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.IX Title "Plucene::Search::Filter 3pm"
.TH Plucene::Search::Filter 3pm "2018-04-02" "perl v5.26.1" "User Contributed Perl Documentation"
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.SH "NAME"
Plucene::Search::Filter \- A search filter base class
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This doesn't seem to be being used just yet. But here is some info 
on filters:
.PP
Filtering means imposing additional restriction on the hit list to 
eliminate hits that otherwise would be included in the search results.
.PP
There are two ways to filter hits:
.IP "\(bu" 4
Search Query \- in this approach, provide your custom filter object 
to the when you call the \fIsearch()\fR method. This filter will be called exactly 
once to evaluate every document that resulted in non zero score.
.IP "\(bu" 4
Selective Collection \- in this approach you perform the regular 
search and when you get back the hit list, collect only those that matches 
your filtering criteria. In this approach, your filter is called only for 
hits that returned by the search method which may be only a subset of the 
non zero matches (useful when evaluating your search filter is expensive).
.SH "METHODS"
.IX Header "METHODS"
.SS "bits"
.IX Subsection "bits"
This must be defined in a subclass