NAME

Lucy::Search::NoMatchQuery - Query which matches no documents.

DESCRIPTION

NoMatchQuery is a utility class representing a query which matches nothing. Typical usage might include e.g. returning a NoMatchQuery when a QueryParser is asked to parse an empty string.

CONSTRUCTORS

new

            

              
              
my $no_match_query = Lucy::Search::NoMatchQuery->new;
            
          

Constructor. Takes no arguments.

METHODS

make_compiler

            

              
              
my $compiler = $no_match_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::NoMatchQuery isa Lucy::Search::Query isa Clownfish::Obj.