1 | //License: GPL. Copyright 2007 by Immanuel Scholz and others
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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.util.ArrayList;
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11 | import java.util.Collection;
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12 | import java.util.HashMap;
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13 | import java.util.LinkedList;
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14 | import java.util.List;
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15 | import java.util.Map;
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16 | import java.util.Stack;
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17 |
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18 | import javax.xml.parsers.ParserConfigurationException;
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19 | import javax.xml.parsers.SAXParserFactory;
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20 |
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21 | import org.openstreetmap.josm.data.coor.LatLon;
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22 | import org.openstreetmap.josm.data.gpx.GpxData;
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23 | import org.openstreetmap.josm.data.gpx.GpxLink;
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24 | import org.openstreetmap.josm.data.gpx.GpxRoute;
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25 | import org.openstreetmap.josm.data.gpx.ImmutableGpxTrack;
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26 | import org.openstreetmap.josm.data.gpx.WayPoint;
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27 | import org.xml.sax.Attributes;
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28 | import org.xml.sax.InputSource;
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29 | import org.xml.sax.SAXException;
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30 | import org.xml.sax.helpers.DefaultHandler;
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31 |
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32 | /**
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33 | * Read a gpx file. Bounds are not read, as we caluclate them. @see GpxData.recalculateBounds()
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34 | * @author imi, ramack
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35 | */
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36 | public class GpxReader {
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37 | // TODO: implement GPX 1.0 parsing
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38 |
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39 | /**
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40 | * The resulting gpx data
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41 | */
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42 | public GpxData data;
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43 | private enum State { init, metadata, wpt, rte, trk, ext, author, link, trkseg, copyright}
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44 | private InputSource inputSource;
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45 |
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46 | private class Parser extends DefaultHandler {
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47 |
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48 | private GpxData currentData;
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49 | private Collection<Collection<WayPoint>> currentTrack;
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50 | private Map<String, Object> currentTrackAttr;
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51 | private Collection<WayPoint> currentTrackSeg;
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52 | private GpxRoute currentRoute;
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53 | private WayPoint currentWayPoint;
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54 |
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55 | private State currentState = State.init;
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56 |
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57 | private GpxLink currentLink;
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58 | private Stack<State> states;
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59 | private final Stack<String> elements = new Stack<String>();
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60 |
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61 | private StringBuffer accumulator = new StringBuffer();
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62 |
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63 | private boolean nokiaSportsTrackerBug = false;
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64 |
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65 | @Override public void startDocument() {
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66 | accumulator = new StringBuffer();
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67 | states = new Stack<State>();
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68 | currentData = new GpxData();
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69 | }
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70 |
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71 | private double parseCoord(String s) {
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72 | try {
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73 | return Double.parseDouble(s);
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74 | } catch (NumberFormatException ex) {
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75 | return Double.NaN;
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76 | }
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77 | }
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78 |
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79 | private LatLon parseLatLon(Attributes atts) {
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80 | return new LatLon(
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81 | parseCoord(atts.getValue("lat")),
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82 | parseCoord(atts.getValue("lon")));
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83 | }
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84 |
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85 | @Override public void startElement(String namespaceURI, String qName, String rqName, Attributes atts) throws SAXException {
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86 | elements.push(qName);
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87 | switch(currentState) {
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88 | case init:
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89 | if (qName.equals("metadata")) {
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90 | states.push(currentState);
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91 | currentState = State.metadata;
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92 | } else if (qName.equals("wpt")) {
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93 | states.push(currentState);
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94 | currentState = State.wpt;
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95 | currentWayPoint = new WayPoint(parseLatLon(atts));
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96 | } else if (qName.equals("rte")) {
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97 | states.push(currentState);
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98 | currentState = State.rte;
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99 | currentRoute = new GpxRoute();
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100 | } else if (qName.equals("trk")) {
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101 | states.push(currentState);
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102 | currentState = State.trk;
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103 | currentTrack = new ArrayList<Collection<WayPoint>>();
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104 | currentTrackAttr = new HashMap<String, Object>();
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105 | } else if (qName.equals("extensions")) {
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106 | states.push(currentState);
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107 | currentState = State.ext;
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108 | } else if (qName.equals("gpx") && atts.getValue("creator") != null && atts.getValue("creator").startsWith("Nokia Sports Tracker")) {
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109 | nokiaSportsTrackerBug = true;
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110 | }
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111 | break;
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112 | case author:
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113 | if (qName.equals("link")) {
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114 | states.push(currentState);
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115 | currentState = State.link;
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116 | currentLink = new GpxLink(atts.getValue("href"));
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117 | } else if (qName.equals("email")) {
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118 | currentData.attr.put(GpxData.META_AUTHOR_EMAIL, atts.getValue("id") + "@" + atts.getValue("domain"));
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119 | }
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120 | break;
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121 | case trk:
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122 | if (qName.equals("trkseg")) {
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123 | states.push(currentState);
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124 | currentState = State.trkseg;
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125 | currentTrackSeg = new ArrayList<WayPoint>();
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126 | } else if (qName.equals("link")) {
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127 | states.push(currentState);
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128 | currentState = State.link;
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129 | currentLink = new GpxLink(atts.getValue("href"));
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130 | } else if (qName.equals("extensions")) {
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131 | states.push(currentState);
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132 | currentState = State.ext;
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133 | }
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134 | break;
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135 | case metadata:
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136 | if (qName.equals("author")) {
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137 | states.push(currentState);
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138 | currentState = State.author;
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139 | } else if (qName.equals("extensions")) {
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140 | states.push(currentState);
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141 | currentState = State.ext;
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142 | } else if (qName.equals("copyright")) {
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143 | states.push(currentState);
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144 | currentState = State.copyright;
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145 | currentData.attr.put(GpxData.META_COPYRIGHT_AUTHOR, atts.getValue("author"));
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146 | } else if (qName.equals("link")) {
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147 | states.push(currentState);
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148 | currentState = State.link;
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149 | currentLink = new GpxLink(atts.getValue("href"));
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150 | }
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151 | break;
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152 | case trkseg:
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153 | if (qName.equals("trkpt")) {
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154 | states.push(currentState);
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155 | currentState = State.wpt;
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156 | currentWayPoint = new WayPoint(parseLatLon(atts));
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157 | }
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158 | break;
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159 | case wpt:
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160 | if (qName.equals("link")) {
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161 | states.push(currentState);
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162 | currentState = State.link;
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163 | currentLink = new GpxLink(atts.getValue("href"));
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164 | } else if (qName.equals("extensions")) {
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165 | states.push(currentState);
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166 | currentState = State.ext;
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167 | }
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168 | break;
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169 | case rte:
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170 | if (qName.equals("link")) {
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171 | states.push(currentState);
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172 | currentState = State.link;
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173 | currentLink = new GpxLink(atts.getValue("href"));
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174 | } else if (qName.equals("rtept")) {
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175 | states.push(currentState);
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176 | currentState = State.wpt;
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177 | currentWayPoint = new WayPoint(parseLatLon(atts));
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178 | } else if (qName.equals("extensions")) {
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179 | states.push(currentState);
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180 | currentState = State.ext;
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181 | }
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182 | break;
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183 | default:
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184 | }
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185 | accumulator.setLength(0);
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186 | }
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187 |
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188 | @Override public void characters(char[] ch, int start, int length) {
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189 | /**
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190 | * Remove illegal characters generated by the Nokia Sports Tracker device.
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191 | * Don't do this crude substitution for all files, since it would destroy
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192 | * certain unicode characters.
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193 | */
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194 | if (nokiaSportsTrackerBug) {
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195 | for (int i=0; i<ch.length; ++i) {
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196 | if (ch[i] == 1) {
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197 | ch[i] = 32;
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198 | }
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199 | }
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200 | nokiaSportsTrackerBug = false;
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201 | }
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202 |
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203 | accumulator.append(ch, start, length);
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204 | }
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205 |
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206 | private Map<String, Object> getAttr() {
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207 | switch (currentState) {
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208 | case rte: return currentRoute.attr;
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209 | case metadata: return currentData.attr;
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210 | case wpt: return currentWayPoint.attr;
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211 | case trk: return currentTrackAttr;
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212 | default: return null;
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213 | }
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214 | }
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215 |
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216 | @SuppressWarnings("unchecked")
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217 | @Override public void endElement(String namespaceURI, String qName, String rqName) {
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218 | elements.pop();
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219 | switch (currentState) {
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220 | case metadata:
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221 | if (qName.equals("name")) {
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222 | currentData.attr.put(GpxData.META_NAME, accumulator.toString());
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223 | } else if (qName.equals("desc")) {
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224 | currentData.attr.put(GpxData.META_DESC, accumulator.toString());
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225 | } else if (qName.equals("time")) {
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226 | currentData.attr.put(GpxData.META_TIME, accumulator.toString());
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227 | } else if (qName.equals("keywords")) {
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228 | currentData.attr.put(GpxData.META_KEYWORDS, accumulator.toString());
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229 | } else if (qName.equals("metadata")) {
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230 | currentState = states.pop();
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231 | }
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232 | //TODO: parse bounds, extensions
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233 | break;
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234 | case author:
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235 | if (qName.equals("author")) {
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236 | currentState = states.pop();
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237 | } else if (qName.equals("name")) {
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238 | currentData.attr.put(GpxData.META_AUTHOR_NAME, accumulator.toString());
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239 | } else if (qName.equals("email")) {
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240 | // do nothing, has been parsed on startElement
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241 | } else if (qName.equals("link")) {
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242 | currentData.attr.put(GpxData.META_AUTHOR_LINK, currentLink);
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243 | }
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244 | break;
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245 | case copyright:
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246 | if (qName.equals("copyright")) {
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247 | currentState = states.pop();
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248 | } else if (qName.equals("year")) {
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249 | currentData.attr.put(GpxData.META_COPYRIGHT_YEAR, accumulator.toString());
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250 | } else if (qName.equals("license")) {
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251 | currentData.attr.put(GpxData.META_COPYRIGHT_LICENSE, accumulator.toString());
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252 | }
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253 | break;
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254 | case link:
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255 | if (qName.equals("text")) {
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256 | currentLink.text = accumulator.toString();
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257 | } else if (qName.equals("type")) {
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258 | currentLink.type = accumulator.toString();
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259 | } else if (qName.equals("link")) {
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260 | if (currentLink.uri == null && accumulator != null && accumulator.toString().length() != 0) {
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261 | currentLink = new GpxLink(accumulator.toString());
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262 | }
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263 | currentState = states.pop();
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264 | }
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265 | if (currentState == State.author) {
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266 | currentData.attr.put(GpxData.META_AUTHOR_LINK, currentLink);
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267 | } else if (currentState != State.link) {
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268 | Map<String, Object> attr = getAttr();
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269 | if (!attr.containsKey(GpxData.META_LINKS)) {
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270 | attr.put(GpxData.META_LINKS, new LinkedList<GpxLink>());
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271 | }
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272 | ((Collection<GpxLink>) attr.get(GpxData.META_LINKS)).add(currentLink);
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273 | }
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274 | break;
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275 | case wpt:
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276 | if ( qName.equals("ele") || qName.equals("magvar")
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277 | || qName.equals("name") || qName.equals("geoidheight")
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278 | || qName.equals("type") || qName.equals("sym")) {
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279 | currentWayPoint.attr.put(qName, accumulator.toString());
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280 | } else if(qName.equals("hdop") /*|| qName.equals("vdop") ||
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281 | qName.equals("pdop")*/) {
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282 | try {
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283 | currentWayPoint.attr.put(qName, Float.parseFloat(accumulator.toString()));
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284 | } catch(Exception e) {
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285 | currentWayPoint.attr.put(qName, new Float(0));
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286 | }
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287 | } else if (qName.equals("time")) {
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288 | currentWayPoint.attr.put(qName, accumulator.toString());
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289 | currentWayPoint.setTime();
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290 | } else if (qName.equals("cmt") || qName.equals("desc")) {
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291 | currentWayPoint.attr.put(qName, accumulator.toString());
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292 | currentWayPoint.setTime();
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293 | } else if (qName.equals("rtept")) {
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294 | currentState = states.pop();
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295 | currentRoute.routePoints.add(currentWayPoint);
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296 | } else if (qName.equals("trkpt")) {
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297 | currentState = states.pop();
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298 | currentTrackSeg.add(currentWayPoint);
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299 | } else if (qName.equals("wpt")) {
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300 | currentState = states.pop();
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301 | currentData.waypoints.add(currentWayPoint);
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302 | }
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303 | break;
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304 | case trkseg:
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305 | if (qName.equals("trkseg")) {
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306 | currentState = states.pop();
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307 | currentTrack.add(currentTrackSeg);
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308 | }
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309 | break;
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310 | case trk:
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311 | if (qName.equals("trk")) {
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312 | currentState = states.pop();
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313 | currentData.tracks.add(new ImmutableGpxTrack(currentTrack, currentTrackAttr));
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314 | } else if (qName.equals("name") || qName.equals("cmt")
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315 | || qName.equals("desc") || qName.equals("src")
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316 | || qName.equals("type") || qName.equals("number")
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317 | || qName.equals("url")) {
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318 | currentTrackAttr.put(qName, accumulator.toString());
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319 | }
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320 | break;
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321 | case ext:
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322 | if (qName.equals("extensions")) {
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323 | currentState = states.pop();
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324 | }
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325 | break;
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326 | default:
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327 | if (qName.equals("wpt")) {
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328 | currentState = states.pop();
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329 | } else if (qName.equals("rte")) {
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330 | currentState = states.pop();
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331 | currentData.routes.add(currentRoute);
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332 | }
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333 | }
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334 | }
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335 |
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336 | @Override public void endDocument() throws SAXException {
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337 | if (!states.empty())
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338 | throw new SAXException(tr("Parse error: invalid document structure for GPX document."));
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339 | data = currentData;
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340 | }
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341 |
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342 | public void tryToFinish() throws SAXException {
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343 | List<String> remainingElements = new ArrayList<String>(elements);
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344 | for (int i=remainingElements.size() - 1; i >= 0; i--) {
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345 | endElement(null, remainingElements.get(i), null);
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346 | }
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347 | endDocument();
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348 | }
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349 | }
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350 |
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351 | /**
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352 | * Parse the input stream and store the result in trackData and markerData
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353 | *
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354 | */
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355 | public GpxReader(InputStream source) throws IOException {
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356 | this.inputSource = new InputSource(UTFInputStreamReader.create(source, "UTF-8"));
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357 | }
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358 |
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359 | /**
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360 | *
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361 | * @return True if file was properly parsed, false if there was error during parsing but some data were parsed anyway
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362 | * @throws SAXException
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363 | * @throws IOException
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364 | */
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365 | public boolean parse(boolean tryToFinish) throws SAXException, IOException {
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366 | Parser parser = new Parser();
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367 | try {
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368 | SAXParserFactory factory = SAXParserFactory.newInstance();
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369 | factory.setNamespaceAware(true);
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370 | factory.newSAXParser().parse(inputSource, parser);
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371 | return true;
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372 | } catch (SAXException e) {
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373 | if (tryToFinish) {
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374 | parser.tryToFinish();
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375 | if (parser.currentData.isEmpty())
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376 | throw e;
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377 | return false;
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378 | } else
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379 | throw e;
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380 | } catch (ParserConfigurationException e) {
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381 | e.printStackTrace(); // broken SAXException chaining
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382 | throw new SAXException(e);
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383 | }
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384 | }
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385 | }
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