X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMouse%2FMeta%2FClass.pm;h=966c27db6e2152a9c6dc9a2e4b4b713e7408654f;hb=bcd39bf45ef69561e5ee81b50f4d5760cf19b554;hp=0d7016689f4a431c5ad0a5f748a68a444229cb34;hpb=6cbacbf68a2e6c28c8a41ae5322e614485b22aeb;p=gitmo%2FMouse.git

diff --git a/lib/Mouse/Meta/Class.pm b/lib/Mouse/Meta/Class.pm
index 0d70166..966c27d 100644
--- a/lib/Mouse/Meta/Class.pm
+++ b/lib/Mouse/Meta/Class.pm
@@ -3,9 +3,10 @@ package Mouse::Meta::Class;
 use strict;
 use warnings;
 
-use Scalar::Util 'blessed';
-
-use MRO::Compat;
+use Mouse::Meta::Method::Constructor;
+use Mouse::Meta::Method::Destructor;
+use Mouse::Util qw/get_linear_isa blessed/;
+use Carp 'confess';
 
 do {
     my %METACLASS_CACHE;
@@ -36,6 +37,7 @@ sub new {
         no strict 'refs';
         \@{ $args{name} . '::ISA' };
     };
+    $args{roles} ||= [];
 
     bless \%args, $class;
 }
@@ -53,6 +55,31 @@ sub superclasses {
     @{ $self->{superclasses} };
 }
 
+sub add_method {
+    my $self = shift;
+    my $name = shift;
+    my $code = shift;
+
+    my $pkg = $self->name;
+
+    no strict 'refs';
+    *{ $pkg . '::' . $name } = $code;
+}
+
+# copied from Class::Inspector
+sub get_method_list {
+    my $self = shift;
+    my $name = $self->name;
+
+    no strict 'refs';
+    # Get all the CODE symbol table entries
+    my @functions = grep !/^meta$/,
+      grep { /\A[^\W\d]\w*\z/o }
+      grep { defined &{"${name}::$_"} }
+      keys %{"${name}::"};
+    wantarray ? @functions : \@functions;
+}
+
 sub add_attribute {
     my $self = shift;
     my $attr = shift;
@@ -81,7 +108,180 @@ sub get_attribute_map { $_[0]->{attributes} }
 sub has_attribute     { exists $_[0]->{attributes}->{$_[1]} }
 sub get_attribute     { $_[0]->{attributes}->{$_[1]} }
 
-sub linearized_isa { @{ mro::get_linear_isa($_[0]->name) } }
+sub linearized_isa { @{ get_linear_isa($_[0]->name) } }
+
+sub clone_object {
+    my $class    = shift;
+    my $instance = shift;
+
+    (blessed($instance) && $instance->isa($class->name))
+        || confess "You must pass an instance of the metaclass (" . $class->name . "), not ($instance)";
+
+    $class->clone_instance($instance, @_);
+}
+
+sub clone_instance {
+    my ($class, $instance, %params) = @_;
+
+    (blessed($instance))
+        || confess "You can only clone instances, ($instance) is not a blessed instance";
+
+    my $clone = bless { %$instance }, ref $instance;
+
+    foreach my $attr ($class->compute_all_applicable_attributes()) {
+        if ( defined( my $init_arg = $attr->init_arg ) ) {
+            if (exists $params{$init_arg}) {
+                $clone->{ $attr->name } = $params{$init_arg};
+            }
+        }
+    }
+
+    return $clone;
+
+}
+
+sub make_immutable {
+    my $self = shift;
+    my $name = $self->name;
+    $self->{is_immutable}++;
+    no strict 'refs';
+    *{"$name\::new"}     = Mouse::Meta::Method::Constructor->generate_constructor_method_inline( $self );
+    *{"$name\::DESTROY"} = Mouse::Meta::Method::Destructor->generate_destructor_method_inline( $self );
+}
+sub make_mutable {
+    Carp::croak "Mouse::Meta::Class->make_mutable does not supported by Mouse";
+}
+sub is_immutable { $_[0]->{is_immutable} }
+
+sub attribute_metaclass { "Mouse::Meta::Class" }
+
+sub add_before_method_modifier {
+    my ($self, $name, $code) = @_;
+    require Class::Method::Modifiers;
+    Class::Method::Modifiers::_install_modifier(
+        $self->name,
+        'before',
+        $name,
+        $code,
+    );
+}
+
+sub add_around_method_modifier {
+    my ($self, $name, $code) = @_;
+    require Class::Method::Modifiers;
+    Class::Method::Modifiers::_install_modifier(
+        $self->name,
+        'around',
+        $name,
+        $code,
+    );
+}
+
+sub add_after_method_modifier {
+    my ($self, $name, $code) = @_;
+    require Class::Method::Modifiers;
+    Class::Method::Modifiers::_install_modifier(
+        $self->name,
+        'after',
+        $name,
+        $code,
+    );
+}
+
+sub roles { $_[0]->{roles} }
+
+sub does_role {
+    my ($self, $role_name) = @_;
+    (defined $role_name)
+        || confess "You must supply a role name to look for";
+    for my $role (@{ $self->{roles} }) {
+        return 1 if $role->name eq $role_name;
+    }
+    return 0;
+}
+
+sub create {
+    my ( $class, @args ) = @_;
+
+    unshift @args, 'package' if @args % 2 == 1;
+
+    my (%options) = @args;
+    my $package_name = $options{package};
+
+    (ref $options{superclasses} eq 'ARRAY')
+        || confess "You must pass an ARRAY ref of superclasses"
+            if exists $options{superclasses};
+            
+    (ref $options{attributes} eq 'ARRAY')
+        || confess "You must pass an ARRAY ref of attributes"
+            if exists $options{attributes};      
+            
+    (ref $options{methods} eq 'HASH')
+        || confess "You must pass a HASH ref of methods"
+            if exists $options{methods};                  
+
+    do {
+        # XXX should I implement Mouse::Meta::Module?
+        my $package_name = $options{package};
+
+        ( defined $package_name && $package_name )
+          || confess "You must pass a package name";
+
+        my $code = "package $package_name;";
+        $code .= "\$$package_name\:\:VERSION = '" . $options{version} . "';"
+          if exists $options{version};
+        $code .= "\$$package_name\:\:AUTHORITY = '" . $options{authority} . "';"
+          if exists $options{authority};
+
+        eval $code;
+        confess "creation of $package_name failed : $@" if $@;
+    };
+
+    my (%initialize_options) = @args;
+    delete @initialize_options{qw(
+        package
+        superclasses
+        attributes
+        methods
+        version
+        authority
+    )};
+    my $meta = $class->initialize( $package_name => %initialize_options );
+
+    # FIXME totally lame
+    $meta->add_method('meta' => sub {
+        $class->initialize(ref($_[0]) || $_[0]);
+    });
+
+    $meta->superclasses(@{$options{superclasses}})
+        if exists $options{superclasses};
+    # NOTE:
+    # process attributes first, so that they can
+    # install accessors, but locally defined methods
+    # can then overwrite them. It is maybe a little odd, but
+    # I think this should be the order of things.
+    if (exists $options{attributes}) {
+        foreach my $attr (@{$options{attributes}}) {
+            Mouse::Meta::Attribute->create($meta, $attr->{name}, %$attr);
+        }
+    }
+    if (exists $options{methods}) {
+        foreach my $method_name (keys %{$options{methods}}) {
+            $meta->add_method($method_name, $options{methods}->{$method_name});
+        }
+    }
+    return $meta;
+}
+
+{
+    my $ANON_CLASS_SERIAL = 0;
+    my $ANON_CLASS_PREFIX = 'Mouse::Meta::Class::__ANON__::SERIAL::';
+    sub create_anon_class {
+        my ( $class, %options ) = @_;
+        my $package_name = $ANON_CLASS_PREFIX . ++$ANON_CLASS_SERIAL;
+        return $class->create( $package_name, %options );
+    }
+}
 
 1;
 
@@ -137,5 +337,14 @@ Returns the L<Mouse::Meta::Attribute> with the given name.
 
 Returns the list of classes in method dispatch order, with duplicates removed.
 
+=head2 clone_object Instance -> Instance
+
+Clones the given C<Instance> which must be an instance governed by this
+metaclass.
+
+=head2 clone_instance Instance, Parameters -> Instance
+
+Clones the given C<Instance> and sets any additional parameters.
+
 =cut