X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FClass%2FMOP%2FMethod.pm;h=ba25fae8211d2a4eb8ff7f88bcee1a7f57c5ad53;hb=3bc310dd562250ad2bbce64058877d7d95d931a9;hp=56772f7c72016dc3a9f72135eb434ec1ca432cd3;hpb=552e3d24bc4b3f3f524be6f4bed4720485eb6cf2;p=gitmo%2FClass-MOP.git diff --git a/lib/Class/MOP/Method.pm b/lib/Class/MOP/Method.pm index 56772f7..ba25fae 100644 --- a/lib/Class/MOP/Method.pm +++ b/lib/Class/MOP/Method.pm @@ -4,38 +4,262 @@ package Class::MOP::Method; use strict; use warnings; -our $VERSION = '0.01'; - +use Carp 'confess'; +use Scalar::Util 'weaken'; + +our $VERSION = '0.85'; +$VERSION = eval $VERSION; +our $AUTHORITY = 'cpan:STEVAN'; + +use base 'Class::MOP::Object'; + +# NOTE: +# if poked in the right way, +# they should act like CODE refs. +use overload '&{}' => sub { $_[0]->body }, fallback => 1; + +# construction + +sub wrap { + my ( $class, @args ) = @_; + + unshift @args, 'body' if @args % 2 == 1; + + my %params = @args; + my $code = $params{body}; + + ('CODE' eq ref($code)) + || confess "You must supply a CODE reference to bless, not (" . ($code || 'undef') . ")"; + + ($params{package_name} && $params{name}) + || confess "You must supply the package_name and name parameters"; + + my $self = $class->_new(\%params); + + weaken($self->{associated_metaclass}) if $self->{associated_metaclass}; + + return $self; +} + +sub _new { + my $class = shift; + my $params = @_ == 1 ? $_[0] : {@_}; + + my $self = bless { + 'body' => $params->{body}, + 'associated_metaclass' => $params->{associated_metaclass}, + 'package_name' => $params->{package_name}, + 'name' => $params->{name}, + } => $class; +} + +## accessors + +sub associated_metaclass { shift->{'associated_metaclass'} } + +sub attach_to_class { + my ( $self, $class ) = @_; + $self->{associated_metaclass} = $class; + weaken($self->{associated_metaclass}); +} + +sub detach_from_class { + my $self = shift; + delete $self->{associated_metaclass}; +} + +sub fully_qualified_name { + my $self = shift; + $self->package_name . '::' . $self->name; +} + +sub original_method { (shift)->{'original_method'} } + +sub _set_original_method { $_[0]->{'original_method'} = $_[1] } + +# It's possible that this could cause a loop if there is a circular +# reference in here. That shouldn't ever happen in normal +# circumstances, since original method only gets set when clone is +# called. We _could_ check for such a loop, but it'd involve some sort +# of package-lexical variable, and wouldn't be terribly subclassable. +sub original_package_name { + my $self = shift; + + $self->original_method + ? $self->original_method->original_package_name + : $self->package_name; +} + +sub original_name { + my $self = shift; + + $self->original_method + ? $self->original_method->original_name + : $self->name; +} + +sub original_fully_qualified_name { + my $self = shift; + + $self->original_method + ? $self->original_method->original_fully_qualified_name + : $self->fully_qualified_name; +} + +sub execute { + my $self = shift; + $self->body->(@_); +} + +# NOTE: +# the Class::MOP bootstrap +# will create this for us +# - SL +# sub clone { ... } + 1; __END__ =pod -=head1 NAME +=head1 NAME Class::MOP::Method - Method Meta Object -=head1 SYNOPSIS - =head1 DESCRIPTION -The Method Protocol is very small, since methods in Perl 5 are just -subroutines within the particular package. Basically all we do is to -bless the subroutine and provide some very simple introspection -methods for it. +The Method Protocol is very small, since methods in Perl 5 are just +subroutines in a specific package. We provide a very basic +introspection interface. + +=head1 METHODS + +=over 4 + +=item B<< Class::MOP::Method->wrap($code, %options) >> + +This is the constructor. It accepts a subroutine reference and a hash +of options. + +The options are: + +=over 8 + +=item * name + +The method name (without a package name). This is required. + +=item * package_name -=head1 AUTHOR +The package name for the method. This is required. -Stevan Little Estevan@iinteractive.comE +=item * associated_metaclass + +An optional L object. This is the metaclass for the +method's class. + +=back + +=item B<< $metamethod->clone(%params) >> + +This makes a shallow clone of the method object. In particular, +subroutine reference itself is shared between all clones of a given +method. + +When a method is cloned, the original method object will be available +by calling C on the clone. + +=item B<< $metamethod->body >> + +This returns a reference to the method's subroutine. + +=item B<< $metamethod->name >> + +This returns the method's name + +=item B<< $metamethod->package_name >> + +This returns the method's package name. + +=item B<< $metamethod->fully_qualified_name >> + +This returns the method's fully qualified name (package name and +method name). + +=item B<< $metamethod->associated_metaclass >> + +This returns the L object for the method, if one +exists. + +=item B<< $metamethod->original_method >> + +If this method object was created as a clone of some other method +object, this returns the object that was cloned. + +=item B<< $metamethod->original_name >> + +This returns the method's original name, wherever it was first +defined. + +If this method is a clone of a clone (of a clone, etc.), this method +returns the name from the I method in the chain of clones. + +=item B<< $metamethod->original_package_name >> + +This returns the method's original package name, wherever it was first +defined. + +If this method is a clone of a clone (of a clone, etc.), this method +returns the package name from the I method in the chain of +clones. + +=item B<< $metamethod->original_fully_qualified_name >> + +This returns the method's original fully qualified name, wherever it +was first defined. + +If this method is a clone of a clone (of a clone, etc.), this method +returns the fully qualified name from the I method in the chain +of clones. + +=item B<< $metamethod->attach_to_class($metaclass) >> + +Given a L object, this method sets the associated +metaclass for the method. This will overwrite any existing associated +metaclass. + +=item B<< $metamethod->detach_from_class >> + +Removes any associated metaclass object for the method. + +=item B<< $metamethod->execute(...) >> + +This executes the method. Any arguments provided will be passed on to +the method itself. + +=item B<< Class::MOP::Method->meta >> + +This will return a L instance for this class. + +It should also be noted that L will actually bootstrap +this module by installing a number of attribute meta-objects into its +metaclass. + +=back + +=head1 AUTHORS + +Stevan Little Estevan@iinteractive.comE =head1 COPYRIGHT AND LICENSE -Copyright 2006 by Infinity Interactive, Inc. +Copyright 2006-2009 by Infinity Interactive, Inc. L This library is free software; you can redistribute it and/or modify -it under the same terms as Perl itself. +it under the same terms as Perl itself. + +=cut -=cut \ No newline at end of file