public void addTurn(List<Road> via, Road.End to) {
assert equals(to.getJunction());
Relation existing = null;
for (Turn t : to.getTurns()) {
if (t.getFrom().getOutgoingRoadEnd().equals(getOutgoingRoadEnd()) && t.getVia().equals(via)) {
if (t.getFrom().equals(this)) {
// was already added
return;
}
existing = t.getRelation();
}
}
final Relation r;
if (existing == null) {
r = new Relation();
r.put("type", Constants.TYPE_TURNS);
r.addMember(new RelationMember(Constants.TURN_ROLE_FROM, getOutgoingRoadEnd().getWay()));
if (via.isEmpty()) {
r.addMember(new RelationMember(Constants.TURN_ROLE_VIA, getOutgoingJunction().getNode()));
} else {
for (Way w :
Utils.flattenVia(getOutgoingJunction().getNode(), via, to.getJunction().getNode())) {
r.addMember(new RelationMember(Constants.TURN_ROLE_VIA, w));
}
}
r.addMember(new RelationMember(Constants.TURN_ROLE_TO, to.getWay()));
getOutgoingJunction().getNode().getDataSet().addPrimitive(r);
} else {
r = existing;
}
final String key = isExtra() ? Constants.TURN_KEY_EXTRA_LANES : Constants.TURN_KEY_LANES;
final List<Integer> lanes = Turn.indices(r, key);
lanes.add(getIndex());
r.put(key, Turn.join(lanes));
}
