OT - Validating Regular Expression in java

Hi all,

  I know it's not directly the purpose of this list, so I apologize, but
I think you guys are the ones who can help me :-)

My web site offers a search which supports regular expression (POSIX).
I'm looking for a way to validate the regular expression in the
application before sending it the the DB.  For now Postgresql throwing
an error on invalid regular expression.

I tried with  the gnu-regexp frameworks,  It works partly but it's not
full proof since an invalid caracter class like  [[:awefaewf:]]* is not
flagged as an error but causes an error with Postgresql.

Any help on this matter will be appreciated.  I'm sure it's a common
problem and have been addressed before ... I searched but haven't found
the answer yet.

Thanks for your help

/David

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