#ifndef __ACTION_H__
#define __ACTION_H__
+#include <vector>
+#include <string>
+#include <ext/hash_map>
+#include <locale>
+
+//! A list of strings, each string representing an effect.
+typedef std::vector<std::string> Literals;
+//! A map, but really a list of pairs, the precondition as a string, and a bool, true if it's a hard precondition, otherwise false.
+typedef __gnu_cxx::hash_map<std::string,bool> Preconditions;
+//! A map from returnvalue of the execution to the effects achieved.
+typedef __gnu_cxx::hash_map<int,Literals> EffectsMap;
+
+// These are needed to be able to use std::string as key in a hash_map.
+namespace __gnu_cxx {
+ template< typename CharT, typename Traits, typename Alloc >
+ struct hash< std::basic_string<CharT, Traits, Alloc> > {
+ size_t operator()(const std::basic_string<CharT, Traits, Alloc>& s) const {
+
+ const std::collate<CharT>& c = std::use_facet< std::collate<CharT> >(std::locale());
+
+ return c.hash(s.c_str(), s.c_str() + s.size());
+
+ }
+
+ };
+
+ template< typename CharT, typename Traits, typename Alloc >
+ struct hash< const std::basic_string<CharT, Traits, Alloc> > { //yes you need this version aswell!
+
+ size_t operator()(const std::basic_string<CharT, Traits, Alloc>& s) const {
+
+ const std::collate<CharT>& c = std::use_facet< std::collate<CharT> >(std::locale());
+
+ return c.hash(s.c_str(), s.c_str() + s.size());
+ }
+
+ };
+};
+
+/**
+ * This class holds the information associated with an action.
+ * This is the name, the preconditions, the executable and the effects.
+ */
class Action {
+ public:
+ /**
+ * Creates an action.
+ * @param name The name given to this action.
+ * @param preconditions The preconditions needed before execution of this action.
+ * @param executable The executable which will be executed.
+ * @param effects The effects which will be achieved after execution.
+ */
+ Action(std::string name, const Preconditions& preconditions, std::string executable, const EffectsMap& effects);
- protected:
- std::string executable;
- std::vector<string> preconditions;
- std::vector<string> effects;
+ /**
+ * Creates a copy of the given action.
+ */
+ Action(const Action& action);
+ /**
+ * Creates an empty, non-functional, action.
+ */
+ Action(){};
+ /**
+ * Returns the effects which will be achived if the action returns
+ * the input value.
+ */
+ const Literals& effects(int value) const;
+
+ /**
+ * Returns the preconditions needed before execution of this action.
+ */
+ const Preconditions& preconditions() const;
+ /**
+ * Returns the name of this action.
+ */
+ const std::string& name() const;
+ /**
+ * Executes this action.
+ * @return the returnvalue of the execution. Can be used to find out the effects achieved.
+ */
+ int execute() const;
+
+ protected:
+ //! The name of the action.
+ std::string _name;
+ //! The executable which can be executed.
+ std::string _executable;
+ //! The preconditions needed before execution.
+ Preconditions _preconditions;
+ //! The effects which can be achieved.
+ EffectsMap _effects;
+ //! An empty list of effects which will be returned if the returnvalue was not found in _effects.
+ static const Literals _empty;
};
+
#endif