Hi I am perl newbie, i am trying to achieve aggregation in Perl. Here is representative of what i wan tto achieve i.e. pass reference of a class (Person) to another class (Updater) and call Person (updateName)method using the passed reference, but when i try to do so i get "Not a HASH reference at" error. I tried few things but no use, niether could find similar code anywhere. 
package Person;

use strict;
use warnings;

sub new {
    my $class = shift;
    my $self = {};

    $self->{NAME} = shift;
    bless ($self, $class);
    return $self;
  }
  
sub getPerson {
  my $o = Person->new ("TestName");
  return $o;
}

sub createUpdater {
  my $self = shift;  
  my $o = Person2->new (\$self);
  return $o;
}

#Accessor
sub Name {
  $_[0]->{NAME}=$_[1] if defined $_[1]; 
  $_[0]->{NAME};
}


package Updater;
use strict;
use warnings;

sub new {
    my $class = shift;
    my $self = {};
    $self->{Person} = \shift;
    bless ($self, $class);
    return $self;
  }
  
sub updateName {
  my $self = shift;
  #my $pe1 = \$self->{Person};
  #bless ($pe1, "Person");
  my $pe1 = $self->{Person};
  $self->{NAME} = $pe1->Name;
}

1;

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In reply to Aggregation problem by pankajisgarg

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