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package Bread::Board::Declare::Meta::Role::Attribute;
use Moose::Role;
Moose::Util::meta_attribute_alias('Service');
# ABSTRACT: attribute metarole for Bread::Board::Declare
use Bread::Board::Types;
use List::MoreUtils qw(any);
use Bread::Board::Declare::BlockInjection;
use Bread::Board::Declare::ConstructorInjection;
use Bread::Board::Declare::Literal;
=head1 DESCRIPTION
This role adds functionality to the attribute metaclass for
L<Bread::Board::Declare> objects.
=cut
=attr service
Whether or not to create a service for this attribute. Defaults to true.
=cut
has service => (
is => 'ro',
isa => 'Bool',
default => 1,
);
=attr block
The block to use when creating a L<Bread::Board::BlockInjection> service.
=cut
has block => (
is => 'ro',
isa => 'CodeRef',
predicate => 'has_block',
);
=attr literal_value
The value to use when creating a L<Bread::Board::Literal> service. Note that
the parameter that should be passed to C<has> is C<value>.
=cut
# has_value is already a method
has literal_value => (
is => 'ro',
isa => 'Str|CodeRef',
init_arg => 'value',
predicate => 'has_literal_value',
);
=attr lifecycle
The lifecycle to use when creating the service. See L<Bread::Board::Service>
and L<Bread::Board::LifeCycle>.
=cut
has lifecycle => (
is => 'ro',
isa => 'Str',
predicate => 'has_lifecycle',
);
=attr dependencies
The dependency specification to use when creating the service. See
L<Bread::Board::Service::WithDependencies>.
=cut
has dependencies => (
is => 'ro',
isa => 'Bread::Board::Service::Dependencies',
coerce => 1,
predicate => 'has_dependencies',
);
=attr constructor_name
The constructor name to use when creating L<Bread::Board::ConstructorInjection>
services. Defaults to C<new>.
=cut
has constructor_name => (
is => 'ro',
isa => 'Str',
predicate => 'has_constructor_name',
);
=attr associated_service
The service object that is associated with this attribute.
=cut
has associated_service => (
is => 'rw',
does => 'Bread::Board::Service',
predicate => 'has_associated_service',
);
after attach_to_class => sub {
my $self = shift;
return unless $self->service;
my %params = (
associated_attribute => $self,
name => $self->name,
($self->has_lifecycle
? (lifecycle => $self->lifecycle)
: ()),
($self->has_dependencies
? (dependencies => $self->dependencies)
: ()),
($self->has_constructor_name
? (constructor_name => $self->constructor_name)
: ()),
);
my $service;
if ($self->has_block) {
$service = Bread::Board::Declare::BlockInjection->new(
%params,
block => $self->block,
);
}
elsif ($self->has_literal_value) {
$service = Bread::Board::Declare::Literal->new(
%params,
value => $self->literal_value,
);
}
elsif ($self->has_type_constraint) {
my $tc = $self->type_constraint;
if ($tc->isa('Moose::Meta::TypeConstraint::Class')) {
$service = Bread::Board::Declare::ConstructorInjection->new(
%params,
class => $tc->class,
);
}
}
$self->associated_service($service) if $service;
};
after _process_options => sub {
my $class = shift;
my ($name, $opts) = @_;
return unless exists $opts->{default}
|| exists $opts->{builder};
return unless exists $opts->{class}
|| exists $opts->{block}
|| exists $opts->{value};
# XXX: uggggh
return if any { $_ eq 'Moose::Meta::Attribute::Native::Trait::String'
|| $_ eq 'Moose::Meta::Attribute::Native::Trait::Counter' }
@{ $opts->{traits} };
my $exists = exists($opts->{default}) ? 'default' : 'builder';
die "$exists is not valid when Bread::Board service options are set";
};
around get_value => sub {
my $orig = shift;
my $self = shift;
my ($instance) = @_;
return $self->$orig($instance)
if $self->has_value($instance);
my $val = $instance->get_service($self->name)->get;
$self->verify_against_type_constraint($val, instance => $instance)
if $self->has_type_constraint;
if ($self->should_auto_deref) {
if (ref($val) eq 'ARRAY') {
return wantarray ? @$val : $val;
}
elsif (ref($val) eq 'HASH') {
return wantarray ? %$val : $val;
}
else {
die "Can't auto_deref $val.";
}
}
else {
return $val;
}
};
if (Moose->VERSION > 1.9900) {
around _inline_instance_get => sub {
my $orig = shift;
my $self = shift;
my ($instance) = @_;
return 'do {' . "\n"
. 'my $val;' . "\n"
. 'if (' . $self->_inline_instance_has($instance) . ') {' . "\n"
. '$val = ' . $self->$orig($instance) . ';' . "\n"
. '}' . "\n"
. 'else {' . "\n"
. '$val = ' . $instance . '->get_service(\'' . $self->name . '\')->get;' . "\n"
. $self->_inline_check_constraint(
'$val', '$type_constraint', '$type_constraint_obj'
)
. '}' . "\n"
. '$val' . "\n"
. '}';
};
}
else {
around accessor_metaclass => sub {
my $orig = shift;
my $self = shift;
return Moose::Meta::Class->create_anon_class(
superclasses => [ $self->$orig(@_) ],
roles => [ 'Bread::Board::Declare::Meta::Role::Accessor' ],
cache => 1
)->name;
};
}
no Moose::Role;
1;
|
