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KinoSearch::Searcher.3pm

NAME

KinoSearch::Searcher - execute searches

SYNOPSIS

     my $analyzer = KinoSearch::Analysis::PolyAnalyzer->new( 
         language => 'en',
     );
 
     my $searcher = KinoSearch::Searcher->new(
         invindex => $invindex,
         analyzer => $analyzer,
     );
     my $hits = $searcher->search( query => 'foo bar' );
 
 

DESCRIPTION

Use the Searcher class to perform queries against an invindex.

METHODS

new

     my $searcher = KinoSearch::Searcher->new(
         invindex => $invindex,
         analyzer => $analyzer,
     );
 
 

Constructor. Takes two labeled parameters, both of which are required.

*

invindex - can be either a path to an invindex, or a KinoSearch::Store::InvIndex object.

*

analyzer - An object which subclasses KinoSearch::Analysis::Analyer, such as a PolyAnalyzer. This must be identical to the Analyzer used at index-time, or the results won't match up.

search

     my $hits = $searcher->search( 
         query  => $query,  # required
         filter => $filter, # default: undef (no filtering)
     );
 
 

Process a search and return a Hits object. search() expects labeled hash-style parameters.

*

query - Can be either an object which subclasses KinoSearch::Search::Query, or a query string. If it's a query string, it will be parsed using a QueryParser and a search will be performed against all indexed fields in the invindex. For more sophisticated searching, supply Query objects, such as TermQuery and BooleanQuery.

*

filter - Must be a KinoSearch::Search::QueryFilter. Search results will be limited to only those documents which pass through the filter.

Caching a Searcher

When a Searcher is created, a small portion of the invindex is loaded into memory. For large document collections, this startup time may become noticable, in which case reusing the searcher is likely to speed up your search application. Caching a Searcher is especially helpful when running a high-activity app under mod_perl.

Searcher objects always represent a snapshot of an invindex as it existed when the Searcher was created. If you want the search results to reflect modifications to an invindex, you must create a new Searcher after the update process completes.

COPYRIGHT

Copyright 2005-2009 Marvin Humphrey

LICENSE, DISCLAIMER, BUGS, etc.

See KinoSearch version 0.165.