++ed by:
NWELLNHOF ZMUGHAL MARKELLIS CKRAS EMAZEP

9 PAUSE users
6 non-PAUSE users.

Nick Wellnhofer
and 1 contributors

NAME

Lucy::Search::NOTQuery - Invert the result set of another Query.

SYNOPSIS

    my $not_bar_query = Lucy::Search::NOTQuery->new( 
        negated_query => $bar_query,
    );
    my $foo_and_not_bar_query = Lucy::Search::ANDQuery->new(
        children => [ $foo_query, $not_bar_query ].
    );
    my $hits = $searcher->hits( query => $foo_and_not_bar_query );
    ...

DESCRIPTION

A NOTQuery wraps another Query and matches against its inverse document set. All matching docs recieve a score of 0.0.

NOTQuery is often used in conjunction with ANDQuery to provide “a AND NOT b” semantics.

CONSTRUCTORS

new

    my $not_query = Lucy::Search::NOTQuery->new( 
        negated_query => $query,
    );

Create a new NOTQuery.

  • negated_query - The Query whose result set should be inverted.

METHODS

get_negated_query

    my $query = $not_query->get_negated_query();

Accessor for the object’s negated query.

set_negated_query

    $not_query->set_negated_query($negated_query);

Setter for the object’s negated query.

make_compiler

    my $compiler = $not_query->make_compiler(
        searcher    => $searcher     # required
        boost       => $boost        # required
        subordinate => $subordinate  # default: false
    );

Abstract factory method returning a Compiler derived from this Query.

  • searcher - A Searcher.

  • boost - A scoring multiplier.

  • subordinate - Indicates whether the Query is a subquery (as opposed to a top-level query). If false, the implementation must invoke normalize() on the newly minted Compiler object before returning it.

INHERITANCE

Lucy::Search::NOTQuery isa Lucy::Search::PolyQuery isa Lucy::Search::Query isa Clownfish::Obj.