package DBIx::Class::AccessorGroup;
use strict;
use warnings;
use NEXT;
=head1 NAME
DBIx::Class::AccessorGroup - Lets you build groups of accessors
=head1 SYNOPSIS
=head1 DESCRIPTION
This class lets you build groups of accessors that will call different
getters and setters.
=head1 METHODS
=over 4
=cut
sub mk_group_accessors {
my($self, $group, @fields) = @_;
$self->_mk_group_accessors('make_group_accessor', $group, @fields);
}
{
no strict 'refs';
no warnings 'redefine';
sub _mk_group_accessors {
my($self, $maker, $group, @fields) = @_;
my $class = ref $self || $self;
# So we don't have to do lots of lookups inside the loop.
$maker = $self->can($maker) unless ref $maker;
foreach my $field (@fields) {
if( $field eq 'DESTROY' ) {
require Carp;
&Carp::carp("Having a data accessor named DESTROY in ".
"'$class' is unwise.");
}
my $name = $field;
($name, $field) = @$field if ref $field;
my $accessor = $self->$maker($group, $field);
my $alias = "_${name}_accessor";
#warn "$class $group $field $alias";
*{$class."\:\:$name"} = $accessor;
#unless defined &{$class."\:\:$field"}
*{$class."\:\:$alias"} = $accessor;
#unless defined &{$class."\:\:$alias"}
}
}
}
sub mk_group_ro_accessors {
my($self, $group, @fields) = @_;
$self->_mk_group_accessors('make_group_ro_accessor', $group, @fields);
}
sub mk_group_wo_accessors {
my($self, $group, @fields) = @_;
$self->_mk_group_accessors('make_group_wo_accessor', $group, @fields);
}
sub make_group_accessor {
my ($class, $group, $field) = @_;
my $set = "set_$group";
my $get = "get_$group";
# Build a closure around $field.
return sub {
my $self = shift;
if(@_) {
return $self->$set($field, @_);
}
else {
return $self->$get($field);
}
};
}
sub make_group_ro_accessor {
my($class, $group, $field) = @_;
my $get = "get_$group";
return sub {
my $self = shift;
if(@_) {
my $caller = caller;
require Carp;
Carp::croak("'$caller' cannot alter the value of '$field' on ".
"objects of class '$class'");
}
else {
return $self->$get($field);
}
};
}
sub make_group_wo_accessor {
my($class, $group, $field) = @_;
my $set = "set_$group";
return sub {
my $self = shift;
unless (@_) {
my $caller = caller;
require Carp;
Carp::croak("'$caller' cannot access the value of '$field' on ".
"objects of class '$class'");
}
else {
return $self->$set($field, @_);
}
};
}
1;
=back
=head1 AUTHORS
Matt S. Trout <mst@shadowcatsystems.co.uk>
=head1 LICENSE
You may distribute this code under the same terms as Perl itself.
=cut