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1 | package MooseX::Types::TypeDecorator; |
2 | |
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3 | use strict; |
4 | use warnings; |
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5 | |
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6 | use Carp::Clan qw( ^MooseX::Types ); |
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7 | use Moose::Util::TypeConstraints (); |
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8 | use Moose::Meta::TypeConstraint::Union; |
9 | |
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10 | use overload( |
11 | '""' => sub { |
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12 | return shift->__type_constraint->name; |
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13 | }, |
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14 | '|' => sub { |
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15 | |
16 | ## It's kind of ugly that we need to know about Union Types, but this |
17 | ## is needed for syntax compatibility. Maybe someday we'll all just do |
18 | ## Or[Str,Str,Int] |
19 | |
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20 | my @tc = grep {ref $_} @_; |
21 | my $union = Moose::Meta::TypeConstraint::Union->new(type_constraints=>\@tc); |
22 | return Moose::Util::TypeConstraints::register_type_constraint($union); |
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23 | }, |
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24 | ); |
25 | |
26 | =head1 NAME |
27 | |
28 | MooseX::Types::TypeDecorator - More flexible access to a Type Constraint |
29 | |
30 | =head1 DESCRIPTION |
31 | |
32 | This is a decorator object that contains an underlying type constraint. We use |
33 | this to control access to the type constraint and to add some features. |
34 | |
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35 | =head1 METHODS |
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36 | |
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37 | This class defines the following methods. |
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38 | |
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39 | =head2 new |
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40 | |
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41 | Old school instantiation |
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42 | |
43 | =cut |
44 | |
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45 | sub new { |
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46 | my $class = shift @_; |
47 | if(my $arg = shift @_) { |
48 | if(ref $arg && $arg->isa('Moose::Meta::TypeConstraint')) { |
49 | return bless {'__type_constraint'=>$arg}, $class; |
50 | } elsif(ref $arg && $arg->isa('MooseX::Types::UndefinedType')) { |
51 | ## stub in case we'll need to handle these types differently |
52 | return bless {'__type_constraint'=>$arg}, $class; |
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53 | } elsif(ref $arg) { |
54 | croak "Argument must be ->isa('Moose::Meta::TypeConstraint') or ->isa('MooseX::Types::UndefinedType'), not ". ref $arg; |
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55 | } else { |
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56 | croak "Argument cannot be '$arg'"; |
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57 | } |
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58 | } else { |
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59 | croak "This method [new] requires a single argument of 'arg'."; |
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60 | } |
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61 | } |
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62 | |
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63 | =head __type_constraint ($type_constraint) |
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64 | |
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65 | Set/Get the type_constraint. |
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66 | |
67 | =cut |
68 | |
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69 | sub __type_constraint { |
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70 | my $self = shift @_; |
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71 | if(defined(my $tc = shift @_)) { |
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72 | $self->{__type_constraint} = $tc; |
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73 | } |
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74 | return $self->{__type_constraint}; |
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75 | } |
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76 | |
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77 | =head2 isa |
78 | |
79 | handle $self->isa since AUTOLOAD can't. |
80 | |
81 | =cut |
82 | |
83 | sub isa { |
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84 | my ($self, $target) = @_; |
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85 | if(defined $target) { |
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86 | return $self->__type_constraint->isa($target); |
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87 | } else { |
88 | return; |
89 | } |
90 | } |
91 | |
92 | =head2 can |
93 | |
94 | handle $self->can since AUTOLOAD can't. |
95 | |
96 | =cut |
97 | |
98 | sub can { |
99 | my ($self, $target) = @_; |
100 | if(defined $target) { |
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101 | return $self->__type_constraint->can($target); |
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102 | } else { |
103 | return; |
104 | } |
105 | } |
106 | |
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107 | =head2 DESTROY |
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108 | |
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109 | We might need it later |
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110 | |
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111 | =cut |
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112 | |
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113 | sub DESTROY { |
114 | return; |
115 | } |
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116 | |
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117 | =head2 AUTOLOAD |
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118 | |
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119 | Delegate to the decorator targe |
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120 | |
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121 | =cut |
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122 | |
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123 | sub AUTOLOAD { |
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124 | my ($self, @args) = @_; |
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125 | my ($method) = (our $AUTOLOAD =~ /([^:]+)$/); |
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126 | if($self->__type_constraint->can($method)) { |
127 | return $self->__type_constraint->$method(@args); |
128 | } else { |
129 | croak "Method '$method' is not supported"; |
130 | } |
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131 | } |
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132 | |
133 | =head1 AUTHOR AND COPYRIGHT |
134 | |
135 | John Napiorkowski (jnapiorkowski) <jjnapiork@cpan.org> |
136 | |
137 | =head1 LICENSE |
138 | |
139 | This program is free software; you can redistribute it and/or modify |
140 | it under the same terms as perl itself. |
141 | |
142 | =cut |
143 | |
144 | 1; |