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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
package Moose::Meta::Attribute::Native::MethodProvider::Hash;
use Moose::Role;
our $VERSION = '1.09';
$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
sub exists : method {
my ( $attr, $reader, $writer ) = @_;
return sub { CORE::exists $reader->( $_[0] )->{ $_[1] } ? 1 : 0 };
}
sub defined : method {
my ( $attr, $reader, $writer ) = @_;
return sub { CORE::defined $reader->( $_[0] )->{ $_[1] } ? 1 : 0 };
}
sub get : method {
my ( $attr, $reader, $writer ) = @_;
return sub {
if ( @_ == 2 ) {
$reader->( $_[0] )->{ $_[1] };
}
else {
my ( $self, @keys ) = @_;
@{ $reader->($self) }{@keys};
}
};
}
sub keys : method {
my ( $attr, $reader, $writer ) = @_;
return sub { CORE::keys %{ $reader->( $_[0] ) } };
}
sub values : method {
my ( $attr, $reader, $writer ) = @_;
return sub { CORE::values %{ $reader->( $_[0] ) } };
}
sub kv : method {
my ( $attr, $reader, $writer ) = @_;
return sub {
my $h = $reader->( $_[0] );
map { [ $_, $h->{$_} ] } CORE::keys %{$h};
};
}
sub elements : method {
my ( $attr, $reader, $writer ) = @_;
return sub {
my $h = $reader->( $_[0] );
map { $_, $h->{$_} } CORE::keys %{$h};
};
}
sub count : method {
my ( $attr, $reader, $writer ) = @_;
return sub { scalar CORE::keys %{ $reader->( $_[0] ) } };
}
sub is_empty : method {
my ( $attr, $reader, $writer ) = @_;
return sub { scalar CORE::keys %{ $reader->( $_[0] ) } ? 0 : 1 };
}
sub set : method {
my ( $attr, $reader, $writer ) = @_;
if (
$attr->has_type_constraint
&& $attr->type_constraint->isa(
'Moose::Meta::TypeConstraint::Parameterized')
) {
my $container_type_constraint
= $attr->type_constraint->type_parameter;
return sub {
my ( $self, @kvp ) = @_;
my ( @keys, @values );
while (@kvp) {
my ( $key, $value ) = ( shift(@kvp), shift(@kvp) );
( $container_type_constraint->check($value) )
|| confess "Value "
. ( $value || 'undef' )
. " did not pass container type constraint '$container_type_constraint'";
push @keys, $key;
push @values, $value;
}
if ( @values > 1 ) {
@{ $reader->($self) }{@keys} = @values;
}
else {
$reader->($self)->{ $keys[0] } = $values[0];
}
};
}
else {
return sub {
if ( @_ == 3 ) {
$reader->( $_[0] )->{ $_[1] } = $_[2];
}
else {
my ( $self, @kvp ) = @_;
my ( @keys, @values );
while (@kvp) {
push @keys, shift @kvp;
push @values, shift @kvp;
}
@{ $reader->( $_[0] ) }{@keys} = @values;
}
};
}
}
sub accessor : method {
my ( $attr, $reader, $writer ) = @_;
if (
$attr->has_type_constraint
&& $attr->type_constraint->isa(
'Moose::Meta::TypeConstraint::Parameterized')
) {
my $container_type_constraint
= $attr->type_constraint->type_parameter;
return sub {
my $self = shift;
if ( @_ == 1 ) { # reader
return $reader->($self)->{ $_[0] };
}
elsif ( @_ == 2 ) { # writer
( $container_type_constraint->check( $_[1] ) )
|| confess "Value "
. ( $_[1] || 'undef' )
. " did not pass container type constraint '$container_type_constraint'";
$reader->($self)->{ $_[0] } = $_[1];
}
else {
confess "One or two arguments expected, not " . @_;
}
};
}
else {
return sub {
my $self = shift;
if ( @_ == 1 ) { # reader
return $reader->($self)->{ $_[0] };
}
elsif ( @_ == 2 ) { # writer
$reader->($self)->{ $_[0] } = $_[1];
}
else {
confess "One or two arguments expected, not " . @_;
}
};
}
}
sub clear : method {
my ( $attr, $reader, $writer ) = @_;
return sub { %{ $reader->( $_[0] ) } = () };
}
sub delete : method {
my ( $attr, $reader, $writer ) = @_;
return sub {
my $hashref = $reader->(shift);
CORE::delete @{$hashref}{@_};
};
}
1;
__END__
=pod
=head1 NAME
Moose::Meta::Attribute::Native::MethodProvider::Hash - role providing method generators for Hash trait
=head1 DESCRIPTION
This is a role which provides the method generators for
L<Moose::Meta::Attribute::Native::Trait::Hash>. Please check there for
documentation on what methods are provided.
=head1 METHODS
=over 4
=item B<meta>
=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 2007-2009 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
|
