|how to find all matching regexps? firstname.lastname@example.org (Max Spring) (2001-11-08)|
|From:||Max Spring <email@example.com>|
|Date:||8 Nov 2001 01:15:46 -0500|
|Organization:||Cisco Systems Inc.|
|Posted-Date:||08 Nov 2001 01:15:46 EST|
I have a set S of regular expressions which gets built at runtime.
For a given input string t, I want to efficiently determine *all*
regular expressions out of S which match t.
The actual match operation must be as time-efficient as possible,
while constructing any helper data structure during startup when S is
known may take some time.
The approach which I see so far goes to constructing an NFA for S
(pretending S = e1 | e2 | ... | en) where each final state holds
references to appropriate representations of the corresponding regular
Now my question: Instead of writing everything from scratch, is there
any regular expression library which is usable as a foundation for
this purpose? (Preferrably in Java)
Further suggestions or comments are highly appreciated.
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