wrapper of methods

[jacek]

why I shouldn't use pointertomembers.

They're ugly, so if you want ot use them, hide them inside the class.

Anyway: What do you suggest for this case? The same?

How about this?

TransformationFactory::TransformationFactory() 
{
   transformations[ SomeTransformation ] = new SomeTransformation();
   ...
}
 
const Transformation * TransformationFactory::get( TransformationType type ) 
{
   return transformations[ type ];
}
 
...
 
transformedVector = factory.get( SomeTransformation )->transform( originalVector );

TransformationFactory::TransformationFactory() 
{
   transformations[ SomeTransformation ] = new SomeTransformation();
   ...
}

const Transformation * TransformationFactory::get( TransformationType type ) 
{
   return transformations[ type ];
}

...

transformedVector = factory.get( SomeTransformation )->transform( originalVector );

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