-/* $Id$
-
-This file is part of libmspdatafile
-Copyright © 2006-2008 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
#ifndef MSP_DATAFILE_LOADER_H_
#define MSP_DATAFILE_LOADER_H_
#include <map>
-#include <msp/io/buffered.h>
#include <msp/io/file.h>
-#include "except.h"
#include "loaderaction.h"
#include "parser.h"
#include "statement.h"
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:
- typedef std::map<std::string, LoaderAction *> ActionMap;
+ struct ActionKey
+ {
+ std::string keyword;
+ std::string signature;
- ActionMap actions;
- const Statement *cur_st;
+ ActionKey(const std::string &, const std::string &);
+ bool operator<(const ActionKey &) const;
+ };
+
+ typedef std::map<ActionKey, LoaderAction *> ActionMap;
+
+ ActionMap actions;
+ const Statement *cur_st;
+ bool sub_loaded;
protected:
- Loader(): cur_st(0) { }
+ bool check_sub_loads;
+
+ Loader();
public:
virtual ~Loader();
private:
void add(const std::string &, LoaderAction *);
+ LoaderAction *find_action(const ActionKey &) 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;
- virtual void finish() { }
-};
+ /** Throws a data_error from the current line. */
+ void error(const std::string &) const;
-
-/**
-Provides the basic functionality of an object loader. Deriving from this
-allows loading values directly into member variables of the objects.
-*/
-template<typename O>
-class BasicLoader: public Loader
-{
-public:
- typedef O Object;
-
-protected:
- O &obj;
-
-public:
- BasicLoader(O &o): obj(o) { }
- O &get_object() const { return obj; }
-};
-
-
-/**
-Provides functionality for loading objects with a Collection. Deriving from
-this allows loading pointers to objects in the collection automatically.
-*/
-template<typename O, typename C>
-class BasicLoader2: public BasicLoader<O>
-{
-public:
- typedef C Collection;
-
-protected:
- C &coll;
-
-public:
- BasicLoader2(O &o, C &c): BasicLoader<O>(o), coll(c) { }
- C &get_collection() const { return coll; }
+ virtual void finish() { }
};
template<typename T>
void load(T &obj, const std::string &fn)
{
- IO::File in(fn);
- IO::Buffered buf(in);
+ IO::BufferedFile in(fn);
- Parser parser(buf, fn);
+ Parser parser(in, fn);
typename T::Loader loader(obj);
loader.load(parser);
}
template<typename T, typename U>
void load(T &obj, const std::string &fn, U &arg)
{
- IO::File in(fn);
- IO::Buffered buf(in);
+ IO::BufferedFile in(fn);
- Parser parser(buf, fn);
+ Parser parser(in, fn);
typename T::Loader loader(obj, arg);
loader.load(parser);
}