/ 
Lucy-0.4.3
River stage two • 13 direct dependents • 20 total dependents
/ Lucy::Search::IndexSearcher

NAME

Lucy::Search::IndexSearcher - Execute searches against a single index.

SYNOPSIS

my $searcher = Lucy::Search::IndexSearcher->new( 
    index => '/path/to/index' 
);
my $hits = $searcher->hits(
    query      => 'foo bar',
    offset     => 0,
    num_wanted => 100,
);

DESCRIPTION

Use the IndexSearcher class to perform search queries against an index. (For searching multiple indexes at once, see PolySearcher).

IndexSearchers operate against a single point-in-time view or Snapshot of the index. If an index is modified, a new IndexSearcher must be opened to access the changes.

CONSTRUCTORS

new( [labeled params] )

my $searcher = Lucy::Search::IndexSearcher->new( 
    index => '/path/to/index' 
);

  • index - Either a string filepath, a Folder, or an IndexReader.

METHODS

hits( [labeled params] )

Return a Hits object containing the top results.

  • query - Either a Query object or a query string.

  • offset - The number of most-relevant hits to discard, typically used when "paging" through hits N at a time. Setting offset to 20 and num_wanted to 10 retrieves hits 21-30, assuming that 30 hits can be found.

  • num_wanted - The number of hits you would like to see after offset is taken into account.

  • sort_spec - A Lucy::Search::SortSpec, which will affect how results are ranked and returned.

collect( [labeled params] )

Iterate over hits, feeding them into a Collector.

  • query - A Query.

  • collector - A Collector.

doc_max()

Return the maximum number of docs in the collection represented by the Searcher, which is also the highest possible internal doc id. Documents which have been marked as deleted but not yet purged are included in this count.

doc_freq( [labeled params] )

Return the number of documents which contain the term in the given field.

  • field - Field name.

  • term - The term to look up.

fetch_doc(doc_id)

Retrieve a document. Throws an error if the doc id is out of range.

  • doc_id - A document id.

get_schema()

Accessor for the object's schema member.

get_reader()

Accessor for the object's reader member.

INHERITANCE

Lucy::Search::IndexSearcher isa Lucy::Search::Searcher isa Clownfish::Obj.