ClassLibrary.h

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//
// ClassLibrary.h
//
// $Id: //poco/1.3/Foundation/include/Poco/ClassLibrary.h#3 $
//
// Library: Foundation
// Package: SharedLibrary
// Module:  ClassLoader
//
// Definitions for class libraries.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#ifndef Foundation_ClassLibrary_INCLUDED
#define Foundation_ClassLibrary_INCLUDED


#include "Poco/Foundation.h"
#include "Poco/Manifest.h"
#include <typeinfo>


#if defined(_WIN32)
        #define POCO_LIBRARY_API __declspec(dllexport)
#else
        #define POCO_LIBRARY_API
#endif


//
// the entry points for every class library
//
extern "C"
{
        bool POCO_LIBRARY_API pocoBuildManifest(Poco::ManifestBase* pManifest);
        void POCO_LIBRARY_API pocoInitializeLibrary();
        void POCO_LIBRARY_API pocoUninitializeLibrary();
} 


//
// additional support for named manifests
//
#define POCO_DECLARE_NAMED_MANIFEST(name) \
extern "C"      \
{                       \
        bool POCO_LIBRARY_API POCO_JOIN(pocoBuildManifest, name)(Poco::ManifestBase* pManifest); \
}


//
// Macros to automatically implement pocoBuildManifest
//
// usage:
//
// POCO_BEGIN_MANIFEST(MyBaseClass)
//     POCO_EXPORT_CLASS(MyFirstClass)
//     POCO_EXPORT_CLASS(MySecondClass)
//     ...
// POCO_END_MANIFEST
//
#define POCO_BEGIN_MANIFEST_IMPL(fnName, base) \
        bool fnName(Poco::ManifestBase* pManifest_)                                                                             \
        {                                                                                                                                                               \
                typedef base _Base;                                                                                                                     \
                typedef Poco::Manifest<_Base> _Manifest;                                                                        \
                std::string requiredType(typeid(_Manifest).name());                                                     \
                std::string actualType(pManifest_->className());                                                        \
                if (requiredType == actualType)                                                                                         \
                {                                                                                                                                                       \
                        Poco::Manifest<_Base>* pManifest = static_cast<_Manifest*>(pManifest_);


#define POCO_BEGIN_MANIFEST(base) \
        POCO_BEGIN_MANIFEST_IMPL(pocoBuildManifest, base)


#define POCO_BEGIN_NAMED_MANIFEST(name, base)   \
        POCO_DECLARE_NAMED_MANIFEST(name)                       \
        POCO_BEGIN_MANIFEST_IMPL(POCO_JOIN(pocoBuildManifest, name), base)


#define POCO_END_MANIFEST \
                        return true;    \
                }                                       \
                else return false;      \
        }


#define POCO_EXPORT_CLASS(cls) \
    pManifest->insert(new Poco::MetaObject<cls, _Base>(#cls));


#define POCO_EXPORT_SINGLETON(cls) \
        pManifest->insert(new Poco::MetaSingleton<cls, _Base>(#cls));


#endif // Foundation_ClassLibrary_INCLUDED