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Encapsulation of an object means you should never access attributes directly but use accessors and mutators(getters and setters).

One exceedling cool way to do this which I think I can credit to someone from this site(please correct me if not) is with Autoload.

If you put the following code into your class it automagically creates get_attributename() and set_attributename() methods dynamically at runtime. So you dont have to manually write 2 methods for every attribute. If you make a typo when accessing an attribute you get a nice error message saying that no method exists.

sub AUTOLOAD { # AUTOLOAD object accessor/mutator method no strict "refs"; # allow me access to the symbol table my ($self,$newval) = @_; return if $AUTOLOAD =~ /::DESTROY$/o; # let perl handle its own cl +ean up if ($AUTOLOAD =~/.*::get(_\w+)/ && $self->_accessible($1, 'read')) +{ my $attr_name = $1; *{$AUTOLOAD} = sub{ return $_[0]->{$attr_name}; }; # Creates a +n encapsulated method in the symbol table return $self->{$attr_name}; } # determine set or get method if ($AUTOLOAD =~/.*::set(_\w+)/ && $self->_accessible($1, 'write') +){ my $attr_name = $1; *{$AUTOLOAD} = sub{ return $_[0]->{$attr_name}=$_[1]; }; return $self->{$attr_name}=$newval; } # no method for this object attribute die "No such method!: $AUTOLOAD"; }

In reply to Re: Should I use Fields, InsideOuts, or Properties? by hakkr
in thread Should I use Fields, InsideOuts, or Properties? by tphyahoo

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