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annotate Lib/IMPL/declare.pm @ 232:5c82eec23bb6

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Fixed degradations due refactoring
author sergey
date Tue, 09 Oct 2012 20:12:47 +0400
parents 6d8092d8ce1b
children 9f394b27dccf
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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 use Carp qw(carp);
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6 use IMPL::Class::PropertyInfo();
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7 use IMPL::Const qw(:access);
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8
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9 sub import {
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10 my ( $self, $args ) = @_;
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11
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12 return unless $args;
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13
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14 die "A hash reference is required" unless ref $args eq 'HASH';
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15
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16 no strict 'refs';
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17
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18 my $caller = caller;
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19
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20 my $aliases = $args->{require} || {};
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21
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22 while ( my ( $alias, $class ) = each %$aliases ) {
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23 my $c = _require($class);
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24
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25 *{"${caller}::$alias"} = set_prototype(
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26 sub {
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27 $c;
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28 },
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29 ''
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30 );
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31 }
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32
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33 my $base = $args->{base} || {};
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34
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35 my %ctor;
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36 my @isa;
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37
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38 if ( ref $base eq 'ARRAY' ) {
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39 carp "Odd elements number in require"
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40 unless scalar(@$base) % 2 == 0;
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41 while ( my ( $class, $mapper ) = splice @$base, 0, 2 ) {
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42 $class = $aliases->{$class} || _require($class);
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43
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44 push @isa, $class;
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45 $ctor{$class} = $mapper;
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46 }
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47 }
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48 elsif ( ref $base eq 'HASH' ) {
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49 while ( my ( $class, $mapper ) = each %$base ) {
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50 $class = $aliases->{$class} || _require($class);
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51
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52 push @isa, $class;
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53 $ctor{$class} = $mapper;
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54 }
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55 }
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56
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57 *{"${caller}::CTOR"} = \%ctor;
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58 *{"${caller}::ISA"} = \@isa;
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59
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60 my $props = $args->{props} || [];
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61
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62 if ( $props eq 'HASH' ) {
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63 $props = [%$props];
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64 }
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65
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66 die "A hash or an array reference is required in the properties list"
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67 unless ref $props eq 'ARRAY';
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68
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69 carp "Odd elements number in properties declaration of $caller"
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70 unless scalar(@$props) % 2 == 0;
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71
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72 if (@$props) {
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73 for ( my $i = 0 ; $i < @$props - 1 ; $i = $i + 2 ) {
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74 my ( $prop, $spec ) = @{$props}[ $i, $i + 1 ];
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75
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76 my $propInfo = IMPL::Class::PropertyInfo->new(
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77 {
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78 Name => $prop,
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79 Mutators => $spec,
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80 Class => $caller,
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81 Access => $prop =~ /^_/
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82 ? ACCESS_PRIVATE
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83 : ACCESS_PUBLIC
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84 }
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85 );
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86 $propInfo->Implement();
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87 }
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88 }
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89 }
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90
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91 sub _require {
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92 my ($class) = @_;
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93
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94 if ( not $class =~ s/^-// ) {
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95 ( my $file = $class ) =~ s/::|'/\//g;
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96 require "$file.pm";
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97 }
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98 $class;
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99 }
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100
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101 1;
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102
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103 __END__
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104
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105 =pod
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106
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107 =head1 NAME
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108
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109 C<IMPL::declare> - описывает класс
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110
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111 =head1 SYNOPSIS
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112
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113 =begin code
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114
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115 package My::Bar;
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116
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117 use IMPL::declare {
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118 require => {
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119 TFoo => 'My::Foo',
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120 TBox => 'My::Box'
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121 },
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122 base => {
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123 TFoo => '@_',
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124 'IMPL::Object' => undef,
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125 }
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126 }
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127
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128 sub CreateBox {
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129 my ($this) = @_;
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130 return TBox->new($this);
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131 }
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132
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133 =end code
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134
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135 Специальная ситрока C<@_> означает передачу параметров конструктора текущего класса конструктору
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136 базового класса без изменений.
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137
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138 =head1 DESCRIPTION
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139
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140 Описывает текущий пакет(модуль) как класс. В качестве параметра получает ссылку на хеш,
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141 в которой храняться метаданные для объявления класса.
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142
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143 =head1 METADATA
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144
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145 =head2 C<require>
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146
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147 Содержит ссылку на хеш с синонимами модулей, которые будут доступны в текушем модуле,
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148 аналогично использованию C<IMPL::require>. Однако, если модуль не требует загрузки при
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149 помощи C<require> нужно использовать префикс C<'-'> в его имени
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150
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151 =begin code
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152
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153 {
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154 require => {
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155 TObject => 'IMPL::Object', # will be loaded with require
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156 TFoo => '-My:App::Data::Foo' # will not use 'require' to load module
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157 }
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158 }
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159
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160 =end code
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161
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162 =head2 C<base>
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163
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164 Обисывает базове классы для текущего класса. Если данный параметр - ссылка массив, то
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165 этот массив будет превращен в массив C<@ISA>. Если данный параметр - ссылка на хеш, то
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166 его ключи опичавют список базовых классов, а значения - преобразование параметров для
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167 вызова базовых конструкторов.
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168
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169 В качестве имен базовых классов могут быть как полные имена модулей, так и назначенные
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170 ранее псевдонимы. Использование префикса C<'-'> перед B<полным именем модуля> означает,
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171 что модуль не требуется загружать, в случае с псевдонимами, префикс C<'-'> уже был указан
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172 при их объявлении.
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173
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174 =begin code
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175
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176 {
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177 require => {
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178 TFoo => '-My:App::Data::Foo' # will not use 'require' to load module
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179 },
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180 base => {
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181 TFoo => '@_', # pass parameters unchanged
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182 'My::Base::Class' => sub { name => $_[0], data => $_[1] }, # remap parameters
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183 '-My::Extentions' => undef, # do not pass any parameters
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184 }
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185 }
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186
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187 =end code
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188
228
431db7034a88 Для синхронизации
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189 =cut