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=head1 NAME
Lucy::Search::LeafQuery - Leaf node in a tree created by QueryParser.
=head1 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);
}
}
=head1 DESCRIPTION
LeafQuery objects serve as leaf nodes in the tree structure generated by
L<QueryParser|Lucy::Search::QueryParser>'s tree() method.
Ultimately, they must be transformed, typically into either
L<TermQuery|Lucy::Search::TermQuery> or
L<PhraseQuery|Lucy::Search::PhraseQuery> objects, as attempting to
search a LeafQuery causes an error.
=head1 CONSTRUCTORS
=head2 new( I<[labeled params]> )
my $leaf_query = Lucy::Search::LeafQuery->new(
text => '"three blind mice"', # required
field => 'content', # default: undef
);
=over
=item *
B<field> - Optional field name.
=item *
B<text> - Raw query text.
=back
=head1 METHODS
=head2 get_field()
Accessor for object's C<< field >> attribute.
=head2 get_text()
Accessor for object's C<< text >> attribute.
=head1 INHERITANCE
Lucy::Search::LeafQuery isa L<Lucy::Search::Query> isa Clownfish::Obj.
=cut