1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.data.osm;
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3 |
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4 | import org.openstreetmap.josm.Main;
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5 | import org.openstreetmap.josm.data.coor.EastNorth;
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6 | import org.openstreetmap.josm.data.coor.LatLon;
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7 | import org.openstreetmap.josm.data.osm.visitor.PrimitiveVisitor;
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8 | import org.openstreetmap.josm.data.osm.visitor.Visitor;
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9 | import org.openstreetmap.josm.data.projection.Projections;
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10 |
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11 | /**
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12 | * One node data, consisting of one world coordinate waypoint.
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13 | *
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14 | * @author imi
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15 | */
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16 | public final class Node extends OsmPrimitive implements INode {
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17 |
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18 | /*
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19 | * We "inline" lat/lon rather than using a LatLon-object => reduces memory footprint
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20 | */
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21 | private double lat = Double.NaN;
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22 | private double lon = Double.NaN;
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23 |
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24 | /*
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25 | * the cached projected coordinates
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26 | */
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27 | private double east = Double.NaN;
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28 | private double north = Double.NaN;
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29 |
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30 | private boolean isLatLonKnown() {
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31 | return !Double.isNaN(lat) && !Double.isNaN(lon);
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32 | }
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33 |
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34 | @Override
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35 | public final void setCoor(LatLon coor) {
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36 | updateCoor(coor, null);
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37 | }
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38 |
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39 | @Override
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40 | public final void setEastNorth(EastNorth eastNorth) {
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41 | updateCoor(null, eastNorth);
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42 | }
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43 |
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44 | private void updateCoor(LatLon coor, EastNorth eastNorth) {
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45 | if (getDataSet() != null) {
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46 | boolean locked = writeLock();
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47 | try {
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48 | getDataSet().fireNodeMoved(this, coor, eastNorth);
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49 | } finally {
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50 | writeUnlock(locked);
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51 | }
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52 | } else {
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53 | setCoorInternal(coor, eastNorth);
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54 | }
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55 | }
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56 |
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57 | @Override
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58 | public final LatLon getCoor() {
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59 | if (!isLatLonKnown()) return null;
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60 | return new LatLon(lat,lon);
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61 | }
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62 |
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63 | /**
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64 | * <p>Replies the projected east/north coordinates.</p>
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65 | *
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66 | * <p>Uses the {@link Main#getProjection() global projection} to project the lan/lon-coordinates.
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67 | * Internally caches the projected coordinates.</p>
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68 | *
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69 | * <p><strong>Caveat:</strong> doesn't listen to projection changes. Clients must
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70 | * {@link #invalidateEastNorthCache() invalidate the internal cache}.</p>
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71 | *
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72 | * <p>Replies {@code null} if this node doesn't know lat/lon-coordinates, i.e. because it is an incomplete node.
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73 | *
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74 | * @return the east north coordinates or {@code null}
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75 | * @see #invalidateEastNorthCache()
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76 | *
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77 | */
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78 | @Override
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79 | public final EastNorth getEastNorth() {
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80 | if (!isLatLonKnown()) return null;
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81 |
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82 | if (getDataSet() == null)
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83 | // there is no dataset that listens for projection changes
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84 | // and invalidates the cache, so we don't use the cache at all
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85 | return Projections.project(new LatLon(lat, lon));
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86 |
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87 | if (Double.isNaN(east) || Double.isNaN(north)) {
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88 | // projected coordinates haven't been calculated yet,
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89 | // so fill the cache of the projected node coordinates
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90 | EastNorth en = Projections.project(new LatLon(lat, lon));
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91 | this.east = en.east();
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92 | this.north = en.north();
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93 | }
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94 | return new EastNorth(east, north);
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95 | }
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96 |
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97 | /**
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98 | * To be used only by Dataset.reindexNode
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99 | */
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100 | protected void setCoorInternal(LatLon coor, EastNorth eastNorth) {
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101 | if (coor != null) {
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102 | this.lat = coor.lat();
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103 | this.lon = coor.lon();
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104 | invalidateEastNorthCache();
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105 | } else if (eastNorth != null) {
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106 | LatLon ll = Projections.inverseProject(eastNorth);
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107 | this.lat = ll.lat();
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108 | this.lon = ll.lon();
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109 | this.east = eastNorth.east();
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110 | this.north = eastNorth.north();
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111 | } else {
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112 | this.lat = Double.NaN;
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113 | this.lon = Double.NaN;
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114 | invalidateEastNorthCache();
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115 | if (isVisible()) {
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116 | setIncomplete(true);
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117 | }
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118 | }
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119 | }
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120 |
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121 | protected Node(long id, boolean allowNegative) {
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122 | super(id, allowNegative);
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123 | }
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124 |
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125 | /**
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126 | * Constructs a new local {@code Node} with id 0.
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127 | */
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128 | public Node() {
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129 | this(0, false);
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130 | }
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131 |
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132 | /**
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133 | * Constructs an incomplete {@code Node} object with the given id.
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134 | * @param id The id. Must be >= 0
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135 | * @throws IllegalArgumentException if id < 0
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136 | */
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137 | public Node(long id) throws IllegalArgumentException {
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138 | super(id, false);
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139 | }
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140 |
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141 | /**
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142 | * Constructs a new {@code Node} with the given id and version.
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143 | * @param id The id. Must be >= 0
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144 | * @param version The version
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145 | * @throws IllegalArgumentException if id < 0
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146 | */
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147 | public Node(long id, int version) throws IllegalArgumentException {
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148 | super(id, version, false);
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149 | }
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150 |
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151 | /**
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152 | * Constructs an identical clone of the argument.
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153 | * @param clone The node to clone
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154 | * @param clearMetadata If {@code true}, clears the OSM id and other metadata as defined by {@link #clearOsmMetadata}. If {@code false}, does nothing
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155 | */
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156 | public Node(Node clone, boolean clearMetadata) {
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157 | super(clone.getUniqueId(), true /* allow negative IDs */);
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158 | cloneFrom(clone);
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159 | if (clearMetadata) {
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160 | clearOsmMetadata();
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161 | }
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162 | }
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163 |
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164 | /**
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165 | * Constructs an identical clone of the argument (including the id).
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166 | * @param clone The node to clone, including its id
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167 | */
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168 | public Node(Node clone) {
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169 | this(clone, false);
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170 | }
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171 |
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172 | /**
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173 | * Constructs a new {@code Node} with the given lat/lon with id 0.
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174 | * @param latlon The {@link LatLon} coordinates
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175 | */
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176 | public Node(LatLon latlon) {
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177 | super(0, false);
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178 | setCoor(latlon);
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179 | }
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180 |
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181 | /**
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182 | * Constructs a new {@code Node} with the given east/north with id 0.
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183 | * @param eastNorth The {@link EastNorth} coordinates
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184 | */
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185 | public Node(EastNorth eastNorth) {
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186 | super(0, false);
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187 | setEastNorth(eastNorth);
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188 | }
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189 |
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190 | @Override
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191 | void setDataset(DataSet dataSet) {
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192 | super.setDataset(dataSet);
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193 | if (!isIncomplete() && isVisible() && (getCoor() == null || getEastNorth() == null))
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194 | throw new DataIntegrityProblemException("Complete node with null coordinates: " + toString());
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195 | }
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196 |
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197 | @Override
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198 | public void accept(Visitor visitor) {
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199 | visitor.visit(this);
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200 | }
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201 |
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202 | @Override
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203 | public void accept(PrimitiveVisitor visitor) {
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204 | visitor.visit(this);
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205 | }
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206 |
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207 | @Override
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208 | public void cloneFrom(OsmPrimitive osm) {
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209 | boolean locked = writeLock();
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210 | try {
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211 | super.cloneFrom(osm);
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212 | setCoor(((Node)osm).getCoor());
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213 | } finally {
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214 | writeUnlock(locked);
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215 | }
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216 | }
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217 |
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218 | /**
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219 | * Merges the technical and semantical attributes from <code>other</code> onto this.
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220 | *
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221 | * Both this and other must be new, or both must be assigned an OSM ID. If both this and <code>other</code>
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222 | * have an assigend OSM id, the IDs have to be the same.
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223 | *
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224 | * @param other the other primitive. Must not be null.
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225 | * @throws IllegalArgumentException thrown if other is null.
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226 | * @throws DataIntegrityProblemException thrown if either this is new and other is not, or other is new and this is not
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227 | * @throws DataIntegrityProblemException thrown if other is new and other.getId() != this.getId()
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228 | */
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229 | @Override
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230 | public void mergeFrom(OsmPrimitive other) {
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231 | boolean locked = writeLock();
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232 | try {
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233 | super.mergeFrom(other);
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234 | if (!other.isIncomplete()) {
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235 | setCoor(((Node)other).getCoor());
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236 | }
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237 | } finally {
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238 | writeUnlock(locked);
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239 | }
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240 | }
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241 |
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242 | @Override public void load(PrimitiveData data) {
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243 | boolean locked = writeLock();
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244 | try {
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245 | super.load(data);
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246 | setCoor(((NodeData)data).getCoor());
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247 | } finally {
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248 | writeUnlock(locked);
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249 | }
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250 | }
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251 |
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252 | @Override public NodeData save() {
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253 | NodeData data = new NodeData();
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254 | saveCommonAttributes(data);
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255 | if (!isIncomplete()) {
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256 | data.setCoor(getCoor());
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257 | }
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258 | return data;
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259 | }
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260 |
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261 | @Override
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262 | public String toString() {
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263 | String coorDesc = isLatLonKnown() ? "lat="+lat+",lon="+lon : "";
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264 | return "{Node id=" + getUniqueId() + " version=" + getVersion() + " " + getFlagsAsString() + " " + coorDesc+"}";
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265 | }
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266 |
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267 | @Override
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268 | public boolean hasEqualSemanticAttributes(OsmPrimitive other) {
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269 | if (!(other instanceof Node))
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270 | return false;
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271 | if (! super.hasEqualSemanticAttributes(other))
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272 | return false;
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273 | Node n = (Node)other;
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274 | LatLon coor = getCoor();
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275 | LatLon otherCoor = n.getCoor();
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276 | if (coor == null && otherCoor == null)
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277 | return true;
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278 | else if (coor != null && otherCoor != null)
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279 | return coor.equalsEpsilon(otherCoor);
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280 | else
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281 | return false;
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282 | }
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283 |
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284 | @Override
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285 | public int compareTo(OsmPrimitive o) {
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286 | return o instanceof Node ? Long.valueOf(getUniqueId()).compareTo(o.getUniqueId()) : 1;
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287 | }
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288 |
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289 | @Override
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290 | public String getDisplayName(NameFormatter formatter) {
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291 | return formatter.format(this);
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292 | }
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293 |
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294 | @Override
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295 | public OsmPrimitiveType getType() {
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296 | return OsmPrimitiveType.NODE;
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297 | }
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298 |
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299 | @Override
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300 | public BBox getBBox() {
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301 | return new BBox(this);
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302 | }
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303 |
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304 | @Override
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305 | public void updatePosition() {
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306 | }
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307 |
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308 | @Override
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309 | public boolean isDrawable() {
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310 | // Not possible to draw a node without coordinates.
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311 | return super.isDrawable() && isLatLonKnown();
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312 | }
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313 |
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314 | /**
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315 | * Check whether this node connects 2 ways.
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316 | *
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317 | * @return true if isReferredByWays(2) returns true
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318 | * @see #isReferredByWays(int)
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319 | */
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320 | public boolean isConnectionNode() {
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321 | return isReferredByWays(2);
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322 | }
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323 |
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324 | /**
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325 | * Invoke to invalidate the internal cache of projected east/north coordinates.
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326 | * Coordinates are reprojected on demand when the {@link #getEastNorth()} is invoked
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327 | * next time.
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328 | */
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329 | public void invalidateEastNorthCache() {
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330 | this.east = Double.NaN;
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331 | this.north = Double.NaN;
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332 | }
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333 |
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334 | @Override
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335 | public boolean concernsArea() {
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336 | // A node cannot be an area
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337 | return false;
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338 | }
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339 | }
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