/[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 101 by dpavlin, Fri Jul 11 22:54:42 2008 UTC revision 408 by dpavlin, Tue Nov 18 12:55:32 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;
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 $self = shift;
28          return keys %$package_path if $package_path;          return @classes if @classes;
29    
30          # FIXME there must be better way to do this in Moose style          # FIXME there must be better way to do this in Moose style
31          finddepth({ no_chdir => 1, wanted => sub {          finddepth({ no_chdir => 1, wanted => sub {
32                  return unless s/\.pm$//;                  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 $self->debug;
39    
40          return keys %$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 $available = $o->loaded_classes;
68      $available->{'Frey'} # true
69    
70    my ( $class, $meta, $is_role ) = $o->load_package( 'Some::Package' );  =cut
71    
72    our $loaded_class;
73    sub loaded_classes { $loaded_class };
74    
75    =head2 class_meta
76    
77      my ( $meta, $is_role ) = $o->class_meta( 'Some::Class' );
78    
79  =cut  =cut
80    
81  sub load_package {  sub class_meta {
82          my ( $self, $package ) = @_;          my ( $self, $class ) = @_;
83    
84          #intercept role application so we can accurately generate          $class ||= $self->class if $self->can('class');
85          #method and attribute information for the parent class.          warn "# class_meta $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;  
         $rmeta->add_method("apply", sub{push(@roles_to_apply, [@_])});  
         #load the package with the hacked Moose::Meta::Role  
86    
87          #eval { Class::MOP::load_class($package); };          $self->load_class($class);
         #confess "Failed to load package ${package} $@" if $@;  
         Class::MOP::load_class($package);  
88    
89          if ( ! $package->can('meta') ) {          if ( ! $class->can('meta') ) {
90                  my $class = Moose::Meta::Class->create_anon_class;                  my $instance = Moose::Meta::Class->create_anon_class;
91                  warn "package $package doesn't have meta faking anon class";                  warn "class $class isn't Moose, faking anon class";
92                  return ( $class, $class->meta, 0 );                  return ( $instance, 0 );
93          }          }
94    
95          my $meta = $package->meta;          my $meta;
96            my $is_role = 0;
97            my $instance;
98    
99          my ($class, $is_role);          if($class->meta->isa('Moose::Meta::Role')){
         if($package->meta->isa('Moose::Meta::Role')){  
100                  $is_role = 1;                  $is_role = 1;
101                  # we need to apply the role to a class to be able to properly introspect it                  $instance = Moose::Meta::Class->create_anon_class;
102                  $class = Moose::Meta::Class->create_anon_class;                  $class->meta->apply( $instance );
103                  $original_apply->($meta, $class);                  $meta = $class->meta;
104                    die $@ if $@;
105          } else {          } else {
106                  #roles don't have superclasses ...                  $meta = $class->meta;
                 $class = $meta;  
107          }          }
108          return ( $class, $meta, $is_role );          return ( $meta, $is_role );
109    }
110    
111    sub load_class {
112            my ( $self, $class ) = @_;
113            eval {
114                    Class::MOP::load_class($class) if ! $loaded_class->{$class}++;
115            };
116            warn $@ if $@; # && $@ !~ m/role/;
117            warn "# load_class $class" if $self->debug && $loaded_class->{$class} == 1;
118  }  }
119    
120  sub load_all_classes {  sub load_all_classes {
121          my $self = shift;          my $self = shift;
122          my $loaded = 0;          warn "# loaded_class = ",dump( $loaded_class ) if $self->debug;
123          foreach ( $self->classes ) {          $self->load_class( $_ ) foreach ( $self->classes );
124                  Class::MOP::load_class($_);          $loaded_class;
125                  $loaded++;  }
126    
127    =head2 class_methods
128    
129      my @methods = $o->class_methods( $class );
130    
131    =cut
132    
133    sub class_methods {
134            my ( $self, $class ) = @_;
135    
136            confess "need class" unless $class;
137            if ( ! $class->can('meta') ) {
138                    warn "$class doesn't have meta (isn't Moose class)";
139                    return;
140          }          }
141          $loaded;          my $meta = $class->meta;
142    
143            my $attr;
144            $attr->{$_}++ foreach $meta->get_attribute_list;
145            my @methods = grep { ! defined($attr->{$_}) } $meta->get_method_list;
146            warn "# methods = ",dump( @methods ) if $self->debug;
147    
148            return @methods;
149  }  }
150    
151    
152  1;  1;
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