INSA/be-graphes
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Code Issues 4 Releases Wiki Activity

Add code to transpose graph.

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This commit is contained in:
Holt59
2018-03-12 20:58:35 +01:00
parent 95b68f3e31
commit 19220dc8a4
3 changed files with 228 additions and 2 deletions
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25
src/main/org/insa/graph/Graph.java
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@@ -1,5 +1,6 @@
package org.insa.graph;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
@@ -71,8 +72,28 @@ public class Graph {
* @return Transpose graph of this graph.
*/
public Graph transpose() {
// TODO:
return null;
ArrayList<Node> trNodes = new ArrayList<>(nodes.size());
for (Node node: nodes) {
trNodes.add(new Node(node.getId(), node.getPoint()));
}
for (Node node: nodes) {
Node orig = trNodes.get(node.getId());
for (Arc arc: node.getSuccessors()) {
if (arc.getRoadInformation().isOneWay()) {
Node dest = trNodes.get(arc.getDestination().getId());
dest.addSuccessor(new ArcBackward(new ArcForward(orig, dest, arc.getLength(),
arc.getRoadInformation(), arc.getPoints())));
}
else if (arc instanceof ArcForward) {
Node dest = trNodes.get(arc.getDestination().getId());
Arc newArc = new ArcForward(orig, dest, arc.getLength(),
arc.getRoadInformation(), arc.getPoints());
dest.addSuccessor(new ArcBackward(newArc));
orig.addSuccessor(newArc);
}
}
}
return new Graph("R/" + mapId, mapName, trNodes, graphStatistics);
}
}