annotate Lib/IMPL/Config/Reference.pm @ 227:70ad6bc20908

sync
author sergey
date Fri, 07 Sep 2012 16:32:17 +0400
parents 2ffe6f661605
children
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1 package IMPL::Config::Reference;
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2 use strict;
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3
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4 use IMPL::Exception;
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5
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6 sub restore {
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7 my ($self,$data,$surrogate) = @_;
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8
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9 my @path;
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10
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11 my ($tagTarget,$target) = splice @$data, 0, 2;
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12
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13 die new IMPL::Exception('A traget tag must be the first tag in the reference specification') unless $tagTarget eq 'target';
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14 while(my ($method,$args) = splice @$data, 0, 2 ) {
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15 $target = $self->_InvokeMember($target,{ method => $method, args => $args});
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16 }
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17 return $target;
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18 }
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19
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20 sub _InvokeMember {
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21 my ($self,$object,$member) = @_;
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22
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23 my $method = $member->{method};
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24 return
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25 ref $object eq 'HASH' ?
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26 $object->{$method}
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27 :
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28 $object->$method(
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29 exists $member->{args} ?
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30 _as_list($member->{args})
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31 :
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32 ()
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33 )
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34 ;
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35 }
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36
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37 sub _as_list {
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38 ref $_[0] ?
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39 (ref $_[0] eq 'HASH' ?
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40 %{$_[0]}
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41 :
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42 (ref $_[0] eq 'ARRAY'?
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43 @{$_[0]}
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44 :
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45 $_[0]
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46 )
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47 )
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48 :
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49 ($_[0]);
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50 }
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51
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52 1;
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53
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54 __END__
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55
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56 =pod
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57
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58 =head1 NAME
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59
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60 C<IMPL::Config::Reference> - ссылка на внешний объект, вычисляемый на этапе десериализации данных.
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61
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62 =head1 SYNOPSIS
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63
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64 =begin code xml
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65
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66 <Application>
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67 <processingStack type="IMPL::Config::Reference">
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68 <target>IMPL::Config</target>
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69 <LoadXMLFile>stdprocessing.xml</LoadXMLFile>
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70 </processingStack>
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71 </Application>
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72
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73 =end code xml
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74
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75 =head1 DESCRIPTION
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76
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77 Позволяет на указвать ссылки на вычисляемые объекты, например, загружаемые из файлов. Ссылки такого рода
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78 будут вычислены на этапе десериализации еще до того, как будет создан объект верхнего уровня, поэтому
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79 следует избегать таких ссылок на сам (его свойства и методы) десериализуемый объект.
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80
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81 =head1 MEMBERS
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82
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83 =head2 C<restore($class,$data,$surrogate)>
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84
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85 Использует данные переданные в параметре дата C<$data> для вычисления свойства. Данный метод - стандартный
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86 метод для десериализации объекта, а параметр C<$data> содержит пары значений C<(имя_узла,значение_узла)>,
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87 первая пара обязательно является узлом C<target>, а его значение - целевой объект, который будет
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88 использован для вычисления конечного значения.
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89
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90 =back
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91
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92 =cut