1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
package Moose::Meta::TypeConstraint::Registry;
use strict;
use warnings;
use metaclass;
use Scalar::Util 'blessed';
our $VERSION = '1.09';
$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
use base 'Class::MOP::Object';
__PACKAGE__->meta->add_attribute('parent_registry' => (
reader => 'get_parent_registry',
writer => 'set_parent_registry',
predicate => 'has_parent_registry',
));
__PACKAGE__->meta->add_attribute('type_constraints' => (
reader => 'type_constraints',
default => sub { {} }
));
sub new {
my $class = shift;
my $self = $class->_new(@_);
return $self;
}
sub has_type_constraint {
my ($self, $type_name) = @_;
($type_name and exists $self->type_constraints->{$type_name}) ? 1 : 0
}
sub get_type_constraint {
my ($self, $type_name) = @_;
return unless defined $type_name;
$self->type_constraints->{$type_name}
}
sub add_type_constraint {
my ($self, $type) = @_;
unless ( $type && blessed $type && $type->isa('Moose::Meta::TypeConstraint') ) {
require Moose;
Moose->throw_error("No type supplied / type is not a valid type constraint");
}
$self->type_constraints->{$type->name} = $type;
}
sub find_type_constraint {
my ($self, $type_name) = @_;
return $self->get_type_constraint($type_name)
if $self->has_type_constraint($type_name);
return $self->get_parent_registry->find_type_constraint($type_name)
if $self->has_parent_registry;
return;
}
1;
__END__
=pod
=head1 NAME
Moose::Meta::TypeConstraint::Registry - registry for type constraints
=head1 DESCRIPTION
This class is a registry that maps type constraint names to
L<Moose::Meta::TypeConstraint> objects.
Currently, it is only used internally by
L<Moose::Util::TypeConstraints>, which creates a single global
registry.
=head1 INHERITANCE
C<Moose::Meta::TypeConstraint::Registry> is a subclass of
L<Class::MOP::Object>.
=head1 METHODS
=over 4
=item B<< Moose::Meta::TypeConstraint::Registry->new(%options) >>
This creates a new registry object based on the provided C<%options>:
=over 8
=item * parent_registry
This is an optional L<Moose::Meta::TypeConstraint::Registry>
object.
=item * type_constraints
This is hash reference of type names to type objects. This is
optional. Constraints can be added to the registry after it is
created.
=back
=item B<< $registry->get_parent_registry >>
Returns the registry's parent registry, if it has one.
=item B<< $registry->has_parent_registry >>
Returns true if the registry has a parent.
=item B<< $registry->set_parent_registry($registry) >>
Sets the parent registry.
=item B<< $registry->get_type_constraint($type_name) >>
This returns the L<Moose::Meta::TypeConstraint> object from the
registry for the given name, if one exists.
=item B<< $registry->has_type_constraint($type_name) >>
Returns true if the registry has a type of the given name.
=item B<< $registry->add_type_constraint($type) >>
Adds a new L<Moose::Meta::TypeConstraint> object to the registry.
=item B<< $registry->find_type_constraint($type_name) >>
This method looks in the current registry for the named type. If the
type is not found, then this method will look in the registry's
parent, if it has one.
=back
=head1 BUGS
See L<Moose/BUGS> for details on reporting bugs.
=head1 AUTHOR
Stevan Little E<lt>stevan@iinteractive.comE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright 2006-2010 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=cut
|
