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);
}
}

128
src/test/org/insa/graph/GraphTest.java Normal file
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@@ -0,0 +1,128 @@
package org.insa.graph;
import static org.junit.Assert.assertEquals;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.insa.graph.RoadInformation.RoadType;
import org.junit.BeforeClass;
import org.junit.Test;
public class GraphTest {
// Small graph use for tests
private static Graph graph;
// List of nodes
private static Node[] nodes;
@BeforeClass
public static void initAll() throws IOException {
// Create nodes
nodes = new Node[5];
for (int i = 0; i < nodes.length; ++i) {
nodes[i] = new Node(i, null);
}
Node.linkNodes(nodes[0], nodes[1], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, false, 1, null),
new ArrayList<>());
Node.linkNodes(nodes[0], nodes[2], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, false, 1, null),
new ArrayList<>());
Node.linkNodes(nodes[0], nodes[4], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, true, 1, null), new ArrayList<>());
Node.linkNodes(nodes[1], nodes[2], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, false, 1, null),
new ArrayList<>());
Node.linkNodes(nodes[2], nodes[3], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, true, 1, null), new ArrayList<>());
Node.linkNodes(nodes[2], nodes[3], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, true, 1, null), new ArrayList<>());
Node.linkNodes(nodes[2], nodes[3], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, true, 1, null), new ArrayList<>());
Node.linkNodes(nodes[3], nodes[0], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, false, 1, null),
new ArrayList<>());
Node.linkNodes(nodes[3], nodes[4], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, true, 1, null), new ArrayList<>());
Node.linkNodes(nodes[4], nodes[0], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, true, 1, null), new ArrayList<>());
graph = new Graph("ID", "", Arrays.asList(nodes), null);
}
/**
* @return List of arcs between a and b.
*/
private List<Arc> getArcsBetween(Node a, Node b) {
List<Arc> arcs = new ArrayList<>();
for (Arc arc: a.getSuccessors()) {
if (arc.getDestination().equals(b)) {
arcs.add(arc);
}
}
return arcs;
}
@Test
public void testTranspose() {
Graph transpose = graph.transpose();
// Basic asserts...
assertEquals("R/" + graph.getMapId(), transpose.getMapId());
assertEquals(graph.getNodes().size(), transpose.getNodes().size());
final int expNbSucc[] = { 4, 2, 2, 4, 2 };
for (int i = 0; i < expNbSucc.length; ++i) {
assertEquals(expNbSucc[i], transpose.getNodes().get(i).getSuccessors().size());
}
assertEquals(
getArcsBetween(transpose.getNodes().get(0), transpose.getNodes().get(1)).size(), 1);
assertEquals(
getArcsBetween(transpose.getNodes().get(0), transpose.getNodes().get(2)).size(), 1);
assertEquals(
getArcsBetween(transpose.getNodes().get(0), transpose.getNodes().get(3)).size(), 1);
assertEquals(
getArcsBetween(transpose.getNodes().get(0), transpose.getNodes().get(4)).size(), 1);
assertEquals(
getArcsBetween(transpose.getNodes().get(1), transpose.getNodes().get(0)).size(), 1);
assertEquals(
getArcsBetween(transpose.getNodes().get(1), transpose.getNodes().get(2)).size(), 1);
assertEquals(
getArcsBetween(transpose.getNodes().get(1), transpose.getNodes().get(3)).size(), 0);
assertEquals(
getArcsBetween(transpose.getNodes().get(1), transpose.getNodes().get(4)).size(), 0);
assertEquals(
getArcsBetween(transpose.getNodes().get(2), transpose.getNodes().get(0)).size(), 1);
assertEquals(
getArcsBetween(transpose.getNodes().get(2), transpose.getNodes().get(1)).size(), 1);
assertEquals(
getArcsBetween(transpose.getNodes().get(2), transpose.getNodes().get(3)).size(), 0);
assertEquals(
getArcsBetween(transpose.getNodes().get(2), transpose.getNodes().get(4)).size(), 0);
assertEquals(
getArcsBetween(transpose.getNodes().get(3), transpose.getNodes().get(0)).size(), 1);
assertEquals(
getArcsBetween(transpose.getNodes().get(3), transpose.getNodes().get(1)).size(), 0);
assertEquals(
getArcsBetween(transpose.getNodes().get(3), transpose.getNodes().get(2)).size(), 3);
assertEquals(
getArcsBetween(transpose.getNodes().get(3), transpose.getNodes().get(4)).size(), 0);
assertEquals(
getArcsBetween(transpose.getNodes().get(4), transpose.getNodes().get(0)).size(), 1);
assertEquals(
getArcsBetween(transpose.getNodes().get(4), transpose.getNodes().get(1)).size(), 0);
assertEquals(
getArcsBetween(transpose.getNodes().get(4), transpose.getNodes().get(2)).size(), 0);
assertEquals(
getArcsBetween(transpose.getNodes().get(4), transpose.getNodes().get(3)).size(), 1);
}
}

77
src/test/org/insa/graph/NodeTest.java Normal file
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@@ -0,0 +1,77 @@
package org.insa.graph;
import static org.junit.Assert.assertEquals;
import java.io.IOException;
import java.util.ArrayList;
import org.insa.graph.RoadInformation.RoadType;
import org.junit.Before;
import org.junit.Test;
public class NodeTest {
// List of nodes
private Node[] nodes;
@Before
public void initAll() throws IOException {
// Create nodes
nodes = new Node[5];
for (int i = 0; i < nodes.length; ++i) {
nodes[i] = new Node(i, null);
}
Node.linkNodes(nodes[0], nodes[1], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, false, 1, null),
new ArrayList<>());
Node.linkNodes(nodes[0], nodes[2], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, false, 1, null),
new ArrayList<>());
Node.linkNodes(nodes[0], nodes[4], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, true, 1, null), new ArrayList<>());
Node.linkNodes(nodes[1], nodes[2], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, false, 1, null),
new ArrayList<>());
Node.linkNodes(nodes[2], nodes[3], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, true, 1, null), new ArrayList<>());
Node.linkNodes(nodes[2], nodes[3], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, true, 1, null), new ArrayList<>());
Node.linkNodes(nodes[2], nodes[3], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, true, 1, null), new ArrayList<>());
Node.linkNodes(nodes[3], nodes[0], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, false, 1, null),
new ArrayList<>());
Node.linkNodes(nodes[3], nodes[4], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, true, 1, null), new ArrayList<>());
Node.linkNodes(nodes[4], nodes[0], 0,
new RoadInformation(RoadType.UNCLASSIFIED, null, true, 1, null), new ArrayList<>());
}
/**
* @return The first arc between from a to b, or null.
*/
private Arc getFirstArcBetween(Node a, Node b) {
for (Arc arc: a.getSuccessors()) {
if (arc.getDestination().equals(b)) {
return arc;
}
}
return null;
}
@Test
public void testLinkNodes() {
final int[] expNbSucc = { 4, 2, 5, 2, 1 };
assertEquals(nodes.length, expNbSucc.length);
for (int i = 0; i < expNbSucc.length; ++i) {
assertEquals(nodes[i].getSuccessors().size(), expNbSucc[i]);
}
assertEquals(getFirstArcBetween(nodes[0], nodes[1]).getRoadInformation(),
getFirstArcBetween(nodes[1], nodes[0]).getRoadInformation());
}
}