use Scalar::Util 'blessed';
use B 'svref_2object';
-our $VERSION = '0.08';
+our $VERSION = '0.09';
our $AUTHORITY = 'cpan:STEVAN';
use Moose::Meta::Class;
use base 'Class::MOP::Module';
-## Attributes
-## roles
+# NOTE:
+# I normally don't do this, but I am doing
+# a whole bunch of meta-programmin in this
+# module, so it just makes sense.
+# - SL
-__PACKAGE__->meta->add_attribute('roles' => (
- reader => 'get_roles',
- default => sub { [] }
-));
+my $META = __PACKAGE__->meta;
+
+## ------------------------------------------------------------------
+## attributes ...
-## excluded roles
+# NOTE:
+# since roles are lazy, we hold all the attributes
+# of the individual role in 'statis' until which
+# time when it is applied to a class. This means
+# keeping a lot of things in hash maps, so we are
+# using a little of that meta-programmin' magic
+# here an saving lots of extra typin.
+# - SL
-__PACKAGE__->meta->add_attribute('excluded_roles_map' => (
- reader => 'get_excluded_roles_map',
+$META->add_attribute($_->{name} => (
+ reader => $_->{reader},
default => sub { {} }
-));
+)) for (
+ { name => 'excluded_roles_map', reader => 'get_excluded_roles_map' },
+ { name => 'attribute_map', reader => 'get_attribute_map' },
+ { name => 'required_methods', reader => 'get_required_methods_map' },
+);
+
+# NOTE:
+# many of these attributes above require similar
+# functionality to support them, so we again use
+# the wonders of meta-programmin' to deliver a
+# very compact solution to this normally verbose
+# problem.
+# - SL
+
+foreach my $action (
+ {
+ attr_reader => 'get_excluded_roles_map' ,
+ methods => {
+ add => 'add_excluded_roles',
+ get_list => 'get_excluded_roles_list',
+ existence => 'excludes_role',
+ }
+ },
+ {
+ attr_reader => 'get_required_methods_map',
+ methods => {
+ add => 'add_required_methods',
+ remove => 'remove_required_methods',
+ get_list => 'get_required_method_list',
+ existence => 'requires_method',
+ }
+ },
+ {
+ attr_reader => 'get_attribute_map',
+ methods => {
+ get => 'get_attribute',
+ get_list => 'get_attribute_list',
+ existence => 'has_attribute',
+ remove => 'remove_attribute',
+ }
+ }
+) {
+
+ my $attr_reader = $action->{attr_reader};
+ my $methods = $action->{methods};
+
+ $META->add_method($methods->{add} => sub {
+ my ($self, @values) = @_;
+ $self->$attr_reader->{$_} = undef foreach @values;
+ }) if exists $methods->{add};
+
+ $META->add_method($methods->{get_list} => sub {
+ my ($self) = @_;
+ keys %{$self->$attr_reader};
+ }) if exists $methods->{get_list};
+
+ $META->add_method($methods->{get} => sub {
+ my ($self, $name) = @_;
+ $self->$attr_reader->{$name}
+ }) if exists $methods->{get};
+
+ $META->add_method($methods->{existence} => sub {
+ my ($self, $name) = @_;
+ exists $self->$attr_reader->{$name} ? 1 : 0;
+ }) if exists $methods->{existence};
+
+ $META->add_method($methods->{remove} => sub {
+ my ($self, @values) = @_;
+ delete $self->$attr_reader->{$_} foreach @values;
+ }) if exists $methods->{remove};
+}
-## attributes
+## some things don't always fit, so they go here ...
-__PACKAGE__->meta->add_attribute('attribute_map' => (
- reader => 'get_attribute_map',
- default => sub { {} }
-));
+sub add_attribute {
+ my $self = shift;
+ my $name = shift;
+ my $attr_desc;
+ if (scalar @_ == 1 && ref($_[0]) eq 'HASH') {
+ $attr_desc = $_[0];
+ }
+ else {
+ $attr_desc = { @_ };
+ }
+ $self->get_attribute_map->{$name} = $attr_desc;
+}
-## required methods
+sub _clean_up_required_methods {
+ my $self = shift;
+ foreach my $method ($self->get_required_method_list) {
+ $self->remove_required_methods($method)
+ if $self->has_method($method);
+ }
+}
-__PACKAGE__->meta->add_attribute('required_methods' => (
- reader => 'get_required_methods_map',
+## ------------------------------------------------------------------
+## method modifiers
+
+$META->add_attribute($_->{name} => (
+ reader => $_->{reader},
default => sub { {} }
-));
+)) for (
+ { name => 'before_method_modifiers', reader => 'get_before_method_modifiers_map' },
+ { name => 'after_method_modifiers', reader => 'get_after_method_modifiers_map' },
+ { name => 'around_method_modifiers', reader => 'get_around_method_modifiers_map' },
+ { name => 'override_method_modifiers', reader => 'get_override_method_modifiers_map' },
+);
+
+# NOTE:
+# the before/around/after method modifiers are
+# stored by name, but there can be many methods
+# then associated with that name. So again we have
+# lots of similar functionality, so we can do some
+# meta-programmin' and save some time.
+# - SL
+
+foreach my $modifier_type (qw[ before around after ]) {
+
+ my $attr_reader = "get_${modifier_type}_method_modifiers_map";
+
+ $META->add_method("get_${modifier_type}_method_modifiers" => sub {
+ my ($self, $method_name) = @_;
+ @{$self->$attr_reader->{$method_name}};
+ });
+
+ $META->add_method("has_${modifier_type}_method_modifiers" => sub {
+ my ($self, $method_name) = @_;
+ # NOTE:
+ # for now we assume that if it exists,..
+ # it has at least one modifier in it
+ (exists $self->$attr_reader->{$method_name}) ? 1 : 0;
+ });
+
+ $META->add_method("add_${modifier_type}_method_modifier" => sub {
+ my ($self, $method_name, $method) = @_;
+
+ $self->$attr_reader->{$method_name} = []
+ unless exists $self->$attr_reader->{$method_name};
+
+ my $modifiers = $self->$attr_reader->{$method_name};
+
+ # NOTE:
+ # check to see that we aren't adding the
+ # same code twice. We err in favor of the
+ # first on here, this may not be as expected
+ foreach my $modifier (@{$modifiers}) {
+ return if $modifier == $method;
+ }
+
+ push @{$modifiers} => $method;
+ });
+
+}
-## method modifiers
+## ------------------------------------------------------------------
+## override method mofidiers
-__PACKAGE__->meta->add_attribute('before_method_modifiers' => (
- reader => 'get_before_method_modifiers_map',
- default => sub { {} } # (<name> => [ (CODE) ])
-));
+# NOTE:
+# these are a little different because there
+# can only be one per name, whereas the other
+# method modifiers can have multiples.
+# - SL
-__PACKAGE__->meta->add_attribute('after_method_modifiers' => (
- reader => 'get_after_method_modifiers_map',
- default => sub { {} } # (<name> => [ (CODE) ])
-));
+sub add_override_method_modifier {
+ my ($self, $method_name, $method) = @_;
+ (!$self->has_method($method_name))
+ || confess "Cannot add an override of method '$method_name' " .
+ "because there is a local version of '$method_name'";
+ $self->get_override_method_modifiers_map->{$method_name} = $method;
+}
-__PACKAGE__->meta->add_attribute('around_method_modifiers' => (
- reader => 'get_around_method_modifiers_map',
- default => sub { {} } # (<name> => [ (CODE) ])
-));
+sub has_override_method_modifier {
+ my ($self, $method_name) = @_;
+ # NOTE:
+ # for now we assume that if it exists,..
+ # it has at least one modifier in it
+ (exists $self->get_override_method_modifiers_map->{$method_name}) ? 1 : 0;
+}
-__PACKAGE__->meta->add_attribute('override_method_modifiers' => (
- reader => 'get_override_method_modifiers_map',
- default => sub { {} } # (<name> => CODE)
-));
+sub get_override_method_modifier {
+ my ($self, $method_name) = @_;
+ $self->get_override_method_modifiers_map->{$method_name};
+}
-## Methods
+## general list accessor ...
-sub method_metaclass { 'Moose::Meta::Role::Method' }
+sub get_method_modifier_list {
+ my ($self, $modifier_type) = @_;
+ my $accessor = "get_${modifier_type}_method_modifiers_map";
+ keys %{$self->$accessor};
+}
+## ------------------------------------------------------------------
## subroles
+__PACKAGE__->meta->add_attribute('roles' => (
+ reader => 'get_roles',
+ default => sub { [] }
+));
+
sub add_role {
my ($self, $role) = @_;
(blessed($role) && $role->isa('Moose::Meta::Role'))
sub calculate_all_roles {
my $self = shift;
my %seen;
- grep { !$seen{$_->name}++ } $self, map { $_->calculate_all_roles } @{ $self->get_roles };
+ grep {
+ !$seen{$_->name}++
+ } ($self,
+ map {
+ $_->calculate_all_roles
+ } @{ $self->get_roles });
}
sub does_role {
return 0;
}
-## excluded roles
-
-sub add_excluded_roles {
- my ($self, @excluded_role_names) = @_;
- $self->get_excluded_roles_map->{$_} = undef foreach @excluded_role_names;
-}
-
-sub get_excluded_roles_list {
- my ($self) = @_;
- keys %{$self->get_excluded_roles_map};
-}
-
-sub excludes_role {
- my ($self, $role_name) = @_;
- exists $self->get_excluded_roles_map->{$role_name} ? 1 : 0;
-}
-
-## required methods
-
-sub add_required_methods {
- my ($self, @methods) = @_;
- $self->get_required_methods_map->{$_} = undef foreach @methods;
-}
-
-sub remove_required_methods {
- my ($self, @methods) = @_;
- delete $self->get_required_methods_map->{$_} foreach @methods;
-}
-
-sub get_required_method_list {
- my ($self) = @_;
- keys %{$self->get_required_methods_map};
-}
+## ------------------------------------------------------------------
+## methods
-sub requires_method {
- my ($self, $method_name) = @_;
- exists $self->get_required_methods_map->{$method_name} ? 1 : 0;
-}
-
-sub _clean_up_required_methods {
- my $self = shift;
- foreach my $method ($self->get_required_method_list) {
- $self->remove_required_methods($method)
- if $self->has_method($method);
- }
-}
-
-## methods
+sub method_metaclass { 'Moose::Meta::Role::Method' }
# FIXME:
# this is an UGLY hack
sub find_method_by_name { (shift)->get_method(@_) }
-# ... however the items in statis (attributes & method modifiers)
-# can be removed and added to through this API
-
-# attributes
-
-sub add_attribute {
- my $self = shift;
- my $name = shift;
- my $attr_desc;
- if (scalar @_ == 1 && ref($_[0]) eq 'HASH') {
- $attr_desc = $_[0];
- }
- else {
- $attr_desc = { @_ };
- }
- $self->get_attribute_map->{$name} = $attr_desc;
-}
-
-sub has_attribute {
- my ($self, $name) = @_;
- exists $self->get_attribute_map->{$name} ? 1 : 0;
-}
-
-sub get_attribute {
- my ($self, $name) = @_;
- $self->get_attribute_map->{$name}
-}
-
-sub remove_attribute {
- my ($self, $name) = @_;
- delete $self->get_attribute_map->{$name}
-}
+## ------------------------------------------------------------------
+## role construction
+## ------------------------------------------------------------------
-sub get_attribute_list {
- my ($self) = @_;
- keys %{$self->get_attribute_map};
-}
+my $anon_counter = 0;
-# method modifiers
+sub apply {
+ my ($self, $other) = @_;
+
+ unless ($other->isa('Moose::Meta::Class') || $other->isa('Moose::Meta::Role')) {
+
+ # Runtime Role mixins
+
+ # FIXME:
+ # We really should do this better, and
+ # cache the results of our efforts so
+ # that we don't need to repeat them.
+
+ my $pkg_name = __PACKAGE__ . "::__RUNTIME_ROLE_ANON_CLASS__::" . $anon_counter++;
+ eval "package " . $pkg_name . "; our \$VERSION = '0.00';";
+ die $@ if $@;
-# mimic the metaclass API
-sub add_before_method_modifier { (shift)->_add_method_modifier('before', @_) }
-sub add_around_method_modifier { (shift)->_add_method_modifier('around', @_) }
-sub add_after_method_modifier { (shift)->_add_method_modifier('after', @_) }
+ my $object = $other;
-sub _add_method_modifier {
- my ($self, $modifier_type, $method_name, $method) = @_;
- my $accessor = "get_${modifier_type}_method_modifiers_map";
- $self->$accessor->{$method_name} = []
- unless exists $self->$accessor->{$method_name};
- my $modifiers = $self->$accessor->{$method_name};
- # NOTE:
- # check to see that we aren't adding the
- # same code twice. We err in favor of the
- # first on here, this may not be as expected
- foreach my $modifier (@{$modifiers}) {
- return if $modifier == $method;
+ $other = Moose::Meta::Class->initialize($pkg_name);
+ $other->superclasses(blessed($object));
+
+ bless $object => $pkg_name;
}
- push @{$modifiers} => $method;
-}
-
-sub add_override_method_modifier {
- my ($self, $method_name, $method) = @_;
- (!$self->has_method($method_name))
- || confess "Cannot add an override of method '$method_name' " .
- "because there is a local version of '$method_name'";
- $self->get_override_method_modifiers_map->{$method_name} = $method;
-}
-
-sub has_before_method_modifiers { (shift)->_has_method_modifiers('before', @_) }
-sub has_around_method_modifiers { (shift)->_has_method_modifiers('around', @_) }
-sub has_after_method_modifiers { (shift)->_has_method_modifiers('after', @_) }
-
-# override just checks for one,..
-# but we can still re-use stuff
-sub has_override_method_modifier { (shift)->_has_method_modifiers('override', @_) }
+
+ $self->_check_excluded_roles($other);
+ $self->_check_required_methods($other);
-sub _has_method_modifiers {
- my ($self, $modifier_type, $method_name) = @_;
- my $accessor = "get_${modifier_type}_method_modifiers_map";
- # NOTE:
- # for now we assume that if it exists,..
- # it has at least one modifier in it
- (exists $self->$accessor->{$method_name}) ? 1 : 0;
-}
+ $self->_apply_attributes($other);
+ $self->_apply_methods($other);
-sub get_before_method_modifiers { (shift)->_get_method_modifiers('before', @_) }
-sub get_around_method_modifiers { (shift)->_get_method_modifiers('around', @_) }
-sub get_after_method_modifiers { (shift)->_get_method_modifiers('after', @_) }
+ $self->_apply_override_method_modifiers($other);
+ $self->_apply_before_method_modifiers($other);
+ $self->_apply_around_method_modifiers($other);
+ $self->_apply_after_method_modifiers($other);
-sub _get_method_modifiers {
- my ($self, $modifier_type, $method_name) = @_;
- my $accessor = "get_${modifier_type}_method_modifiers_map";
- @{$self->$accessor->{$method_name}};
+ $other->add_role($self);
}
-sub get_override_method_modifier {
- my ($self, $method_name) = @_;
- $self->get_override_method_modifiers_map->{$method_name};
+sub combine {
+ my ($class, @roles) = @_;
+
+ my $pkg_name = __PACKAGE__ . "::__COMPOSITE_ROLE_SANDBOX__::" . $anon_counter++;
+ eval "package " . $pkg_name . "; our \$VERSION = '0.00';";
+ die $@ if $@;
+
+ my $combined = $class->initialize($pkg_name);
+
+ foreach my $role (@roles) {
+ $role->apply($combined);
+ }
+
+ $combined->_clean_up_required_methods;
+
+ return $combined;
}
-sub get_method_modifier_list {
- my ($self, $modifier_type) = @_;
- my $accessor = "get_${modifier_type}_method_modifiers_map";
- keys %{$self->$accessor};
-}
+## ------------------------------------------------------------------
## applying a role to a class ...
sub _apply_around_method_modifiers { (shift)->_apply_method_modifiers('around' => @_) }
sub _apply_after_method_modifiers { (shift)->_apply_method_modifiers('after' => @_) }
-my $anon_counter = 0;
-
-sub apply {
- my ($self, $other) = @_;
-
- unless ($other->isa('Moose::Meta::Class') || $other->isa('Moose::Meta::Role')) {
-
- # Runtime Role mixins
-
- # FIXME:
- # We really should do this better, and
- # cache the results of our efforts so
- # that we don't need to repeat them.
-
- my $pkg_name = __PACKAGE__ . "::__RUNTIME_ROLE_ANON_CLASS__::" . $anon_counter++;
- eval "package " . $pkg_name . "; our \$VERSION = '0.00';";
- die $@ if $@;
-
- my $object = $other;
-
- $other = Moose::Meta::Class->initialize($pkg_name);
- $other->superclasses(blessed($object));
-
- bless $object => $pkg_name;
- }
-
- $self->_check_excluded_roles($other);
- $self->_check_required_methods($other);
-
- $self->_apply_attributes($other);
- $self->_apply_methods($other);
-
- $self->_apply_override_method_modifiers($other);
- $self->_apply_before_method_modifiers($other);
- $self->_apply_around_method_modifiers($other);
- $self->_apply_after_method_modifiers($other);
-
- $other->add_role($self);
-}
-
-sub combine {
- my ($class, @roles) = @_;
-
- my $pkg_name = __PACKAGE__ . "::__COMPOSITE_ROLE_SANDBOX__::" . $anon_counter++;
- eval "package " . $pkg_name . "; our \$VERSION = '0.00';";
- die $@ if $@;
-
- my $combined = $class->initialize($pkg_name);
-
- foreach my $role (@roles) {
- $role->apply($combined);
- }
-
- $combined->_clean_up_required_methods;
-
- return $combined;
-}
-
1;
__END__
projects / gitmo/Moose.git / commitdiff