1 | // License: GPL. Copyright 2007 by Immanuel Scholz and others
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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.InputStreamReader;
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9 | import java.util.Date;
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10 |
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11 | import javax.xml.parsers.ParserConfigurationException;
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12 | import javax.xml.parsers.SAXParserFactory;
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13 |
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14 | import org.openstreetmap.josm.data.coor.LatLon;
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15 | import org.openstreetmap.josm.data.osm.OsmPrimitiveType;
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16 | import org.openstreetmap.josm.data.osm.history.HistoryDataSet;
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17 | import org.openstreetmap.josm.data.osm.history.HistoryNode;
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18 | import org.openstreetmap.josm.data.osm.history.HistoryOsmPrimitive;
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19 | import org.openstreetmap.josm.data.osm.history.HistoryRelation;
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20 | import org.openstreetmap.josm.data.osm.history.HistoryWay;
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21 | import org.openstreetmap.josm.gui.progress.ProgressMonitor;
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22 | import org.openstreetmap.josm.tools.DateUtils;
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23 | import org.xml.sax.Attributes;
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24 | import org.xml.sax.InputSource;
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25 | import org.xml.sax.Locator;
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26 | import org.xml.sax.SAXException;
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27 | import org.xml.sax.helpers.DefaultHandler;
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28 |
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29 | /**
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30 | * Parser for OSM history data.
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31 | *
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32 | * It is slightly different from {@see OsmReader} because we don't build an internal graph of
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33 | * {@see OsmPrimitive}s. We use objects derived from {@see HistoryOsmPrimitive} instead and we
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34 | * keep the data in a dedicated {@see HistoryDataSet}.
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35 | *
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36 | */
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37 | public class OsmHistoryReader {
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38 |
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39 | private InputStream in;
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40 | private HistoryDataSet data;
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41 |
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42 | private class Parser extends DefaultHandler {
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43 |
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44 | /** the current primitive to be read */
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45 | private HistoryOsmPrimitive current;
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46 | private Locator locator;
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47 |
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48 | @Override
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49 | public void setDocumentLocator(Locator locator) {
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50 | this.locator = locator;
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51 | }
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52 |
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53 | protected String getCurrentPosition() {
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54 | if (locator == null)
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55 | return "";
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56 | return "(" + locator.getLineNumber() + "," + locator.getColumnNumber() + ")";
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57 | }
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58 |
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59 | protected void throwException(String message) throws SAXException {
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60 | throw new SAXException(
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61 | getCurrentPosition()
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62 | + message
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63 | );
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64 | }
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65 |
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66 | protected long getMandatoryAttributeLong(Attributes attr, String name) throws SAXException{
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67 | String v = attr.getValue(name);
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68 | if (v == null) {
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69 | throwException(tr("Missing mandatory attribute ''{0}''.", name));
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70 | }
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71 | Long l = 0l;
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72 | try {
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73 | l = Long.parseLong(v);
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74 | } catch(NumberFormatException e) {
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75 | throwException(tr("Illegal value for mandatory attribute ''{0}'' of type long. Got ''{1}''.", name, v));
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76 | }
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77 | if (l < 0) {
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78 | throwException(tr("Illegal value for mandatory attribute ''{0}'' of type long (>=0). Got ''{1}''.", name, v));
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79 | }
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80 | return l;
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81 | }
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82 |
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83 | protected long getAttributeLong(Attributes attr, String name, long defaultValue) throws SAXException{
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84 | String v = attr.getValue(name);
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85 | if (v == null)
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86 | return defaultValue;
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87 | Long l = 0l;
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88 | try {
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89 | l = Long.parseLong(v);
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90 | } catch(NumberFormatException e) {
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91 | throwException(tr("Illegal value for mandatory attribute ''{0}'' of type long. Got ''{1}''.", name, v));
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92 | }
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93 | if (l < 0) {
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94 | throwException(tr("Illegal value for mandatory attribute ''{0}'' of type long (>=0). Got ''{1}''.", name, v));
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95 | }
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96 | return l;
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97 | }
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98 |
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99 | protected Double getMandatoryAttributeDouble(Attributes attr, String name) throws SAXException{
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100 | String v = attr.getValue(name);
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101 | if (v == null) {
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102 | throwException(tr("Missing mandatory attribute ''{0}''.", name));
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103 | }
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104 | double d = 0.0;
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105 | try {
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106 | d = Double.parseDouble(v);
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107 | } catch(NumberFormatException e) {
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108 | throwException(tr("Illegal value for mandatory attribute ''{0}'' of type double. Got ''{1}''.", name, v));
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109 | }
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110 | return d;
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111 | }
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112 |
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113 | protected String getMandatoryAttributeString(Attributes attr, String name) throws SAXException{
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114 | String v = attr.getValue(name);
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115 | if (v == null) {
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116 | throwException(tr("Missing mandatory attribute ''{0}''.", name));
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117 | }
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118 | return v;
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119 | }
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120 |
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121 | protected String getAttributeString(Attributes attr, String name, String defaultValue) {
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122 | String v = attr.getValue(name);
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123 | if (v == null)
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124 | return defaultValue;
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125 | return v;
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126 | }
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127 |
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128 | protected boolean getMandatoryAttributeBoolean(Attributes attr, String name) throws SAXException{
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129 | String v = attr.getValue(name);
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130 | if (v == null) {
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131 | throwException(tr("Missing mandatory attribute ''{0}''.", name));
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132 | }
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133 | if (v.equals("true")) return true;
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134 | if (v.equals("false")) return false;
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135 | throwException(tr("Illegal value for mandatory attribute ''{0}'' of type boolean. Got ''{1}''.", name, v));
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136 | // not reached
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137 | return false;
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138 | }
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139 |
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140 | protected HistoryOsmPrimitive createPrimitive(Attributes atts, OsmPrimitiveType type) throws SAXException {
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141 | long id = getMandatoryAttributeLong(atts,"id");
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142 | long version = getMandatoryAttributeLong(atts,"version");
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143 | long changesetId = getMandatoryAttributeLong(atts,"changeset");
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144 | boolean visible= getMandatoryAttributeBoolean(atts, "visible");
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145 | long uid = getAttributeLong(atts, "uid",-1);
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146 | String user = getAttributeString(atts, "user", tr("<anonymous>"));
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147 | String v = getMandatoryAttributeString(atts, "timestamp");
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148 | Date timestamp = DateUtils.fromString(v);
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149 | HistoryOsmPrimitive primitive = null;
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150 | if (type.equals(OsmPrimitiveType.NODE)) {
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151 | double lat = getMandatoryAttributeDouble(atts, "lat");
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152 | double lon = getMandatoryAttributeDouble(atts, "lon");
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153 | primitive = new HistoryNode(
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154 | id,version,visible,user,uid,changesetId,timestamp, new LatLon(lat,lon)
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155 | );
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156 |
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157 | } else if (type.equals(OsmPrimitiveType.WAY)) {
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158 | primitive = new HistoryWay(
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159 | id,version,visible,user,uid,changesetId,timestamp
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160 | );
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161 | }if (type.equals(OsmPrimitiveType.RELATION)) {
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162 | primitive = new HistoryRelation(
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163 | id,version,visible,user,uid,changesetId,timestamp
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164 | );
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165 | }
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166 | return primitive;
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167 | }
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168 |
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169 | protected void startNode(Attributes atts) throws SAXException {
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170 | current= createPrimitive(atts, OsmPrimitiveType.NODE);
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171 | }
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172 |
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173 | protected void startWay(Attributes atts) throws SAXException {
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174 | current= createPrimitive(atts, OsmPrimitiveType.WAY);
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175 | }
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176 | protected void startRelation(Attributes atts) throws SAXException {
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177 | current= createPrimitive(atts, OsmPrimitiveType.RELATION);
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178 | }
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179 |
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180 | protected void handleTag(Attributes atts) throws SAXException {
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181 | String key= getMandatoryAttributeString(atts, "k");
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182 | String value= getMandatoryAttributeString(atts, "v");
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183 | current.put(key,value);
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184 | }
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185 |
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186 | protected void handleNodeReference(Attributes atts) throws SAXException {
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187 | long ref = getMandatoryAttributeLong(atts, "ref");
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188 | ((HistoryWay)current).addNode(ref);
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189 | }
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190 |
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191 | protected void handleMember(Attributes atts) throws SAXException {
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192 | long ref = getMandatoryAttributeLong(atts, "ref");
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193 | String v = getMandatoryAttributeString(atts, "type");
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194 | OsmPrimitiveType type = null;
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195 | try {
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196 | type = OsmPrimitiveType.fromApiTypeName(v);
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197 | } catch(IllegalArgumentException e) {
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198 | throwException(tr("Illegal value for mandatory attribute ''{0}'' of type OsmPrimitiveType. Got ''{1}''.", "type", v));
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199 | }
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200 | String role = getMandatoryAttributeString(atts, "role");
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201 | org.openstreetmap.josm.data.osm.history.RelationMember member = new org.openstreetmap.josm.data.osm.history.RelationMember(role, type,ref);
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202 | ((HistoryRelation)current).addMember(member);
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203 | }
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204 |
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205 | @Override public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
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206 | if (qName.equals("node")) {
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207 | startNode(atts);
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208 | } else if (qName.equals("way")) {
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209 | startWay(atts);
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210 | } else if (qName.equals("relation")) {
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211 | startRelation(atts);
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212 | } else if (qName.equals("tag")) {
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213 | handleTag(atts);
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214 | } else if (qName.equals("nd")) {
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215 | handleNodeReference(atts);
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216 | } else if (qName.equals("member")) {
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217 | handleMember(atts);
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218 | }
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219 | }
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220 |
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221 | @Override
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222 | public void endElement(String uri, String localName, String qName) throws SAXException {
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223 | if (qName.equals("node")
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224 | || qName.equals("way")
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225 | || qName.equals("relation")) {
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226 | data.put(current);
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227 | }
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228 | }
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229 | }
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230 |
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231 | public OsmHistoryReader(InputStream source) {
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232 | this.in = source;
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233 | data = new HistoryDataSet();
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234 | }
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235 |
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236 | public HistoryDataSet parse(ProgressMonitor progressMonitor) throws SAXException, IOException {
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237 | InputSource inputSource = new InputSource(new InputStreamReader(in, "UTF-8"));
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238 | progressMonitor.beginTask(tr("Parsing OSM history data ..."));
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239 | try {
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240 | SAXParserFactory.newInstance().newSAXParser().parse(inputSource, new Parser());
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241 | } catch (ParserConfigurationException e1) {
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242 | e1.printStackTrace(); // broken SAXException chaining
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243 | throw new SAXException(e1);
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244 | } finally {
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245 | progressMonitor.finishTask();
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246 | }
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247 | return data;
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248 | }
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249 | }
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