X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FClass%2FMOP%2FPackage.pm;h=4a70e892c51312464f3331a282b0f95ccc9fb746;hb=1550e0820d345fd483382e2b912ba683da3bdc1d;hp=1ba7caf53ef0961472122089096f1463184a0785;hpb=6e1c8b63d87c6e1d8e84e15cc2c1f5336780515b;p=gitmo%2FClass-MOP.git diff --git a/lib/Class/MOP/Package.pm b/lib/Class/MOP/Package.pm index 1ba7caf..4a70e89 100644 --- a/lib/Class/MOP/Package.pm +++ b/lib/Class/MOP/Package.pm @@ -4,10 +4,12 @@ package Class::MOP::Package; use strict; use warnings; +use B; use Scalar::Util 'blessed'; use Carp 'confess'; -our $VERSION = '0.63'; +our $VERSION = '0.78_02'; +$VERSION = eval $VERSION; our $AUTHORITY = 'cpan:STEVAN'; use base 'Class::MOP::Object'; @@ -15,22 +17,60 @@ use base 'Class::MOP::Object'; # creation ... sub initialize { - my $class = shift; - my $package_name = shift; + my ( $class, @args ) = @_; + + unshift @args, "package" if @args % 2; + + my %options = @args; + my $package_name = $options{package}; + + # we hand-construct the class # until we can bootstrap it - no strict 'refs'; - return bless { - '$!package' => $package_name, - # NOTE: - # because of issues with the Perl API - # to the typeglob in some versions, we - # need to just always grab a new - # reference to the hash in the accessor. - # Ideally we could just store a ref and - # it would Just Work, but oh well :\ - '%!namespace' => \undef, - } => $class; + if ( my $meta = Class::MOP::get_metaclass_by_name($package_name) ) { + return $meta; + } else { + my $meta = ( ref $class || $class )->_new({ + 'package' => $package_name, + %options, + }); + + Class::MOP::store_metaclass_by_name($package_name, $meta); + + return $meta; + } +} + +sub reinitialize { + my ( $class, @args ) = @_; + + unshift @args, "package" if @args % 2; + + my %options = @args; + my $package_name = delete $options{package}; + + (defined $package_name && $package_name && !blessed($package_name)) + || confess "You must pass a package name and it cannot be blessed"; + + Class::MOP::remove_metaclass_by_name($package_name); + + $class->initialize($package_name, %options); # call with first arg form for compat +} + +sub _new { + my $class = shift; + my $options = @_ == 1 ? $_[0] : {@_}; + + # NOTE: + # because of issues with the Perl API + # to the typeglob in some versions, we + # need to just always grab a new + # reference to the hash in the accessor. + # Ideally we could just store a ref and + # it would Just Work, but oh well :\ + $options->{namespace} ||= \undef; + + bless $options, $class; } # Attributes @@ -39,7 +79,6 @@ sub initialize { # all these attribute readers will be bootstrapped # away in the Class::MOP bootstrap section -sub name { $_[0]->{'$!package'} } sub namespace { # NOTE: # because of issues with the Perl API @@ -49,7 +88,7 @@ sub namespace { # we could just store a ref and it would # Just Work, but oh well :\ no strict 'refs'; - \%{$_[0]->{'$!package'} . '::'} + \%{$_[0]->{'package'} . '::'} } # utility methods @@ -91,7 +130,7 @@ sub add_package_symbol { ? @{$variable}{qw[name sigil type]} : $self->_deconstruct_variable_name($variable); - my $pkg = $self->{'$!package'}; + my $pkg = $self->{'package'}; no strict 'refs'; no warnings 'redefine', 'misc'; @@ -127,14 +166,14 @@ sub has_package_symbol { # then this is broken. if (ref($namespace->{$name}) eq 'SCALAR') { - return ($type eq 'CODE' ? 1 : 0); + return ($type eq 'CODE'); } elsif ($type eq 'SCALAR') { my $val = *{$namespace->{$name}}{$type}; - return defined(${$val}) ? 1 : 0; + return defined(${$val}); } else { - defined(*{$namespace->{$name}}{$type}) ? 1 : 0; + defined(*{$namespace->{$name}}{$type}); } } @@ -224,33 +263,16 @@ sub list_all_package_symbols { # NOTE: # or we can filter based on # type (SCALAR|ARRAY|HASH|CODE) - return grep { + if ( $type_filter eq 'CODE' ) { + return grep { (ref($namespace->{$_}) - ? (ref($namespace->{$_}) eq 'SCALAR' && $type_filter eq 'CODE') - : (ref(\$namespace->{$_}) eq 'GLOB' - && defined(*{$namespace->{$_}}{$type_filter}))); - } keys %{$namespace}; -} - -sub get_all_package_symbols { - my ($self, $type_filter) = @_; - my $namespace = $self->namespace; - return %{$namespace} unless defined $type_filter; - - # NOTE: - # or we can filter based on - # type (SCALAR|ARRAY|HASH|CODE) - no strict 'refs'; - return map { - $_ => (ref($namespace->{$_}) eq 'SCALAR' - ? ($type_filter eq 'CODE' ? \&{$self->name . '::' . $_} : undef) - : *{$namespace->{$_}}{$type_filter}) - } grep { - (ref($namespace->{$_}) - ? (ref($namespace->{$_}) eq 'SCALAR' && $type_filter eq 'CODE') - : (ref(\$namespace->{$_}) eq 'GLOB' - && defined(*{$namespace->{$_}}{$type_filter}))); - } keys %{$namespace}; + ? (ref($namespace->{$_}) eq 'SCALAR') + : (ref(\$namespace->{$_}) eq 'GLOB' + && defined(*{$namespace->{$_}}{CODE}))); + } keys %{$namespace}; + } else { + return grep { *{$namespace->{$_}}{$type_filter} } keys %{$namespace}; + } } 1; @@ -265,73 +287,84 @@ Class::MOP::Package - Package Meta Object =head1 DESCRIPTION -This is an abstraction of a Perl 5 package, it is a superclass of -L and provides all of the symbol table -introspection methods. +The Package Protocol provides an abstraction of a Perl 5 package. A +package is basically namespace, and this module provides methods for +looking at and changing that namespace's symbol table. =head1 METHODS =over 4 -=item B +=item B<< Class::MOP::Package->initialize($package_name) >> + +This method creates a new C instance which +represents specified package. If an existing metaclass object exists +for the package, that will be returned instead. + +=item B<< Class::MOP::Package->reinitialize($package_name) >> + +This method forcibly removes any existing metaclass for the package +before calling C + +Do not call this unless you know what you are doing. -Returns a metaclass for this package. +=item B<< $metapackage->name >> -=item B +This is returns the package's name, as passed to the constructor. -This will initialize a Class::MOP::Package instance which represents -the package of C<$package_name>. +=item B<< $metapackage->namespace >> -=item B +This returns a hash reference to the package's symbol table. The keys +are symbol names and the values are typeglob references. -This is a read-only attribute which returns the package name for the -given instance. +=item B<< $metapackage->add_package_symbol($variable_name, $initial_value) >> -=item B +This method accepts a variable name and an optional initial value. The +C<$variable_name> must contain a leading sigil. -This returns a HASH reference to the symbol table. The keys of the -HASH are the symbol names, and the values are typeglob references. +This method creates the variable in the package's symbol table, and +sets it to the initial value if one was provided. -=item B +=item B<< $metapackage->get_package_symbol($variable_name) >> -Given a C<$variable_name>, which must contain a leading sigil, this -method will create that variable within the package which houses the -class. It also takes an optional C<$initial_value>, which must be a -reference of the same type as the sigil of the C<$variable_name> -implies. +Given a variable name, this method returns the variable as a reference +or undef if it does not exist. The C<$variable_name> must contain a +leading sigil. -=item B +=item B<< $metapackage->has_package_symbol($variable_name) >> -This will return a reference to the package variable in -C<$variable_name>. +Returns true if there is a package variable defined for +C<$variable_name>. The C<$variable_name> must contain a leading sigil. -=item B +=item B<< $metapackage->remove_package_symbol($variable_name) >> -Returns true (C<1>) if there is a package variable defined for -C<$variable_name>, and false (C<0>) otherwise. +This will remove the package variable specified C<$variable_name>. The +C<$variable_name> must contain a leading sigil. -=item B +=item B<< $metapackage->remove_package_glob($glob_name) >> -This will attempt to remove the package variable at C<$variable_name>. +Given the name of a glob, this will remove that glob from the +package's symbol table. Glob names do not include a sigil. Removing +the glob removes all variables and subroutines with the specified +name. -=item B +=item B<< $metapackage->list_all_package_symbols($type_filter) >> -This will attempt to remove the entire typeglob associated with -C<$glob_name> from the package. +This will list all the glob names associated with the current +package. These names do not have leading sigils. -=item B +You can provide an optional type filter, which should be one of +'SCALAR', 'ARRAY', 'HASH', or 'CODE'. -This will list all the glob names associated with the current package. -By inspecting the globs returned you can discern all the variables in -the package. +=item B<< $metapackage->get_all_package_symbols($type_filter) >> -By passing a C<$type_filter>, you can limit the list to only those -which match the filter (either SCALAR, ARRAY, HASH or CODE). +This works much like C, but it returns a +hash reference. The keys are glob names and the values are references +to the value for that name. -=item B +=item B<< Class::MOP::Package->meta >> -Works exactly like C but returns a HASH of -name => thing mapping instead of just an ARRAY of names. +This will return a L instance for this class. =back @@ -341,7 +374,7 @@ Stevan Little Estevan@iinteractive.comE =head1 COPYRIGHT AND LICENSE -Copyright 2006-2008 by Infinity Interactive, Inc. +Copyright 2006-2009 by Infinity Interactive, Inc. L