/[Frey]/trunk/lib/Frey/Class/Loader.pm
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revision 112 by dpavlin, Sun Jul 13 16:54:13 2008 UTC revision 431 by dpavlin, Wed Nov 19 00:40:03 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  our $package_path;  our $class_path;
16  our @classes;  our @classes;
17    
18    =head2 classes
19    
20    Return all local classes by reading from disk
21    
22      my @classes = $o->classes;
23    
24    =cut
25    
26  sub classes {  sub classes {
27          my $self = shift;          my $self = shift;
28          return @classes if @classes;          return @classes if @classes;
# Line 17  sub classes { Line 31  sub classes {
31          finddepth({ no_chdir => 1, wanted => sub {          finddepth({ no_chdir => 1, wanted => sub {
32                  return unless s/\.pm$//;                  return unless s/\.pm$//;
33                  my @a = split(m!/!,$_);                  my @a = split(m!/!,$_);
34                  my $package = join('::', @a[ 1 .. $#a ]);                  my $class = join('::', @a[ 1 .. $#a ]);
35                  warn ">> $_ ",dump( @a ), " >> $package\n" if $self->debug;                  warn ">> $_ ",dump( @a ), " >> $class\n" if $self->debug;
36                  $package_path->{ $package } = "$_.pm";                  $class_path->{ $class } = "$_.pm";
37          } }, 'lib');          } }, 'lib');
38          warn "## package_path = ",dump( $package_path ) if $self->debug;          warn "## class_path = ",dump( $class_path ) if $self->debug;
39    
40          @classes = sort keys %$package_path;          @classes = sort keys %$class_path;
41  }  }
42    
43  sub package_path {  =head2 class_path
44          my ( $self, $package ) = @_;  
45          die "can't find path for package $package" unless defined $package_path->{$package};  Return any local or loaded class
46          return $package_path->{$package};  
47      $path = $o->class_path( $class );
48    
49    =cut
50    
51    sub class_path {
52            my ( $self, $class ) = @_;
53            $self->classes unless $class_path;
54            if ( ! defined $class_path->{$class} ) {
55                    my $path = $class;
56                    $path =~ s{::}{/}g;
57                    $path .= '.pm';
58                    $path = $INC{$path};
59                    warn "# $class from INC $path";
60                    $class_path->{$class} = $path || confess "can't find path for $class";
61            }
62            return $class_path->{$class};
63  }  }
64    
65  =head2 load_package  =head2 loaded_classes
66    
67    my ( $class, $meta, $is_role ) = $o->load_package( 'Some::Package' );    my $available = $o->loaded_classes;
68      $available->{'Frey'} # true
69    
70  =cut  =cut
71    
72  sub load_package {  our $loaded_class;
73          my ( $self, $package ) = @_;  sub loaded_classes { $loaded_class };
74    
75          #intercept role application so we can accurately generate  =head2 class_meta
         #method and attribute information for the parent class.  
         #this is fragile, but there is not better way that i am aware of  
         my $rmeta = Moose::Meta::Role->meta;  
         $rmeta->make_mutable if $rmeta->is_immutable;  
         my $original_apply = $rmeta->get_method("apply")->body;  
         $rmeta->remove_method("apply");  
         my @roles_to_apply;  
         $rmeta->add_method("apply", sub{push(@roles_to_apply, [@_])});  
         #load the package with the hacked Moose::Meta::Role  
76    
77          #eval { Class::MOP::load_class($package); };    my ( $meta, $is_role, $instance ) = $o->class_meta( 'Some::Class' );
         #confess "Failed to load package ${package} $@" if $@;  
         Class::MOP::load_class($package);  
78    
79          if ( ! $package->can('meta') ) {  =cut
80                  my $class = Moose::Meta::Class->create_anon_class;  
81                  warn "package $package doesn't have meta faking anon class";  sub class_meta {
82                  return ( $class, $class->meta, 0 );          my ( $self, $class ) = @_;
         }  
83    
84          my $meta = $package->meta;          $class ||= $self->class if $self->can('class');
85            warn "# class_meta $class";
86    
87          my ($class, $is_role);          $self->load_class($class);
88          if($package->meta->isa('Moose::Meta::Role')){  
89            my $meta;
90            my $is_role = 0;
91            my $instance;
92    
93            if ( ! $class->can('meta') ) {
94                    $instance = Moose::Meta::Class->create_anon_class;
95                    warn "class $class isn't Moose, faking anon class" if $self->debug;
96                    $meta = $instance->meta;
97            } elsif( $class->meta->isa('Moose::Meta::Role') ) {
98                  $is_role = 1;                  $is_role = 1;
99                  # we need to apply the role to a class to be able to properly introspect it                  $instance = Frey->new;
100                  $class = Moose::Meta::Class->create_anon_class;                  warn "# apply $class on $instance";
101                  $original_apply->($meta, $class);                  $class->meta->apply( $instance );
102                    $meta = $instance->meta;
103          } else {          } else {
104                  #roles don't have superclasses ...                  $meta = $class->meta;
                 $class = $meta;  
105          }          }
106          return ( $class, $meta, $is_role );          return ( $meta, $is_role, $instance );
107    }
108    
109    sub load_class {
110            my ( $self, $class ) = @_;
111            eval {
112                    Class::MOP::load_class($class) if ! $loaded_class->{$class}++;
113            };
114            warn $@ if $@; # && $@ !~ m/role/;
115            warn "# load_class $class" if $self->debug && $loaded_class->{$class} == 1;
116  }  }
117    
118  sub load_all_classes {  sub load_all_classes {
119          my $self = shift;          my $self = shift;
120          my $loaded = 0;          warn "# loaded_class = ",dump( $loaded_class ) if $self->debug;
121          foreach ( $self->classes ) {          $self->load_class( $_ ) foreach ( $self->classes );
122                  Class::MOP::load_class($_);          $loaded_class;
123                  $loaded++;  }
124    
125    =head2 class_methods
126    
127      my @all_methods = $o->class_methods( $class );
128    
129      my $class_method = $o->class_methods( $class );
130      if ( $class_method->{ $method } ) {
131            # $class has $method
132      }
133    
134    =cut
135    
136    sub class_methods {
137            my ( $self, $class ) = @_;
138    
139            confess "need class" unless $class;
140            if ( ! $class->can('meta') ) {
141                    warn "$class doesn't have meta (isn't Moose class)" if $self->debug;
142                    return;
143          }          }
144          $loaded;          my $meta = $class->meta;
145    
146            my $attr;
147            my $methods;
148            $attr->{$_}++ foreach $meta->get_attribute_list;
149            my @methods = map { $methods->{$_}++; $_ } grep { ! defined($attr->{$_}) && $_ ne 'meta' } $meta->get_method_list;
150            warn "# methods = ",dump( @methods ) if $self->debug;
151    
152            return @methods if wantarray;
153            return $methods;
154  }  }
155    
156  1;  1;
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