/**
* Initializes default class loader. It inherits from classloader, which was used to load this
* task, therefore build-in classes and resources are loaded automatically.
*
* <p>Notice: task's classpath has priority over default classpath, therefore we are able to
* easily override resources (templates)
*/
protected void initClassloader() {
// NOTICE: we should use the same classloader, which was used to load this task
// otherwise we won't be able to cast instances
// (that were loaded via different class loaders)
// we are introducting workaround,
// that tries to add classpath for current task to original class loader
// and stores original classpath
// after the task is executed, classpath is restored
ClassLoader classLoader = getClass().getClassLoader();
if (classLoader instanceof AntClassLoader) {
// add defined classpath
AntClassLoader antClassLoader = (AntClassLoader) classLoader;
antClassLoader.setParentFirst(false);
antClassLoader.setProject(getProject());
savedClasspath = antClassLoader.getClasspath();
Path cp = getClasspath();
// add defined classpath to original path
cp.add(new Path(getProject(), savedClasspath));
antClassLoader.setClassPath(cp);
} else {
// create new class loader
classLoader =
new AntClassLoader(getClass().getClassLoader(), getProject(), getClasspath(), false);
}
// set this class loader as new class loader for whole thread
// ContextClassLoader is used in StringTemplate's PathGroupLoader and other classes
Thread.currentThread().setContextClassLoader(classLoader);
}
public Path finishCircuit(int dispair, Vertex home, Graphics g) {
visited = true;
Path bestPath = new Path();
bestPath.cost = 100000000;
if (dispair == 0) // Last being visited
{
Iterator<Edge> it = edges.iterator();
Boolean match = false;
// Looks through all this vertex's edges and find the one that goes home
while (!match && it.hasNext()) {
Edge f = it.next();
if (f.fromVertex.ident == home.ident) {
Path p = new Path();
bestPath = p;
bestPath.add(f);
match = true;
}
}
} else {
Iterator<Edge> it = edges.iterator();
// Finds all possible paths through nodes not visited
while (it.hasNext()) {
Edge e = it.next();
Vertex c = e.fromVertex;
if (!c.visited) {
e.drawMe(g, Color.black); // Draws edge
Path p = c.finishCircuit(dispair - 1, home, g);
p.add(e);
e.drawMe(g, Color.green); // Un-draws edge
if (p.cost < bestPath.cost) // Sets bestPath
{
bestPath = p;
}
}
}
}
visited = false;
return bestPath;
}
private void adding(Road road, Path path) {
roadHelper.setPathId(road.getID(), path.getId());
if (!path.contains(road)) {
path.add(road);
if (entrances.contains(road)) {
path.addEntrance(getEntrance(road));
}
}
}
private void createAPath(Road neighbourRoad, Path path) {
if (!path.contains(neighbourRoad)) {
path.add(neighbourRoad);
added.add(neighbourRoad);
}
addEntrances(path, neighbourRoad);
for (Road road : roadHelper.getConnectedRoads(neighbourRoad.getID())) {
if (entrances.contains(road) || added.contains(road)) {
continue;
}
if (end || roadHelper.getConnectedRoads(neighbourRoad.getID()).size() == 1) {
return;
}
if (headRoads.contains(road)) {
if (!end) {
end = true;
if (!path.contains(road)) {
path.add(road);
}
path.setEndOfPath(road);
}
} else if (!end) {
createAPath(road, path);
}
}
if (!end) {
for (Road neighbourR : roadHelper.getConnectedRoads(neighbourRoad.getID())) {
if (headRoads.contains(neighbourR)) {
if (!path.contains(neighbourR)) {
path.add(neighbourR);
}
path.setEndOfPath(neighbourR);
end = true;
}
}
}
}
private void addEntrances(Path path, Road road) {
Entrance entrance;
for (Road n : roadHelper.getConnectedRoads(road.getID())) {
if (entrances.contains(n)) {
roadHelper.setPathId(n.getID(), path.getId());
if (!path.contains(n) && !added.contains(n)) {
path.add(n);
added.add(n);
}
entrance = getEntrance(n);
if (!path.getEntrances().contains(entrance)) {
path.addEntrance(entrance);
}
}
}
}
private List<Path> createThisHeadRoadPaths(Road head) {
List<Path> paths = new ArrayList<Path>();
List<Road> headRoadEntrances = new ArrayList<Road>();
for (Road neighbourRoad : roadHelper.getConnectedRoads(head.getID())) {
if (added.contains(neighbourRoad)) {
continue;
} else if (entrances.contains(neighbourRoad)) {
added.add(neighbourRoad);
headRoadEntrances.add(neighbourRoad);
continue;
}
end = false;
Path path = new Path(world);
path.add(head);
added.add(head);
path.setHeadOfPath(head);
createAPath(neighbourRoad, path);
paths.add(path);
added.remove(head);
}
if (!headRoadEntrances.isEmpty() && paths.size() > 0) {
List<Road> temp = new ArrayList<Road>();
temp.addAll(paths.get(0));
paths.get(0).clear();
for (Road road : headRoadEntrances) {
paths.get(0).add(road);
paths.get(0).addEntrance(getEntrance(road));
}
paths.get(0).addAll(temp);
}
return paths;
}
/** Answer a new Path whose elements are this Path with <code>s</code> added at the end */
public Path append(Statement s) {
Path newPath = new Path(this);
newPath.add(s);
return newPath;
}