X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMoose%2FUtil.pm;h=f7875783753b15fd31241ab995691f991f82f435;hb=aead17e74252e3884f9f8e39912ca98fdf4b4dd5;hp=e9d2f25a15f28bc8230fdf3803a0c1ea18d16361;hpb=6532ca5a12ab6a7df41bdd5238878a47d4514249;p=gitmo%2FMoose.git diff --git a/lib/Moose/Util.pm b/lib/Moose/Util.pm index e9d2f25..f787578 100644 --- a/lib/Moose/Util.pm +++ b/lib/Moose/Util.pm @@ -4,28 +4,35 @@ use strict; use warnings; use Sub::Exporter; -use Scalar::Util (); -use Class::MOP (); +use Scalar::Util 'blessed'; +use Class::MOP 0.60; -our $VERSION = '0.01'; +our $VERSION = '0.62'; +$VERSION = eval $VERSION; our $AUTHORITY = 'cpan:STEVAN'; my @exports = qw[ find_meta does_role search_class_by_role + apply_all_roles + get_all_init_args + get_all_attribute_values + resolve_metatrait_alias + resolve_metaclass_alias + add_method_modifier ]; Sub::Exporter::setup_exporter({ exports => \@exports, - groups => { default => \@exports } + groups => { all => \@exports } }); ## some utils for the utils ... sub find_meta { return unless $_[0]; - return Class::MOP::get_metaclass_by_name(ref($_[0]) || $_[0]); + return Class::MOP::get_metaclass_by_name(blessed($_[0]) || $_[0]); } ## the functions ... @@ -36,7 +43,7 @@ sub does_role { my $meta = find_meta($class_or_obj); return unless defined $meta; - + return unless $meta->can('does_role'); return 1 if $meta->does_role($role); return; } @@ -62,6 +69,107 @@ sub search_class_by_role { return; } +sub apply_all_roles { + my $applicant = shift; + + Moose->throw_error("Must specify at least one role to apply to $applicant") unless @_; + + my $roles = Data::OptList::mkopt( [@_] ); + + my $meta = ( blessed $applicant ? $applicant : find_meta($applicant) ); + + foreach my $role_spec (@$roles) { + Class::MOP::load_class( $role_spec->[0] ); + } + + ( $_->[0]->can('meta') && $_->[0]->meta->isa('Moose::Meta::Role') ) + || Moose->throw_error("You can only consume roles, " + . $_->[0] + . " is not a Moose role") + foreach @$roles; + + if ( scalar @$roles == 1 ) { + my ( $role, $params ) = @{ $roles->[0] }; + $role->meta->apply( $meta, ( defined $params ? %$params : () ) ); + } + else { + Moose::Meta::Role->combine( @$roles )->apply($meta); + } +} + +# instance deconstruction ... + +sub get_all_attribute_values { + my ($class, $instance) = @_; + return +{ + map { $_->name => $_->get_value($instance) } + grep { $_->has_value($instance) } + $class->compute_all_applicable_attributes + }; +} + +sub get_all_init_args { + my ($class, $instance) = @_; + return +{ + map { $_->init_arg => $_->get_value($instance) } + grep { $_->has_value($instance) } + grep { defined($_->init_arg) } + $class->compute_all_applicable_attributes + }; +} + +sub resolve_metatrait_alias { + return resolve_metaclass_alias( @_, trait => 1 ); +} + +{ + my %cache; + + sub resolve_metaclass_alias { + my ( $type, $metaclass_name, %options ) = @_; + + my $cache_key = $type . q{ } . ( $options{trait} ? '-Trait' : '' ); + return $cache{$cache_key}{$metaclass_name} + if $cache{$cache_key}{$metaclass_name}; + + my $possible_full_name + = 'Moose::Meta::' + . $type + . '::Custom::' + . ( $options{trait} ? "Trait::" : "" ) + . $metaclass_name; + + my $loaded_class = Class::MOP::load_first_existing_class( + $possible_full_name, + $metaclass_name + ); + + return $cache{$cache_key}{$metaclass_name} + = $loaded_class->can('register_implementation') + ? $loaded_class->register_implementation + : $loaded_class; + } +} + +sub add_method_modifier { + my ( $class_or_obj, $modifier_name, $args ) = @_; + my $meta = find_meta($class_or_obj); + my $code = pop @{$args}; + my $add_modifier_method = 'add_' . $modifier_name . '_method_modifier'; + if ( my $method_modifier_type = ref( @{$args}[0] ) ) { + if ( $method_modifier_type eq 'Regexp' ) { + my @all_methods = $meta->get_all_methods; + my @matched_methods + = grep { $_->name =~ @{$args}[0] } @all_methods; + $meta->$add_modifier_method( $_->name, $code ) + for @matched_methods; + } + } + else { + $meta->$add_modifier_method( $_, $code ) for @{$args}; + } +} + 1; __END__ @@ -87,11 +195,14 @@ Moose::Util - Utilities for working with Moose classes =head1 DESCRIPTION -This is a set of utility functions to help working with Moose classes. This -is an experimental module, and it's not 100% clear what purpose it will serve. -That said, ideas, suggestions and contributions to this collection are most -welcome. See the L section below for a list of ideas for possible -functions to write. +This is a set of utility functions to help working with Moose classes, and +is used internally by Moose itself. The goal is to provide useful functions +that for both Moose users and Moose extenders (MooseX:: authors). + +This is a relatively new addition to the Moose toolchest, so ideas, +suggestions and contributions to this collection are most welcome. +See the L section below for a list of ideas for possible functions +to write. =head1 EXPORTED FUNCTIONS @@ -110,6 +221,39 @@ Returns true if C<$class_or_obj> can do the role C<$role_name>. Returns first class in precedence list that consumed C<$role_name>. +=item B + +Given an C<$applicant> (which can somehow be turned into either a +metaclass or a metarole) and a list of C<@roles> this will do the +right thing to apply the C<@roles> to the C<$applicant>. This is +actually used internally by both L and L, and the +C<@roles> will be pre-processed through L +to allow for the additional arguments to be passed. + +=item B + +Returns the values of the C<$instance>'s fields keyed by the attribute names. + +=item B + +Returns a hash reference where the keys are all the attributes' Cs +and the values are the instance's fields. Attributes without an C +will be skipped. + +=item B + +=item B + +Resolve a short name like in e.g. + + has foo => ( + metaclass => "Bar", + ); + +to a full class name. + +=item B + =back =head1 TODO @@ -142,7 +286,7 @@ Stevan Little =head1 COPYRIGHT AND LICENSE -Copyright 2007 by Infinity Interactive, Inc. +Copyright 2007-2008 by Infinity Interactive, Inc. L