[Bioperl-l] How to determine match type from Bio::Coordinate::GeneMapper

[Ryan]

Hi - I'm using Bio::Coordinate::GeneMapper to map from CDS to Gene
Coordinates.  I'm using the example given in the code:

# Collection representing exons
#  cds    1   5     6   10    11  15
#  exon   1   5     1   5     1   5
#  gene   1   5    11   15   21   25
#         |---|     |---|     |---|
#-----|-----------------------|---|--
# chr 1   5   9    15   19   25   29
#         pair1     pair2     pair3

If I map cds(1-5) -> gene(1-5), the first 5 bases of the cds map to
the first 5 bases of the gene, as expected.

my $cds_pos = Bio::Location::Simple->new(-start => 1, -end => 5, -
strand => 1);
my $gen_pos = $m->map($cds_pos);
is ($gen_pos->start, 1);
is ($gen_pos->end, 5);

If I map cds(6-11) -> gene(11-21), I get 2 sublocations
$cds_pos = Bio::Location::Simple->new(-start => 6, -end => 11, -strand
=> 1);
my $gen_pos_split = $m->map($cds_pos);
is ($gen_pos_split->start, 11);
is ($gen_pos_split->end, 21);

My question is, how do I determine, after mapping, that my result is
in ONE consecutive location, or in multiple locations?  I can't figure
this out from the documentation on Bio::Coordinate::GeneMapper or
Bio::Coordinate::Result.