TextFiltering Question

Hi,

  I have had a look at the excellent screencasts for filtering ,sorting etc and also had a look at the api.
After  having a close look at the textmatcher & textmatcher editor class ,i have a question

 If i have to implement a text searching functionality where i have to provide
  a) (contains/startswith) +(case insensitive/sensitive) search
  b) regex search

Would a good approach be extending Textmatcher or TextSearchStrategy adding those extra modes
(it seems the TextSearchStrategy is only private accesible & very closed tied to theTextmatcher  ) ,
OR  instead implement my own matchers for a) & b) and have my own abstractmatchereditor.



Regards,
Pavan Kumar