void UmlForkActivityNode::solve_output_flows() {
// input and outputs flows must be control/data
UmlFlow * f;
ControlOrData k;
const Q3PtrVector<UmlItem> ch = children();
unsigned n = ch.size();
if (!_incoming_flows.isEmpty()) {
f = _incoming_flows.getFirst();
k = f->control_or_data();
}
else {
f = 0;
k = Unset;
}
if (k == Unset) {
// look at output flows
for (unsigned i = 0; i != n; i += 1) {
UmlFlow * f = dynamic_cast<UmlFlow *>(ch[i]);
if ((f != 0) && ((k = f->control_or_data()) != Unset))
break;
}
if (f != 0) {
// f is unset
if (k != Unset) {
if (f->control_or_data() == Unset)
// propagate on input
f->set_control_or_data(k);
}
else {
// solve input flow
((UmlActivityNode *) f->parent())->solve_output_flows();
k = f->control_or_data();
if (k == Unset)
// not possible to know, force control
k = IsControl;
// propagate on input
f->set_control_or_data(k);
}
}
}
// propagate on output
for (unsigned i = 0; i != n; i += 1) {
UmlFlow * f = dynamic_cast<UmlFlow *>(ch[i]);
if ((f != 0) && (f->control_or_data() == Unset))
f->set_control_or_data(k);
}
}
