SceneLoaderFactory.h

Go to the documentation of this file.

#pragma once
#include "SceneGraph.h"
#include <variant>
 
namespace dyno {
 
    class SceneLoader
    {
    public:
        using LoadResult = std::variant<std::shared_ptr<SceneGraph>, std::string>;
 
        virtual LoadResult load(const std::string filename) { return "null"; }
 
        virtual bool save(std::shared_ptr<SceneGraph> scn, const std::string filename) { return false; }
 
        virtual bool canLoadFileByName(const std::string filename) {
            std::string str = filename;
            std::string::size_type pos = str.find_last_of('.');
            if (pos == std::string::npos)
                return false; // no extension
 
            return canLoadFileByExtension(str.substr(pos + 1));
        }
 
        virtual bool canLoadFileByExtension(const std::string extension) { return false; }
    };
 
    class SceneLoaderFactory
    {
    public:
        typedef std::vector<SceneLoader*> SceneLoaderList;

        static SceneLoaderFactory& getInstance();
 
    public:
        SceneLoader* getEntryByFileExtension(std::string extension);

        SceneLoader* getEntryByFileName(std::string filename);

        SceneLoader* addEntry(SceneLoader* loader);

        SceneLoaderList* getEntryList() { return &m_loaders; }
 
    private:
        SceneLoaderFactory();

        SceneLoaderList m_loaders;
    };
 
 
}