--- /dev/null
+/* $Id$
+
+This file is part of libmspdatafile
+Copyright © 2006-2008 Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#ifndef MSP_DATAFILE_LOADERACTION_H_
+#define MSP_DATAFILE_LOADERACTION_H_
+
+#include "except.h"
+#include "statement.h"
+
+namespace Msp {
+namespace DataFile {
+
+class Loader;
+
+/**
+Base class for loader actions.
+*/
+class LoaderAction
+{
+public:
+ /**
+ Called when a statement is to be loaded.
+ */
+ virtual void execute(Loader &, const Statement &) const=0;
+ virtual ~LoaderAction() { }
+protected:
+ LoaderAction() { }
+};
+
+
+/**
+Loads a statement by calling a function that takes no arguments.
+*/
+template<typename L>
+class LoaderFunc0: public LoaderAction
+{
+public:
+ typedef void (L::*FuncType)();
+
+ LoaderFunc0(FuncType f): func(f) { }
+ void execute(Loader &l, const Statement &st) const
+ {
+ if(st.args.size()!=0) throw TypeError("Wrong number of arguments");
+ (dynamic_cast<L &>(l).*func)();
+ };
+private:
+ FuncType func;
+};
+
+
+/**
+Loads a statement by calling a function that takes one argument.
+*/
+template<typename L, typename A0>
+class LoaderFunc1: public LoaderAction
+{
+public:
+ typedef void (L::*FuncType)(A0);
+
+ LoaderFunc1(FuncType f): func(f) { }
+ void execute(Loader &l, const Statement &st) const
+ {
+ if(st.args.size()!=1) throw TypeError("Wrong number of arguments");
+ (dynamic_cast<L &>(l).*func)(st.args[0].get<A0>());
+ }
+private:
+ FuncType func;
+};
+
+
+/**
+Loads a statement by calling a function that takes an array of values.
+*/
+template<typename L, typename A0>
+class LoaderFunc1<L, const std::vector<A0> &>: public LoaderAction
+{
+public:
+ typedef void (L::*FuncType)(const std::vector<A0> &);
+
+ LoaderFunc1(FuncType f): func(f) { }
+ void execute(Loader &l, const Statement &st) const
+ {
+ std::vector<A0> values;
+ values.reserve(st.args.size());
+ for(ValueArray::const_iterator i=st.args.begin(); i!=st.args.end(); ++i)
+ values.push_back(i->get<A0>());
+ (dynamic_cast<L &>(l).*func)(values);
+ }
+private:
+ FuncType func;
+};
+
+
+template<typename L, typename A0, typename A1>
+class LoaderFunc2: public LoaderAction
+{
+public:
+ typedef void (L::*FuncType)(A0, A1);
+
+ LoaderFunc2(FuncType f): func(f) { }
+ void execute(Loader &l, const Statement &st) const
+ {
+ if(st.args.size()!=2) throw TypeError("Wrong number of arguments");
+ (dynamic_cast<L &>(l).*func)(st.args[0].get<A0>(), st.args[1].get<A1>());
+ }
+private:
+ FuncType func;
+};
+
+
+template<typename L, typename A0, typename A1, typename A2>
+class LoaderFunc3: public LoaderAction
+{
+public:
+ typedef void (L::*FuncType)(A0, A1, A2);
+
+ LoaderFunc3(FuncType f): func(f) { }
+ void execute(Loader &l, const Statement &st) const
+ {
+ if(st.args.size()!=3) throw TypeError("Wrong number of arguments");
+ (dynamic_cast<L &>(l).*func)(st.args[0].get<A0>(), st.args[1].get<A1>(), st.args[2].get<A2>());
+ }
+private:
+ FuncType func;
+};
+
+
+template<typename L, typename A0, typename A1, typename A2, typename A3>
+class LoaderFunc4: public LoaderAction
+{
+public:
+ typedef void (L::*FuncType)(A0, A1, A2, A3);
+
+ LoaderFunc4(FuncType f): func(f) { }
+ void execute(Loader &l, const Statement &st) const
+ {
+ if(st.args.size()!=4) throw TypeError("Wrong number of arguments");
+ (dynamic_cast<L &>(l).*func)(st.args[0].get<A0>(), st.args[1].get<A1>(), st.args[2].get<A2>(), st.args[3].get<A3>());
+ }
+private:
+ FuncType func;
+};
+
+
+template<typename L, typename A0, typename A1, typename A2, typename A3, typename A4>
+class LoaderFunc5: public LoaderAction
+{
+public:
+ typedef void (L::*FuncType)(A0, A1, A2, A3, A4);
+
+ LoaderFunc5(FuncType f): func(f) { }
+ void execute(Loader &l, const Statement &st) const
+ {
+ if(st.args.size()!=5) throw TypeError("Wrong number of arguments");
+ (dynamic_cast<L &>(l).*func)(st.args[0].get<A0>(), st.args[1].get<A1>(), st.args[2].get<A2>(), st.args[3].get<A3>(), st.args[4].get<A4>());
+ }
+private:
+ FuncType func;
+};
+
+
+template<typename L, typename T0>
+class LoadValue1: public LoaderAction
+{
+public:
+ typedef T0 L::*Pointer0Type;
+
+ LoadValue1(Pointer0Type p0): ptr0(p0) { }
+ void execute(Loader &l, const Statement &st) const
+ {
+ if(st.args.size()!=1) throw TypeError("Wrong number of arguments");
+ dynamic_cast<typename L::Loader &>(l).get_object().*ptr0=st.args[0].get<T0>();
+ }
+private:
+ Pointer0Type ptr0;
+};
+
+
+template<typename L, typename T0>
+class LoadValue1<L, T0 *>: public LoaderAction
+{
+public:
+ typedef T0 *L::*Pointer0Type;
+
+ LoadValue1(Pointer0Type p0): ptr0(p0) { }
+ void execute(Loader &l, const Statement &st) const
+ {
+ if(st.args.size()!=1) throw TypeError("Wrong number of arguments");
+ typename L::Loader &ldr=dynamic_cast<typename L::Loader &>(l);
+ ldr.get_object().*ptr0=ldr.get_collection().template get<T0>(st.args[0].get<std::string>());
+ }
+private:
+ Pointer0Type ptr0;
+};
+
+
+template<typename L, typename T0, typename T1>
+class LoadValue2: public LoaderAction
+{
+public:
+ typedef T0 L::*Pointer0Type;
+ typedef T1 L::*Pointer1Type;
+
+ LoadValue2(Pointer0Type p0, Pointer1Type p1): ptr0(p0), ptr1(p1) { }
+ void execute(Loader &l, const Statement &st) const
+ {
+ if(st.args.size()!=2) throw TypeError("Wrong number of arguments");
+ dynamic_cast<typename L::Loader &>(l).get_object().*ptr0=st.args[0].get<T0>();
+ dynamic_cast<typename L::Loader &>(l).get_object().*ptr1=st.args[1].get<T1>();
+ }
+private:
+ Pointer0Type ptr0;
+ Pointer1Type ptr1;
+};
+
+} // namespace DataFile
+} // namespace Msp
+
+#endif
projects / libs / datafile.git / blobdiff