#include <map>
#include <msp/io/file.h>
#include "loaderaction.h"
+#include "meta.h"
#include "parser.h"
#include "statement.h"
See also classes ObjectLoader and CollectionObjectLoader in objectloader.h.
*/
-class Loader
+class Loader: private NonCopyable
{
-private:
- struct ActionKey
- {
- std::string keyword;
- std::string signature;
-
- ActionKey(const std::string &, const std::string &);
-
- bool operator<(const ActionKey &) const;
- };
-
- typedef std::map<ActionKey, LoaderAction *> ActionMap;
+protected:
+ typedef std::map<StatementKey, LoaderAction *> ActionMap;
- ActionMap actions;
+private:
+ ActionMap local_actions;
+ ActionMap *actions;
+ Parser *cur_parser;
+ unsigned cur_level;
const Statement *cur_st;
bool sub_loaded;
+ bool direct;
+ std::vector<Loader *> aux_loaders;
protected:
bool check_sub_loads;
/** Loads data from a statement. */
void load(const Statement &st);
+ /** Loads statemsnts from a parser, feeding them directly to actions. */
+ void load_direct(Parser &, unsigned);
+
/** Processes a single statement */
void load_statement(const Statement &st);
/** Processes the current statement's substatements with another Loader. */
void load_sub_with(Loader &);
+ /** Sets the actions to be used when loading. If the map is empty,
+ init_actions will be called. */
+ void set_actions(ActionMap &);
+ virtual void init_actions() { }
+
/** Adds a keyword that is loaded by calling a function. */
template<typename L>
void add(const std::string &k, void (L::*func)())
void add(const std::string &k, void (L::*func)(A0))
{ add(k, new LoaderFunc1<L, A0>(func)); }
+#if __cplusplus>=201103L
+ template<typename L, typename... Args>
+ void add(const std::string &k, void (L::*func)(Args...))
+ { add(k, new LoaderFuncN<L, Args...>(func)); }
+
+#else
template<typename L, typename A0, typename A1>
void add(const std::string &k, void (L::*func)(A0, A1))
{ add(k, new LoaderFunc2<L, A0, A1>(func)); }
template<typename L, typename A0, typename A1, typename A2, typename A3, typename A4>
void add(const std::string &k, void (L::*func)(A0, A1, A2, A3, A4))
{ add(k, new LoaderFunc5<L, A0, A1, A2, A3, A4>(func)); }
+#endif
+
+#if __cplusplus>=201103L
+ /** Adds a keyword that is loaded by calling a function with a bound
+ first argument. */
+ template<typename L, typename B0, typename... Args>
+ void add(const std::string &k, void (L::*func)(B0, Args...), const typename RemoveReference<B0>::Type &b0)
+ { add(k, new LoaderFuncNBound1<L, B0, Args...>(func, b0)); }
+#endif
/** Adds a keyword that is loaded into a member of the loaded object. */
template<typename L, typename T0>
private:
void add(const std::string &, LoaderAction *);
- LoaderAction *find_action(const ActionKey &) const;
+protected:
+ void add_auxiliary_loader(Loader &);
+
+private:
+ bool has_action(const StatementKey &) const;
+ LoaderAction *find_action(const StatementKey &) const;
protected:
/** Returns the source of the statement being processed. This can be used
source may not necessarily be a file. */
const std::string &get_source() const;
+ /** Returns the keyword of the statement being processed. Can be used to
+ implement dynamic keywords. */
+ const std::string &get_keyword() const;
+
virtual void finish() { }
};
+#if __cplusplus>=201103L
+/**
+Loads an object from a file. The object must have a public Loader class. Any
+extra arguments are passed to the Loader constructor.
+*/
+template<typename T, typename... Args>
+void load(T &obj, const std::string &fn, Args &... args)
+{
+ IO::BufferedFile in(fn);
+
+ Parser parser(in, fn);
+ typename T::Loader loader(obj, args...);
+ loader.load(parser);
+}
+
+/**
+Loads an object from a file stored in a collection. The object must havea
+public Loader class. The collection is passed to the Loader constructor,
+followed by any extra arguments.
+*/
+template<typename T, typename... Args>
+void load(T &obj, typename T::Loader::Collection &coll, const std::string &fn, Args &... args)
+{
+ RefPtr<IO::Seekable> in = coll.open_raw(fn);
+ if(!in)
+ throw IO::file_not_found(fn);
+
+ Parser parser(*in, fn);
+ typename T::Loader loader(obj, coll, args...);
+ loader.load(parser);
+}
+
+/**
+Loads an object from a file stored in a collection. The object must havea
+public Loader class. Any extra arguments are passed to the Loader constructor.
+*/
+template<typename T, typename C, typename... Args>
+typename EnableIf<NeedsCollection<typename T::Loader>::value, void>::No load(T &obj, C &coll, const std::string &fn, Args &... args)
+{
+ RefPtr<IO::Seekable> in = coll.open_raw(fn);
+ if(!in)
+ throw IO::file_not_found(fn);
+
+ Parser parser(*in, fn);
+ typename T::Loader loader(obj, args...);
+ loader.load(parser);
+}
+
+#else
+
/**
Loads an object from a file. The object must have a public Loader class.
*/
loader.load(parser);
}
+/**
+Loads an object from a file, passing one extra argument to the Loader
+constructor. The object must have a public Loader class.
+*/
template<typename T, typename U>
void load(T &obj, const std::string &fn, U &arg)
{
typename T::Loader loader(obj, arg);
loader.load(parser);
}
+#endif
} // namespace DataFile
} // namespace Msp