MemCore::LoaderRegistry Class Reference

Database for routines that may create objects of type X. More...

#include </home/werner/origo/vish/memcore/Loader.hpp>

List of all members.

Static Public Member Functions

• static void append (const type_info &id, const RefPtr< Loader< X > > &ldr)
• static bool isloadable (const RefPtr< LoaderParameters > &LP)

  Check whether some loader parameters might be handable here.
  

• static RefPtr< X > load (bool &success, const RefPtr< LoaderParameters > &LP, const RefPtr< X > &xptr=NullPtr())

  Actually load some object from the input source.
  

• static RefPtr< LoaderRequest > request (const RefPtr< LoaderParameters > &LP, const RefPtr< X > &xptr=NullPtr())

  Actually load some object from the input source.
  

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Detailed Description

Database for routines that may create objects of type X.

The LoaderRegistry class allows to actually create objects of type X from a certain input source. The input source is specified through the LoaderParameters class, which may carry arbitrary additional interfaces.

bool success; 
RefPtr<LoaderParameters> LP = new LoaderParameters("FileName.txt"); 

        LP->addInterface( new ProgressDisplay() );

RefPtr<X> object = LoaderRegistry<X>::load(success, LP);

Implementation of a new Loader: Consider a type Bundle to be created from some input source. We introduce an artificial type, here called HDF5

struct  HDF5 {};

with no other purpose as to provide a unique typeid in C++. We implement a loader by deriving from the Loader<Bundle> base class:

struct  myHDF5Loader : Loader<Bundle>
{
        override RefPtr<Bundle> load(const RefPtr<LoaderParameters>&, const RefPtr<Bundle>&Xptr = NullPtr() )
        {}
};

The name of this class is not of relevance. We now add an instance of this loader to the LoaderRegistry for the Bundle type:

        MemCore::LoaderRegistry<Bundle>::append( typeid(HDF5), new myHDF5Loader() );

Now we have the means to iterate over all loaders which have been registered for the type Bundle. This iteration is implemented in function LoaderRegistryBase::domain_load() as a static function, or easier as LoaderRegistry<Bundle>::load();

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The documentation for this class was generated from the following file:

• memcore/Loader.hpp