X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Floader.h;h=de0b32deaaa06f4aae771ff64644a68cfdfe4d11;hb=a887b3f7518605c22e4b70eeb9fe136acb2ea632;hp=3c4785c493017eadeef3f2c20bb70e05b4bb9cf8;hpb=7df5e45c7f414f6a07681dc4ec2abb63b091a309;p=libs%2Fdatafile.git

diff --git a/source/loader.h b/source/loader.h
index 3c4785c..de0b32d 100644
--- a/source/loader.h
+++ b/source/loader.h
@@ -3,8 +3,8 @@
 
 #include <map>
 #include <msp/io/file.h>
-#include "except.h"
 #include "loaderaction.h"
+#include "meta.h"
 #include "parser.h"
 #include "statement.h"
 
@@ -31,36 +31,27 @@ 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
 {
 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;
+	typedef std::map<StatementKey, LoaderAction *> ActionMap;
 
 	ActionMap actions;
+	Parser *cur_parser;
+	unsigned cur_level;
 	const Statement *cur_st;
 	bool sub_loaded;
+	bool direct;
+	std::vector<Loader *> aux_loaders;
 protected:
-	bool allow_pointer_reload;
 	bool check_sub_loads;
 
 	Loader();
 public:
 	virtual ~Loader();
 
-	bool is_pointer_reload_allowed() const { return allow_pointer_reload; }
-
 	/** Loads statements from a parser. */
 	void load(Parser &p);
 
@@ -68,6 +59,9 @@ 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);
 
@@ -135,58 +129,76 @@ 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;
-	}
+	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
 /**
-Deprecated.  See ObjectLoader 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<typename O>
-class BasicLoader: public Loader
+template<typename T, typename... Args>
+void load(T &obj, const std::string &fn, Args &... args)
 {
-public:
-	typedef O Object;
+	IO::BufferedFile in(fn);
 
-protected:
-	O &obj;
+	Parser parser(in, fn);
+	typename T::Loader loader(obj, args...);
+	loader.load(parser);
+}
 
-public:
-	BasicLoader(O &o): obj(o) { }
-	O &get_object() const { return obj; }
-};
+/**
+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);
+}
 
 /**
-Deprecated.  See CollectionObjectLoader in objectloader.h.
+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 O, typename C>
-class BasicLoader2: public BasicLoader<O>
+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)
 {
-public:
-	typedef C Collection;
+	RefPtr<IO::Seekable> in = coll.open_raw(fn);
+	if(!in)
+		throw IO::file_not_found(fn);
 
-protected:
-	C &coll;
-
-public:
-	BasicLoader2(O &o, C &c): BasicLoader<O>(o), coll(c) { }
-	C &get_collection() const { return coll; }
-};
+	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.
@@ -201,6 +213,10 @@ void load(T &obj, const std::string &fn)
 	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)
 {
@@ -210,6 +226,7 @@ void load(T &obj, const std::string &fn, U &arg)
 	typename T::Loader loader(obj, arg);
 	loader.load(parser);
 }
+#endif
 
 } // namespace DataFile
 } // namespace Msp