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List:       lucene-user
Subject:    Re: QueryParser refactoring
From:       Erik Hatcher <erik () ehatchersolutions ! com>
Date:       2005-03-09 14:16:42
Message-ID: 76f66b60015608cb675cc6567f7a0d45 () ehatchersolutions ! com
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On Mar 9, 2005, at 7:25 AM, sergiu gordea wrote:
> transformations to be reversible
> (I mean something like Query => String => Query, with the constraint 
> initial query equals final query).
>
> Ok ... I give up ... if  this feature is to hard to be implemented, 
> the soltution will be to work around in my source code to make it 
> work.

It's not just hard, its impossible in the generalizable sense.  An 
analyzer is involved in parsing a query and could easily 
remove/change/add to the query.  I suspect there are probably issues 
with escaped characters as well.  For many cases with a straightforward 
analyzer and queries that use alphabetic terms then it'll probably work 
fine as you've seen, but relying on Query.toString is risky.

	Erik


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