@Override
public Graph transform(Graph g) {
System.err.println("This is not working completely yet, so don't expect good results!");
initIDSpace(g);
/*
* Phase 1
*/
Node currentNode = null;
List<Node> nodeList = Arrays.asList(g.getNodes());
List<Edge> removalList = new ArrayList<Edge>();
Collections.sort(nodeList, new NodeDegreeComparator());
for (int counter = 1; counter < (nodeList.size() - 3); counter++) {
Boolean selectedANodeForThisIteration = false;
if (currentNode != null) {
// try to get a wave front / wave center node
}
if (!selectedANodeForThisIteration) {
// We got no node yet - choose one with lowest degree
currentNode = nodeList.get(0);
}
List<Edge> establishedEdges = getPairEdges(currentNode);
}
for (Node n : nodeList) System.out.println(n + " has degree " + n.getDegree());
// countAllCrossings(g);
writeIDSpace(g);
return g;
}
private List<Edge> getPairEdges(Node n) {
List<Edge> result = new ArrayList<Edge>();
int[] incomingEdges = n.getIncomingEdges();
for (int eDst : incomingEdges) {
if (isPairEdge(n.getIndex(), eDst)) result.add(new Edge(n.getIndex(), eDst));
}
return result;
}
/**
* returns the list of neighbors as candidates
*
* @param g Graph
* @param n Current node
* @return List of candidates
*/
@Override
public List<Node> resolveCandidates(Graph g, Node n) {
int[] nids = n.getOutgoingEdges();
ArrayList<Node> nn = new ArrayList<Node>();
for (int i : nids) {
nn.add(g.getNode(i));
}
return nn;
}
/*
* (non-Javadoc)
*
* @see gtna.io.graphReader.GraphReader#read(java.lang.String)
*/
@Override
public Graph read(String filename) {
String sep1 = Config.get("SNAP_SEPARATOR_1");
String ffd = Config.get("FILESYSTEM_FOLDER_DELIMITER");
SNAPFileReader fr = new SNAPFileReader(filename);
try {
String line = null;
String name = filename.substring(filename.lastIndexOf(ffd) + 1);
Graph graph = new Graph(name);
Map<Integer, Integer> idMapping = new HashMap<Integer, Integer>();
int nodecounter = 0;
LinkedList<String> edges = new LinkedList<String>();
graphtype type = null;
line = fr.readLine();
type = (line.contains("Directed graph")) ? graphtype.DIRECTED : graphtype.UNDIRECTED;
while (!line.contains("FromNodeId") && !line.contains("ToNodeId")) {
line = fr.readLine();
}
nodecounter = parseEdges(sep1, fr, idMapping, nodecounter, edges, type);
Node[] nodes = Node.init(idMapping.size(), graph);
Edges e = new Edges(nodes, edges.size());
ListIterator<String> edgeIterator = edges.listIterator();
while (edgeIterator.hasNext()) {
String[] pair = edgeIterator.next().split("-");
e.add(Integer.parseInt(pair[0]), Integer.parseInt(pair[1]));
}
e.fill();
graph.setNodes(nodes);
return graph;
} catch (Exception e) {
return null;
} finally {
fr.close();
}
}
@Override
public Graph read(String filename) {
String delimiter = Config.get("GRAPH_WRITER_DELIMITER");
Filereader fr = new Filereader(filename);
String name = fr.readLine();
int N = Integer.parseInt(fr.readLine());
int E = Integer.parseInt(fr.readLine());
Graph graph = new Graph(name);
Node[] nodes = Node.init(N, graph);
Edges edges = new Edges(nodes, E);
String line = null;
while ((line = fr.readLine()) != null) {
String[] temp = line.split(delimiter);
edges.add(Integer.parseInt(temp[0]), Integer.parseInt(temp[1]));
}
edges.fill();
graph.setNodes(nodes);
fr.close();
return graph;
}
public static Graph read(String filename) throws Exception {
Timer timer = new Timer();
RandomAccessFile file = new RandomAccessFile(new File(filename), "r");
// seek to names
while (!file.readLine().startsWith("names/")) {}
// read names
Vector<WOTNode> wotNodes = new Vector<WOTNode>();
int index = 0;
String line;
while (!(line = file.readLine()).startsWith("keys/")) {
if (!line.equals("")) {
WOTNode node = new WOTNode(index, line);
wotNodes.add(node);
index += 1;
}
}
// read keys
for (index = 0; index < wotNodes.size(); index++) {
byte[] key = new byte[4];
file.read(key);
WOTNode node = wotNodes.get(index);
node.key = Util.toInt(key);
}
// skip the "signatures/" line
String signaturesLine = file.readLine();
if (!signaturesLine.startsWith("signatures/")) {
// FIXME an IllegalArgumentException isn't really semantically
// correct
throw new IllegalArgumentException("A line starting with \"signatures/\" was expected.");
}
// read signatures
for (index = 0; index < wotNodes.size(); index++) {
WOTNode node = wotNodes.get(index);
// read how many keys are signed by this key
byte[] buffer = new byte[4];
file.read(buffer);
int signatureCount = Util.toInt(buffer);
// inspect all signatures
for (int signatureIndex = 0; signatureIndex < signatureCount; signatureIndex++) {
byte[] signatureBuffer = new byte[4];
file.read(signatureBuffer);
int signature = Util.toInt(signatureBuffer);
// get the signature type
// TODO do something with the signature type
// int signatureType = signature & SIGNATURE_TYPE_MASK;
// get the target key
int targetIndex = signature & SIGNATURE_INDEX_MASK;
if (targetIndex >= wotNodes.size()) {
// FIXME an IllegalArgumentException isn't really
// semantically correct
throw new IllegalArgumentException("A target index that matches a node was expected.");
}
// retrieve the target node
WOTNode target = wotNodes.get(targetIndex);
node.signatures.add(target);
}
}
// skip the "debug/" line
String debugLine = file.readLine();
if (!debugLine.startsWith("debug/")) {
// FIXME an IllegalArgumentException isn't really semantically
// correct
throw new IllegalArgumentException("A line starting with \"debug/was expected.");
}
file.close();
timer.end();
// prepare return graph
Graph graph = new Graph("WOT - read from " + filename);
Node[] nodes = Node.init(wotNodes.size(), graph);
Edges edges = new Edges(nodes, nodes.length);
for (WOTNode source : wotNodes) {
for (WOTNode target : source.signatures) {
edges.add(source.index, target.index);
}
}
edges.fill();
graph.setNodes(nodes);
return graph;
}
@Override
public int compare(Node n1, Node n2) {
double n1ID = partitions[n1.getIndex()].getStart().getPosition();
double n2ID = partitions[n2.getIndex()].getStart().getPosition();
return Double.compare(n1ID, n2ID);
}
@Override
public int compare(Node n1, Node n2) {
if (n1.getDegree() == n2.getDegree()) return 0;
else if (n1.getDegree() > n2.getDegree()) return 1;
else return -1;
}