CompileTimeTaglib.h

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#ifndef CXXSP_COMPILE_TIME_TAGLIB_H_
#define CXXSP_COMPILE_TIME_TAGLIB_H_

#include <map>
#include <iostream>

#include "Taglib.h"

namespace servlet
{
namespace taglib
{

class Generator;

class CompileTimeTaglib: public Taglib
{
public:
    class TagFactoryBase
    {
    public:
        virtual ~TagFactoryBase();
        virtual Generator* makeTag(const std::string&)=0;
    };
    template <class T>
     class TagFactory: public TagFactoryBase
    {
    public:
        virtual Generator* makeTag(const std::string& name)
        {
            return new T(name);
        }
    };
private:
    typedef std::map<std::string, TagFactoryBase*> tagfactorymap_t;
    tagfactorymap_t m_factoryMap;
public:
    CompileTimeTaglib(const std::string& prefix);
    void registerTag(const std::string& name, TagFactoryBase* factory);
    virtual Generator* getTag(const std::string&);
    virtual void releaseTag(Generator*);
};

} // namespace taglib
} // namespace servlet

#define DECLARE_COMPILE_TIME_TAGLIB(prefix) extern "C" servlet::taglib::CompileTimeTaglib* get_taglib_##prefix();

#define COMPILE_TIME_TAGLIB(prefix) \
    extern "C" { \
        servlet::taglib::CompileTimeTaglib* get_taglib_##prefix() \
        { \
            static servlet::taglib::CompileTimeTaglib taglib(#prefix); \
            return &taglib; \
        } \
        servlet::taglib::Taglib* create_taglib_##prefix(const servlet::taglib::attribs_t&) \
        { \
            return get_taglib_##prefix();   \
        } \
    }

#define EXPORT_COMPILE_TIME_TAG(prefix,name,class) \
    struct register_compile_time_tag_##prefix##_##name##_t \
    { \
        register_compile_time_tag_##prefix##_##name##_t() \
        { \
            static servlet::taglib::CompileTimeTaglib::TagFactory<class> factory; \
            get_taglib_##prefix()->registerTag(#name, &factory); \
        } \
    } register_compile_time_tag_##prefix##_##name;

#endif // CXXSP_COMPILE_TIME_TAGLIB_H_
/* -*- c++ -*- */