X-Git-Url: http://git.tdb.fi/?p=libs%2Fdatafile.git;a=blobdiff_plain;f=source%2Floader.h;h=574ecce0c11b5bac9af56d82b6a0782a5288d8b6;hp=6f7e61464db509bf50e5c62fe26d851018f5d342;hb=9c95942d24a92abea14bb9e11d33daae2d017321;hpb=3eb3c5cce35d3d6193afadecc3707f9c2448f370 diff --git a/source/loader.h b/source/loader.h index 6f7e614..574ecce 100644 --- a/source/loader.h +++ b/source/loader.h @@ -1,18 +1,10 @@ -/* $Id$ - -This file is part of libmspdatafile -Copyright © 2006-2008, 2010 Mikko Rasa, Mikkosoft Productions -Distributed under the LGPL -*/ - #ifndef MSP_DATAFILE_LOADER_H_ #define MSP_DATAFILE_LOADER_H_ #include -#include #include -#include "except.h" #include "loaderaction.h" +#include "meta.h" #include "parser.h" #include "statement.h" @@ -39,30 +31,32 @@ When loading has finished successfully, the virtual function finish() is called. Any post-processing of the data should be placed here and not in the destructor. -See also classes BasicLoader and BasicLoader2. +See also classes ObjectLoader and CollectionObjectLoader in objectloader.h. */ -class Loader +class Loader: private NonCopyable { -private: - struct ActionKey +protected: + class ActionMap: public std::map, private NonCopyable { - std::string keyword; - std::string signature; - - ActionKey(const std::string &, const std::string &); - - bool operator<(const ActionKey &) const; + public: + ~ActionMap(); }; - typedef std::map 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 aux_loaders; protected: - Loader(): cur_st(0) { } + bool check_sub_loads; + + Loader(); public: - virtual ~Loader(); + virtual ~Loader() { } /** Loads statements from a parser. */ void load(Parser &p); @@ -71,6 +65,9 @@ private: /** 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); @@ -97,6 +94,11 @@ protected: /** 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 void add(const std::string &k, void (L::*func)()) @@ -106,21 +108,15 @@ protected: void add(const std::string &k, void (L::*func)(A0)) { add(k, new LoaderFunc1(func)); } - template - void add(const std::string &k, void (L::*func)(A0, A1)) - { add(k, new LoaderFunc2(func)); } - - template - void add(const std::string &k, void (L::*func)(A0, A1, A2)) - { add(k, new LoaderFunc3(func)); } + template + void add(const std::string &k, void (L::*func)(Args...)) + { add(k, new LoaderFuncN(func)); } - template - void add(const std::string &k, void (L::*func)(A0, A1, A2, A3)) - { add(k, new LoaderFunc4(func)); } - - template - void add(const std::string &k, void (L::*func)(A0, A1, A2, A3, A4)) - { add(k, new LoaderFunc5(func)); } + /** Adds a keyword that is loaded by calling a function with a bound + first argument. */ + template + void add(const std::string &k, void (L::*func)(B0, Args...), const typename RemoveReference::Type &b0) + { add(k, new LoaderFuncNBound1(func, b0)); } /** Adds a keyword that is loaded into a member of the loaded object. */ template @@ -138,81 +134,71 @@ protected: 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 to implement relative paths in include-like statements. Note that the source may not necessarily be a file. */ - const std::string &get_source() const - { - if(!cur_st) - throw InvalidState("get_source called without current statement"); - return cur_st->source; - } - - virtual void finish() { } -}; + 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; -/** -Deprecated. See ObjectLoader in objectloader.h. -*/ -template -class BasicLoader: public Loader -{ -public: - typedef O Object; - -protected: - O &obj; - -public: - BasicLoader(O &o): obj(o) { } - O &get_object() const { return obj; } + virtual void finish() { } }; /** -Deprecated. See CollectionObjectLoader in objectloader.h. +Loads an object from a file. The object must have a public Loader class. Any +extra arguments are passed to the Loader constructor. */ -template -class BasicLoader2: public BasicLoader +template +void load(T &obj, const std::string &fn, Args &... args) { -public: - typedef C Collection; - -protected: - C &coll; - -public: - BasicLoader2(O &o, C &c): BasicLoader(o), coll(c) { } - C &get_collection() const { return coll; } -}; + IO::BufferedFile in(fn); + Parser parser(in, fn); + typename T::Loader loader(obj, args...); + loader.load(parser); +} /** -Loads an object from a file. The object must have a public Loader class. +Loads an object from a file stored in a collection. The object must have a +public Loader class. The collection is passed to the Loader constructor, +followed by any extra arguments. */ -template -void load(T &obj, const std::string &fn) +template +void load(T &obj, typename T::Loader::Collection &coll, const std::string &fn, Args &... args) { - IO::File in(fn); - IO::Buffered buf(in); + RefPtr in = coll.open_raw(fn); + if(!in) + throw IO::file_not_found(fn); - Parser parser(buf, fn); - typename T::Loader loader(obj); + Parser parser(*in, fn); + typename T::Loader loader(obj, coll, args...); loader.load(parser); } -template -void load(T &obj, const std::string &fn, U &arg) +/** +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 EnableIf::value, void>::No load(T &obj, C &coll, const std::string &fn, Args &... args) { - IO::File in(fn); - IO::Buffered buf(in); + RefPtr in = coll.open_raw(fn); + if(!in) + throw IO::file_not_found(fn); - Parser parser(buf, fn); - typename T::Loader loader(obj, arg); + Parser parser(*in, fn); + typename T::Loader loader(obj, args...); loader.load(parser); }