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https://issues.apache.org/jira/browse/LUCENE-3041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13025669#comment-13025669
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Simon Willnauer commented on LUCENE-3041:
-----------------------------------------
Chris, nice simplification. I have one question, lets say we have a boolean
query OR(AND(Fuzzy:A, Fuzzy:B), AND(Fuzzy A, Fuzzy:C)) how would it be possible
with the current patch to reuse the rewrite for Fuzzy:A? As far as I can see If
I don't rewrite the boolean query myself the current patch will rewrite the top
level query and returns right? So somehow it must be possible to walk down the
query ast.
or do I miss something?
> Support Query Visting / Walking
> -------------------------------
>
> Key: LUCENE-3041
> URL: https://issues.apache.org/jira/browse/LUCENE-3041
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Search
> Reporter: Chris Male
> Priority: Minor
> Attachments: LUCENE-3041.patch, LUCENE-3041.patch
>
>
> Out of the discussion in LUCENE-2868, it could be useful to add a generic
> Query Visitor / Walker that could be used for more advanced rewriting,
> optimizations or anything that requires state to be stored as each Query is
> visited.
> We could keep the interface very simple:
> {code}
> public interface QueryVisitor {
> Query visit(Query query);
> }
> {code}
> and then use a reflection based visitor like Earwin suggested, which would
> allow implementators to provide visit methods for just Querys that they are
> interested in.
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