D:/VL/BuildSystem/VL_DISTRO/Visualization_Library_SDK/src/vlCore/LoadWriterManager.hpp

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#ifndef LoadWriterManager_INCLUDE_ONCE
#define LoadWriterManager_INCLUDE_ONCE

#include <vlCore/ResourceLoadWriter.hpp>
#include <vlCore/ResourceDatabase.hpp>
#include <vlCore/VirtualFile.hpp>
#include <vlCore/Collection.hpp>
#include <vlCore/MemoryFile.hpp>
#include <vlCore/VisualizationLibrary.hpp>

namespace vl
{
  class LoadCallback: public Object
  {
  public:
    virtual void operator()(ResourceDatabase* db) = 0;
  };

  class WriteCallback: public Object
  {
  public:
    virtual void operator()(ResourceDatabase* db) = 0;
  };

  class VLCORE_EXPORT LoadWriterManager: public Object
  {
  public:
    virtual const char* className() { return "vl::LoadWriterManager"; }

    LoadWriterManager()
    { 
      mLoadWriters.setAutomaticDelete(false); 
      mLoadCallbacks.setAutomaticDelete(false);
      mWriteCallbacks.setAutomaticDelete(false);
    }

    LoadWriterManager(const LoadWriterManager& other): Object(other) 
    { 
      mLoadWriters.setAutomaticDelete(false); 
      mLoadCallbacks.setAutomaticDelete(false);
      mWriteCallbacks.setAutomaticDelete(false);
    }

    void registerLoadWriter(ResourceLoadWriter*);

    Collection<ResourceLoadWriter>* loadWriters() { return &mLoadWriters; }

    const Collection<ResourceLoadWriter>* loadWriters() const { return &mLoadWriters; }

    template<class T>
    T* loadWriter()
    {
      for(int i=0; i<loadWriters()->size(); ++i)
      {
        T* load_writer = dynamic_cast<T*>(loadWriters()->at(i));
        if (load_writer)
          return load_writer;
      }
      return NULL;
    }

    bool canLoad(const String& path)  const { return findLoader(path) != NULL; }

    bool canLoad(VirtualFile* file)   const { return findLoader(file->path()) != NULL; }

    bool canWrite(const String& path) const { return findWriter(path) != NULL; }

    bool canWrite(VirtualFile* file)  const { return findWriter(file->path()) != NULL; }

    const ResourceLoadWriter* findLoader(const String& path) const;

    const ResourceLoadWriter* findWriter(const String& path) const;

    const ResourceLoadWriter* findLoader(VirtualFile* file) const;

    const ResourceLoadWriter* findWriter(VirtualFile* file) const;

    ref<ResourceDatabase> loadResource(const String& path, bool quick=true) const;

    ref<ResourceDatabase> loadResource(VirtualFile* file, bool quick=true) const;

    bool writeResource(const String& path, ResourceDatabase* resource) const;

    bool writeResource(VirtualFile* file, ResourceDatabase* resource) const;

    const Collection<LoadCallback>* loadCallbacks() const { return &mLoadCallbacks; }

    const Collection<WriteCallback>* writeCallbacks() const { return &mWriteCallbacks; }

    Collection<LoadCallback>* loadCallbacks() { return &mLoadCallbacks; }

    Collection<WriteCallback>* writeCallbacks() { return &mWriteCallbacks; }

  protected:
    Collection<ResourceLoadWriter> mLoadWriters;
    Collection<LoadCallback> mLoadCallbacks;
    Collection<WriteCallback> mWriteCallbacks;
  };

  VLCORE_EXPORT LoadWriterManager* defLoadWriterManager();

  VLCORE_EXPORT void setDefLoadWriterManager(LoadWriterManager* lwm);

  inline void registerLoadWriter(ResourceLoadWriter* rlw) { defLoadWriterManager()->registerLoadWriter(rlw); }
}

#endif