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Lucy::Search::IndexSearcher – Apache Lucy Documentation
Apache Lucy™

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

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

Create a new IndexSearcher.

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

METHODS

doc_max

my $int = $index_searcher->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

my $int = $index_searcher->doc_freq(
    field => $field  # required
    term  => $term   # required
);

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

  • field - Field name.
  • term - The term to look up.

collect

$index_searcher->collect(
    query     => $query      # required
    collector => $collector  # required
);

Iterate over hits, feeding them into a Collector.

  • query - A Query.
  • collector - A Collector.

fetch_doc

my $hit_doc = $index_searcher->fetch_doc($doc_id);

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

  • doc_id - A document id.

get_reader

my $index_reader = $index_searcher->get_reader();

Accessor for the object’s reader member.

INHERITANCE

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