proxy.h

/***************************************************************************
 * proxy.h
 * This file is part of the KDE project
 * copyright (C)2004-2005 by Sebastian Sauer (mail@dipe.org)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 * You should have received a copy of the GNU Library General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 ***************************************************************************/
 
#ifndef KROSS_API_PROXY_H
#define KROSS_API_PROXY_H
 
#include "object.h"
#include "variant.h"
#include "list.h"
 
#include <tqstring.h>
 
namespace Kross { namespace Api {

    template<class OBJ>
    struct ProxyArgTranslator {
        OBJ* m_object;
        ProxyArgTranslator(Kross::Api::Object* obj) {
            m_object = Kross::Api::Object::fromObject<OBJ>(obj);
        }
        template<typename T>
        inline operator T () {
            return m_object->operator T();
        }
    };

    struct ProxyRetTranslator {
        template<class RETURNOBJ, typename TYPE>
        inline static Object::Ptr cast(TYPE t) {
            return RETURNOBJ::toObject(t);
        }
    };

    template< class INSTANCE, // the objectinstance
              typename METHOD, // the method-signature
              class RETURNOBJ,// = Kross::Api::Object, // return-value
              class ARG1OBJ = Kross::Api::Object, // first parameter-value
              class ARG2OBJ = Kross::Api::Object, // second parameter-value
              class ARG3OBJ = Kross::Api::Object, // theird parameter-value
              class ARG4OBJ = Kross::Api::Object // forth parameter-value
    >
    class ProxyFunction : public Function
    {
            template<class PROXYFUNC, typename RETURNTYPE>
            friend struct ProxyFunctionCaller;
        private:
            INSTANCE* m_instance;
            const METHOD m_method;

            TDESharedPtr<ARG1OBJ> m_defarg1;
            TDESharedPtr<ARG2OBJ> m_defarg2;
            TDESharedPtr<ARG3OBJ> m_defarg3;
            TDESharedPtr<ARG4OBJ> m_defarg4;

            template<class PROXYFUNC, typename RETURNTYPE>
            struct ProxyFunctionCaller {
                inline static Object::Ptr exec(PROXYFUNC* self, Kross::Api::Object* arg1, Kross::Api::Object* arg2, Kross::Api::Object* arg3, Kross::Api::Object* arg4) {
                    return ProxyRetTranslator::cast<RETURNTYPE>(
                        ( (self->m_instance)->*(self->m_method) )( ProxyArgTranslator<ARG1OBJ>(arg1), ProxyArgTranslator<ARG2OBJ>(arg2), ProxyArgTranslator<ARG3OBJ>(arg3), ProxyArgTranslator<ARG4OBJ>(arg4) )
                    );
                }
            };

            template<class PROXYFUNC>
            struct ProxyFunctionCaller<PROXYFUNC, void> {
                inline static Object::Ptr exec(PROXYFUNC* self, Kross::Api::Object* arg1, Kross::Api::Object* arg2, Kross::Api::Object* arg3, Kross::Api::Object* arg4) {
                    ( (self->m_instance)->*(self->m_method) )( ProxyArgTranslator<ARG1OBJ>(arg1), ProxyArgTranslator<ARG1OBJ>(arg2), ProxyArgTranslator<ARG3OBJ>(arg3), ProxyArgTranslator<ARG4OBJ>(arg4) );
                    return 0; // void return-value
                }
            };
 
        public:

            ProxyFunction(INSTANCE* instance, const METHOD& method, ARG1OBJ* defarg1 = 0, ARG2OBJ* defarg2 = 0, ARG3OBJ* defarg3 = 0, ARG4OBJ* defarg4 = 0)
                : m_instance(instance), m_method(method), m_defarg1(defarg1), m_defarg2(defarg2), m_defarg3(defarg3), m_defarg4(defarg4) {}

            Object::Ptr call(List::Ptr args) {
                return ProxyFunctionCaller<ProxyFunction, RETURNOBJ>::exec(this,
                    args->item(0, m_defarg1),
                    args->item(1, m_defarg2),
                    args->item(2, m_defarg3),
                    args->item(3, m_defarg4)
                );
            }
    };

    template<class INSTANCE, typename METHOD, class RETURNOBJ, class ARG1OBJ, class ARG2OBJ, class ARG3OBJ>
    class ProxyFunction<INSTANCE, METHOD, RETURNOBJ, ARG1OBJ, ARG2OBJ, ARG3OBJ> : public Function
    {
            template<class PROXYFUNC, typename RETURNTYPE>
            friend struct ProxyFunctionCaller;
        private:
            INSTANCE* m_instance;
            const METHOD m_method;
            TDESharedPtr<ARG1OBJ> m_defarg1;
            TDESharedPtr<ARG2OBJ> m_defarg2;
            TDESharedPtr<ARG3OBJ> m_defarg3;
 
            template<class PROXYFUNC, typename RETURNTYPE>
            struct ProxyFunctionCaller {
                inline static Object::Ptr exec(PROXYFUNC* self, Kross::Api::Object* arg1, Kross::Api::Object* arg2, Kross::Api::Object* arg3) {
                    return ProxyRetTranslator::cast<RETURNTYPE>(
                        ( (self->m_instance)->*(self->m_method) )( ProxyArgTranslator<ARG1OBJ>(arg1), ProxyArgTranslator<ARG2OBJ>(arg2), ProxyArgTranslator<ARG3OBJ>(arg3) )
                    );
                }
            };
 
            template<class PROXYFUNC>
            struct ProxyFunctionCaller<PROXYFUNC, void> {
                inline static Object::Ptr exec(PROXYFUNC* self, Kross::Api::Object* arg1, Kross::Api::Object* arg2, Kross::Api::Object* arg3) {
                    ( (self->m_instance)->*(self->m_method) )( ProxyArgTranslator<ARG1OBJ>(arg1), ProxyArgTranslator<ARG2OBJ>(arg2), ProxyArgTranslator<ARG3OBJ>(arg3) );
                    return 0;
                }
            };
 
        public:
            ProxyFunction(INSTANCE* instance, const METHOD& method, ARG1OBJ* defarg1 = 0, ARG2OBJ* defarg2 = 0, ARG3OBJ* defarg3 = 0)
                : m_instance(instance), m_method(method), m_defarg1(defarg1), m_defarg2(defarg2), m_defarg3(defarg3) {}
            Object::Ptr call(List::Ptr args) {
                return ProxyFunctionCaller<ProxyFunction, RETURNOBJ>::exec(this,
                    args->item(0, m_defarg1), args->item(1, m_defarg2), args->item(2, m_defarg3)
                );
            }
    };

    template<class INSTANCE, typename METHOD, class RETURNOBJ, class ARG1OBJ, class ARG2OBJ>
    class ProxyFunction<INSTANCE, METHOD, RETURNOBJ, ARG1OBJ, ARG2OBJ> : public Function
    {
            template<class PROXYFUNC, typename RETURNTYPE>
            friend struct ProxyFunctionCaller;
        private:
            INSTANCE* m_instance;
            const METHOD m_method;
            TDESharedPtr<ARG1OBJ> m_defarg1;
            TDESharedPtr<ARG2OBJ> m_defarg2;
 
            template<class PROXYFUNC, typename RETURNTYPE>
            struct ProxyFunctionCaller {
                inline static Object::Ptr exec(PROXYFUNC* self, Kross::Api::Object* arg1, Kross::Api::Object* arg2) {
                    return ProxyRetTranslator::cast<RETURNTYPE>(
                        ( (self->m_instance)->*(self->m_method) )( ProxyArgTranslator<ARG1OBJ>(arg1), ProxyArgTranslator<ARG2OBJ>(arg2) )
                    );
                }
            };
 
            template<class PROXYFUNC>
            struct ProxyFunctionCaller<PROXYFUNC, void> {
                inline static Object::Ptr exec(PROXYFUNC* self, Kross::Api::Object* arg1, Kross::Api::Object* arg2) {
                    ( (self->m_instance)->*(self->m_method) )( ProxyArgTranslator<ARG1OBJ>(arg1), ProxyArgTranslator<ARG2OBJ>(arg2) );
                    return 0;
                }
            };
 
        public:
            ProxyFunction(INSTANCE* instance, const METHOD& method, ARG1OBJ* defarg1 = 0, ARG2OBJ* defarg2 = 0)
                : m_instance(instance), m_method(method), m_defarg1(defarg1), m_defarg2(defarg2) {}
            Object::Ptr call(List::Ptr args) {
                return ProxyFunctionCaller<ProxyFunction, RETURNOBJ>::exec(this,
                    args->item(0, m_defarg1), args->item(1, m_defarg2)
                );
            }
    };

    template<class INSTANCE, typename METHOD, class RETURNOBJ, class ARG1OBJ>
    class ProxyFunction<INSTANCE, METHOD, RETURNOBJ, ARG1OBJ> : public Function
    {
            template<class PROXYFUNC, typename RETURNTYPE>
            friend struct ProxyFunctionCaller;
        private:
            INSTANCE* m_instance;
            const METHOD m_method;
            TDESharedPtr<ARG1OBJ> m_defarg1;
 
            template<class PROXYFUNC, typename RETURNTYPE>
            struct ProxyFunctionCaller {
                inline static Object::Ptr exec(PROXYFUNC* self, Kross::Api::Object* arg1) {
                    return ProxyRetTranslator::cast<RETURNTYPE>(
                        ( (self->m_instance)->*(self->m_method) )( ProxyArgTranslator<ARG1OBJ>(arg1) )
                    );
                }
            };
 
            template<class PROXYFUNC>
            struct ProxyFunctionCaller<PROXYFUNC, void> {
                inline static Object::Ptr exec(PROXYFUNC* self, Kross::Api::Object* arg1) {
                    ( (self->m_instance)->*(self->m_method) )( ProxyArgTranslator<ARG1OBJ>(arg1) );
                    return 0;
                }
            };
 
        public:
            ProxyFunction(INSTANCE* instance, const METHOD& method, ARG1OBJ* defarg1 = 0)
                : m_instance(instance), m_method(method), m_defarg1(defarg1) {}
            Object::Ptr call(List::Ptr args) {
                return ProxyFunctionCaller<ProxyFunction, RETURNOBJ>::exec(this,
                    args->item(0, m_defarg1)
                );
            }
    };

    template<class INSTANCE, typename METHOD, class RETURNOBJ>
    class ProxyFunction<INSTANCE, METHOD, RETURNOBJ> : public Function
    {
            template<class PROXYFUNC, typename RETURNTYPE>
            friend struct ProxyFunctionCaller;
        private:
            INSTANCE* m_instance;
            const METHOD m_method;
 
            template<class PROXYFUNC, typename RETURNTYPE>
            struct ProxyFunctionCaller {
                inline static Object::Ptr exec(PROXYFUNC* self) {
                    return ProxyRetTranslator::cast<RETURNTYPE>(
                        ( (self->m_instance)->*(self->m_method) )()
                    );
                }
            };
 
            template<class PROXYFUNC>
            struct ProxyFunctionCaller<PROXYFUNC, void> {
                inline static Object::Ptr exec(PROXYFUNC* self) {
                    ( (self->m_instance)->*(self->m_method) )();
                    return 0;
                }
            };
 
        public:
            ProxyFunction(INSTANCE* instance, const METHOD& method)
                : m_instance(instance), m_method(method) {}
            Object::Ptr call(List::Ptr) {
                return ProxyFunctionCaller<ProxyFunction, RETURNOBJ>::exec(this);
            }
    };
 
}}
 
#endif