1 | //License: GPL. For details, see LICENSE file.
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2 |
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3 | //TODO: this is far from complete, but can emulate old RawGps behaviour
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4 | package org.openstreetmap.josm.io;
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5 |
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6 | import static org.openstreetmap.josm.tools.I18n.tr;
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7 |
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8 | import java.io.IOException;
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9 | import java.io.InputStream;
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10 | import java.io.Reader;
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11 | import java.util.ArrayList;
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12 | import java.util.Collection;
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13 | import java.util.HashMap;
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14 | import java.util.LinkedList;
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15 | import java.util.List;
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16 | import java.util.Map;
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17 | import java.util.Stack;
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18 |
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19 | import javax.xml.parsers.ParserConfigurationException;
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20 |
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21 | import org.openstreetmap.josm.Main;
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22 | import org.openstreetmap.josm.data.Bounds;
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23 | import org.openstreetmap.josm.data.coor.LatLon;
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24 | import org.openstreetmap.josm.data.gpx.Extensions;
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25 | import org.openstreetmap.josm.data.gpx.GpxConstants;
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26 | import org.openstreetmap.josm.data.gpx.GpxData;
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27 | import org.openstreetmap.josm.data.gpx.GpxLink;
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28 | import org.openstreetmap.josm.data.gpx.GpxRoute;
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29 | import org.openstreetmap.josm.data.gpx.ImmutableGpxTrack;
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30 | import org.openstreetmap.josm.data.gpx.WayPoint;
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31 | import org.openstreetmap.josm.tools.Utils;
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32 | import org.xml.sax.Attributes;
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33 | import org.xml.sax.InputSource;
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34 | import org.xml.sax.SAXException;
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35 | import org.xml.sax.SAXParseException;
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36 | import org.xml.sax.helpers.DefaultHandler;
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37 |
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38 | /**
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39 | * Read a gpx file.
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40 | *
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41 | * Bounds are read, even if we calculate them, see {@link GpxData#recalculateBounds}.<br>
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42 | * Both GPX version 1.0 and 1.1 are supported.
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43 | *
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44 | * @author imi, ramack
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45 | */
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46 | public class GpxReader implements GpxConstants {
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47 |
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48 | private String version;
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49 | /**
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50 | * The resulting gpx data
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51 | */
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52 | private GpxData gpxData;
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53 | private enum State { init, gpx, metadata, wpt, rte, trk, ext, author, link, trkseg, copyright}
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54 | private InputSource inputSource;
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55 |
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56 | private class Parser extends DefaultHandler {
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57 |
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58 | private GpxData data;
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59 | private Collection<Collection<WayPoint>> currentTrack;
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60 | private Map<String, Object> currentTrackAttr;
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61 | private Collection<WayPoint> currentTrackSeg;
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62 | private GpxRoute currentRoute;
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63 | private WayPoint currentWayPoint;
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64 |
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65 | private State currentState = State.init;
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66 |
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67 | private GpxLink currentLink;
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68 | private Extensions currentExtensions;
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69 | private Stack<State> states;
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70 | private final Stack<String> elements = new Stack<>();
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71 |
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72 | private StringBuffer accumulator = new StringBuffer();
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73 |
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74 | private boolean nokiaSportsTrackerBug = false;
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75 |
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76 | @Override
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77 | public void startDocument() {
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78 | accumulator = new StringBuffer();
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79 | states = new Stack<>();
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80 | data = new GpxData();
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81 | }
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82 |
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83 | private double parseCoord(String s) {
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84 | try {
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85 | return Double.parseDouble(s);
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86 | } catch (NumberFormatException ex) {
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87 | return Double.NaN;
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88 | }
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89 | }
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90 |
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91 | private LatLon parseLatLon(Attributes atts) {
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92 | return new LatLon(
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93 | parseCoord(atts.getValue("lat")),
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94 | parseCoord(atts.getValue("lon")));
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95 | }
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96 |
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97 | @Override
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98 | public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
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99 | elements.push(localName);
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100 | switch(currentState) {
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101 | case init:
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102 | states.push(currentState);
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103 | currentState = State.gpx;
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104 | data.creator = atts.getValue("creator");
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105 | version = atts.getValue("version");
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106 | if (version != null && version.startsWith("1.0")) {
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107 | version = "1.0";
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108 | } else if (!"1.1".equals(version)) {
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109 | // unknown version, assume 1.1
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110 | version = "1.1";
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111 | }
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112 | break;
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113 | case gpx:
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114 | switch (localName) {
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115 | case "metadata":
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116 | states.push(currentState);
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117 | currentState = State.metadata;
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118 | break;
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119 | case "wpt":
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120 | states.push(currentState);
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121 | currentState = State.wpt;
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122 | currentWayPoint = new WayPoint(parseLatLon(atts));
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123 | break;
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124 | case "rte":
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125 | states.push(currentState);
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126 | currentState = State.rte;
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127 | currentRoute = new GpxRoute();
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128 | break;
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129 | case "trk":
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130 | states.push(currentState);
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131 | currentState = State.trk;
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132 | currentTrack = new ArrayList<>();
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133 | currentTrackAttr = new HashMap<>();
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134 | break;
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135 | case "extensions":
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136 | states.push(currentState);
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137 | currentState = State.ext;
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138 | currentExtensions = new Extensions();
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139 | break;
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140 | case "gpx":
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141 | if (atts.getValue("creator") != null && atts.getValue("creator").startsWith("Nokia Sports Tracker")) {
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142 | nokiaSportsTrackerBug = true;
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143 | }
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144 | }
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145 | break;
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146 | case metadata:
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147 | switch (localName) {
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148 | case "author":
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149 | states.push(currentState);
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150 | currentState = State.author;
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151 | break;
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152 | case "extensions":
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153 | states.push(currentState);
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154 | currentState = State.ext;
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155 | currentExtensions = new Extensions();
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156 | break;
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157 | case "copyright":
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158 | states.push(currentState);
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159 | currentState = State.copyright;
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160 | data.put(META_COPYRIGHT_AUTHOR, atts.getValue("author"));
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161 | break;
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162 | case "link":
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163 | states.push(currentState);
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164 | currentState = State.link;
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165 | currentLink = new GpxLink(atts.getValue("href"));
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166 | break;
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167 | case "bounds":
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168 | data.put(META_BOUNDS, new Bounds(
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169 | parseCoord(atts.getValue("minlat")),
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170 | parseCoord(atts.getValue("minlon")),
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171 | parseCoord(atts.getValue("maxlat")),
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172 | parseCoord(atts.getValue("maxlon"))));
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173 | }
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174 | break;
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175 | case author:
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176 | switch (localName) {
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177 | case "link":
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178 | states.push(currentState);
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179 | currentState = State.link;
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180 | currentLink = new GpxLink(atts.getValue("href"));
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181 | break;
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182 | case "email":
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183 | data.put(META_AUTHOR_EMAIL, atts.getValue("id") + "@" + atts.getValue("domain"));
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184 | }
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185 | break;
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186 | case trk:
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187 | switch (localName) {
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188 | case "trkseg":
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189 | states.push(currentState);
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190 | currentState = State.trkseg;
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191 | currentTrackSeg = new ArrayList<>();
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192 | break;
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193 | case "link":
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194 | states.push(currentState);
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195 | currentState = State.link;
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196 | currentLink = new GpxLink(atts.getValue("href"));
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197 | break;
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198 | case "extensions":
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199 | states.push(currentState);
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200 | currentState = State.ext;
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201 | currentExtensions = new Extensions();
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202 | }
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203 | break;
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204 | case trkseg:
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205 | if ("trkpt".equals(localName)) {
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206 | states.push(currentState);
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207 | currentState = State.wpt;
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208 | currentWayPoint = new WayPoint(parseLatLon(atts));
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209 | }
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210 | break;
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211 | case wpt:
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212 | switch (localName) {
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213 | case "link":
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214 | states.push(currentState);
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215 | currentState = State.link;
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216 | currentLink = new GpxLink(atts.getValue("href"));
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217 | break;
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218 | case "extensions":
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219 | states.push(currentState);
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220 | currentState = State.ext;
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221 | currentExtensions = new Extensions();
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222 | break;
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223 | }
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224 | break;
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225 | case rte:
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226 | switch (localName) {
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227 | case "link":
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228 | states.push(currentState);
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229 | currentState = State.link;
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230 | currentLink = new GpxLink(atts.getValue("href"));
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231 | break;
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232 | case "rtept":
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233 | states.push(currentState);
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234 | currentState = State.wpt;
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235 | currentWayPoint = new WayPoint(parseLatLon(atts));
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236 | break;
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237 | case "extensions":
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238 | states.push(currentState);
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239 | currentState = State.ext;
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240 | currentExtensions = new Extensions();
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241 | break;
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242 | }
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243 | break;
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244 | }
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245 | accumulator.setLength(0);
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246 | }
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247 |
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248 | @Override
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249 | public void characters(char[] ch, int start, int length) {
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250 | /**
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251 | * Remove illegal characters generated by the Nokia Sports Tracker device.
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252 | * Don't do this crude substitution for all files, since it would destroy
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253 | * certain unicode characters.
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254 | */
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255 | if (nokiaSportsTrackerBug) {
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256 | for (int i=0; i<ch.length; ++i) {
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257 | if (ch[i] == 1) {
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258 | ch[i] = 32;
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259 | }
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260 | }
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261 | nokiaSportsTrackerBug = false;
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262 | }
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263 |
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264 | accumulator.append(ch, start, length);
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265 | }
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266 |
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267 | private Map<String, Object> getAttr() {
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268 | switch (currentState) {
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269 | case rte: return currentRoute.attr;
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270 | case metadata: return data.attr;
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271 | case wpt: return currentWayPoint.attr;
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272 | case trk: return currentTrackAttr;
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273 | default: return null;
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274 | }
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275 | }
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276 |
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277 | @SuppressWarnings("unchecked")
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278 | @Override
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279 | public void endElement(String namespaceURI, String localName, String qName) {
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280 | elements.pop();
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281 | switch (currentState) {
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282 | case gpx: // GPX 1.0
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283 | case metadata: // GPX 1.1
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284 | switch (localName) {
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285 | case "name":
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286 | data.put(META_NAME, accumulator.toString());
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287 | break;
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288 | case "desc":
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289 | data.put(META_DESC, accumulator.toString());
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290 | break;
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291 | case "time":
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292 | data.put(META_TIME, accumulator.toString());
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293 | break;
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294 | case "keywords":
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295 | data.put(META_KEYWORDS, accumulator.toString());
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296 | break;
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297 | case "author":
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298 | if ("1.0".equals(version)) {
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299 | // author is a string in 1.0, but complex element in 1.1
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300 | data.put(META_AUTHOR_NAME, accumulator.toString());
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301 | }
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302 | break;
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303 | case "email":
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304 | if ("1.0".equals(version)) {
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305 | data.put(META_AUTHOR_EMAIL, accumulator.toString());
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306 | }
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307 | break;
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308 | case "url":
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309 | case "urlname":
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310 | data.put(localName, accumulator.toString());
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311 | break;
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312 | case "metadata":
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313 | case "gpx":
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314 | if ((currentState == State.metadata && "metadata".equals(localName)) ||
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315 | (currentState == State.gpx && "gpx".equals(localName))) {
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316 | convertUrlToLink(data.attr);
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317 | if (currentExtensions != null && !currentExtensions.isEmpty()) {
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318 | data.put(META_EXTENSIONS, currentExtensions);
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319 | }
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320 | currentState = states.pop();
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321 | break;
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322 | }
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323 | case "bounds":
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324 | // do nothing, has been parsed on startElement
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325 | break;
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326 | default:
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327 | //TODO: parse extensions
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328 | }
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329 | break;
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330 | case author:
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331 | switch (localName) {
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332 | case "author":
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333 | currentState = states.pop();
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334 | break;
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335 | case "name":
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336 | data.put(META_AUTHOR_NAME, accumulator.toString());
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337 | break;
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338 | case "email":
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339 | // do nothing, has been parsed on startElement
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340 | break;
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341 | case "link":
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342 | data.put(META_AUTHOR_LINK, currentLink);
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343 | break;
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344 | }
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345 | break;
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346 | case copyright:
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347 | switch (localName) {
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348 | case "copyright":
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349 | currentState = states.pop();
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350 | break;
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351 | case "year":
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352 | data.put(META_COPYRIGHT_YEAR, accumulator.toString());
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353 | break;
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354 | case "license":
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355 | data.put(META_COPYRIGHT_LICENSE, accumulator.toString());
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356 | break;
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357 | }
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358 | break;
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359 | case link:
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360 | switch (localName) {
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361 | case "text":
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362 | currentLink.text = accumulator.toString();
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363 | break;
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364 | case "type":
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365 | currentLink.type = accumulator.toString();
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366 | break;
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367 | case "link":
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368 | if (currentLink.uri == null && accumulator != null && accumulator.toString().length() != 0) {
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369 | currentLink = new GpxLink(accumulator.toString());
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370 | }
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371 | currentState = states.pop();
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372 | break;
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373 | }
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374 | if (currentState == State.author) {
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375 | data.put(META_AUTHOR_LINK, currentLink);
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376 | } else if (currentState != State.link) {
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377 | Map<String, Object> attr = getAttr();
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378 | if (!attr.containsKey(META_LINKS)) {
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379 | attr.put(META_LINKS, new LinkedList<GpxLink>());
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380 | }
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381 | ((Collection<GpxLink>) attr.get(META_LINKS)).add(currentLink);
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382 | }
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383 | break;
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384 | case wpt:
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385 | switch (localName) {
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386 | case "ele":
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387 | case "magvar":
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388 | case "name":
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389 | case "src":
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390 | case "geoidheight":
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391 | case "type":
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392 | case "sym":
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393 | case "url":
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394 | case "urlname":
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395 | currentWayPoint.put(localName, accumulator.toString());
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396 | break;
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397 | case "hdop":
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398 | case "vdop":
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399 | case "pdop":
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400 | try {
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401 | currentWayPoint.put(localName, Float.parseFloat(accumulator.toString()));
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402 | } catch(Exception e) {
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403 | currentWayPoint.put(localName, new Float(0));
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404 | }
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405 | break;
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406 | case "time":
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407 | case "cmt":
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408 | case "desc":
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409 | currentWayPoint.put(localName, accumulator.toString());
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410 | currentWayPoint.setTime();
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411 | break;
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412 | case "rtept":
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413 | currentState = states.pop();
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414 | convertUrlToLink(currentWayPoint.attr);
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415 | currentRoute.routePoints.add(currentWayPoint);
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416 | break;
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417 | case "trkpt":
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418 | currentState = states.pop();
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419 | convertUrlToLink(currentWayPoint.attr);
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420 | currentTrackSeg.add(currentWayPoint);
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421 | break;
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422 | case "wpt":
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423 | currentState = states.pop();
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424 | convertUrlToLink(currentWayPoint.attr);
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425 | if (currentExtensions != null && !currentExtensions.isEmpty()) {
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426 | currentWayPoint.put(META_EXTENSIONS, currentExtensions);
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427 | }
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428 | data.waypoints.add(currentWayPoint);
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429 | break;
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430 | }
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431 | break;
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432 | case trkseg:
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433 | if ("trkseg".equals(localName)) {
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434 | currentState = states.pop();
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435 | currentTrack.add(currentTrackSeg);
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436 | }
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437 | break;
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438 | case trk:
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439 | switch (localName) {
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440 | case "trk":
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441 | currentState = states.pop();
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442 | convertUrlToLink(currentTrackAttr);
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443 | data.tracks.add(new ImmutableGpxTrack(currentTrack, currentTrackAttr));
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444 | break;
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445 | case "name":
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446 | case "cmt":
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447 | case "desc":
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448 | case "src":
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449 | case "type":
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450 | case "number":
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451 | case "url":
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452 | case "urlname":
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453 | currentTrackAttr.put(localName, accumulator.toString());
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454 | break;
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455 | }
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456 | break;
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457 | case ext:
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458 | if ("extensions".equals(localName)) {
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459 | currentState = states.pop();
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460 | } else if (JOSM_EXTENSIONS_NAMESPACE_URI.equals(namespaceURI)) {
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461 | // only interested in extensions written by JOSM
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462 | currentExtensions.put(localName, accumulator.toString());
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463 | }
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464 | break;
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465 | default:
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466 | switch (localName) {
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467 | case "wpt":
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468 | currentState = states.pop();
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469 | break;
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470 | case "rte":
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471 | currentState = states.pop();
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472 | convertUrlToLink(currentRoute.attr);
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473 | data.routes.add(currentRoute);
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474 | break;
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475 | }
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476 | }
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477 | }
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478 |
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479 | @Override
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480 | public void endDocument() throws SAXException {
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481 | if (!states.empty())
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482 | throw new SAXException(tr("Parse error: invalid document structure for GPX document."));
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483 | Extensions metaExt = (Extensions) data.get(META_EXTENSIONS);
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484 | if (metaExt != null && "true".equals(metaExt.get("from-server"))) {
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485 | data.fromServer = true;
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486 | }
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487 | gpxData = data;
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488 | }
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489 |
|
---|
490 | /**
|
---|
491 | * convert url/urlname to link element (GPX 1.0 -> GPX 1.1).
|
---|
492 | */
|
---|
493 | private void convertUrlToLink(Map<String, Object> attr) {
|
---|
494 | String url = (String) attr.get("url");
|
---|
495 | String urlname = (String) attr.get("urlname");
|
---|
496 | if (url != null) {
|
---|
497 | if (!attr.containsKey(META_LINKS)) {
|
---|
498 | attr.put(META_LINKS, new LinkedList<GpxLink>());
|
---|
499 | }
|
---|
500 | GpxLink link = new GpxLink(url);
|
---|
501 | link.text = urlname;
|
---|
502 | @SuppressWarnings({ "unchecked", "rawtypes" })
|
---|
503 | Collection<GpxLink> links = (Collection<GpxLink>) attr.get(META_LINKS);
|
---|
504 | links.add(link);
|
---|
505 | }
|
---|
506 | }
|
---|
507 |
|
---|
508 | public void tryToFinish() throws SAXException {
|
---|
509 | List<String> remainingElements = new ArrayList<>(elements);
|
---|
510 | for (int i=remainingElements.size() - 1; i >= 0; i--) {
|
---|
511 | endElement(null, remainingElements.get(i), remainingElements.get(i));
|
---|
512 | }
|
---|
513 | endDocument();
|
---|
514 | }
|
---|
515 | }
|
---|
516 |
|
---|
517 | /**
|
---|
518 | * Constructs a new {@code GpxReader}, which can later parse the input stream
|
---|
519 | * and store the result in trackData and markerData
|
---|
520 | *
|
---|
521 | * @param source the source input stream
|
---|
522 | * @throws IOException if an IO error occurs, e.g. the input stream is closed.
|
---|
523 | */
|
---|
524 | @SuppressWarnings("resource")
|
---|
525 | public GpxReader(InputStream source) throws IOException {
|
---|
526 | Reader utf8stream = UTFInputStreamReader.create(source);
|
---|
527 | Reader filtered = new InvalidXmlCharacterFilter(utf8stream);
|
---|
528 | this.inputSource = new InputSource(filtered);
|
---|
529 | }
|
---|
530 |
|
---|
531 | /**
|
---|
532 | * Parse the GPX data.
|
---|
533 | *
|
---|
534 | * @param tryToFinish true, if the reader should return at least part of the GPX
|
---|
535 | * data in case of an error.
|
---|
536 | * @return true if file was properly parsed, false if there was error during
|
---|
537 | * parsing but some data were parsed anyway
|
---|
538 | * @throws SAXException
|
---|
539 | * @throws IOException
|
---|
540 | */
|
---|
541 | public boolean parse(boolean tryToFinish) throws SAXException, IOException {
|
---|
542 | Parser parser = new Parser();
|
---|
543 | try {
|
---|
544 | Utils.newSafeSAXParser().parse(inputSource, parser);
|
---|
545 | return true;
|
---|
546 | } catch (SAXException e) {
|
---|
547 | if (tryToFinish) {
|
---|
548 | parser.tryToFinish();
|
---|
549 | if (parser.data.isEmpty())
|
---|
550 | throw e;
|
---|
551 | String message = e.getMessage();
|
---|
552 | if (e instanceof SAXParseException) {
|
---|
553 | SAXParseException spe = ((SAXParseException)e);
|
---|
554 | message += " " + tr("(at line {0}, column {1})", spe.getLineNumber(), spe.getColumnNumber());
|
---|
555 | }
|
---|
556 | Main.warn(message);
|
---|
557 | return false;
|
---|
558 | } else
|
---|
559 | throw e;
|
---|
560 | } catch (ParserConfigurationException e) {
|
---|
561 | Main.error(e); // broken SAXException chaining
|
---|
562 | throw new SAXException(e);
|
---|
563 | }
|
---|
564 | }
|
---|
565 |
|
---|
566 | /**
|
---|
567 | * Replies the GPX data.
|
---|
568 | * @return The GPX data
|
---|
569 | */
|
---|
570 | public GpxData getGpxData() {
|
---|
571 | return gpxData;
|
---|
572 | }
|
---|
573 | }
|
---|