Mercurial > pub > Impl
annotate Lib/IMPL/declare.pm @ 208:3d433a977e3b
corrected RestController for empty PAT_INFO
corrected charset for ErrorHandler
author | sergey |
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date | Fri, 18 May 2012 18:43:00 +0400 |
parents | 2ffe6f661605 |
children | a8db61d0ed33 |
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1 package IMPL::declare; |
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2 use strict; |
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3 |
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4 use Scalar::Util qw(set_prototype); |
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5 |
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6 sub import { |
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7 my ($self,$args) = @_; |
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8 |
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9 return unless $args; |
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10 |
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11 die "A hash reference is required" unless ref $args eq 'HASH'; |
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12 |
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13 no strict 'refs'; |
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14 |
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15 my $caller = caller; |
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16 |
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17 my $aliases = $args->{require} || {}; |
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18 |
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19 while( my ($alias, $class) = each %$aliases ) { |
198 | 20 my $c = _require($class); |
197
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21 |
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22 *{"${caller}::$alias"} = set_prototype(sub { |
198 | 23 $c |
197
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24 }, ''); |
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25 } |
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26 |
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27 my $base = $args->{base} || {}; |
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28 |
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29 my %ctor; |
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30 my @isa; |
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31 |
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32 if (ref $base eq 'ARRAY') { |
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33 @isa = map _require($_), @$base if @$base; |
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34 } elsif (ref $base eq 'HASH' ) { |
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35 while ( my ($class,$mapper) = each %$base ) { |
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36 $class = $aliases->{$class} || _require($class); |
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37 |
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38 push @isa,$class; |
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39 $ctor{$class} = $mapper; |
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40 } |
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41 } |
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42 |
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43 *{"${caller}::CTOR"} = \%ctor; |
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44 *{"${caller}::ISA"} = \@isa; |
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45 } |
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46 |
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47 sub _require { |
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48 my ($class) = @_; |
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49 |
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50 if (not $class =~ s/^-//) { |
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51 (my $file = $class) =~ s/::|'/\//g; |
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52 require "$file.pm"; |
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53 } |
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54 $class; |
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55 } |
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56 |
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57 |
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58 1; |
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59 |
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60 __END__ |
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61 |
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62 =pod |
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63 |
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64 =head1 NAME |
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65 |
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66 C<IMPL::declare> - описывает класс |
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67 |
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68 =head1 SYNOPSIS |
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69 |
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70 =begin code |
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71 |
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72 package My::Bar; |
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73 |
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74 use IMPL::declare { |
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75 require => { |
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76 TFoo => 'My::Foo', |
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77 TBox => 'My::Box' |
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78 }, |
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79 base => { |
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80 TFoo => '@_', |
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81 'IMPL::Object' => undef, |
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82 } |
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83 } |
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84 |
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85 sub CreateBox { |
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86 my ($this) = @_; |
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87 return TBox->new($this); |
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88 } |
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89 |
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90 =end code |
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91 |
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92 Специальная ситрока C<@_> означает передачу параметров конструктора текущего класса конструктору |
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93 базового класса без изменений. |
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94 |
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95 =head1 DESCRIPTION |
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96 |
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97 Описывает текущий пакет(модуль) как класс. В качестве параметра получает ссылку на хеш, |
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98 в которой храняться метаданные для объявления класса. |
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99 |
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100 =head1 METADATA |
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101 |
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102 =head2 C<require> |
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103 |
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104 Содержит ссылку на хеш с синонимами модулей, которые будут доступны в текушем модуле, |
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105 аналогично использованию C<IMPL::require>. Однако, если модуль не требует загрузки при |
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106 помощи C<require> нужно использовать префикс C<'-'> в его имени |
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107 |
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108 =begin code |
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109 |
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110 { |
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111 require => { |
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112 TObject => 'IMPL::Object', # will be loaded with require |
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113 TFoo => '-My:App::Data::Foo' # will not use 'require' to load module |
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114 } |
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115 } |
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116 |
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117 =end code |
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118 |
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119 =head2 C<base> |
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120 |
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121 Обисывает базове классы для текущего класса. Если данный параметр - ссылка массив, то |
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122 этот массив будет превращен в массив C<@ISA>. Если данный параметр - ссылка на хеш, то |
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123 его ключи опичавют список базовых классов, а значения - преобразование параметров для |
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124 вызова базовых конструкторов. |
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125 |
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126 В качестве имен базовых классов могут быть как полные имена модулей, так и назначенные |
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127 ранее псевдонимы. Использование префикса C<'-'> перед B<полным именем модуля> означает, |
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128 что модуль не требуется загружать, в случае с псевдонимами, префикс C<'-'> уже был указан |
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129 при их объявлении. |
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130 |
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131 =begin code |
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132 |
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133 { |
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134 require => { |
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135 TFoo => '-My:App::Data::Foo' # will not use 'require' to load module |
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136 }, |
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137 base => { |
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138 TFoo => '@_', # pass parameters unchanged |
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139 'My::Base::Class' => sub { name => $_[0], data => $_[1] }, # remap parameters |
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140 '-My::Extentions' => undef, # do not pass any parameters |
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141 } |
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142 } |
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143 |
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144 =end code |
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145 |
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146 =cut |