X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMouse%2FAttribute.pm;h=1e60e214abd27bb2226aaaa68cb234dcf772f5bd;hb=446d2d2c808c8d85b8845659755ec6078dcd7ea9;hp=22e86e03f3c0e065db4763f47fc3498a0178dadd;hpb=186657a92e5f7f1466dfdc7928f84be2f4c0ece1;p=gitmo%2FMouse.git

diff --git a/lib/Mouse/Attribute.pm b/lib/Mouse/Attribute.pm
index 22e86e0..1e60e21 100644
--- a/lib/Mouse/Attribute.pm
+++ b/lib/Mouse/Attribute.pm
@@ -18,34 +18,61 @@ sub new {
 
 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 predicate       { $_[0]->{predicate}       }
 sub clearer         { $_[0]->{clearer}         }
 sub handles         { $_[0]->{handles}         }
 sub 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 has_default         { exists $_[0]->{default}         }
+sub has_predicate       { exists $_[0]->{predicate}       }
+sub has_clearer         { exists $_[0]->{clearer}         }
+sub has_handles         { exists $_[0]->{handles}         }
+sub has_weak_ref        { exists $_[0]->{weak_ref}        }
+sub has_init_arg        { exists $_[0]->{init_arg}        }
+sub has_type_constraint { exists $_[0]->{type_constraint} }
+sub has_trigger         { exists $_[0]->{trigger}         }
+sub has_builder         { exists $_[0]->{builder}         }
 
 sub generate_accessor {
     my $attribute = shift;
 
-    my $key     = $attribute->{init_arg};
-    my $default = $attribute->{default};
-    my $trigger = $attribute->{trigger};
+    my $name       = $attribute->name;
+    my $key        = $attribute->init_arg;
+    my $default    = $attribute->default;
+    my $trigger    = $attribute->trigger;
+    my $type       = $attribute->type_constraint;
+    my $constraint = $attribute->find_type_constraint;
 
     my $accessor = 'sub {
         my $self = shift;';
 
-    if ($attribute->{is} eq 'rw') {
+    if ($attribute->_is_metadata eq 'rw') {
         $accessor .= 'if (@_) {
-            $self->{$key} = $_[0];';
+            local $_ = $_[0];';
 
-        if ($attribute->{weak_ref}) {
+        if ($constraint) {
+            $accessor .= 'do {
+                my $display = defined($_) ? $_ : "undef";
+                Carp::confess("Attribute ($name) does not pass the type constraint because: Validation failed for \'$type\' failed with value $display") unless $constraint->();
+            };'
+        }
+
+        $accessor .= '$self->{$key} = $_;';
+
+        if ($attribute->weak_ref) {
             $accessor .= 'Scalar::Util::weaken($self->{$key});';
         }
 
         if ($trigger) {
-            $accessor .= '$trigger->($self, $_[0], $attribute);';
+            $accessor .= '$trigger->($self, $_, $attribute);';
         }
 
         $accessor .= '}';
@@ -53,9 +80,9 @@ sub generate_accessor {
     else {
     }
 
-    if ($attribute->{lazy}) {
+    if ($attribute->is_lazy) {
         $accessor .= '$self->{$key} = ';
-        $accessor .= ref($attribute->{default}) eq 'CODE'
+        $accessor .= ref($default) eq 'CODE'
                    ? '$default->($self)'
                    : '$default';
         $accessor .= ' if !exists($self->{$key});';
@@ -69,7 +96,7 @@ sub generate_accessor {
 
 sub generate_predicate {
     my $attribute = shift;
-    my $key = $attribute->{init_arg};
+    my $key = $attribute->init_arg;
 
     my $predicate = 'sub { exists($_[0]->{$key}) }';
 
@@ -78,7 +105,7 @@ sub generate_predicate {
 
 sub generate_clearer {
     my $attribute = shift;
-    my $key = $attribute->{init_arg};
+    my $key = $attribute->init_arg;
 
     my $predicate = 'sub { delete($_[0]->{$key}) }';
 
@@ -87,12 +114,12 @@ sub generate_clearer {
 
 sub generate_handles {
     my $attribute = shift;
-    my $reader = $attribute->{name};
+    my $reader = $attribute->name;
 
     my %method_map;
 
-    for my $local_method (keys %{ $attribute->{handles} }) {
-        my $remote_method = $attribute->{handles}{$local_method};
+    for my $local_method (keys %{ $attribute->handles }) {
+        my $remote_method = $attribute->handles->{$local_method};
 
         my $method = 'sub {
             my $self = shift;
@@ -134,22 +161,23 @@ sub create {
     $meta->add_attribute($attribute);
 
     # install an accessor
-    if ($attribute->{is} eq 'rw' || $attribute->{is} eq 'ro') {
+    if ($attribute->_is_metadata eq 'rw' || $attribute->_is_metadata eq 'ro') {
         my $accessor = $attribute->generate_accessor;
         no strict 'refs';
         *{ $class . '::' . $name } = $accessor;
     }
 
     for my $method (qw/predicate clearer/) {
-        if (exists $attribute->{$method}) {
+        my $predicate = "has_$method";
+        if ($attribute->$predicate) {
             my $generator = "generate_$method";
             my $coderef = $attribute->$generator;
             no strict 'refs';
-            *{ $class . '::' . $attribute->{$method} } = $coderef;
+            *{ $class . '::' . $attribute->$method } = $coderef;
         }
     }
 
-    if ($attribute->{handles}) {
+    if ($attribute->has_handles) {
         my $method_map = $attribute->generate_handles;
         for my $method_name (keys %$method_map) {
             no strict 'refs';
@@ -160,6 +188,34 @@ sub create {
     return $attribute;
 }
 
+sub find_type_constraint {
+    my $self = shift;
+    my $type = $self->type_constraint;
+
+    return unless $type;
+
+    my $checker = Mouse::TypeRegistry->optimized_constraints->{$type};
+    return $checker if $checker;
+
+    confess "Unable to parse type constraint '$type'";
+}
+
+sub verify_type_constraint {
+    my $self = shift;
+    local $_ = shift;
+
+    my $type = $self->type_constraint
+        or return 1;
+    my $constraint = $self->find_type_constraint
+        or return 1;
+
+    return 1 if $constraint->($_);
+
+    my $name = $self->name;
+    local $_ = "undef" unless defined($_);
+    Carp::confess("Attribute ($name) does not pass the type constraint because: Validation failed for \'$type\' failed with value $_");
+}
+
 1;
 
 __END__