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04 Aug 2013 16:12:58 UTC
- Distribution: Lucy
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Bus factor: 1- License: apache_2_0
- Perl: v5.8.3
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NAME
Lucy::Index::PostingList - Term-Document pairings.
SYNOPSIS
my $posting_list_reader = $seg_reader->obtain("Lucy::Index::PostingListReader"); my $posting_list = $posting_list_reader->posting_list( field => 'content', term => 'foo', ); while ( my $doc_id = $posting_list->next ) { say "Matching doc id: $doc_id"; }
DESCRIPTION
PostingList is an iterator which supplies a list of document ids that match a given term.
See Lucy::Docs::IRTheory for definitions of "posting" and "posting list".
ABSTRACT METHODS
next()
Proceed to the next doc id.
Returns: A positive doc id, or 0 once the iterator is exhausted.
get_doc_id()
Return the current doc id. Valid only after a successful call to next() or advance() and must not be called otherwise.
get_doc_freq()
Return the number of documents that the PostingList contains. (This number will include any documents which have been marked as deleted but not yet purged.)
seek(target)
Prepare the PostingList object to iterate over matches for documents that match
target
.target - The term to match. If undef, the iterator will be empty.
METHODS
advance(target)
Advance the iterator to the first doc id greater than or equal to
target
. The default implementation simply calls next() over and over, but subclasses have the option of doing something more efficient.target - A positive doc id, which must be greater than the current doc id once the iterator has been initialized.
Returns: A positive doc id, or 0 once the iterator is exhausted.
INHERITANCE
Lucy::Index::PostingList isa Lucy::Search::Matcher isa Lucy::Object::Obj.
Module Install Instructions
To install Lucy::Simple, copy and paste the appropriate command in to your terminal.
cpanm Lucy::Simple
perl -MCPAN -e shell install Lucy::Simple
For more information on module installation, please visit the detailed CPAN module installation guide.