Metaclass->add_method

[gitmo/Mouse.git] / lib / Mouse / Meta / Attribute.pm

diff --git a/lib/Mouse/Meta/Attribute.pm b/lib/Mouse/Meta/Attribute.pm
index 050ec49..0d7f824 100644 (file)
--- a/lib/Mouse/Meta/Attribute.pm
+++ b/lib/Mouse/Meta/Attribute.pm
@@ -20,22 +20,22 @@ sub new {
     bless \%args, $class;
 }
 
-sub name              { $_[0]->{name}            }
-sub class             { $_[0]->{class}           }
-sub _is_metadata      { $_[0]->{is}              }
-sub is_required       { $_[0]->{required}        }
-sub default           { $_[0]->{default}         }
-sub is_lazy           { $_[0]->{lazy}            }
-sub is_lazy_build     { $_[0]->{lazy_build}      }
-sub predicate         { $_[0]->{predicate}       }
-sub clearer           { $_[0]->{clearer}         }
-sub handles           { $_[0]->{handles}         }
-sub is_weak_ref       { $_[0]->{weak_ref}        }
-sub init_arg          { $_[0]->{init_arg}        }
-sub type_constraint   { $_[0]->{type_constraint} }
-sub trigger           { $_[0]->{trigger}         }
-sub builder           { $_[0]->{builder}         }
-sub should_auto_deref { $_[0]->{auto_deref}      }
+sub name              { $_[0]->{name}             }
+sub associated_class  { $_[0]->{associated_class} }
+sub _is_metadata      { $_[0]->{is}               }
+sub is_required       { $_[0]->{required}         }
+sub default           { $_[0]->{default}          }
+sub is_lazy           { $_[0]->{lazy}             }
+sub is_lazy_build     { $_[0]->{lazy_build}       }
+sub predicate         { $_[0]->{predicate}        }
+sub clearer           { $_[0]->{clearer}          }
+sub handles           { $_[0]->{handles}          }
+sub is_weak_ref       { $_[0]->{weak_ref}         }
+sub init_arg          { $_[0]->{init_arg}         }
+sub type_constraint   { $_[0]->{type_constraint}  }
+sub trigger           { $_[0]->{trigger}          }
+sub builder           { $_[0]->{builder}          }
+sub should_auto_deref { $_[0]->{auto_deref}       }
 
 sub has_default         { exists $_[0]->{default}         }
 sub has_predicate       { exists $_[0]->{predicate}       }
@@ -56,11 +56,15 @@ sub generate_accessor {
     my $name       = $attribute->name;
     my $key        = $name;
     my $default    = $attribute->default;
-    my $trigger    = $attribute->trigger;
     my $type       = $attribute->type_constraint;
     my $constraint = $attribute->find_type_constraint;
     my $builder    = $attribute->builder;
 
+    my $trigger = $attribute->trigger;
+    my $before  = $trigger->{before};
+    my $after   = $trigger->{after};
+    my $around  = $trigger->{around};
+
     my $accessor = 'sub {
         my $self = shift;';
 
@@ -68,21 +72,36 @@ sub generate_accessor {
         $accessor .= 'if (@_) {
             local $_ = $_[0];';
 
-        if ($constraint) {
-            $accessor .= 'do {
-                my $display = defined($_) ? overload::StrVal($_) : "undef";
-                Carp::confess("Attribute ($name) does not pass the type constraint because: Validation failed for \'$type\' failed with value $display") unless $constraint->();
-            };'
+        if ($before) {
+            $accessor .= '$before->($self, $_, $attribute);';
+        }
+
+        if ($around) {
+            $accessor .= '$around->(sub {
+                my $self = shift;
+                $_ = $_[0];
+            ';
         }
 
-        $accessor .= '$self->{$key} = $_;';
+            if ($constraint) {
+                $accessor .= 'unless ($constraint->()) {
+                        my $display = defined($_) ? overload::StrVal($_) : "undef";
+                        Carp::confess("Attribute ($name) does not pass the type constraint because: Validation failed for \'$type\' failed with value $display");
+                }'
+            }
+
+            $accessor .= '$self->{$key} = $_;';
 
-        if ($attribute->is_weak_ref) {
-            $accessor .= 'Scalar::Util::weaken($self->{$key}) if ref($self->{$key});';
+            if ($attribute->is_weak_ref) {
+                $accessor .= 'Scalar::Util::weaken($self->{$key}) if ref($self->{$key});';
+            }
+
+        if ($around) {
+            $accessor .= '}, $self, $_, $attribute);';
         }
 
-        if ($trigger) {
-            $accessor .= '$trigger->($self, $_, $attribute);';
+        if ($after) {
+            $accessor .= '$after->($self, $_, $attribute);';
         }
 
         $accessor .= '}';
@@ -165,7 +184,7 @@ sub create {
     my ($self, $class, $name, %args) = @_;
 
     $args{name} = $name;
-    $args{class} = $class;
+    $args{associated_class} = $class;
 
     %args = $self->canonicalize_args($name, %args);
     $self->validate_args($name, \%args);
@@ -248,17 +267,24 @@ sub validate_args {
         if ref($args->{default})
         && ref($args->{default}) ne 'CODE';
 
-    confess "You cannot auto-dereference without specifying a type constraint on attribute $name"
+    confess "You cannot auto-dereference without specifying a type constraint on attribute ($name)"
         if $args->{auto_deref} && !exists($args->{isa});
 
-    confess "You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute $name"
+    confess "You cannot auto-dereference anything other than a ArrayRef or HashRef on attribute ($name)"
         if $args->{auto_deref}
         && $args->{isa} ne 'ArrayRef'
         && $args->{isa} ne 'HashRef';
 
-    confess "Trigger must be a CODE or HASH ref on attribute ($name)"
-        if $args{trigger}
-        && ref($args{trigger}) ne 'CODE' && ref($args{trigger}) ne 'HASH';
+    if ($args->{trigger}) {
+        if (ref($args->{trigger}) eq 'CODE') {
+            $args->{trigger} = {
+                after => $args->{trigger},
+            };
+        }
+
+        confess "Trigger must be a CODE or HASH ref on attribute ($name)"
+            if ref($args->{trigger}) ne 'HASH';
+    }
 
     return 1;
 }
@@ -349,7 +375,7 @@ installed. Some error checking is done.
 
 =head2 name -> AttributeName
 
-=head2 class -> OwnerClass
+=head2 associated_class -> OwnerClass
 
 =head2 is_required -> Bool