package Mouse::Meta::Attribute;
-use strict;
-use warnings;
+use Mouse::Util qw(:meta); # enables strict and warnings
use Carp ();
-use Mouse::Util qw(:meta);
-
use Mouse::Meta::TypeConstraint;
use Mouse::Meta::Method::Accessor;
+
sub _process_options{
my($class, $name, $args) = @_;
$args{name} = $name;
- my $instance = bless \%args, $class;
+ my $self = bless \%args, $class;
# extra attributes
if($class ne __PACKAGE__){
- $class->meta->_initialize_instance($instance,\%args);
+ $class->meta->_initialize_object($self, \%args);
}
# XXX: there is no fast way to check attribute validity
# Carp::cluck("Found unknown argument(s) passed to '$name' attribute constructor in '$class': @bad");
# }
- return $instance;
+ return $self;
}
# readers
sub should_auto_deref { $_[0]->{auto_deref} }
sub should_coerce { $_[0]->{coerce} }
-sub get_read_method { $_[0]->{reader} || $_[0]->{accessor} }
-sub get_write_method { $_[0]->{writer} || $_[0]->{accessor} }
-
# predicates
sub has_accessor { exists $_[0]->{accessor} }
sub has_read_method { exists $_[0]->{reader} || exists $_[0]->{accessor} }
sub has_write_method { exists $_[0]->{writer} || exists $_[0]->{accessor} }
-sub _create_args {
+sub _create_args { # DEPRECATED
$_[0]->{_create_args} = $_[1] if @_ > 1;
$_[0]->{_create_args}
}
sub interpolate_class{
- my($class, $name, $args) = @_;
+ my($class, $args) = @_;
if(my $metaclass = delete $args->{metaclass}){
$class = Mouse::Util::resolve_metaclass_alias( Attribute => $metaclass );
return( $class, @traits );
}
-sub canonicalize_args{
+sub canonicalize_args{ # DEPRECATED
my ($self, $name, %args) = @_;
Carp::cluck("$self->canonicalize_args has been deprecated."
$self->throw_error("Attribute ($name) does not pass the type constraint because: " . $type->get_message($value));
}
-sub coerce_constraint { ## my($self, $value) = @_;
+sub coerce_constraint { # DEPRECATED
my $type = $_[0]->{type_constraint}
or return $_[1];
return Mouse::Util::TypeConstraints->typecast_constraints($_[0]->associated_class->name, $type, $_[1]);
}
-sub _canonicalize_handles {
- my $self = shift;
- my $handles = shift;
-
- if (ref($handles) eq 'HASH') {
- return %$handles;
- }
- elsif (ref($handles) eq 'ARRAY') {
- return map { $_ => $_ } @$handles;
- }
- else {
- $self->throw_error("Unable to canonicalize the 'handles' option with $handles");
- }
-}
-
sub clone_and_inherit_options{
- my $self = shift;
- my $name = shift;
+ my($self, %args) = @_;
- return ref($self)->new($name, %{$self}, (@_ == 1) ? %{$_[0]} : @_);
+ my($attribute_class, @traits) = ref($self)->interpolate_class(\%args);
+
+ $args{traits} = \@traits if @traits;
+ return $attribute_class->new($self->name, %{$self}, %args);
}
-sub clone_parent {
+sub clone_parent { # DEPRECATED
my $self = shift;
my $class = shift;
my $name = shift;
$self->clone_and_inherited_args($class, $name, %args);
}
-sub get_parent_args {
+sub get_parent_args { # DEPRECATED
my $self = shift;
my $class = shift;
my $name = shift;
$self->throw_error("Could not find an attribute by the name of '$name' to inherit from");
}
+
+sub get_read_method { # DEPRECATED
+ $_[0]->{reader} || $_[0]->{accessor}
+}
+sub get_write_method { # DEPRECATED
+ $_[0]->{writer} || $_[0]->{accessor}
+}
+
+sub get_read_method_ref{
+ my($self) = @_;
+
+ $self->{_read_method_ref} ||= do{
+ my $metaclass = $self->associated_class
+ or $self->throw_error('No asocciated class for ' . $self->name);
+
+ my $reader = $self->{reader} || $self->{accessor};
+ if($reader){
+ $metaclass->name->can($reader);
+ }
+ else{
+ $self->accessor_metaclass->_generate_reader($self, $metaclass);
+ }
+ };
+}
+
+sub get_write_method_ref{
+ my($self) = @_;
+
+ $self->{_write_method_ref} ||= do{
+ my $metaclass = $self->associated_class
+ or $self->throw_error('No asocciated class for ' . $self->name);
+
+ my $reader = $self->{writer} || $self->{accessor};
+ if($reader){
+ $metaclass->name->can($reader);
+ }
+ else{
+ $self->accessor_metaclass->_generate_writer($self, $metaclass);
+ }
+ };
+}
+
+sub _canonicalize_handles {
+ my($self, $handles) = @_;
+
+ if (ref($handles) eq 'HASH') {
+ return %$handles;
+ }
+ elsif (ref($handles) eq 'ARRAY') {
+ return map { $_ => $_ } @$handles;
+ }
+ else {
+ $self->throw_error("Unable to canonicalize the 'handles' option with $handles");
+ }
+}
+
+
sub associate_method{
my ($attribute, $method) = @_;
$attribute->{associated_methods}++;
return;
}
+sub accessor_metaclass(){ 'Mouse::Meta::Method::Accessor' }
+
sub install_accessors{
my($attribute) = @_;
- my $metaclass = $attribute->{associated_class};
+ my $metaclass = $attribute->{associated_class};
+ my $accessor_class = $attribute->accessor_metaclass;
- foreach my $type(qw(accessor reader writer predicate clearer handles)){
+ foreach my $type(qw(accessor reader writer predicate clearer)){
if(exists $attribute->{$type}){
- my $installer = '_install_' . $type;
+ my $generator = '_generate_' . $type;
+ my $code = $accessor_class->$generator($attribute, $metaclass);
+ $metaclass->add_method($attribute->{$type} => $code);
+ $attribute->associate_method($code);
+ }
+ }
- Mouse::Meta::Method::Accessor->$installer($attribute, $attribute->{$type}, $metaclass);
+ # install delegation
+ if(exists $attribute->{handles}){
+ my %handles = $attribute->_canonicalize_handles($attribute->{handles});
+ my $reader = $attribute->get_read_method_ref;
- $attribute->{associated_methods}++;
+ while(my($handle_name, $method_to_call) = each %handles){
+ my $code = $accessor_class->_generate_delegation($attribute, $metaclass,
+ $reader, $handle_name, $method_to_call);
+
+ $metaclass->add_method($handle_name => $code);
+ $attribute->associate_method($code);
}
}
+
if($attribute->can('create') != \&create){
# backword compatibility
$attribute->create($metaclass, $attribute->name, %{$attribute});
Creates a new attribute in the owner class, inheriting options from parent classes.
Accessors and helper methods are installed. Some error checking is done.
+=head2 C<< get_read_method_ref >>\r
+\r
+=head2 C<< get_write_method_ref >>\r
+\r
+Returns the subroutine reference of a method suitable for reading or\r
+writing the attribute's value in the associated class. These methods\r
+always return a subroutine reference, regardless of whether or not the\r
+attribute is read- or write-only.
+
=head1 SEE ALSO
L<Moose::Meta::Attribute>
projects / gitmo/Mouse.git / blobdiff