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