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1 | package DBIx::Class::AccessorGroup; |
2 | |
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3 | use strict; |
4 | use warnings; |
5 | |
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6 | =head1 NAME |
7 | |
8 | DBIx::Class::AccessorGroup - Lets you build groups of accessors |
9 | |
10 | =head1 SYNOPSIS |
11 | |
12 | =head1 DESCRIPTION |
13 | |
14 | This class lets you build groups of accessors that will call different |
15 | getters and setters. |
16 | |
17 | =head1 METHODS |
18 | |
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19 | =cut |
20 | |
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21 | sub mk_group_accessors { |
22 | my($self, $group, @fields) = @_; |
23 | |
24 | $self->_mk_group_accessors('make_group_accessor', $group, @fields); |
25 | } |
26 | |
27 | |
28 | { |
29 | no strict 'refs'; |
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30 | no warnings 'redefine'; |
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31 | |
32 | sub _mk_group_accessors { |
33 | my($self, $maker, $group, @fields) = @_; |
34 | my $class = ref $self || $self; |
35 | |
36 | # So we don't have to do lots of lookups inside the loop. |
37 | $maker = $self->can($maker) unless ref $maker; |
38 | |
39 | foreach my $field (@fields) { |
40 | if( $field eq 'DESTROY' ) { |
41 | require Carp; |
42 | &Carp::carp("Having a data accessor named DESTROY in ". |
43 | "'$class' is unwise."); |
44 | } |
45 | |
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46 | my $name = $field; |
47 | |
48 | ($name, $field) = @$field if ref $field; |
49 | |
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50 | my $accessor = $self->$maker($group, $field); |
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51 | my $alias = "_${name}_accessor"; |
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52 | |
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53 | #warn "$class $group $field $alias"; |
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54 | |
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55 | *{$class."\:\:$name"} = $accessor; |
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56 | #unless defined &{$class."\:\:$field"} |
57 | |
58 | *{$class."\:\:$alias"} = $accessor; |
59 | #unless defined &{$class."\:\:$alias"} |
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60 | } |
61 | } |
62 | } |
63 | |
64 | sub mk_group_ro_accessors { |
65 | my($self, $group, @fields) = @_; |
66 | |
67 | $self->_mk_group_accessors('make_group_ro_accessor', $group, @fields); |
68 | } |
69 | |
70 | sub mk_group_wo_accessors { |
71 | my($self, $group, @fields) = @_; |
72 | |
73 | $self->_mk_group_accessors('make_group_wo_accessor', $group, @fields); |
74 | } |
75 | |
76 | sub make_group_accessor { |
77 | my ($class, $group, $field) = @_; |
78 | |
79 | my $set = "set_$group"; |
80 | my $get = "get_$group"; |
81 | |
82 | # Build a closure around $field. |
83 | return sub { |
84 | my $self = shift; |
85 | |
86 | if(@_) { |
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87 | return $self->$set($field, @_); |
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88 | } |
89 | else { |
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90 | return $self->$get($field); |
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91 | } |
92 | }; |
93 | } |
94 | |
95 | sub make_group_ro_accessor { |
96 | my($class, $group, $field) = @_; |
97 | |
98 | my $get = "get_$group"; |
99 | |
100 | return sub { |
101 | my $self = shift; |
102 | |
103 | if(@_) { |
104 | my $caller = caller; |
105 | require Carp; |
106 | Carp::croak("'$caller' cannot alter the value of '$field' on ". |
107 | "objects of class '$class'"); |
108 | } |
109 | else { |
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110 | return $self->$get($field); |
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111 | } |
112 | }; |
113 | } |
114 | |
115 | sub make_group_wo_accessor { |
116 | my($class, $group, $field) = @_; |
117 | |
118 | my $set = "set_$group"; |
119 | |
120 | return sub { |
121 | my $self = shift; |
122 | |
123 | unless (@_) { |
124 | my $caller = caller; |
125 | require Carp; |
126 | Carp::croak("'$caller' cannot access the value of '$field' on ". |
127 | "objects of class '$class'"); |
128 | } |
129 | else { |
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130 | return $self->$set($field, @_); |
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131 | } |
132 | }; |
133 | } |
134 | |
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135 | sub get_simple { |
136 | my ($self, $get) = @_; |
137 | return $self->{$get}; |
138 | } |
139 | |
140 | sub set_simple { |
141 | my ($self, $set, $val) = @_; |
142 | return $self->{$set} = $val; |
143 | } |
144 | |
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145 | 1; |
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146 | |
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147 | =head1 AUTHORS |
148 | |
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149 | Matt S. Trout <mst@shadowcatsystems.co.uk> |
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150 | |
151 | =head1 LICENSE |
152 | |
153 | You may distribute this code under the same terms as Perl itself. |
154 | |
155 | =cut |
156 | |