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 java.io.PrintWriter;
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5 | import java.util.HashMap;
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6 | import java.util.Map.Entry;
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7 |
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8 | import org.openstreetmap.josm.data.osm.Changeset;
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9 | import org.openstreetmap.josm.data.osm.DataSet;
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10 | import org.openstreetmap.josm.data.osm.DataSource;
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11 | import org.openstreetmap.josm.data.osm.Node;
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12 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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13 | import org.openstreetmap.josm.data.osm.OsmPrimitiveType;
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14 | import org.openstreetmap.josm.data.osm.Relation;
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15 | import org.openstreetmap.josm.data.osm.RelationMember;
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16 | import org.openstreetmap.josm.data.osm.Way;
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17 | import org.openstreetmap.josm.data.osm.visitor.Visitor;
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18 | import org.openstreetmap.josm.tools.DateUtils;
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19 |
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20 | /**
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21 | * Save the dataset into a stream as osm intern xml format. This is not using any
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22 | * xml library for storing.
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23 | * @author imi
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24 | */
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25 | public class OsmWriter extends XmlWriter implements Visitor {
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26 |
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27 | public final String DEFAULT_API_VERSION = "0.6";
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28 |
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29 | /**
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30 | * The counter for newly created objects. Starts at -1 and goes down.
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31 | */
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32 | private long newIdCounter = -1;
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33 |
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34 | /**
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35 | * All newly created ids and their primitive that uses it. This is a back reference
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36 | * map to allow references to use the correnct primitives.
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37 | */
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38 | public HashMap<OsmPrimitive, Long> usedNewIds = new HashMap<OsmPrimitive, Long>();
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39 |
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40 | private boolean osmConform;
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41 | private boolean withBody = true;
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42 | private String version;
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43 | private Changeset changeset;
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44 |
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45 | public OsmWriter(PrintWriter out, boolean osmConform, String version) {
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46 | super(out);
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47 | this.osmConform = osmConform;
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48 | this.version = (version == null ? DEFAULT_API_VERSION : version);
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49 | }
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50 |
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51 | public void setWithBody(boolean wb) {
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52 | this.withBody = wb;
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53 | }
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54 | public void setChangeset(Changeset cs) {
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55 | this.changeset = cs;
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56 | }
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57 | public void setVersion(String v) {
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58 | this.version = v;
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59 | }
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60 |
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61 | public void header() {
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62 | out.println("<?xml version='1.0' encoding='UTF-8'?>");
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63 | out.print("<osm version='");
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64 | out.print(version);
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65 | out.println("' generator='JOSM'>");
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66 | }
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67 | public void footer() {
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68 | out.println("</osm>");
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69 | }
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70 |
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71 | public void writeContent(DataSet ds) {
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72 | for (Node n : ds.nodes)
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73 | if (shouldWrite(n)) {
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74 | visit(n);
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75 | }
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76 | for (Way w : ds.ways)
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77 | if (shouldWrite(w)) {
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78 | visit(w);
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79 | }
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80 | for (Relation e : ds.relations)
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81 | if (shouldWrite(e)) {
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82 | visit(e);
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83 | }
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84 | }
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85 |
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86 | private boolean shouldWrite(OsmPrimitive osm) {
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87 | return osm.id != 0 || !osm.deleted;
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88 | }
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89 |
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90 | public void writeDataSources(DataSet ds) {
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91 | for (DataSource s : ds.dataSources) {
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92 | out.println(" <bounds minlat='"
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93 | + s.bounds.min.lat()+"' minlon='"
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94 | + s.bounds.min.lon()+"' maxlat='"
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95 | + s.bounds.max.lat()+"' maxlon='"
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96 | + s.bounds.max.lon()
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97 | +"' origin='"+XmlWriter.encode(s.origin)+"' />");
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98 | }
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99 | }
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100 |
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101 | public void visit(Node n) {
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102 | if (n.incomplete) return;
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103 | addCommon(n, "node");
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104 | out.print(" lat='"+n.getCoor().lat()+"' lon='"+n.getCoor().lon()+"'");
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105 | if (!withBody) {
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106 | out.println("/>");
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107 | } else {
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108 | addTags(n, "node", true);
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109 | }
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110 | }
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111 |
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112 | public void visit(Way w) {
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113 | if (w.incomplete) return;
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114 | addCommon(w, "way");
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115 | if (!withBody) {
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116 | out.println("/>");
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117 | } else {
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118 | out.println(">");
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119 | for (Node n : w.getNodes()) {
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120 | out.println(" <nd ref='"+getUsedId(n)+"' />");
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121 | }
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122 | addTags(w, "way", false);
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123 | }
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124 | }
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125 |
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126 | public void visit(Relation e) {
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127 | if (e.incomplete) return;
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128 | addCommon(e, "relation");
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129 | if (!withBody) {
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130 | out.println("/>");
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131 | } else {
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132 | out.println(">");
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133 | for (RelationMember em : e.getMembers()) {
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134 | out.print(" <member type='");
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135 | out.print(OsmPrimitiveType.from(em.member).getAPIName());
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136 | out.println("' ref='"+getUsedId(em.member)+"' role='" +
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137 | XmlWriter.encode(em.getRole()) + "' />");
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138 | }
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139 | addTags(e, "relation", false);
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140 | }
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141 | }
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142 |
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143 | public void visit(Changeset cs) {
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144 | addCommon(cs, "changeset");
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145 | out.println(">\n");
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146 | addTags(cs, "changeset", false);
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147 | }
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148 |
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149 | public final void footer(PrintWriter out) {
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150 | out.println("</osm>");
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151 | }
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152 |
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153 | /**
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154 | * Return the id for the given osm primitive (may access the usedId map)
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155 | */
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156 | private long getUsedId(OsmPrimitive osm) {
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157 | if (osm.id != 0)
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158 | return osm.id;
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159 | if (usedNewIds.containsKey(osm))
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160 | return usedNewIds.get(osm);
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161 | usedNewIds.put(osm, newIdCounter);
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162 | return osmConform ? 0 : newIdCounter--;
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163 | }
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164 |
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165 | private void addTags(OsmPrimitive osm, String tagname, boolean tagOpen) {
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166 | if (osm.hasKeys()) {
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167 | if (tagOpen) {
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168 | out.println(">");
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169 | }
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170 | for (Entry<String, String> e : osm.entrySet()) {
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171 | if ((osm instanceof Changeset) || !("created_by".equals(e.getKey())))
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172 | out.println(" <tag k='"+ XmlWriter.encode(e.getKey()) +
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173 | "' v='"+XmlWriter.encode(e.getValue())+ "' />");
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174 | }
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175 | out.println(" </" + tagname + ">");
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176 | } else if (tagOpen) {
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177 | out.println(" />");
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178 | } else {
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179 | out.println(" </" + tagname + ">");
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180 | }
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181 | }
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182 |
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183 | /**
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184 | * Add the common part as the form of the tag as well as the XML attributes
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185 | * id, action, user, and visible.
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186 | */
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187 | private void addCommon(OsmPrimitive osm, String tagname) {
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188 | long id = getUsedId(osm);
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189 | out.print(" <"+tagname);
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190 | if (id != 0) {
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191 | out.print(" id='"+getUsedId(osm)+"'");
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192 | }
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193 | if (!osmConform) {
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194 | String action = null;
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195 | if (osm.deleted) {
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196 | action = "delete";
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197 | } else if (osm.modified) {
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198 | action = "modify";
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199 | }
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200 | if (action != null) {
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201 | out.print(" action='"+action+"'");
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202 | }
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203 | }
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204 | if (!osm.isTimestampEmpty()) {
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205 | out.print(" timestamp='"+DateUtils.fromDate(osm.getTimestamp())+"'");
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206 | }
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207 | // user and visible added with 0.4 API
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208 | if (osm.user != null) {
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209 | out.print(" user='"+XmlWriter.encode(osm.user.name)+"'");
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210 | }
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211 | out.print(" visible='"+osm.visible+"'");
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212 | if (osm.version != -1) {
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213 | out.print(" version='"+osm.version+"'");
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214 | }
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215 | if (this.changeset != null && this.changeset.id != 0) {
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216 | out.print(" changeset='"+this.changeset.id+"'" );
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217 | }
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218 | }
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219 |
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220 | public void close() {
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221 | out.close();
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222 | }
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223 |
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224 | public void flush() {
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225 | out.flush();
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226 | }
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227 | }
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