// --- private functions ----
/** Add a transition from DA states da_from to stuttered_state to for edge elem.
* If the state does not yet exist in the DA, create it.
* @param da_from the from state in the DA
* @param to the target state
* @param elem the edge label
*/
DA_State add_transition(DA_State da_from, TreeWithAcceptance to, APElement elem)
{
DA_State da_to = _state_mapper.find(to);
if (da_to == null)
{
da_to = _da_result.newState();
to.generateAcceptance(da_to.acceptance());
if (_detailed_states)
{
// da_to.setDescription(to->toHTML());
}
_state_mapper.add(to, da_to);
_unprocessed.Push(new KeyValuePair <TreeWithAcceptance, DA_State>(to, da_to));
}
#if STUTTERED_VERBOSE
std::cerr << da_from->getName() << " -> " << da_to->getName() << std::endl;
#endif
da_from.edges().set(elem, da_to);
return(da_to);
}
/** Calculate and add transitions to the successor state.
* @param from the source stuttered_state
* @param da_from the source DA state
* @param elem the edge label
*/
void calc_delta(TreeWithAcceptance from, DA_State da_from, APElement elem)
{
//StateMapper<SafraTree, int , ptr_hash<algo_state_t>> intermediate_state_map_t; //, PtrComparator<algo_state_t>
Dictionary <StateInterface, int> state_map = new Dictionary <StateInterface, int>();
List <StateInterface> state_vector = new List <StateInterface>();
StateInterface start_tree = from.getTree();
//state_map[start_tree] = null;
state_map.Add(start_tree, 0);
state_vector.Add(start_tree); //push_back
#if STUTTERED_VERBOSE
std::cerr << "Calculate from state [" << da_from->getName() << "], " << (unsigned
int )
elem << ":" << std::endl;
std::cerr << start_tree->toString() << std::endl;
#endif
StateInterface cur_tree = start_tree;
while (true)
{
StateInterface next_tree = _algo.delta(cur_tree as SafraTree, elem).getState();
//typename intermediate_state_map_t::iterator it;
//int it = state_map.find(next_tree);
//if (it == state_map.end())
if (!state_map.ContainsKey(next_tree))
{
// tree doesn't yet exist...
// add tree
//state_map[next_tree] = state_vector.size();
state_map.Add(next_tree, state_vector.Count);
state_vector.Add(next_tree); //push_back
cur_tree = next_tree;
continue;
}
else
{
// found the cycle!
int cycle_point = state_map[next_tree];
#if STUTTERED_VERBOSE
std::cerr << "-----------------------\n";
for (unsigned int i = 0; i < state_vector.size(); i++)
{
std::cerr << "[" << i << "] ";
if (cycle_point == i)
{
std::cerr << "* ";
}
std::cerr << "\n" << state_vector[i]->toString() << std::endl;
}
std::cerr << "-----------------------\n";
#endif
prefix_and_cycle_state_t pac = calculate_prefix_and_cycle_state(state_vector, cycle_point);
//DA_State da_prefix = null;
DA_State da_cycle = null;
if (pac.prefix_state != null && !(pac.prefix_state == pac.cycle_state))
{
DA_State da_prefix = add_transition(da_from, pac.prefix_state, elem);
da_cycle = add_transition(da_prefix, pac.cycle_state, elem);
}
else
{
da_cycle = add_transition(da_from, pac.cycle_state, elem);
}
da_cycle.edges().set(elem, da_cycle);
return;
}
}
}
//typedef typename DA_t::state_type da_state_t;
//typedef typename Algorithm_t::state_t algo_state_t;
//typedef typename Algorithm_t::result_t algo_result_t;
//typedef TreeWithAcceptance<algo_state_t, typename Acceptance::signature_type> stuttered_state_t;
//typedef typename stuttered_state_t::ptr stuttered_state_ptr_t;
//typedef std::pair<stuttered_state_ptr_t, da_state_t*> unprocessed_value_t;
//typedef std::stack<unprocessed_value_t> unprocessed_stack_t;
/** Convert the NBA to the DA */
public void convert()
{
APSet ap_set = _da_result.getAPSet();
if (_algo.checkEmpty())
{
_da_result.constructEmpty();
return;
}
_algo.prepareAcceptance(_da_result.acceptance());
TreeWithAcceptance s_start = new TreeWithAcceptance(_algo.getStartState());
DA_State start_state = _da_result.newState();
s_start.generateAcceptance(start_state.acceptance());
if (_detailed_states)
{
//start_state->setDescription(s_start->toHTML());
start_state.setDescription("hahahahah");
}
_state_mapper.add(s_start, start_state);
_da_result.setStartState(start_state);
Stack <KeyValuePair <TreeWithAcceptance, DA_State> > unprocessed;
_unprocessed.Push(new KeyValuePair <TreeWithAcceptance, DA_State>(s_start, start_state));
bool all_insensitive = _stutter_information.isCompletelyInsensitive();
BitSet partial_insensitive = _stutter_information.getPartiallyInsensitiveSymbols();
while (_unprocessed.Count > 0)
{
KeyValuePair <TreeWithAcceptance, DA_State> top = _unprocessed.Pop();
//_unprocessed.pop();
TreeWithAcceptance from = top.Key;
DA_State da_from = top.Value;
//for (APSet::element_iterator it_elem=ap_set.all_elements_begin();it_elem!=ap_set.all_elements_end();++it_elem)
for (int it_elem = ap_set.all_elements_begin(); it_elem != ap_set.all_elements_end(); ++it_elem)
{
APElement elem = new APElement(it_elem);
if (da_from.edges().get(elem) == null)
{
// the edge was not yet calculated...
if (!all_insensitive && partial_insensitive.get(it_elem) == null)
{
// can't stutter for this symbol, do normal step
SafraTree next_tree = _algo.delta(from.getTree() as SafraTree, elem).getState();
TreeWithAcceptance next_state = new TreeWithAcceptance(next_tree);
add_transition(da_from, next_state, elem);
continue;
}
// normal stuttering...
calc_delta(from, da_from, elem);
if (_limit != 0 && _da_result.size() > _limit)
{
//THROW_EXCEPTION(LimitReachedException, "");
throw new Exception("LimitReachedException");
}
}
}
}
}
