return $self->SUPER::has_method($method_name);
}
-sub add_attribute {
- my ($self, $name, %params) = @_;
-
- my @delegations;
- if ( my $delegation = delete $params{handles} ) {
- my @method_names_or_hashes = $self->compute_delegation( $name, $delegation, \%params );
- @delegations = $self->get_delegatable_methods( @method_names_or_hashes );
- }
-
- my $ret = $self->SUPER::add_attribute( $name, %params );
-
- if ( @delegations ) {
- my $attr = $self->get_attribute( $name );
- $self->generate_delgate_method( $attr, $_ ) for $self->filter_delegations( $attr, @delegations );
- }
-
- return $ret;
-}
-
-sub filter_delegations {
- my ( $self, $attr, @delegations ) = @_;
- grep {
- my $new_name = $_->{new_name} || $_->{name};
- no warnings "uninitialized";
- $_->{no_filter} or (
- !$self->name->can( $new_name ) and
- $attr->accessor ne $new_name and
- $attr->reader ne $new_name and
- $attr->writer ne $new_name
- );
- } @delegations;
-}
-
-sub generate_delgate_method {
- my ( $self, $attr, $method ) = @_;
-
- # FIXME like generated accessors these methods must be regenerated
- # FIXME the reader may not work for subclasses with weird instances
-
- my $make = $method->{generator} || sub {
- my ( $self, $attr, $method ) = @_;
-
- my $method_name = $method->{name};
- my $reader = $attr->generate_reader_method();
-
- return sub {
- if ( Scalar::Util::blessed( my $delegate = shift->$reader ) ) {
- return $delegate->$method_name( @_ );
- }
- return;
- };
- };
-
- my $new_name = $method->{new_name} || $method->{name};
- $self->add_method( $new_name, $make->( $self, $attr, $method ) );
-}
-
-sub compute_delegation {
- my ( $self, $attr_name, $delegation, $params ) = @_;
-
-
- # either it's a concrete list of method names
- return $delegation unless ref $delegation; # single method name
- return @$delegation if reftype($delegation) eq "ARRAY";
-
- # or it's a generative api
- my $delegator_meta = $self->_guess_attr_class_or_role( $attr_name, $params );
- $self->generate_delegation_list( $delegation, $delegator_meta );
-}
-
-sub get_delegatable_methods {
- my ( $self, @names_or_hashes ) = @_;
- map { ref($_) ? $_ : { name => $_ } } @names_or_hashes;
-}
-
-sub generate_delegation_list {
- my ( $self, $delegation, $delegator_meta ) = @_;
-
- if ( reftype($delegation) eq "CODE" ) {
- return $delegation->( $self, $delegator_meta );
- } elsif ( blessed($delegation) eq "Regexp" ) {
- confess "For regular expression support the delegator class/role must use a Class::MOP::Class metaclass"
- unless $delegator_meta->isa( "Class::MOP::Class" );
- return grep { $_->{name} =~ /$delegation/ } $delegator_meta->compute_all_applicable_methods();
- } else {
- confess "The 'handles' specification '$delegation' is not supported";
- }
-}
-
-sub _guess_attr_class_or_role {
- my ( $self, $attr, $params ) = @_;
-
- my ( $isa, $does ) = @{ $params }{qw/isa does/};
-
- confess "Generative delegations must explicitly specify a class or a role for the attribute's type"
- unless $isa || $does;
-
- for (grep { blessed($_) } $isa, $does) {
- confess "You must use classes/roles, not type constraints to use delegation ($_)"
- unless $_->isa( "Moose::Meta::Class" );
- }
-
- confess "Cannot have an isa option and a does option if the isa does not do the does"
- if $isa and $does and $isa->can("does") and !$isa->does( $does );
-
- # if it's a class/role name make it into a meta object
- for ($isa, $does) {
- $_ = $_->meta if defined and !ref and $_->can("meta");
- }
-
- $isa = Class::MOP::Class->initialize($isa) if $isa and !ref($isa);
-
- return $isa || $does;
-}
-
sub add_override_method_modifier {
my ($self, $name, $method, $_super_package) = @_;
# need this for roles ...