/[Frey]/trunk/lib/Frey/ClassLoader.pm
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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revision 100 by dpavlin, Fri Jul 11 19:19:42 2008 UTC revision 308 by dpavlin, Wed Nov 5 19:13:01 2008 UTC
# Line 1  Line 1 
1  package Frey::ClassLoader;  package Frey::ClassLoader;
2  use Moose;  use Moose;
3    
4    =head1 DESCRIPTION
5    
6    Load L<Frey> classes
7    
8    =cut
9    
10  extends 'Frey';  extends 'Frey';
11    
12  use Data::Dump qw/dump/;  use Data::Dump qw/dump/;
13  use File::Find;  use File::Find;
14    
15  has 'classes' => (  our $class_path;
16          is => 'ro',  our @classes;
17  #       isa => 'HashRef[Str]',  
18          default => sub {  =head2 classes
19                  my $self = shift;  
20                  # FIXME there must be better way to do this in Moose style    my @classes = $o->classes;
21                  my $classes;  
22                  finddepth({ no_chdir => 1, wanted => sub {  =cut
23                          return unless s/\.pm$//;  
24                          my @a = split(m!/!,$_);  sub classes {
25                          my $package = join('::', @a[ 1 .. $#a ]);          my $self = shift;
26                          warn ">> $_ ",dump( @a ), " >> $package\n" if $self->debug;          return @classes if @classes;
27                          push @$classes, { $package => "$_.pm" };  
28                  } }, 'lib');          # FIXME there must be better way to do this in Moose style
29                  warn "## classes = ",dump( $classes ) if $self->debug;          finddepth({ no_chdir => 1, wanted => sub {
30                  $classes;                  return unless s/\.pm$//;
31          },                  my @a = split(m!/!,$_);
32          lazy => 1,                  my $class = join('::', @a[ 1 .. $#a ]);
33  );                  warn ">> $_ ",dump( @a ), " >> $class\n" if $self->debug;
34                    $class_path->{ $class } = "$_.pm";
35            } }, 'lib');
36            warn "## class_path = ",dump( $class_path ) if $self->debug;
37    
38            @classes = sort keys %$class_path;
39    }
40    
41    =head2 class_path
42    
43      $path = $o->class_path( $class );
44    
45    =cut
46    
47    sub class_path {
48            my ( $self, $class ) = @_;
49            $self->classes unless $class_path;
50            confess "can't find path for class $class" unless defined $class_path->{$class};
51            return $class_path->{$class};
52    }
53    
54    =head2 loaded_classes
55    
56      my $available = $o->loaded_classes;
57      $available->{'Frey'} # true
58    
59    =cut
60    
61  =head2 load_package  our $loaded_class;
62    sub loaded_classes { $loaded_class };
63    
64    my ( $class, $meta, $is_role ) = $o->load_package( 'Some::Package' );  =head2 class_meta
65    
66      my ( $meta, $is_role ) = $o->class_meta( 'Some::Class' );
67    
68  =cut  =cut
69    
70  sub load_package {  sub class_meta {
71          my ( $self, $package ) = @_;          my ( $self, $class ) = @_;
72    
73            $class ||= $self->class if $self->can('class');
74            warn "# class_meta $class";
75    
76          #intercept role application so we can accurately generate          $self->load_class($class);
77          #method and attribute information for the parent class.  
78          #this is fragile, but there is not better way that i am aware of          if ( ! $class->can('meta') ) {
79          my $rmeta = Moose::Meta::Role->meta;                  my $instance = Moose::Meta::Class->create_anon_class;
80          $rmeta->make_mutable if $rmeta->is_immutable;                  warn "class $class isn't Moose, faking anon class";
81          my $original_apply = $rmeta->get_method("apply")->body;                  return ( $instance, 0 );
82          $rmeta->remove_method("apply");          }
         my @roles_to_apply;  
         $rmeta->add_method("apply", sub{push(@roles_to_apply, [@_])});  
         #load the package with the hacked Moose::Meta::Role  
   
         #eval { Class::MOP::load_class($package); };  
         #confess "Failed to load package ${package} $@" if $@;  
         Class::MOP::load_class($package);  
83    
84          my $meta = $package->meta;          my $meta;
85            my $is_role = 0;
86            my $instance;
87    
88          my ($class, $is_role);          if($class->meta->isa('Moose::Meta::Role')){
         if($package->meta->isa('Moose::Meta::Role')){  
89                  $is_role = 1;                  $is_role = 1;
90                  # we need to apply the role to a class to be able to properly introspect it                  $instance = Moose::Meta::Class->create_anon_class;
91                  $class = Moose::Meta::Class->create_anon_class;                  $class->meta->apply( $instance );
92                  $original_apply->($meta, $class);                  $meta = $instance->meta;
93                    die $@ if $@;
94          } else {          } else {
95                  #roles don't have superclasses ...                  $meta = $class->meta;
                 $class = $meta;  
96          }          }
97          return ( $class, $meta, $is_role );          return ( $meta, $is_role );
98  }  }
99    
100    sub load_class {
101            my ( $self, $class ) = @_;
102            eval {
103                    Class::MOP::load_class($class) if ! $loaded_class->{$class}++;
104            };
105            warn $@ if $@; # && $@ !~ m/role/;
106            warn "# load_class $class" if $loaded_class->{$class} == 1;
107    }
108    
109    sub load_all_classes {
110            my $self = shift;
111            warn "# loaded_class = ",dump( $loaded_class );
112            $self->load_class( $_ ) foreach ( $self->classes );
113            $loaded_class;
114    }
115    
116  1;  1;
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