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comparison Lib/IMPL/Class/Property/Direct.pm @ 0:03e58a454b20

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Создан репозитарий
author Sergey
date Tue, 14 Jul 2009 12:54:37 +0400
parents
children 16ada169ca75
comparison
equal deleted inserted replaced
-1:000000000000 0:03e58a454b20
1 package IMPL::Class::Property::Direct;
2 use strict;
3
4 use base qw(IMPL::Object::Accessor Exporter);
5 our @EXPORT = qw(_direct);
6
7 use IMPL::Class::Property;
8 require IMPL::Exception;
9
10 __PACKAGE__->mk_accessors qw(ExportField);
11
12 sub _direct($) {
13 my ($prop_info) = @_;
14 $prop_info->Implementor( IMPL::Class::Property::Direct->new({ExportField => 1}) );
15 return $prop_info;
16 }
17
18 my $access_private = "die new IMPL::Exception('Can\\'t access the private member',\$name,\$class,scalar caller) unless caller eq \$class;";
19 my $access_protected = "die new IMPL::Exception('Can\\'t access the protected member',\$name,\$class,scalar caller) unless caller eq \$class;";
20
21 my $accessor_get_no = 'die new IMPL::Exception(\'The property is write only\',$name,$class) unless $get;';
22 my $accessor_set_no = 'die new IMPL::Exception(\'The property is read only\',$name,$class) unless $set;';
23 my $accessor_set = 'return( $this->{$field} = @_ == 1 ? $_[0] : [@_] );';
24 my $accessor_get = 'return( $this->{$field} );';
25 my $list_accessor_set = 'return( @{ ($this->{$field} = ( (@_ == 1 and ref $_[0] eq \'ARRAY\') ? $_[0] : [@_] ) || [] ) } );';
26 my $list_accessor_get = 'return( @{ $this->{$field} || [] } );';
27 my $custom_accessor_get = 'unshift @_, $this and goto &$get;';
28 my $custom_accessor_set = 'unshift @_, $this and goto &$set;';
29
30 my %accessor_cache;
31 sub mk_acessor {
32 my ($virtual,$access,$class,$name,$mutators,$field) = @_;
33
34 my ($get,$set) = ref $mutators ? ( $mutators->{get}, $mutators->{set}) : ($mutators & prop_get, $mutators & prop_set);
35 my $key = join '',$virtual,$access,$get ? 1 : 0,$set ? 1 : 0, (ref $mutators ? 'c' : ($mutators & prop_list() ? 'l' : 's'));
36 my $factory = $accessor_cache{$key};
37 if (not $factory) {
38 my $code =
39 <<BEGIN;
40 sub {
41 my (\$class,\$name,\$set,\$get,\$field) = \@_;
42 my \$accessor;
43 \$accessor = sub {
44 my \$this = shift;
45 BEGIN
46 $code .= <<VCALL if $virtual;
47 my \$method = \$this->can(\$name);
48 return \$this->\$method(\@_) unless \$method == \$accessor or caller->isa(\$class);
49 VCALL
50 $code .= "$access_private\n" if $access == IMPL::Class::Member::MOD_PRIVATE;
51 $code .= "$access_protected\n" if $access == IMPL::Class::Member::MOD_PROTECTED;
52 my ($codeGet,$codeSet);
53 if (ref $mutators) {
54 $codeGet = $get ? $custom_accessor_get : $accessor_get_no;
55 $codeSet = $set ? $custom_accessor_set : $accessor_set_no;
56 } else {
57 if ($mutators & prop_list) {
58 $codeGet = $get ? $list_accessor_get : $accessor_get_no;
59 $codeSet = $set ? $list_accessor_set : $accessor_set_no;
60 } else {
61 $codeGet = $get ? $accessor_get : $accessor_get_no;
62 $codeSet = $set ? $accessor_set : $accessor_set_no;
63 }
64 }
65 $code .=
66 <<END;
67 if (\@_) {
68 $codeSet
69 } else {
70 $codeGet
71 }
72 }
73 }
74 END
75 $factory = eval $code or die new IMPL::Exception('Failed to generate the accessor',$@);
76 $accessor_cache{$key} = $factory;
77 }
78 return $factory->($class,$name,$set,$get, $field);
79 }
80
81 sub Make {
82 my ($self,$propInfo) = @_;
83
84 my $isExportField = ref $self ? ($self->ExportField || 0) : 0;
85 my ($class,$name,$virt,$access,$mutators) = $propInfo->get qw(Class Name Virtual Access Mutators);
86 (my $field = "${class}_$name") =~ s/::/_/g;
87
88 my $propGlob = $class.'::'.$name;
89
90 no strict 'refs';
91 *$propGlob = mk_acessor($virt,$access,$class,$name,$mutators,$field);
92 *$propGlob = \$field if $isExportField;
93
94 if (ref $mutators) {
95 $propInfo->canGet( $mutators->{get} ? 1 : 0);
96 $propInfo->canSet( $mutators->{set} ? 1 : 0);
97 } else {
98 $propInfo->canGet( ($mutators & prop_get) ? 1 : 0);
99 $propInfo->canSet( ($mutators & prop_set) ? 1 : 0);
100 }
101 }
102
103 sub FieldName {
104 my ($self,$propInfo) = @_;
105
106 my ($class,$name) = $propInfo->get qw(Class Name);
107 (my $field = "${class}_$name") =~ s/::/_/g;
108 return $field;
109 }
110
111 1;