work/git/mixpp/bdm/uibuilder.h

#ifndef UIBUILD
#define UIBUILD

#include "libconfig/libconfig.h++"
#include <itpp/itbase.h>
#include "stat/libBM.h"

namespace bdm{

using namespace libconfig;
using namespace std;

#define CHECK_UITYPE(S,Type) it_assert_debug(S.getType()==Setting::Type, string("Wrong input path \"")+string(S.getPath())+string("\""));
#define UIREGISTER(UI) UI* UI##_global_instance = new UI();


class UIbuilder;
typedef map<const string, const UIbuilder*> UImap;
extern UImap __uimap__;

class UIFile : public Config{
        public:
        UIFile(const char * fname):Config(){
                try{Config::readFile(fname);} 
                catch (ParseException& P) {
                        char msg[200];
                        sprintf(msg,"Error in file %s  on line %d.", fname, P.getLine());
                        it_error(msg);
                } 
                catch (FileIOException f) {it_error("File " + string(fname) + " not found");} 
        }
};

class UIbuilder {
        protected:
                static const UIbuilder* theinstance;
        vec getvec ( Setting& S ) {
                CHECK_UITYPE(S,TypeArray);
                vec tmp;
                tmp.set_size ( S.getLength() );
                for ( int i=0;i<S.getLength();i++ ) {
                        switch (S[i].getType()) {
                                case Setting::TypeFloat :
                                        tmp[i]=double(S[i]);break;
                                case Setting::TypeInt :
                                        tmp[i]=int(S[i]);break;
                                case Setting::TypeBoolean :
                                        tmp[i]=bool(S[i]);break;
                                default: it_error("libconfig error?");
                        } 
                }
                return tmp;
        };
        vec getivec ( Setting& S ) {
                CHECK_UITYPE(S,TypeArray);
                vec tmp;
                tmp.set_size ( S.getLength() );
                for ( int i=0;i<S.getLength();i++ ) {
                        switch (S[i].getType()) {
                                case Setting::TypeFloat :
                                        tmp[i]=double(S[i]);break;
                                case Setting::TypeInt :
                                        tmp[i]=int(S[i]);break;
                                case Setting::TypeBoolean :
                                        tmp[i]=bool(S[i]);break;
                                        default: it_error("libconfig error?");
                        } 
                }
                return tmp;
        };
        public:
                UIbuilder(const string &typ){__uimap__.insert(make_pair(typ,this));}
                virtual void build(Setting &S, void** result) const =0;
};

class UIexternal:public UIbuilder{
        public:
                UIexternal():UIbuilder("external"){}
                void build(Setting &S, void** result) const;
};

class UIinternal:public UIbuilder{
        public:
                UIinternal():UIbuilder("internal"){}
                void build(Setting &S, void** result) const;
};

template<class T>
                void UIbuild(Setting &S, T** ret){
        CHECK_UITYPE(S,TypeGroup);
        T* tmp;
        // Check if field "type" is present, if not it is not a valid UI
        it_assert_debug(S.exists("type"), string(S.getPath())+" is not a valid UI!");
                
        const string typ=S["type"];
        // Find "type" in list of registred UI builders
        UImap::const_iterator iter = __uimap__.find( typ );
        if( iter == __uimap__.end()) {
                it_error("UI of type \"" + typ + "\" is not registered!");
        }
        else {
                const UIbuilder* is= iter->second; 
                //BUILD the result
                is->build(S,reinterpret_cast<void**>(&tmp));
        }
        // make assignment
        *ret=tmp;
};

}
#endif UIBUILD

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