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.data.Bounds; |
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20 | import org.openstreetmap.josm.data.coor.LatLon; |
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21 | import org.openstreetmap.josm.data.gpx.Extensions; |
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22 | import org.openstreetmap.josm.data.gpx.GpxConstants; |
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23 | import org.openstreetmap.josm.data.gpx.GpxData; |
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24 | import org.openstreetmap.josm.data.gpx.GpxLink; |
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25 | import org.openstreetmap.josm.data.gpx.GpxRoute; |
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26 | import org.openstreetmap.josm.data.gpx.ImmutableGpxTrack; |
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27 | import org.openstreetmap.josm.data.gpx.WayPoint; |
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28 | import org.openstreetmap.josm.tools.Logging; |
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29 | import org.openstreetmap.josm.tools.XmlUtils; |
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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, IGpxReader { |
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45 | |
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46 | private enum State { |
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47 | INIT, |
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48 | GPX, |
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49 | METADATA, |
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50 | WPT, |
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51 | RTE, |
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52 | TRK, |
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53 | EXT, |
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54 | AUTHOR, |
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55 | LINK, |
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56 | TRKSEG, |
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57 | COPYRIGHT |
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58 | } |
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59 | |
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60 | private String version; |
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61 | /** The resulting gpx data */ |
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62 | private GpxData gpxData; |
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63 | private final InputSource inputSource; |
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64 | |
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65 | private class Parser extends DefaultHandler { |
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66 | |
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67 | private GpxData data; |
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68 | private Collection<Collection<WayPoint>> currentTrack; |
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69 | private Map<String, Object> currentTrackAttr; |
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70 | private Collection<WayPoint> currentTrackSeg; |
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71 | private GpxRoute currentRoute; |
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72 | private WayPoint currentWayPoint; |
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73 | |
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74 | private State currentState = State.INIT; |
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75 | |
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76 | private GpxLink currentLink; |
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77 | private Extensions currentExtensions; |
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78 | private Stack<State> states; |
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79 | private final Stack<String> elements = new Stack<>(); |
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80 | |
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81 | private StringBuilder accumulator = new StringBuilder(); |
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82 | |
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83 | private boolean nokiaSportsTrackerBug; |
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84 | |
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85 | @Override |
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86 | public void startDocument() { |
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87 | accumulator = new StringBuilder(); |
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88 | states = new Stack<>(); |
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89 | data = new GpxData(); |
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90 | } |
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91 | |
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92 | private double parseCoord(Attributes atts, String key) { |
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93 | String val = atts.getValue(key); |
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94 | if (val != null) { |
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95 | return parseCoord(val); |
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96 | } else { |
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97 | // Some software do not respect GPX schema and use "minLat" / "minLon" instead of "minlat" / "minlon" |
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98 | return parseCoord(atts.getValue(key.replaceFirst("l", "L"))); |
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99 | } |
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100 | } |
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101 | |
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102 | private double parseCoord(String s) { |
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103 | if (s != null) { |
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104 | try { |
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105 | return Double.parseDouble(s); |
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106 | } catch (NumberFormatException ex) { |
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107 | Logging.trace(ex); |
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108 | } |
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109 | } |
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110 | return Double.NaN; |
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111 | } |
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112 | |
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113 | private LatLon parseLatLon(Attributes atts) { |
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114 | return new LatLon( |
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115 | parseCoord(atts, "lat"), |
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116 | parseCoord(atts, "lon")); |
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117 | } |
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118 | |
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119 | @Override |
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120 | public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException { |
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121 | elements.push(localName); |
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122 | switch(currentState) { |
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123 | case INIT: |
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124 | states.push(currentState); |
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125 | currentState = State.GPX; |
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126 | data.creator = atts.getValue("creator"); |
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127 | version = atts.getValue("version"); |
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128 | if (version != null && version.startsWith("1.0")) { |
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129 | version = "1.0"; |
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130 | } else if (!"1.1".equals(version)) { |
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131 | // unknown version, assume 1.1 |
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132 | version = "1.1"; |
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133 | } |
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134 | break; |
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135 | case GPX: |
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136 | switch (localName) { |
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137 | case "metadata": |
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138 | states.push(currentState); |
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139 | currentState = State.METADATA; |
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140 | break; |
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141 | case "wpt": |
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142 | states.push(currentState); |
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143 | currentState = State.WPT; |
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144 | currentWayPoint = new WayPoint(parseLatLon(atts)); |
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145 | break; |
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146 | case "rte": |
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147 | states.push(currentState); |
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148 | currentState = State.RTE; |
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149 | currentRoute = new GpxRoute(); |
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150 | break; |
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151 | case "trk": |
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152 | states.push(currentState); |
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153 | currentState = State.TRK; |
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154 | currentTrack = new ArrayList<>(); |
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155 | currentTrackAttr = new HashMap<>(); |
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156 | break; |
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157 | case "extensions": |
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158 | states.push(currentState); |
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159 | currentState = State.EXT; |
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160 | currentExtensions = new Extensions(); |
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161 | break; |
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162 | case "gpx": |
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163 | if (atts.getValue("creator") != null && atts.getValue("creator").startsWith("Nokia Sports Tracker")) { |
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164 | nokiaSportsTrackerBug = true; |
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165 | } |
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166 | break; |
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167 | default: // Do nothing |
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168 | } |
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169 | break; |
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170 | case METADATA: |
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171 | switch (localName) { |
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172 | case "author": |
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173 | states.push(currentState); |
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174 | currentState = State.AUTHOR; |
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175 | break; |
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176 | case "extensions": |
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177 | states.push(currentState); |
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178 | currentState = State.EXT; |
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179 | currentExtensions = new Extensions(); |
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180 | break; |
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181 | case "copyright": |
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182 | states.push(currentState); |
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183 | currentState = State.COPYRIGHT; |
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184 | data.put(META_COPYRIGHT_AUTHOR, atts.getValue("author")); |
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185 | break; |
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186 | case "link": |
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187 | states.push(currentState); |
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188 | currentState = State.LINK; |
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189 | currentLink = new GpxLink(atts.getValue("href")); |
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190 | break; |
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191 | case "bounds": |
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192 | data.put(META_BOUNDS, new Bounds( |
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193 | parseCoord(atts, "minlat"), |
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194 | parseCoord(atts, "minlon"), |
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195 | parseCoord(atts, "maxlat"), |
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196 | parseCoord(atts, "maxlon"))); |
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197 | break; |
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198 | default: // Do nothing |
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199 | } |
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200 | break; |
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201 | case AUTHOR: |
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202 | switch (localName) { |
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203 | case "link": |
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204 | states.push(currentState); |
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205 | currentState = State.LINK; |
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206 | currentLink = new GpxLink(atts.getValue("href")); |
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207 | break; |
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208 | case "email": |
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209 | data.put(META_AUTHOR_EMAIL, atts.getValue("id") + '@' + atts.getValue("domain")); |
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210 | break; |
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211 | default: // Do nothing |
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212 | } |
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213 | break; |
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214 | case TRK: |
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215 | switch (localName) { |
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216 | case "trkseg": |
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217 | states.push(currentState); |
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218 | currentState = State.TRKSEG; |
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219 | currentTrackSeg = new ArrayList<>(); |
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220 | break; |
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221 | case "link": |
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222 | states.push(currentState); |
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223 | currentState = State.LINK; |
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224 | currentLink = new GpxLink(atts.getValue("href")); |
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225 | break; |
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226 | case "extensions": |
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227 | states.push(currentState); |
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228 | currentState = State.EXT; |
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229 | currentExtensions = new Extensions(); |
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230 | break; |
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231 | default: // Do nothing |
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232 | } |
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233 | break; |
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234 | case TRKSEG: |
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235 | if ("trkpt".equals(localName)) { |
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236 | states.push(currentState); |
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237 | currentState = State.WPT; |
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238 | currentWayPoint = new WayPoint(parseLatLon(atts)); |
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239 | } |
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240 | break; |
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241 | case WPT: |
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242 | switch (localName) { |
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243 | case "link": |
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244 | states.push(currentState); |
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245 | currentState = State.LINK; |
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246 | currentLink = new GpxLink(atts.getValue("href")); |
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247 | break; |
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248 | case "extensions": |
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249 | states.push(currentState); |
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250 | currentState = State.EXT; |
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251 | currentExtensions = new Extensions(); |
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252 | break; |
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253 | default: // Do nothing |
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254 | } |
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255 | break; |
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256 | case RTE: |
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257 | switch (localName) { |
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258 | case "link": |
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259 | states.push(currentState); |
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260 | currentState = State.LINK; |
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261 | currentLink = new GpxLink(atts.getValue("href")); |
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262 | break; |
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263 | case "rtept": |
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264 | states.push(currentState); |
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265 | currentState = State.WPT; |
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266 | currentWayPoint = new WayPoint(parseLatLon(atts)); |
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267 | break; |
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268 | case "extensions": |
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269 | states.push(currentState); |
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270 | currentState = State.EXT; |
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271 | currentExtensions = new Extensions(); |
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272 | break; |
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273 | default: // Do nothing |
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274 | } |
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275 | break; |
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276 | default: // Do nothing |
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277 | } |
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278 | accumulator.setLength(0); |
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279 | } |
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280 | |
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281 | @Override |
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282 | public void characters(char[] ch, int start, int length) { |
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283 | /** |
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284 | * Remove illegal characters generated by the Nokia Sports Tracker device. |
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285 | * Don't do this crude substitution for all files, since it would destroy |
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286 | * certain unicode characters. |
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287 | */ |
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288 | if (nokiaSportsTrackerBug) { |
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289 | for (int i = 0; i < ch.length; ++i) { |
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290 | if (ch[i] == 1) { |
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291 | ch[i] = 32; |
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292 | } |
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293 | } |
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294 | nokiaSportsTrackerBug = false; |
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295 | } |
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296 | |
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297 | accumulator.append(ch, start, length); |
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298 | } |
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299 | |
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300 | private Map<String, Object> getAttr() { |
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301 | switch (currentState) { |
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302 | case RTE: return currentRoute.attr; |
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303 | case METADATA: return data.attr; |
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304 | case WPT: return currentWayPoint.attr; |
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305 | case TRK: return currentTrackAttr; |
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306 | default: return null; |
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307 | } |
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308 | } |
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309 | |
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310 | @SuppressWarnings("unchecked") |
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311 | @Override |
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312 | public void endElement(String namespaceURI, String localName, String qName) { |
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313 | elements.pop(); |
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314 | switch (currentState) { |
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315 | case GPX: // GPX 1.0 |
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316 | case METADATA: // GPX 1.1 |
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317 | switch (localName) { |
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318 | case "name": |
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319 | data.put(META_NAME, accumulator.toString()); |
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320 | break; |
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321 | case "desc": |
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322 | data.put(META_DESC, accumulator.toString()); |
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323 | break; |
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324 | case "time": |
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325 | data.put(META_TIME, accumulator.toString()); |
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326 | break; |
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327 | case "keywords": |
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328 | data.put(META_KEYWORDS, accumulator.toString()); |
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329 | break; |
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330 | case "author": |
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331 | if ("1.0".equals(version)) { |
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332 | // author is a string in 1.0, but complex element in 1.1 |
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333 | data.put(META_AUTHOR_NAME, accumulator.toString()); |
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334 | } |
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335 | break; |
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336 | case "email": |
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337 | if ("1.0".equals(version)) { |
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338 | data.put(META_AUTHOR_EMAIL, accumulator.toString()); |
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339 | } |
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340 | break; |
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341 | case "url": |
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342 | case "urlname": |
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343 | data.put(localName, accumulator.toString()); |
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344 | break; |
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345 | case "metadata": |
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346 | case "gpx": |
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347 | if ((currentState == State.METADATA && "metadata".equals(localName)) || |
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348 | (currentState == State.GPX && "gpx".equals(localName))) { |
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349 | convertUrlToLink(data.attr); |
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350 | if (currentExtensions != null && !currentExtensions.isEmpty()) { |
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351 | data.put(META_EXTENSIONS, currentExtensions); |
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352 | } |
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353 | currentState = states.pop(); |
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354 | } |
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355 | break; |
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356 | case "bounds": |
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357 | // do nothing, has been parsed on startElement |
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358 | break; |
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359 | default: |
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360 | //TODO: parse extensions |
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361 | } |
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362 | break; |
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363 | case AUTHOR: |
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364 | switch (localName) { |
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365 | case "author": |
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366 | currentState = states.pop(); |
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367 | break; |
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368 | case "name": |
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369 | data.put(META_AUTHOR_NAME, accumulator.toString()); |
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370 | break; |
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371 | case "email": |
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372 | // do nothing, has been parsed on startElement |
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373 | break; |
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374 | case "link": |
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375 | data.put(META_AUTHOR_LINK, currentLink); |
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376 | break; |
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377 | default: // Do nothing |
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378 | } |
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379 | break; |
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380 | case COPYRIGHT: |
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381 | switch (localName) { |
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382 | case "copyright": |
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383 | currentState = states.pop(); |
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384 | break; |
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385 | case "year": |
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386 | data.put(META_COPYRIGHT_YEAR, accumulator.toString()); |
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387 | break; |
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388 | case "license": |
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389 | data.put(META_COPYRIGHT_LICENSE, accumulator.toString()); |
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390 | break; |
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391 | default: // Do nothing |
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392 | } |
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393 | break; |
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394 | case LINK: |
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395 | switch (localName) { |
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396 | case "text": |
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397 | currentLink.text = accumulator.toString(); |
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398 | break; |
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399 | case "type": |
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400 | currentLink.type = accumulator.toString(); |
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401 | break; |
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402 | case "link": |
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403 | if (currentLink.uri == null && accumulator != null && !accumulator.toString().isEmpty()) { |
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404 | currentLink = new GpxLink(accumulator.toString()); |
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405 | } |
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406 | currentState = states.pop(); |
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407 | break; |
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408 | default: // Do nothing |
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409 | } |
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410 | if (currentState == State.AUTHOR) { |
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411 | data.put(META_AUTHOR_LINK, currentLink); |
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412 | } else if (currentState != State.LINK) { |
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413 | Map<String, Object> attr = getAttr(); |
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414 | if (attr != null && !attr.containsKey(META_LINKS)) { |
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415 | attr.put(META_LINKS, new LinkedList<GpxLink>()); |
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416 | } |
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417 | if (attr != null) |
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418 | ((Collection<GpxLink>) attr.get(META_LINKS)).add(currentLink); |
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419 | } |
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420 | break; |
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421 | case WPT: |
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422 | switch (localName) { |
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423 | case "ele": |
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424 | case "magvar": |
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425 | case "name": |
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426 | case "src": |
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427 | case "geoidheight": |
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428 | case "type": |
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429 | case "sym": |
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430 | case "url": |
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431 | case "urlname": |
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432 | currentWayPoint.put(localName, accumulator.toString()); |
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433 | break; |
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434 | case "hdop": |
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435 | case "vdop": |
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436 | case "pdop": |
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437 | try { |
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438 | currentWayPoint.put(localName, Float.valueOf(accumulator.toString())); |
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439 | } catch (NumberFormatException e) { |
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440 | currentWayPoint.put(localName, 0f); |
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441 | } |
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442 | break; |
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443 | case "time": |
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444 | case "cmt": |
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445 | case "desc": |
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446 | currentWayPoint.put(localName, accumulator.toString()); |
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447 | currentWayPoint.setTimeFromAttribute(); |
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448 | break; |
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449 | case "rtept": |
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450 | currentState = states.pop(); |
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451 | convertUrlToLink(currentWayPoint.attr); |
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452 | currentRoute.routePoints.add(currentWayPoint); |
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453 | break; |
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454 | case "trkpt": |
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455 | currentState = states.pop(); |
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456 | convertUrlToLink(currentWayPoint.attr); |
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457 | currentTrackSeg.add(currentWayPoint); |
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458 | break; |
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459 | case "wpt": |
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460 | currentState = states.pop(); |
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461 | convertUrlToLink(currentWayPoint.attr); |
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462 | if (currentExtensions != null && !currentExtensions.isEmpty()) { |
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463 | currentWayPoint.put(META_EXTENSIONS, currentExtensions); |
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464 | } |
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465 | data.waypoints.add(currentWayPoint); |
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466 | break; |
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467 | default: // Do nothing |
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468 | } |
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469 | break; |
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470 | case TRKSEG: |
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471 | if ("trkseg".equals(localName)) { |
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472 | currentState = states.pop(); |
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473 | currentTrack.add(currentTrackSeg); |
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474 | } |
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475 | break; |
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476 | case TRK: |
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477 | switch (localName) { |
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478 | case "trk": |
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479 | currentState = states.pop(); |
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480 | convertUrlToLink(currentTrackAttr); |
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481 | data.addTrack(new ImmutableGpxTrack(currentTrack, currentTrackAttr)); |
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482 | break; |
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483 | case "name": |
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484 | case "cmt": |
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485 | case "desc": |
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486 | case "src": |
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487 | case "type": |
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488 | case "number": |
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489 | case "url": |
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490 | case "urlname": |
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491 | currentTrackAttr.put(localName, accumulator.toString()); |
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492 | break; |
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493 | default: // Do nothing |
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494 | } |
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495 | break; |
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496 | case EXT: |
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497 | if ("extensions".equals(localName)) { |
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498 | currentState = states.pop(); |
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499 | } else if (JOSM_EXTENSIONS_NAMESPACE_URI.equals(namespaceURI)) { |
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500 | // only interested in extensions written by JOSM |
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501 | currentExtensions.put(localName, accumulator.toString()); |
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502 | } |
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503 | break; |
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504 | default: |
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505 | switch (localName) { |
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506 | case "wpt": |
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507 | currentState = states.pop(); |
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508 | break; |
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509 | case "rte": |
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510 | currentState = states.pop(); |
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511 | convertUrlToLink(currentRoute.attr); |
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512 | data.addRoute(currentRoute); |
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513 | break; |
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514 | default: // Do nothing |
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515 | } |
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516 | } |
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517 | } |
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518 | |
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519 | @Override |
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520 | public void endDocument() throws SAXException { |
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521 | if (!states.empty()) |
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522 | throw new SAXException(tr("Parse error: invalid document structure for GPX document.")); |
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523 | Extensions metaExt = (Extensions) data.get(META_EXTENSIONS); |
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524 | if (metaExt != null && "true".equals(metaExt.get("from-server"))) { |
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525 | data.fromServer = true; |
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526 | } |
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527 | gpxData = data; |
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528 | } |
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529 | |
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530 | /** |
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531 | * convert url/urlname to link element (GPX 1.0 -> GPX 1.1). |
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532 | * @param attr attributes |
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533 | */ |
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534 | private void convertUrlToLink(Map<String, Object> attr) { |
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535 | String url = (String) attr.get("url"); |
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536 | String urlname = (String) attr.get("urlname"); |
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537 | if (url != null) { |
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538 | if (!attr.containsKey(META_LINKS)) { |
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539 | attr.put(META_LINKS, new LinkedList<GpxLink>()); |
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540 | } |
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541 | GpxLink link = new GpxLink(url); |
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542 | link.text = urlname; |
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543 | @SuppressWarnings("unchecked") |
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544 | Collection<GpxLink> links = (Collection<GpxLink>) attr.get(META_LINKS); |
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545 | links.add(link); |
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546 | } |
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547 | } |
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548 | |
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549 | void tryToFinish() throws SAXException { |
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550 | List<String> remainingElements = new ArrayList<>(elements); |
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551 | for (int i = remainingElements.size() - 1; i >= 0; i--) { |
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552 | endElement(null, remainingElements.get(i), remainingElements.get(i)); |
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553 | } |
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554 | endDocument(); |
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555 | } |
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556 | } |
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557 | |
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558 | /** |
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559 | * Constructs a new {@code GpxReader}, which can later parse the input stream |
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560 | * and store the result in trackData and markerData |
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561 | * |
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562 | * @param source the source input stream |
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563 | * @throws IOException if an IO error occurs, e.g. the input stream is closed. |
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564 | */ |
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565 | public GpxReader(InputStream source) throws IOException { |
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566 | Reader utf8stream = UTFInputStreamReader.create(source); |
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567 | Reader filtered = new InvalidXmlCharacterFilter(utf8stream); |
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568 | this.inputSource = new InputSource(filtered); |
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569 | } |
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570 | |
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571 | /** |
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572 | * Parse the GPX data. |
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573 | * |
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574 | * @param tryToFinish true, if the reader should return at least part of the GPX |
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575 | * data in case of an error. |
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576 | * @return true if file was properly parsed, false if there was error during |
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577 | * parsing but some data were parsed anyway |
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578 | * @throws SAXException if any SAX parsing error occurs |
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579 | * @throws IOException if any I/O error occurs |
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580 | */ |
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581 | @Override |
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582 | public boolean parse(boolean tryToFinish) throws SAXException, IOException { |
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583 | Parser parser = new Parser(); |
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584 | try { |
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585 | XmlUtils.parseSafeSAX(inputSource, parser); |
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586 | return true; |
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587 | } catch (SAXException e) { |
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588 | if (tryToFinish) { |
---|
589 | parser.tryToFinish(); |
---|
590 | if (parser.data.isEmpty()) |
---|
591 | throw e; |
---|
592 | String message = e.getMessage(); |
---|
593 | if (e instanceof SAXParseException) { |
---|
594 | SAXParseException spe = (SAXParseException) e; |
---|
595 | message += ' ' + tr("(at line {0}, column {1})", spe.getLineNumber(), spe.getColumnNumber()); |
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596 | } |
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597 | Logging.warn(message); |
---|
598 | return false; |
---|
599 | } else |
---|
600 | throw e; |
---|
601 | } catch (ParserConfigurationException e) { |
---|
602 | Logging.error(e); // broken SAXException chaining |
---|
603 | throw new SAXException(e); |
---|
604 | } |
---|
605 | } |
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606 | |
---|
607 | @Override |
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608 | public GpxData getGpxData() { |
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609 | return gpxData; |
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610 | } |
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611 | } |
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