public StateEditor(State parent, Edge e) {
child = parent.clone();
child.backState = parent;
child.backEdge = e;
// We clear child.next here, since it could have already been set in the
// parent
child.next = null;
if (e == null) {
child.backState = null;
child.hops = 0;
child.vertex = parent.vertex;
child.stateData = child.stateData.clone();
} else {
child.hops = parent.hops + 1;
// be clever
// Note that we use equals(), not ==, here to allow for dynamically
// created vertices
if (e.getFromVertex().equals(e.getToVertex()) && parent.vertex.equals(e.getFromVertex())) {
// TODO LG: We disable this test: the assumption that
// the from and to vertex of an edge are not the same
// is not true anymore: bike rental on/off edges.
traversingBackward = parent.getOptions().isArriveBy();
child.vertex = e.getToVertex();
} else if (parent.vertex.equals(e.getFromVertex())) {
traversingBackward = false;
child.vertex = e.getToVertex();
} else if (parent.vertex.equals(e.getToVertex())) {
traversingBackward = true;
child.vertex = e.getFromVertex();
} else {
// Parent state is not at either end of edge.
LOG.warn("Edge is not connected to parent state: {}", e);
LOG.warn(" from vertex: {}", e.getFromVertex());
LOG.warn(" to vertex: {}", e.getToVertex());
LOG.warn(" parent vertex: {}", parent.vertex);
defectiveTraversal = true;
}
if (traversingBackward != parent.getOptions().isArriveBy()) {
LOG.error(
"Actual traversal direction does not match traversal direction in TraverseOptions.");
defectiveTraversal = true;
}
if (parent.stateData.noThruTrafficState == NoThruTrafficState.INIT
&& !(e instanceof FreeEdge)) {
setNoThruTrafficState(NoThruTrafficState.BETWEEN_ISLANDS);
}
}
}
public StateEditor(RoutingRequest options, Vertex v) {
child = new State(v, options);
child.stateData = new StateData(options);
}
/**
* To be called before modifying anything in the child's StateData. Makes sure that changes are
* applied to a copy of StateData rather than the same one that is still referenced in existing,
* older states.
*/
private void cloneStateDataAsNeeded() {
if (child.backState != null && child.stateData == child.backState.stateData)
child.stateData = child.stateData.clone();
}