static {
TEST_ADJACENCY_LIST.add(V1, V2);
TEST_ADJACENCY_LIST.add(V2, V3);
TEST_ADJACENCY_LIST.add(V3, V1);
TEST_ADJACENCY_LIST.add(V3, V4);
TEST_REVERS_ADJACENCY_LIST.add(V2, V1);
TEST_REVERS_ADJACENCY_LIST.add(V3, V2);
TEST_REVERS_ADJACENCY_LIST.add(V1, V3);
TEST_REVERS_ADJACENCY_LIST.add(V4, V3);
TEST_FINISHING_TIME.add(V4);
TEST_FINISHING_TIME.add(V3);
TEST_FINISHING_TIME.add(V2);
TEST_FINISHING_TIME.add(V1);
TEST_LEADER_COTUNTERS.put(V3, new BigInteger("3"));
TEST_LEADER_COTUNTERS.put(V4, new BigInteger("1"));
TEST_RESULT.add(new BigInteger("3"));
TEST_RESULT.add(new BigInteger("1"));
TEST_RESULT.add(new BigInteger("0"));
TEST_RESULT.add(new BigInteger("0"));
TEST_RESULT.add(new BigInteger("0"));
}
@Test
public void testContainsEdge() {
AdjacencyList<String, Integer> myGraph = new AdjacencyList<String, Integer>();
boolean added = myGraph.addEdge("A", "B", new Integer(5));
assertTrue(added);
assertEquals(new Integer(5), myGraph.getEdge("A", "B"));
}
@Test
public void testContainsNode() {
AdjacencyList<String, Integer> myGraph = new AdjacencyList<String, Integer>();
boolean added = myGraph.addNode("B");
assertTrue(added);
assertTrue(myGraph.containsNode("B"));
}
@Test
public void testRemoveConnectedNode() {
AdjacencyList<String, Integer> myGraph = new AdjacencyList<String, Integer>();
boolean added = myGraph.addEdge("A", "B", new Integer(42));
assertTrue(added);
assertTrue(myGraph.adjacent("A", "B"));
myGraph.removeNode("A");
assertFalse(myGraph.adjacent("A", "B"));
}
@Test
public void testGetNodes1Node() {
AdjacencyList<String, Integer> myGraph = new AdjacencyList<String, Integer>();
boolean added = myGraph.addNode("A");
assertTrue(added);
Set<String> allNodes = myGraph.getNodes();
assertEquals(1, allNodes.size());
assertTrue(allNodes.contains("A"));
}
@Test
public void testRemoveEdge() {
AdjacencyList<String, Integer> myGraph = new AdjacencyList<String, Integer>();
boolean added = myGraph.addEdge("A", "B", new Integer(42));
assertTrue(added);
assertTrue(myGraph.adjacent("A", "B"));
Integer edgeRemoved = myGraph.removeEdge("A", "B");
assertEquals(new Integer(42), edgeRemoved);
assertFalse(myGraph.adjacent("A", "B"));
}
@Test
public void testSelfNode() {
AdjacencyList<String, Integer> myGraph = new AdjacencyList<String, Integer>();
boolean added = myGraph.addEdge("A", "A", new Integer(42));
assertFalse(added);
Set<String> allNodes = myGraph.getNodes();
assertEquals(0, allNodes.size());
assertFalse(allNodes.contains("A"));
assertFalse(allNodes.contains("B"));
}
@Test
public void testContains2() {
AdjacencyList<String, Integer> myGraph = new AdjacencyList<String, Integer>();
// contains nodes A and B after adding edge A->B
boolean added = myGraph.addEdge("A", "B", new Integer(42));
assertTrue(added);
assertTrue(myGraph.containsNode("A"));
assertTrue(myGraph.containsNode("B"));
// still contains nodes A and B after removing edge A->B
Integer edgeRemoved = myGraph.removeEdge("A", "B");
assertEquals(new Integer(42), edgeRemoved);
assertTrue(myGraph.containsNode("A"));
assertTrue(myGraph.containsNode("B"));
}
/**
* compute the transitive closure of the input graph
*
* @param <NodeLabel>
* @param <EdgeLabel>
* @param original
* @return
*/
public static <NodeLabel, EdgeLabel> Graph<NodeLabel, EdgeLabel> transitiveClosure(
Graph<NodeLabel, EdgeLabel> input) {
Graph<NodeLabel, EdgeLabel> graph = AdjacencyList.copy(input);
int numChange = 0;
do {
numChange = 0;
for (NodeLabel from : graph.getNodeLabelSet()) {
for (NodeLabel to : graph.getNodeLabelSet()) {
if (graph.hasEdge(from, to)) continue;
int destNodeID = graph.getNodeID(to);
for (Edge startPoint : graph.getOutEdgeSet(from)) {
int intermediateNodeID = startPoint.getDestNodeID();
if (graph.hasEdge(new Edge(intermediateNodeID, destNodeID))) {
graph.addEdge(from, to);
++numChange;
break;
}
}
}
}
} while (numChange > 0);
return graph;
}
@Test
public void testContains3() {
AdjacencyList<String, Integer> myGraph = new AdjacencyList<String, Integer>();
myGraph.addNode("A");
assertTrue(myGraph.containsNode("A"));
assertFalse(myGraph.containsNode("B"));
myGraph.addNode("B");
assertTrue(myGraph.containsNode("A"));
assertTrue(myGraph.containsNode("B"));
myGraph.removeNode("A");
assertFalse(myGraph.containsNode("A"));
assertTrue(myGraph.containsNode("B"));
}
public static void main(String[] args) {
String inputFileName = args[0];
String rootNode = args[1];
AdjacencyList adjacencyList = new AdjacencyList(inputFileName);
nodes.addAll(adjacencyList.getAdjacencyList().keySet());
Map<Node, List<Edge>> list = adjacencyList.getAdjacencyList();
for (Node node : list.keySet()) {
List<Edge> edgeList = list.get(node);
edges.addAll(edgeList);
}
// print header
System.out.println("Node \t Cost \t Next-Hop");
// perform dijkstras for each node as the destination from the root node
Node source = null;
for (Node node : adjacencyList.getAdjacencyList().keySet()) {
if (node.getAddr() == Integer.valueOf(rootNode)) {
source = node;
break;
}
}
if (source != null) {
execute(source);
}
for (Node node : adjacencyList.getAdjacencyList().keySet()) {
if (node.getAddr() != source.getAddr()) {
LinkedList<Node> path = getPath(node);
System.out.println(
node.getAddr() + " \t " + distance.get(node) + " \t " + path.get(1).getAddr());
}
}
}
@Test
public void testNeighbors() {
AdjacencyList<String, Integer> myGraph = new AdjacencyList<String, Integer>();
boolean added = myGraph.addEdge("A", "B", new Integer(42));
assertTrue(added);
added = myGraph.addEdge("B", "C", new Integer(18));
assertTrue(added);
added = myGraph.addEdge("C", "D", new Integer(52));
assertTrue(added);
added = myGraph.addEdge("C", "A", new Integer(18));
assertTrue(added);
Set<String> neighborsOfA = myGraph.neighbors("A");
assertEquals(1, neighborsOfA.size());
assertFalse(neighborsOfA.contains("A"));
assertTrue(neighborsOfA.contains("B"));
assertFalse(neighborsOfA.contains("C"));
assertFalse(neighborsOfA.contains("D"));
Set<String> neighborsOfB = myGraph.neighbors("B");
assertEquals(1, neighborsOfB.size());
assertFalse(neighborsOfB.contains("A"));
assertFalse(neighborsOfB.contains("B"));
assertTrue(neighborsOfB.contains("C"));
assertFalse(neighborsOfB.contains("D"));
Set<String> neighborsOfC = myGraph.neighbors("C");
assertEquals(2, neighborsOfC.size());
assertTrue(neighborsOfC.contains("A"));
assertFalse(neighborsOfC.contains("B"));
assertFalse(neighborsOfC.contains("C"));
assertTrue(neighborsOfC.contains("D"));
Set<String> neighborsOfD = myGraph.neighbors("D");
assertEquals(0, neighborsOfD.size());
assertFalse(neighborsOfD.contains("A"));
assertFalse(neighborsOfD.contains("B"));
assertFalse(neighborsOfD.contains("C"));
assertFalse(neighborsOfD.contains("D"));
}
@Test
public void testNeighborsUnconnected() {
AdjacencyList<String, Integer> myGraph = new AdjacencyList<String, Integer>();
boolean added = myGraph.addNode("A");
assertTrue(added);
added = myGraph.addNode("B");
assertTrue(added);
added = myGraph.addNode("C");
assertTrue(added);
Set<String> neighborsOfA = myGraph.neighbors("A");
assertEquals(0, neighborsOfA.size());
assertFalse(neighborsOfA.contains("A"));
assertFalse(neighborsOfA.contains("B"));
assertFalse(neighborsOfA.contains("C"));
// Neighbors for a node not in the graph
Set<String> neighborsOfD = myGraph.neighbors("D");
assertEquals(0, neighborsOfD.size());
assertFalse(neighborsOfD.contains("A"));
assertFalse(neighborsOfD.contains("B"));
assertFalse(neighborsOfD.contains("C"));
}
@Test
public void testAdjacent() {
AdjacencyList<String, Integer> myGraph = new AdjacencyList<String, Integer>();
// A ; B
myGraph.addNode("A");
myGraph.addNode("B");
assertFalse(myGraph.adjacent("A", "B"));
assertFalse(myGraph.adjacent("B", "A"));
// A -> B
myGraph.addEdge("A", "B", new Integer(18));
assertTrue(myGraph.adjacent("A", "B"));
assertFalse(myGraph.adjacent("B", "A"));
// A -> B ; C
myGraph.addNode("C");
assertTrue(myGraph.adjacent("A", "B"));
assertFalse(myGraph.adjacent("A", "C"));
assertFalse(myGraph.adjacent("B", "A"));
assertFalse(myGraph.adjacent("B", "C"));
assertFalse(myGraph.adjacent("C", "A"));
assertFalse(myGraph.adjacent("C", "B"));
// C -> A -> B
myGraph.addEdge("C", "A", new Integer(42));
assertTrue(myGraph.adjacent("A", "B"));
assertFalse(myGraph.adjacent("A", "C"));
assertFalse(myGraph.adjacent("B", "A"));
assertFalse(myGraph.adjacent("B", "C"));
assertTrue(myGraph.adjacent("C", "A"));
assertFalse(myGraph.adjacent("C", "B"));
}