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Lucy::Search::LeafQuery – Apache Lucy Documentation
Apache Lucy™

NAME

Lucy::Search::LeafQuery - Leaf node in a tree created by QueryParser.

SYNOPSIS

package MyQueryParser;
use base qw( Lucy::Search::QueryParser );

sub expand_leaf {
    my ( $self, $leaf_query ) = @_;
    if ( $leaf_query->get_text =~ /.\*\s*$/ ) {
        return PrefixQuery->new(
            query_string => $leaf_query->get_text,
            field        => $leaf_query->get_field,
        );
    }
    else {
        return $self->SUPER::expand_leaf($leaf_query);
    }
}

DESCRIPTION

LeafQuery objects serve as leaf nodes in the tree structure generated by QueryParser’s tree() method. Ultimately, they must be transformed, typically into either TermQuery or PhraseQuery objects, as attempting to search a LeafQuery causes an error.

CONSTRUCTORS

new

my $leaf_query = Lucy::Search::LeafQuery->new(
    text  => '"three blind mice"',    # required
    field => 'content',               # default: undef
);

Create a new LeafQuery.

  • field - Optional field name.
  • text - Raw query text.

METHODS

get_field

my $string = $leaf_query->get_field();

Accessor for object’s field attribute.

get_text

my $string = $leaf_query->get_text();

Accessor for object’s text attribute.

make_compiler

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

Throws an error.

INHERITANCE

Lucy::Search::LeafQuery isa Lucy::Search::Query isa Clownfish::Obj.