1 | // License: GPL. Copyright 2007 by Immanuel Scholz and others
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2 | package org.openstreetmap.josm.data.osm;
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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.util.ArrayList;
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7 | import java.util.Arrays;
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8 | import java.util.Collection;
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9 | import java.util.List;
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10 |
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11 | import org.openstreetmap.josm.data.osm.visitor.Visitor;
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12 | import org.openstreetmap.josm.tools.CopyList;
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13 | import org.openstreetmap.josm.tools.Pair;
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14 |
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15 | /**
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16 | * One full way, consisting of a list of way nodes.
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17 | *
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18 | * @author imi
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19 | */
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20 | public final class Way extends OsmPrimitive {
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21 |
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22 | /**
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23 | * All way nodes in this way
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24 | *
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25 | */
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26 | private Node[] nodes = new Node[0];
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27 |
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28 | /**
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29 | *
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30 | * You can modify returned list but changes will not be propagated back
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31 | * to the Way. Use {@link #setNodes(List)} to update this way
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32 | * @return Nodes composing the way
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33 | * @since 1862
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34 | */
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35 | public List<Node> getNodes() {
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36 | return new CopyList<Node>(nodes);
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37 | }
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38 |
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39 | /**
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40 | * Set new list of nodes to way. This method is preferred to multiple calls to addNode/removeNode
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41 | * and similar methods because nodes are internally saved as array which means lower memory overhead
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42 | * but also slower modifying operations.
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43 | * @param nodes New way nodes. Can be null, in that case all way nodes are removed
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44 | * @since 1862
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45 | */
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46 | public void setNodes(List<Node> nodes) {
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47 | if (nodes == null) {
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48 | this.nodes = new Node[0];
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49 | } else {
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50 | this.nodes = nodes.toArray(new Node[nodes.size()]);
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51 | }
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52 | clearCached();
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53 | }
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54 |
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55 | /**
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56 | * Replies the number of nodes in this ways.
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57 | *
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58 | * @return the number of nodes in this ways.
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59 | * @since 1862
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60 | */
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61 | public int getNodesCount() {
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62 | return nodes.length;
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63 | }
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64 |
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65 | /**
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66 | * Replies the node at position <code>index</code>.
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67 | *
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68 | * @param index the position
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69 | * @return the node at position <code>index</code>
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70 | * @exception IndexOutOfBoundsException thrown if <code>index</code> < 0
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71 | * or <code>index</code> >= {@see #getNodesCount()}
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72 | * @since 1862
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73 | */
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74 | public Node getNode(int index) {
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75 | return nodes[index];
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76 | }
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77 |
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78 | /**
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79 | * Replies true if this way contains the node <code>node</code>, false
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80 | * otherwise. Replies false if <code>node</code> is null.
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81 | *
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82 | * @param node the node. May be null.
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83 | * @return true if this way contains the node <code>node</code>, false
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84 | * otherwise
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85 | * @since 1909
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86 | */
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87 | public boolean containsNode(Node node) {
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88 | if (node == null) return false;
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89 | for (int i=0; i<nodes.length; i++) {
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90 | if (nodes[i].equals(node))
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91 | return true;
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92 | }
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93 | return false;
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94 | }
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95 |
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96 | /* mappaint data */
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97 | public boolean isMappaintArea = false;
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98 | public Integer mappaintDrawnAreaCode = 0;
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99 | /* end of mappaint data */
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100 | @Override protected void clearCached() {
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101 | super.clearCached();
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102 | isMappaintArea = false;
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103 | mappaintDrawnAreaCode = 0;
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104 | }
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105 |
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106 | public ArrayList<Pair<Node,Node>> getNodePairs(boolean sort) {
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107 | ArrayList<Pair<Node,Node>> chunkSet = new ArrayList<Pair<Node,Node>>();
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108 | if (incomplete) return chunkSet;
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109 | Node lastN = null;
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110 | for (Node n : this.nodes) {
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111 | if (lastN == null) {
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112 | lastN = n;
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113 | continue;
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114 | }
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115 | Pair<Node,Node> np = new Pair<Node,Node>(lastN, n);
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116 | if (sort) {
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117 | Pair.sort(np);
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118 | }
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119 | chunkSet.add(np);
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120 | lastN = n;
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121 | }
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122 | return chunkSet;
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123 | }
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124 |
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125 |
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126 | @Override public void visit(Visitor visitor) {
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127 | visitor.visit(this);
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128 | }
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129 |
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130 | /**
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131 | * Creates a new way with id 0.
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132 | *
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133 | */
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134 | public Way(){
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135 | super(0);
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136 | }
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137 |
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138 | /**
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139 | * Create an identical clone of the argument (including the id).
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140 | *
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141 | * @param original the original way. Must not be null.
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142 | */
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143 | public Way(Way original) {
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144 | super(original.getId());
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145 | cloneFrom(original);
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146 | }
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147 |
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148 | /**
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149 | * Creates a new way for the given id. If the id > 0, the way is marked
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150 | * as incomplete.
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151 | *
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152 | * @param id the id. > 0 required
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153 | * @throws IllegalArgumentException thrown if id < 0
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154 | */
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155 | public Way(long id) throws IllegalArgumentException {
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156 | super(id);
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157 | }
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158 |
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159 | @Override public void cloneFrom(OsmPrimitive osm) {
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160 | super.cloneFrom(osm);
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161 | Way otherWay = (Way)osm;
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162 | nodes = new Node[otherWay.nodes.length];
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163 | System.arraycopy(otherWay.nodes, 0, nodes, 0, otherWay.nodes.length);
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164 | }
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165 |
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166 | @Override public String toString() {
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167 | if (incomplete) return "{Way id="+getId()+" version="+getVersion()+" (incomplete)}";
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168 | return "{Way id="+getId()+" version="+getVersion()+" nodes="+Arrays.toString(nodes)+"}";
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169 | }
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170 |
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171 | @Override
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172 | public boolean hasEqualSemanticAttributes(OsmPrimitive other) {
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173 | if (other == null || ! (other instanceof Way) )
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174 | return false;
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175 | if (! super.hasEqualSemanticAttributes(other))
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176 | return false;
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177 | Way w = (Way)other;
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178 | return Arrays.equals(nodes, w.nodes);
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179 | }
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180 |
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181 | public int compareTo(OsmPrimitive o) {
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182 | if (o instanceof Relation)
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183 | return 1;
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184 | return o instanceof Way ? Long.valueOf(getId()).compareTo(o.getId()) : -1;
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185 | }
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186 |
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187 | public void removeNode(Node n) {
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188 | if (incomplete) return;
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189 | boolean closed = (lastNode() == n && firstNode() == n);
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190 | int i;
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191 | List<Node> copy = getNodes();
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192 | while ((i = copy.indexOf(n)) >= 0) {
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193 | copy.remove(i);
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194 | }
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195 | i = copy.size();
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196 | if (closed && i > 2) {
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197 | addNode(firstNode());
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198 | } else if (i >= 2 && i <= 3 && copy.get(0) == copy.get(i-1)) {
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199 | copy.remove(i-1);
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200 | }
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201 | setNodes(copy);
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202 | }
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203 |
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204 | public void removeNodes(Collection<? extends OsmPrimitive> selection) {
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205 | if (incomplete) return;
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206 | for(OsmPrimitive p : selection) {
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207 | if (p instanceof Node) {
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208 | removeNode((Node)p);
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209 | }
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210 | }
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211 | }
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212 |
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213 | /**
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214 | * Adds a node to the end of the list of nodes. Ignored, if n is null.
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215 | *
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216 | * @param n the node. Ignored, if null.
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217 | * @throws IllegalStateException thrown, if this way is marked as incomplete. We can't add a node
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218 | * to an incomplete way
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219 | */
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220 | public void addNode(Node n) throws IllegalStateException {
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221 | if (n==null) return;
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222 | if (incomplete)
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223 | throw new IllegalStateException(tr("Cannot add node {0} to incomplete way {1}.", n.getId(), getId()));
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224 | clearCached();
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225 | Node[] newNodes = new Node[nodes.length + 1];
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226 | System.arraycopy(nodes, 0, newNodes, 0, nodes.length);
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227 | newNodes[nodes.length] = n;
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228 | nodes = newNodes;
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229 | }
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230 |
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231 | /**
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232 | * Adds a node at position offs.
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233 | *
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234 | * @param int offs the offset
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235 | * @param n the node. Ignored, if null.
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236 | * @throws IllegalStateException thrown, if this way is marked as incomplete. We can't add a node
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237 | * to an incomplete way
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238 | * @throws IndexOutOfBoundsException thrown if offs is out of bounds
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239 | */
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240 | public void addNode(int offs, Node n) throws IllegalStateException, IndexOutOfBoundsException {
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241 | if (n==null) return;
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242 | if (incomplete)
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243 | throw new IllegalStateException(tr("Cannot add node {0} to incomplete way {1}.", n.getId(), getId()));
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244 | clearCached();
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245 | Node[] newNodes = new Node[nodes.length + 1];
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246 | System.arraycopy(nodes, 0, newNodes, 0, offs);
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247 | System.arraycopy(nodes, offs, newNodes, offs + 1, nodes.length - offs);
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248 | newNodes[offs] = n;
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249 | nodes = newNodes;
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250 | }
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251 |
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252 | public boolean isClosed() {
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253 | if (incomplete) return false;
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254 | return nodes.length >= 3 && lastNode() == firstNode();
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255 | }
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256 |
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257 | public Node lastNode() {
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258 | if (incomplete || nodes.length == 0) return null;
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259 | return nodes[nodes.length-1];
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260 | }
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261 |
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262 | public Node firstNode() {
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263 | if (incomplete || nodes.length == 0) return null;
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264 | return nodes[0];
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265 | }
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266 |
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267 | public boolean isFirstLastNode(Node n) {
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268 | if (incomplete || nodes.length == 0) return false;
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269 | return n == firstNode() || n == lastNode();
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270 | }
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271 |
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272 | @Override
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273 | public String getDisplayName(NameFormatter formatter) {
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274 | return formatter.format(this);
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275 | }
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276 | }
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