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package GraphQL::Type::NonNull;
use 5.014;
use strict;
use warnings;
use Moo;
use Types::Standard -all;
use GraphQL::MaybeTypeCheck;
extends qw(GraphQL::Type);
our $VERSION = '0.02';
# A-ha
my @TAKE_ON_ME = qw(
GraphQL::Role::Input
GraphQL::Role::Output
);
=head1 NAME
GraphQL::Type::NonNull - GraphQL type that is a non-null version of another type
=head1 SYNOPSIS
use GraphQL::Type::NonNull;
my $type = GraphQL::Type::NonNull->new(of => $other_type);
=head1 DESCRIPTION
Type that is a wrapper for another type. Means data cannot be a null value.
=head1 ATTRIBUTES
=head2 of
GraphQL type object of which this is a non-null version.
=cut
has of => (
is => 'ro',
isa => InstanceOf['GraphQL::Type'],
required => 1,
handles => [ qw(name) ],
);
=head1 METHODS
=head2 BUILD
L<Moo> method that applies the relevant roles.
=cut
sub BUILD {
my ($self, $args) = @_;
my $of = $self->of;
Role::Tiny->apply_roles_to_object($self, grep $of->DOES($_), @TAKE_ON_ME);
}
=head2 to_string
Part of serialisation.
=cut
has to_string => (is => 'lazy', isa => Str, init_arg => undef, builder => sub {
my ($self) = @_;
$self->of->to_string . '!';
});
=head2 is_valid
True if given Perl value is a valid value for this type.
=cut
method is_valid(Any $item) :ReturnType(Bool) {
return if !defined $item or !$self->of->is_valid($item);
1;
}
method graphql_to_perl(Any $item) :ReturnType(Any) {
my $of = $self->of;
$of->graphql_to_perl($item) // die $self->to_string . " given null value.\n";
}
=head2 name
The C<name> of the type this object is a non-null version of.
=cut
__PACKAGE__->meta->make_immutable();
1;
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