SYNOPSIS

sub walk {
my $query = shift;
if ( $query->isa("Lucy::Search::PolyQuery") ) {
if ( $query->isa("Lucy::Search::ORQuery") ) { ... }
elsif ( $query->isa("Lucy::Search::ANDQuery") ) { ... }
elsif ( $query->isa("Lucy::Search::RequiredOptionalQuery") ) {
...
}
elsif ( $query->isa("Lucy::Search::NOTQuery") ) { ... }
}
else { ... }
}

DESCRIPTION

PolyQuery serves as a shared base class for ANDQuery, ORQuery, NOTQuery, and RequiredOptionalQuery. All of these classes may serve as nodes in composite Query with a tree structure which may be walked.

INHERITANCE

Lucy::Search::PolyQuery isa Lucy::Search::Query isa Lucy::Object::Obj.