I'll give a concrete example to make clear what I mean:

package FileParser;

use parent qw ( Dondley::WestfieldVote::FileCollector );

sub get_data {
  my $s = shift;
  return $s->get_obj_prop('data', 'raw_data', $_[0]);
}

package FileCollector;

sub get_obj_prop {
  my $s    = shift;
  my $obj  = shift;
  my $prop = shift;
  my $file = shift || $s->selected_file;  # grabs the current file in 
+iterator

  if (!$prop || !$obj || !$file) {
    $s->_croak ("Missing arguments to get_obj_prop method"
      . ' at ' .  (caller(0))[1] . ', line ' . (caller(0))[2] );
  }

  my $o = $obj . '_obj';
  my $object = $s->{_files}{$file}{$o};
  my $attr = "_$prop";
  if (! exists $object->{$attr} ) {
    $s->croak ("Non-existent $obj object attribute requested: '$prop'"
      . ' at ' .  (caller(0))[1] . ', line ' . (caller(0))[2] );
  }
  my $value = $object->{$attr};
  if (ref $value eq 'ARRAY') {
    return @$value;
  } else {
    return $value;
  }
}

package Data.pm

sub new {
  my $class = shift;
  my $data  = shift;

  my $obj   = bless {
    _raw_data            => $data, # raw Spreadsheet::Read object
    _stripped_data       => undef,
    _num_rows            => undef,
    _cols                => undef,
    _num_cols            => undef,
    _non_blank_cols      => undef,
    _first_row           => undef,
  }, $class;

  return $obj;
}

# And finally, in a file:

my $fp = FileParser->new('some/dir');
while ($fp->next_parseable_file) {
  my $data = $fp->get_data;
}
[download]

This seems super convenient. If I'm not using an iterator, I can just pass a file to the get_data() method.

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