use Moose;
use Moose::Util::TypeConstraints;
-our $VERSION = '0.01';
+our $VERSION = '0.16';
+$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
extends 'Moose::Meta::Attribute';
-has 'method_constructors' => (
+# this is the method map you define ...
+has 'provides' => (
is => 'ro',
isa => 'HashRef',
- default => sub { {} }
+ default => sub {{}}
);
-has 'provides' => (
- is => 'ro',
- isa => 'HashRef',
- required => 1,
+has 'curries' => (
+ is => 'ro',
+ isa => 'HashRef',
+ default => sub {{}}
);
-# extend the parents stuff to make sure
+# these next two are the possible methods
+# you can use in the 'provides' map.
+
+# provide a Class or Role which we can
+# collect the method providers from
+has 'method_provider' => (
+ is => 'ro',
+ isa => 'ClassName',
+ predicate => 'has_method_provider',
+);
+
+# or you can provide a HASH ref of anon subs
+# yourself. This will also collect and store
+# the methods from a method_provider as well
+has 'method_constructors' => (
+ is => 'ro',
+ isa => 'HashRef',
+ lazy => 1,
+ default => sub {
+ my $self = shift;
+ return +{} unless $self->has_method_provider;
+ # or grab them from the role/class
+ my $method_provider = $self->method_provider->meta;
+ return +{
+ map {
+ $_ => $method_provider->get_method($_)
+ } $method_provider->get_method_list
+ };
+ },
+);
+
+# extend the parents stuff to make sure
# certain bits are now required ...
-has '+$!default' => (required => 1);
+has '+default' => (required => 1);
has '+type_constraint' => (required => 1);
## Methods called prior to instantiation
sub process_options_for_provides {
my ($self, $options) = @_;
+
if (my $type = $self->helper_type) {
(exists $options->{isa})
- || confess "You must define a type with the $type metaclass";
+ || confess "You must define a type with the $type metaclass";
- my $isa = $options->{isa};
+ my $isa = $options->{isa};
unless (blessed($isa) && $isa->isa('Moose::Meta::TypeConstraint')) {
- $isa = find_type_constraint($isa);
+ $isa = Moose::Util::TypeConstraints::find_or_create_type_constraint($isa);
}
($isa->is_a_type_of($type))
|| confess "The type constraint for a $type ($options->{isa}) must be a subtype of $type";
}
-
- # this can be augmented by subclasses ..
- inner();
}
before '_process_options' => sub {
my ($self, $name, $options) = @_;
- if (exists $options->{provides}) {
- $self->process_options_for_provides($options);
- }
+ $self->process_options_for_provides($options, $name);
};
## methods called after instantiation
-# this confirms that provides has
+# this confirms that provides (and curries) has
# all valid possibilities in it
sub check_provides_values {
my $self = shift;
+
my $method_constructors = $self->method_constructors;
+
foreach my $key (keys %{$self->provides}) {
(exists $method_constructors->{$key})
|| confess "$key is an unsupported method type";
}
+
+ foreach my $key (keys %{$self->curries}) {
+ (exists $method_constructors->{$key})
+ || confess "$key is an unsupported method type";
+ }
+}
+
+sub _curry {
+ my $self = shift;
+ my $code = shift;
+
+ my @args = @_;
+ return sub {
+ my $self = shift;
+ $code->($self, @args, @_)
+ };
+}
+
+sub _curry_sub {
+ my $self = shift;
+ my $body = shift;
+ my $code = shift;
+
+ return sub {
+ my $self = shift;
+ $code->($self, $body, @_)
+ };
}
after 'install_accessors' => sub {
my $attr = shift;
my $class = $attr->associated_class;
+ # grab the reader and writer methods
+ # as well, this will be useful for
+ # our method provider constructors
+ my $attr_reader = $attr->get_read_method_ref;
+ my $attr_writer = $attr->get_write_method_ref;
+
+
# before we install them, lets
# make sure they are valid
- $attr->check_provides_values;
+ $attr->check_provides_values;
my $method_constructors = $attr->method_constructors;
-
+
+ my $class_name = $class->name;
+
+ while (my ($constructor, $constructed) = each %{$attr->curries}) {
+ my $method_code;
+ while (my ($curried_name, $curried_arg) = each(%$constructed)) {
+ if ($class->has_method($curried_name)) {
+ confess
+ "The method ($curried_name) already ".
+ "exists in class (" . $class->name . ")";
+ }
+ my $body = $method_constructors->{$constructor}->(
+ $attr,
+ $attr_reader,
+ $attr_writer,
+ );
+
+ if (ref $curried_arg eq 'ARRAY') {
+ $method_code = $attr->_curry($body, @$curried_arg);
+ }
+ elsif (ref $curried_arg eq 'CODE') {
+ $method_code = $attr->_curry_sub($body, $curried_arg);
+ }
+ else {
+ confess "curries parameter must be ref type HASH or CODE";
+ }
+
+ my $method = MooseX::AttributeHelpers::Meta::Method::Curried->wrap(
+ $method_code,
+ package_name => $class_name,
+ name => $curried_name,
+ );
+
+ $attr->associate_method($method);
+ $class->add_method($curried_name => $method);
+ }
+ }
+
foreach my $key (keys %{$attr->provides}) {
- $class->add_method(
- $attr->provides->{$key},
- $method_constructors->{$key}->($attr)
+
+ my $method_name = $attr->provides->{$key};
+
+ if ($class->has_method($method_name)) {
+ confess "The method ($method_name) already exists in class (" . $class->name . ")";
+ }
+
+ my $method = MooseX::AttributeHelpers::Meta::Method::Provided->wrap(
+ $method_constructors->{$key}->(
+ $attr,
+ $attr_reader,
+ $attr_writer,
+ ),
+ package_name => $class_name,
+ name => $method_name,
);
+
+ $attr->associate_method($method);
+ $class->add_method($method_name => $method);
+ }
+};
+
+after 'remove_accessors' => sub {
+ my $attr = shift;
+ my $class = $attr->associated_class;
+
+ # provides accessors
+ foreach my $key (keys %{$attr->provides}) {
+ my $method_name = $attr->provides->{$key};
+ my $method = $class->get_method($method_name);
+ $class->remove_method($method_name)
+ if blessed($method) &&
+ $method->isa('MooseX::AttributeHelpers::Meta::Method::Provided');
+ }
+
+ # curries accessors
+ foreach my $key (keys %{$attr->curries}) {
+ my $method_name = $attr->curries->{$key};
+ my $method = $class->get_method($method_name);
+ $class->remove_method($method_name)
+ if blessed($method) &&
+ $method->isa('MooseX::AttributeHelpers::Meta::Method::Provided');
}
};
=head1 NAME
-MooseX::AttributeHelpers::Base
+MooseX::AttributeHelpers::Base - Base class for attribute helpers
-=head1 SYNOPSIS
-
=head1 DESCRIPTION
+Documentation to come.
+
+=head1 ATTRIBUTES
+
+=over 4
+
+=item B<provides>
+
+=item B<curries>
+
+=item B<method_provider>
+
+=item B<method_constructors>
+
+=back
+
+=head1 EXTENDED ATTRIBUTES
+
+=over 4
+
+=item B<default>
+
+C<default> is now required.
+
+=item B<type_constraint>
+
+C<type_constraint> is now required.
+
+=back
+
=head1 METHODS
+=over 4
+
+=item B<meta>
+
+=item B<helper_type>
+
+=item B<check_provides_values>
+
+=item B<has_default>
+
+=item B<has_method_provider>
+
+=item B<has_type_constraint>
+
+=item B<install_accessors>
+
+=item B<remove_accessors>
+
+=item B<process_options_for_provides>
+
+=back
+
=head1 BUGS
-All complex software has bugs lurking in it, and this module is no
+All complex software has bugs lurking in it, and this module is no
exception. If you find a bug please either email me, or add the bug
to cpan-RT.
=head1 COPYRIGHT AND LICENSE
-Copyright 2007 by Infinity Interactive, Inc.
+Copyright 2007-2008 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>
projects / gitmo/MooseX-AttributeHelpers.git / blobdiff