PorterStemmerTokenizerFactory ?

[Carrie Coy]

I've read different suggestions on how to handle cases where synonyms 
are used and there are multiple
version of the original word that need to point to the same set of 
synonyms (/responsibility, responsibilities, obligation, duty/ ).

The approach that seems most logical is to configure a 
SynonymFilterFactory to use a custom TokenizerFactory that stems 
synonyms by calling out to the PorterStemmer.

Does anyone know if a PorterStemmerTokenizerFactory already exists 
somewhere?

Thank you.
Carrie Coy