use Carp ();
use Mouse::Meta::TypeConstraint;
-use Mouse::Meta::Method::Accessor;
-
sub _process_options{
my($class, $name, $args) = @_;
-
# XXX: for backward compatibility (with method modifiers)
if($class->can('canonicalize_args') != \&canonicalize_args){
%{$args} = $class->canonicalize_args($name, %{$args});
return $self;
}
-# readers
-
-sub name { $_[0]->{name} }
-sub associated_class { $_[0]->{associated_class} }
-
-sub accessor { $_[0]->{accessor} }
-sub reader { $_[0]->{reader} }
-sub writer { $_[0]->{writer} }
-sub predicate { $_[0]->{predicate} }
-sub clearer { $_[0]->{clearer} }
-sub handles { $_[0]->{handles} }
-
-sub _is_metadata { $_[0]->{is} }
-sub is_required { $_[0]->{required} }
-sub default { $_[0]->{default} }
-sub is_lazy { $_[0]->{lazy} }
-sub is_lazy_build { $_[0]->{lazy_build} }
-sub is_weak_ref { $_[0]->{weak_ref} }
-sub init_arg { $_[0]->{init_arg} }
-sub type_constraint { $_[0]->{type_constraint} }
-
-sub trigger { $_[0]->{trigger} }
-sub builder { $_[0]->{builder} }
-sub should_auto_deref { $_[0]->{auto_deref} }
-sub should_coerce { $_[0]->{coerce} }
-
-# predicates
-
-sub has_accessor { exists $_[0]->{accessor} }
-sub has_reader { exists $_[0]->{reader} }
-sub has_writer { exists $_[0]->{writer} }
-sub has_predicate { exists $_[0]->{predicate} }
-sub has_clearer { exists $_[0]->{clearer} }
-sub has_handles { exists $_[0]->{handles} }
-
-sub has_default { exists $_[0]->{default} }
-sub has_type_constraint { exists $_[0]->{type_constraint} }
-sub has_trigger { exists $_[0]->{trigger} }
-sub has_builder { exists $_[0]->{builder} }
-
-sub has_read_method { exists $_[0]->{reader} || exists $_[0]->{accessor} }
-sub has_write_method { exists $_[0]->{writer} || exists $_[0]->{accessor} }
+sub has_read_method { $_[0]->has_reader || $_[0]->has_accessor }
+sub has_write_method { $_[0]->has_writer || $_[0]->has_accessor }
sub _create_args { # DEPRECATED
$_[0]->{_create_args} = $_[1] if @_ > 1;
Carp::cluck("$self->canonicalize_args has been deprecated."
. "Use \$self->_process_options instead.")
- if _MOUSE_VERBOSE;
+ if Mouse::Util::_MOUSE_VERBOSE;
return %args;
}
-sub create {
+sub create { # DEPRECATED
my ($self, $class, $name, %args) = @_;
Carp::cluck("$self->create has been deprecated."
. "Use \$meta->add_attribute and \$attr->install_accessors instead.")
- if _MOUSE_VERBOSE;
+ if Mouse::Util::_MOUSE_VERBOSE;
# noop
return $self;
my($self, $value, $instance) = @_;
my $type_constraint = $self->{type_constraint};
-
- return $value if !$type_constraint;
+ return $value if !defined $type_constraint;
if ($self->should_coerce && $type_constraint->has_coercion) {
$value = $type_constraint->coerce($value);
}
- return $value if $type_constraint->check($value);
-
$self->verify_against_type_constraint($value);
return $value;
my ($self, $value) = @_;
my $type_constraint = $self->{type_constraint};
- return 1 if !$type_constraint;;
+ return 1 if !$type_constraint;
return 1 if $type_constraint->check($value);
$self->verify_type_constraint_error($self->name, $value, $type_constraint);
sub verify_type_constraint_error {
my($self, $name, $value, $type) = @_;
- $self->throw_error("Attribute ($name) does not pass the type constraint because: " . $type->get_message($value));
+ $self->throw_error("Attribute ($name) does not pass the type constraint because: "
+ . $type->get_message($value));
}
sub coerce_constraint { # DEPRECATED
my($attribute_class, @traits) = ref($self)->interpolate_class(\%args);
$args{traits} = \@traits if @traits;
- return $attribute_class->new($self->name, %{$self}, %args);
+ # do not inherit the 'handles' attribute
+ foreach my $name(keys %{$self}){
+ if(!exists $args{$name} && $name ne 'handles'){
+ $args{$name} = $self->{$name};
+ }
+ }
+ return $attribute_class->new($self->name, %args);
}
sub clone_parent { # DEPRECATED
Carp::cluck("$self->clone_parent has been deprecated."
. "Use \$meta->add_attribute and \$attr->install_accessors instead.")
- if _MOUSE_VERBOSE;
+ if Mouse::Util::_MOUSE_VERBOSE;
$self->clone_and_inherited_args($class, $name, %args);
}
sub get_read_method {
- $_[0]->{reader} || $_[0]->{accessor}
+ return $_[0]->reader || $_[0]->accessor
}
sub get_write_method {
- $_[0]->{writer} || $_[0]->{accessor}
+ return $_[0]->writer || $_[0]->accessor
}
-sub get_read_method_ref{
- my($self) = @_;
+sub _get_accessor_method_ref {
+ my($self, $type, $generator) = @_;
- $self->{_read_method_ref} ||= do{
- my $metaclass = $self->associated_class
- or $self->throw_error('No asocciated class for ' . $self->name);
+ my $metaclass = $self->associated_class
+ || $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);
- }
- };
+ my $accessor = $self->$type();
+ if($accessor){
+ return $metaclass->get_method_body($accessor);
+ }
+ else{
+ return $self->accessor_metaclass->$generator($self, $metaclass);
+ }
+}
+
+sub get_read_method_ref{
+ my($self) = @_;
+ return $self->{_read_method_ref} ||= $self->_get_accessor_method_ref('get_read_method', '_generate_reader');
}
sub get_write_method_ref{
my($self) = @_;
+ return $self->{_write_method_ref} ||= $self->_get_accessor_method_ref('get_write_method', '_generate_writer');
+}
+
+sub set_value {
+ my($self, $object, $value) = @_;
+ return $self->get_write_method_ref()->($object, $value);
+}
- $self->{_write_method_ref} ||= do{
- my $metaclass = $self->associated_class
- or $self->throw_error('No asocciated class for ' . $self->name);
+sub get_value {
+ my($self, $object) = @_;
+ return $self->get_read_method_ref()->($object);
+}
- my $reader = $self->{writer} || $self->{accessor};
- if($reader){
- $metaclass->name->can($reader);
- }
- else{
- $self->accessor_metaclass->_generate_writer($self, $metaclass);
- }
- };
+sub has_value {
+ my($self, $object) = @_;
+ my $accessor_ref = $self->{_predicate_ref}
+ ||= $self->_get_accessor_method_ref('predicate', '_generate_predicate');
+
+ return $accessor_ref->($object);
}
+sub clear_value {
+ my($self, $object) = @_;
+ my $accessor_ref = $self->{_crealer_ref}
+ ||= $self->_get_accessor_method_ref('clearer', '_generate_clearer');
+
+ return $accessor_ref->($object);
+}
+
+
sub _canonicalize_handles {
my($self, $handles) = @_;
elsif (ref($handles) eq 'ARRAY') {
return map { $_ => $_ } @$handles;
}
+ elsif (ref($handles) eq 'Regexp') {
+ my $class_or_role = ($self->{isa} || $self->{does})
+ || $self->throw_error("Cannot delegate methods based on a Regexp without a type constraint (isa)");
+
+ my $meta = Mouse::Meta::Class->initialize("$class_or_role"); # "" for stringify
+ return map { $_ => $_ }
+ grep { !Mouse::Object->can($_) && $_ =~ $handles }
+ Mouse::Util::is_a_metarole($meta)
+ ? $meta->get_method_list
+ : $meta->get_all_method_names;
+ }
else {
$self->throw_error("Unable to canonicalize the 'handles' option with $handles");
}
}
-
sub associate_method{
- my ($attribute, $method) = @_;
+ my ($attribute, $method_name) = @_;
$attribute->{associated_methods}++;
return;
}
-sub accessor_metaclass(){ 'Mouse::Meta::Method::Accessor' }
+sub delegation_metaclass() { 'Mouse::Meta::Method::Delegation' }
sub install_accessors{
my($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)){
my $generator = '_generate_' . $type;
my $code = $accessor_class->$generator($attribute, $metaclass);
$metaclass->add_method($attribute->{$type} => $code);
- $attribute->associate_method($code);
+ $attribute->associate_method($attribute->{$type});
}
}
# install delegation
if(exists $attribute->{handles}){
+ my $delegation_class = $attribute->delegation_metaclass;
my %handles = $attribute->_canonicalize_handles($attribute->{handles});
my $reader = $attribute->get_read_method_ref;
+ Mouse::Util::load_class($delegation_class);
+
while(my($handle_name, $method_to_call) = each %handles){
- my $code = $accessor_class->_generate_delegation($attribute, $metaclass,
+ my $code = $delegation_class->_generate_delegation($attribute, $metaclass,
$reader, $handle_name, $method_to_call);
$metaclass->add_method($handle_name => $code);
- $attribute->associate_method($code);
+ $attribute->associate_method($handle_name);
}
}
-
if($attribute->can('create') != \&create){
# backword compatibility
$attribute->create($metaclass, $attribute->name, %{$attribute});
}
1;
-
__END__
=head1 NAME
Mouse::Meta::Attribute - The Mouse attribute metaclass
+=head1 VERSION
+
+This document describes Mouse version 0.44
+
=head1 METHODS
=head2 C<< new(%options) -> Mouse::Meta::Attribute >>
=back
-=head2 C<< associate_method(Method) >>
+=head2 C<< associate_method(MethodName) >>
Associates a method with the attribute. Typically, this is called internally
when an attribute generates its accessors.
-Currently the argument I<Method> is ignored in Mouse.
+Currently the argument I<MethodName> is ignored in Mouse.
=head2 C<< verify_against_type_constraint(Item) -> TRUE | ERROR >>
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
+=head2 C<< get_read_method_ref >>
+
+=head2 C<< get_write_method_ref >>
+
+Returns the subroutine reference of a method suitable for reading or
+writing the attribute's value in the associated class. These methods
+always return a subroutine reference, regardless of whether or not the
attribute is read- or write-only.
=head1 SEE ALSO
projects / gitmo/Mouse.git / blobdiff