package Moose::Meta::Attribute::Native::Trait;
BEGIN {
$Moose::Meta::Attribute::Native::Trait::AUTHORITY = 'cpan:STEVAN';
}
{
$Moose::Meta::Attribute::Native::Trait::VERSION = '2.0602';
}
use Moose::Role;
use Class::Load qw(load_class);
use List::MoreUtils qw( any uniq );
use Moose::Util::TypeConstraints;
use Moose::Deprecated;
requires '_helper_type';
has _used_default_is => (
is => 'rw',
isa => 'Bool',
default => 0,
);
before '_process_options' => sub {
my ( $self, $name, $options ) = @_;
$self->_check_helper_type( $options, $name );
if ( !( any { exists $options->{$_} } qw( is reader writer accessor ) )
&& $self->can('_default_is') ) {
$options->{is} = $self->_default_is;
$options->{_used_default_is} = 1;
}
if (
!(
$options->{required}
|| any { exists $options->{$_} } qw( default builder lazy_build )
)
&& $self->can('_default_default')
) {
$options->{default} = $self->_default_default;
Moose::Deprecated::deprecated(
feature => 'default default for Native Trait',
message =>
'Allowing a native trait to automatically supply a default is deprecated.'
. ' You can avoid this warning by supplying a default, builder, or making the attribute required'
);
}
};
after 'install_accessors' => sub {
my $self = shift;
return unless $self->_used_default_is;
my @methods
= $self->_default_is eq 'rw'
? qw( reader writer accessor )
: 'reader';
my $name = $self->name;
my $class = $self->associated_class->name;
for my $meth ( uniq grep {defined} map { $self->$_ } @methods ) {
my $message
= "The $meth method in the $class class was automatically created"
. " by the native delegation trait for the $name attribute."
. q{ This "default is" feature is deprecated.}
. q{ Explicitly set "is" or define accessor names to avoid this};
$self->associated_class->add_before_method_modifier(
$meth => sub {
Moose::Deprecated::deprecated(
feature => 'default is for Native Trait',
message =>$message,
);
}
);
}
};
sub _check_helper_type {
my ( $self, $options, $name ) = @_;
my $type = $self->_helper_type;
$options->{isa} = $type
unless exists $options->{isa};
my $isa = Moose::Util::TypeConstraints::find_or_create_type_constraint(
$options->{isa} );
( $isa->is_a_type_of($type) )
|| confess
"The type constraint for $name must be a subtype of $type but it's a $isa";
}
before 'install_accessors' => sub { (shift)->_check_handles_values };
sub _check_handles_values {
my $self = shift;
my %handles = $self->_canonicalize_handles;
for my $original_method ( values %handles ) {
my $name = $original_method->[0];
my $accessor_class = $self->_native_accessor_class_for($name);
( $accessor_class && $accessor_class->can('new') )
|| confess
"$name is an unsupported method type - $accessor_class";
}
}
around '_canonicalize_handles' => sub {
shift;
my $self = shift;
my $handles = $self->handles;
return unless $handles;
unless ( 'HASH' eq ref $handles ) {
$self->throw_error(
"The 'handles' option must be a HASH reference, not $handles");
}
return
map { $_ => $self->_canonicalize_handles_value( $handles->{$_} ) }
keys %$handles;
};
sub _canonicalize_handles_value {
my $self = shift;
my $value = shift;
if ( ref $value && 'ARRAY' ne ref $value ) {
$self->throw_error(
"All values passed to handles must be strings or ARRAY references, not $value"
);
}
return ref $value ? $value : [$value];
}
around '_make_delegation_method' => sub {
my $next = shift;
my ( $self, $handle_name, $method_to_call ) = @_;
my ( $name, @curried_args ) = @$method_to_call;
my $accessor_class = $self->_native_accessor_class_for($name);
die "Cannot find an accessor class for $name"
unless $accessor_class && $accessor_class->can('new');
return $accessor_class->new(
name => $handle_name,
package_name => $self->associated_class->name,
delegate_to_method => $name,
attribute => $self,
is_inline => 1,
curried_arguments => \@curried_args,
root_types => [ $self->_root_types ],
);
};
sub _root_types {
return $_[0]->_helper_type;
}
sub _native_accessor_class_for {
my ( $self, $suffix ) = @_;
my $role
= 'Moose::Meta::Method::Accessor::Native::'
. $self->_native_type . '::'
. $suffix;
load_class($role);
return Moose::Meta::Class->create_anon_class(
superclasses =>
[ $self->accessor_metaclass, $self->delegation_metaclass ],
roles => [$role],
cache => 1,
)->name;
}
sub _build_native_type {
my $self = shift;
for my $role_name ( map { $_->name } $self->meta->calculate_all_roles ) {
return $1 if $role_name =~ /::Native::Trait::(\w+)$/;
}
die "Cannot calculate native type for " . ref $self;
}
has '_native_type' => (
is => 'ro',
isa => 'Str',
lazy => 1,
builder => '_build_native_type',
);
no Moose::Role;
no Moose::Util::TypeConstraints;
1;
# ABSTRACT: Shared role for native delegation traits
=pod
=head1 NAME
Moose::Meta::Attribute::Native::Trait - Shared role for native delegation traits
=head1 VERSION
version 2.0602
=head1 BUGS
See L<Moose/BUGS> for details on reporting bugs.
=head1 SEE ALSO
Documentation for Moose native traits can be found in
L<Moose::Meta::Attribute::Native>.
=head1 AUTHOR
Moose is maintained by the Moose Cabal, along with the help of many contributors. See L<Moose/CABAL> and L<Moose/CONTRIBUTORS> for details.
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2012 by Infinity Interactive, Inc..
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
__END__