add retrieval of transitions from state to DPDA

alib2data/src/automaton/PDA/DPDA.cpp

@@ -194,6 +194,34 @@ const std::map<std::tuple<State, std::variant<string::Epsilon, alphabet::Symbol>
 	return transitions;
 }
+std::map<std::tuple<State, std::variant<string::Epsilon, alphabet::Symbol>, std::vector<alphabet::Symbol> >, std::pair<State, std::vector<alphabet::Symbol> > > DPDA::getTransitionsFromState(const State& from) const {
+	if( states.find(from) == states.end())
+		throw AutomatonException("State \"" + (std::string) from.getName() + "\" doesn't exist");
+
+	std::map<std::tuple<State, std::variant<string::Epsilon, alphabet::Symbol>, std::vector<alphabet::Symbol> >, std::pair<State, std::vector<alphabet::Symbol> > > transitionsFromState;
+	for (auto transition = transitions.begin(); transition != transitions.end(); transition++) {
+		if (std::get<0>(transition->first) == from) {
+			transitionsFromState.insert(std::make_pair(transition->first, transition->second));
+		}
+	}
+
+	return transitionsFromState;
+}
+
+std::map<std::tuple<State, std::variant<string::Epsilon, alphabet::Symbol>, std::vector<alphabet::Symbol> >, std::pair<State, std::vector<alphabet::Symbol> > > DPDA::getTransitionsToState(const State& to) const {
+	if( states.find(to) == states.end())
+		throw AutomatonException("State \"" + (std::string) to.getName() + "\" doesn't exist");
+
+	std::map<std::tuple<State, std::variant<string::Epsilon, alphabet::Symbol>, std::vector<alphabet::Symbol> >, std::pair<State, std::vector<alphabet::Symbol> > > transitionsToState;
+	for (auto transition = transitions.begin(); transition != transitions.end(); transition++) {
+		if (transition->second.first == to) {
+			transitionsToState.insert(std::make_pair(transition->first, transition->second));
+		}
+	}
+
+	return transitionsToState;
+}
+
 bool DPDA::operator==(const ObjectBase& other) const {
 	return other == *this;
 }

alib2data/src/automaton/PDA/DPDA.h

@@ -81,6 +81,16 @@ public:
 	 */
 	const std::map<std::tuple<State, std::variant<string::Epsilon, alphabet::Symbol>, std::vector<alphabet::Symbol> >, std::pair<State, std::vector<alphabet::Symbol> > >& getTransitions() const;
+	/**
+	 * @return automaton transitions from state
+	 */
+	std::map<std::tuple<State, std::variant<string::Epsilon, alphabet::Symbol>, std::vector<alphabet::Symbol> >, std::pair<State, std::vector<alphabet::Symbol> > > getTransitionsFromState(const State& from) const;
+	
+	/**
+	 * @return automaton transitions to state
+	 */
+	std::map<std::tuple<State, std::variant<string::Epsilon, alphabet::Symbol>, std::vector<alphabet::Symbol> >, std::pair<State, std::vector<alphabet::Symbol> > > getTransitionsToState(const State& from) const;
+
 	virtual bool operator<(const alib::ObjectBase& other) const;
 	virtual bool operator==(const alib::ObjectBase& other) const;
 	virtual bool operator>(const alib::ObjectBase& other) const;