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1b45ecc4 |
1 | package MooseX::AttributeHelpers::MethodProvider::Collection::ImmutableHash; |
2 | use MooseX::AttributeHelpers::MethodProvider; |
3 | |
4 | our $VERSION = '0.03'; |
5 | our $AUTHORITY = 'cpan:STEVAN'; |
6 | |
7 | add_method_provider 'Collection::ImmutableHash' => ( |
8 | type => 'HashRef', |
9 | provides => { |
10 | exists => sub { |
11 | my ($attr, $reader, $writer) = @_; |
12 | return sub { CORE::exists $reader->($_[0])->{$_[1]} }; |
13 | }, |
14 | |
15 | get => sub { |
16 | my ($attr, $reader, $writer) = @_; |
17 | return sub { |
18 | my ($self, @keys) = @_; |
19 | @{ $reader->($self) }{@keys} |
20 | }; |
21 | }, |
22 | |
23 | keys => sub { |
24 | my ($attr, $reader, $writer) = @_; |
25 | return sub { CORE::keys %{$reader->($_[0])} }; |
26 | }, |
27 | |
28 | values => sub { |
29 | my ($attr, $reader, $writer) = @_; |
30 | return sub { CORE::values %{$reader->($_[0])} }; |
31 | }, |
32 | |
33 | kv => sub { |
34 | my ($attr, $reader, $writer) = @_; |
35 | return sub { |
36 | my $h = $reader->($_[0]); |
37 | map { |
38 | [ $_, $h->{$_} ] |
39 | } CORE::keys %{$h} |
40 | }; |
41 | }, |
42 | |
43 | count => sub { |
44 | my ($attr, $reader, $writer) = @_; |
45 | return sub { scalar CORE::keys %{$reader->($_[0])} }; |
46 | }, |
47 | |
48 | # Deprecated. Does the opposite of what it claims to. |
49 | empty => sub { |
50 | my ($attr, $reader, $writer) = @_; |
51 | return sub { scalar CORE::keys %{$reader->($_[0])} ? 1 : 0 }; |
52 | }, |
53 | |
54 | is_empty => sub { |
55 | my ($attr, $reader, $writer) = @_; |
56 | return sub { CORE::keys %{$reader->($_[0])} == 0 }; |
57 | }, |
58 | |
59 | has_items => sub { |
60 | my ($attr, $reader, $writer) = @_; |
61 | return sub { CORE::keys %{$reader->($_[0])} > 0 }; |
62 | }, |
63 | }, |
64 | ); |
65 | |
66 | 1; |
67 | |
68 | __END__ |
69 | |
70 | =pod |
71 | |
72 | =head1 NAME |
73 | |
74 | MooseX::AttributeHelpers::MethodProvider::ImmutableHash |
75 | |
76 | =head1 DESCRIPTION |
77 | |
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78 | This module provides the method factories for |
1b45ecc4 |
79 | L<MooseX::AttributeHelpers::Collection::ImmutableHash>. |
80 | |
81 | =head1 PROVIDED METHODS |
82 | |
83 | =over 4 |
84 | |
85 | =item B<count> |
86 | |
87 | Returns the number of items in the hash. |
88 | |
89 | =item B<empty> |
90 | |
91 | DEPRECATED. This was a misleading name for what it does (returns a boolean |
92 | indicating whether the hash is NOT empty), but we're keeping it for backwards |
93 | compatibility. Do not use it in new code. Use is_empty or has_items instead, |
94 | depending on what you meant. |
95 | |
96 | =item B<is_empty> |
97 | |
98 | Returns a boolean which is true if and only if the hash has no items in it. |
99 | |
100 | =item B<has_items> |
101 | |
102 | Returns a boolean which is true if and only if the hash has at least one item. |
103 | |
104 | =item B<exists> |
105 | |
106 | L<perlfunc/exists> |
107 | |
108 | =item B<get(@keys)> |
109 | |
110 | Gets the values specified by @keys from the hash. |
111 | |
112 | =item B<keys> |
113 | |
114 | L<perlfunc/keys> |
115 | |
116 | =item B<values> |
117 | |
118 | L<perlfunc/values> |
119 | |
120 | =item B<kv> |
121 | |
122 | Returns a list of arrayrefs, each of which is a key => value pair mapping. |
123 | |
124 | =back |
125 | |
126 | =head1 BUGS |
127 | |
128 | All complex software has bugs lurking in it, and this module is no |
129 | exception. If you find a bug please either email me, or add the bug |
130 | to cpan-RT. |
131 | |
132 | =head1 AUTHOR |
133 | |
134 | Stevan Little E<lt>stevan@iinteractive.comE<gt> |
135 | |
136 | =head1 COPYRIGHT AND LICENSE |
137 | |
138 | Copyright 2007-2008 by Infinity Interactive, Inc. |
139 | |
140 | L<http://www.iinteractive.com> |
141 | |
142 | This library is free software; you can redistribute it and/or modify |
143 | it under the same terms as Perl itself. |
144 | |
145 | =cut |
146 | |