXException(tr("Parse error: invalid document structure for GPX document."));
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480 | Extensions metaExt = (Extensions) data.get(META_EXTENSIONS);
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481 | if (metaExt != null && "true".equals(metaExt.get("from-server"))) {
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482 | data.fromServer = true;
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483 | }
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484 | gpxData = data;
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485 | }
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486 |
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487 | /**
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488 | * convert url/urlname to link element (GPX 1.0 -> GPX 1.1).
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489 | */
|
---|
490 | private void convertUrlToLink(Map<String, Object> attr) {
|
---|
491 | String url = (String) attr.get("url");
|
---|
492 | String urlname = (String) attr.get("urlname");
|
---|
493 | if (url != null) {
|
---|
494 | if (!attr.containsKey(META_LINKS)) {
|
---|
495 | attr.put(META_LINKS, new LinkedList<GpxLink>());
|
---|
496 | }
|
---|
497 | GpxLink link = new GpxLink(url);
|
---|
498 | link.text = urlname;
|
---|
499 | @SuppressWarnings({ "unchecked", "rawtypes" })
|
---|
500 | Collection<GpxLink> links = (Collection<GpxLink>) attr.get(META_LINKS);
|
---|
501 | links.add(link);
|
---|
502 | }
|
---|
503 | }
|
---|
504 |
|
---|
505 | public void tryToFinish() throws SAXException {
|
---|
506 | List<String> remainingElements = new ArrayList<>(elements);
|
---|
507 | for (int i = remainingElements.size() - 1; i >= 0; i--) {
|
---|
508 | endElement(null, remainingElements.get(i), remainingElements.get(i));
|
---|
509 | }
|
---|
510 | endDocument();
|
---|
511 | }
|
---|
512 | }
|
---|
513 |
|
---|
514 | /**
|
---|
515 | * Constructs a new {@code GpxReader}, which can later parse the input stream
|
---|
516 | * and store the result in trackData and markerData
|
---|
517 | *
|
---|
518 | * @param source the source input stream
|
---|
519 | * @throws IOException if an IO error occurs, e.g. the input stream is closed.
|
---|
520 | */
|
---|
521 | @SuppressWarnings("resource")
|
---|
522 | public GpxReader(InputStream source) throws IOException {
|
---|
523 | Reader utf8stream = UTFInputStreamReader.create(source);
|
---|
524 | Reader filtered = new InvalidXmlCharacterFilter(utf8stream);
|
---|
525 | this.inputSource = new InputSource(filtered);
|
---|
526 | }
|
---|
527 |
|
---|
528 | /**
|
---|
529 | * Parse the GPX data.
|
---|
530 | *
|
---|
531 | * @param tryToFinish true, if the reader should return at least part of the GPX
|
---|
532 | * data in case of an error.
|
---|
533 | * @return true if file was properly parsed, false if there was error during
|
---|
534 | * parsing but some data were parsed anyway
|
---|
535 | * @throws SAXException if any SAX parsing error occurs
|
---|
536 | * @throws IOException if any I/O error occurs
|
---|
537 | */
|
---|
538 | public boolean parse(boolean tryToFinish) throws SAXException, IOException {
|
---|
539 | Parser parser = new Parser();
|
---|
540 | try {
|
---|
541 | Utils.parseSafeSAX(inputSource, parser);
|
---|
542 | return true;
|
---|
543 | } catch (SAXException e) {
|
---|
544 | if (tryToFinish) {
|
---|
545 | parser.tryToFinish();
|
---|
546 | if (parser.data.isEmpty())
|
---|
547 | throw e;
|
---|
548 | String message = e.getMessage();
|
---|
549 | if (e instanceof SAXParseException) {
|
---|
550 | SAXParseException spe = (SAXParseException) e;
|
---|
551 | message += " " + tr("(at line {0}, column {1})", spe.getLineNumber(), spe.getColumnNumber());
|
---|
552 | }
|
---|
553 | Main.warn(message);
|
---|
554 | return false;
|
---|
555 | } else
|
---|
556 | throw e;
|
---|
557 | } catch (ParserConfigurationException e) {
|
---|
558 | Main.error(e); // broken SAXException chaining
|
---|
559 | throw new SAXException(e);
|
---|
560 | }
|
---|
561 | }
|
---|
562 |
|
---|
563 | /**
|
---|
564 | * Replies the GPX data.
|
---|
565 | * @return The GPX data
|
---|
566 | */
|
---|
567 | public GpxData getGpxData() {
|
---|
568 | return gpxData;
|
---|
569 | }
|
---|
570 | }
|
---|