use strict;
use warnings;
use Carp;
-use Class::ISA;
-use Scalar::Util qw/blessed reftype/;
+use Class::Inspector ();
+use Scalar::Util qw/reftype blessed/;
+use MRO::Compat;
+
use vars qw($VERSION);
-$VERSION = '0.01';
+$VERSION = '0.07000';
=head1 NAME
-Class:Accessor::Grouped- Lets you build groups of accessors
+Class::Accessor::Grouped - Lets you build groups of accessors
=head1 SYNOPSIS
$group is the name of the accessor group for the generated accessors; they
will call get_$group($field) on get and set_$group($field, $value) on set.
+If you want to mimic Class::Accessor's mk_accessors $group has to be 'simple'
+to tell Class::Accessor::Grouped to use its own get_simple and set_simple
+methods.
+
@fieldspec is a list of field/accessor names; if a fieldspec is a scalar
this is used as both field and accessor name, if a listref it is expected to
be of the form [ $accessor, $field ].
sub _mk_group_accessors {
my($self, $maker, $group, @fields) = @_;
- my $class = ref $self || $self;
+ my $class = blessed $self || $self;
# So we don't have to do lots of lookups inside the loop.
$maker = $self->can($maker) unless ref $maker;
my $accessor = $self->$maker($group, $field);
my $alias = "_${name}_accessor";
- #warn "$class $group $field $alias";
-
*{$class."\:\:$name"} = $accessor;
#unless defined &{$class."\:\:$field"}
=back
-Simple getter for Classes and hash-based objects which returns the value for the field name passed as
-an argument. This behaves much like L<Class::Data::Accessor> where the field can be set in a
-base class, inherited and changed in subclasses, and inherited and changed for object instances.
+Simple getter for Classes and hash-based objects which returns the value for
+the field name passed as an argument. This behaves much like
+L<Class::Data::Accessor> where the field can be set in a base class,
+inherited and changed in subclasses, and inherited and changed for object
+instances.
=cut
sub get_inherited {
my ($self, $get) = @_;
+ my $class;
if (blessed $self) {
- if (reftype($self) eq 'HASH' && exists $self->{$get}) {
+ my $reftype = reftype $self;
+ $class = ref $self;
+
+ if ($reftype eq 'HASH' && exists $self->{$get}) {
return $self->{$get};
- } elsif (reftype($self) ne 'HASH') {
+ } elsif ($reftype ne 'HASH') {
croak('Cannot get inherited value on an object instance that is not hash-based');
};
+ } else {
+ $class = $self;
};
no strict 'refs';
+ return ${$class.'::__cag_'.$get} if defined(${$class.'::__cag_'.$get});
+
+ if (!@{$class.'::__cag_supers'}) {
+ @{$class.'::__cag_supers'} = $self->get_super_paths;
+ };
- my @supers = Class::ISA::self_and_super_path(ref $self || $self);
- foreach (@supers) {
- return ${$_.'::_'.$get} if defined(${$_.'::_'.$get});
+ foreach (@{$class.'::__cag_supers'}) {
+ return ${$_.'::__cag_'.$get} if defined(${$_.'::__cag_'.$get});
};
+
+ return undef;
}
=head2 set_inherited
=back
-Simple setter for Classes and hash-based objects which sets and then returns the value
-for the field name passed as an argument. When called on a hash-based object it will set the appropriate
-hash key value. When called on a class, it will set a class level variable.
+Simple setter for Classes and hash-based objects which sets and then returns
+the value for the field name passed as an argument. When called on a hash-based
+object it will set the appropriate hash key value. When called on a class, it
+will set a class level variable.
-B<Note:>: This method will die if you try to set an object variable on a non hash-based object.
+B<Note:>: This method will die if you try to set an object variable on a non
+hash-based object.
=cut
my ($self, $set, $val) = @_;
if (blessed $self) {
- if (reftype($self) eq 'HASH') {
+ if (reftype $self eq 'HASH') {
return $self->{$set} = $val;
} else {
croak('Cannot set inherited value on an object instance that is not hash-based');
} else {
no strict 'refs';
- return ${$self.'::_'.$set} = $val;
+ return ${$self.'::__cag_'.$set} = $val;
};
}
+=head2 get_component_class
+
+=over 4
+
+=item Arguments: $field
+
+Returns: $value
+
+=back
+
+Gets the value of the specified component class.
+
+ __PACKAGE__->mk_group_accessors('component_class' => 'result_class');
+
+ $self->result_class->method();
+
+ ## same as
+ $self->get_component_class('result_class')->method();
+
+=cut
+
+sub get_component_class {
+ my ($self, $field) = @_;
+
+ return $self->get_inherited($field);
+};
+
+=head2 set_component_class
+
+=over 4
+
+=item Arguments: $field, $class
+
+Returns: $new_value
+
+=back
+
+Inherited accessor that automatically loads the specified class before setting
+it. This method will die if the specified class could not be loaded.
+
+ __PACKAGE__->mk_group_accessors('component_class' => 'result_class');
+ __PACKAGE__->result_class('MyClass');
+
+ $self->result_class->method();
+
+=cut
+
+sub set_component_class {
+ my ($self, $field, $value) = @_;
+
+ if ($value) {
+ local $^W = 0;
+ if (Class::Inspector->installed($value) && !Class::Inspector->loaded($value)) {
+ eval "use $value";
+
+ croak("Could not load $field '$value': ", $@) if $@;
+ };
+ };
+
+ return $self->set_inherited($field, $value);
+};
+
+=head2 get_super_paths
+
+Returns a list of 'parent' or 'super' class names that the current class inherited from.
+
+=cut
+
+sub get_super_paths {
+ my $class = blessed $_[0] || $_[0];
+
+ return @{mro::get_linear_isa($class)};
+};
+
1;
=head1 AUTHORS
Matt S. Trout <mst@shadowcatsystems.co.uk>
+Christopher H. Laco <claco@chrislaco.com>
=head1 LICENSE
projects / p5sagit/Class-Accessor-Grouped.git / blobdiff