annotate Lib/IMPL/DOM/Transform/QueryToDOM.pm @ 322:cca158327c47

added OutOfRangeException
author cin
date Tue, 21 May 2013 10:04:11 +0400
parents c9c2ec29793f
children b56b1ec33b59
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 package IMPL::DOM::Transform::QueryToDOM;
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2 use strict;
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3
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4 use IMPL::Const qw(:prop);
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5 use IMPL::declare {
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6 base => [
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7 'IMPL::DOM::Transform::ObjectToDOM' => '@_'
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8 ],
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9 props => [
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10 prefix => PROP_RO,
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11 delimiter => PROP_RO
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12 ]
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13 };
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14
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15 sub CTOR {
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16 my ($this) = @_;
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17
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18 $this->templates->{'CGI'} = 'TransformCGI';
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19
238
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20 $this->delimiter('[.]');
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21 $this->prefix('');
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22 }
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23
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24 # inflate simple properties
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25 sub TransformPlain {
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26 my ($this,$data) = @_;
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27
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28 $this->currentNode->nodeProperty( rawValue => $data );
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29 $this->currentNode->nodeValue( $this->inflateNodeValue($data) );
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30 return $this->currentNode;
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31 }
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32
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33 # do not store complex data as node values
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34 sub StoreObject {
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35 my ($this,$node,$data) = @_;
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36
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37 return $node;
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38 }
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39
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40 #TODO: support a.b[0][1].c[1]
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41
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42 sub TransformCGI {
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43 my ($this,$query) = @_;
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44
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45 my $data={};
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46
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47 my $prefix = $this->prefix;
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48 my $delim = $this->delimiter;
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49
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50 foreach my $param (grep index($_,$prefix) >= 0 , $query->param()) {
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51
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52 my @value = grep length($_), $query->param($param) or next;
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53
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54 my @parts = split /$delim/,$param;
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55
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56 my $node = $data;
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57 while ( my $part = shift @parts ) {
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58 if (my ($name,$index) = ($part =~ m/^(\w+)(?:\[(\d+)\])?$/) ) {
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59 if (@parts) {
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60 if(defined $index) {
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61 $node = ($node->{$name}[$index] ||= {});
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62 } else {
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63 $node = ($node->{$name} ||= {});
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64 }
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65 } else {
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66 if(defined $index) {
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67 $node->{$name}[$index] = (@value == 1 ? $value[0] : \@value);
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68 } else {
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69 $node->{$name} = (@value == 1 ? $value[0] : \@value);
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70 }
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71 }
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72 }
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73 }
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74 }
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75
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76 return $this->Transform($data);
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77 }
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78
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79 1;
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80
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81 __END__
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82
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83 =pod
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84
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85 =head1 NAME
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86
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87 C<IMPL::DOM::Transform::QueryToDOM> - преобразование CGI запроса в DOM документ.
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88
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89 =head1 SYNOPSIS
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90
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91 =begin code
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92
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93 use CGI();
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94 use IMPL::require {
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95 Schema => 'IMPL::DOM::Schema',
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96 Config => 'IMPL::Config',
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97 QueryToDOM => 'IMPL::DOM::Transform::QueryToDOM'
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98 }
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99
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100 my $q = CGI->new();
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101
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102 my $schema = Schema->LoadSchema(Config->AppBase('schemas','person.xml'));
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103 my $transorm = QueryToDOM->new('edit', $schema);
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104
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105 my $form = $transform->Transform($q);
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106
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107 my @errors;
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108
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109 push @errors, $transform->buildErrors;
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110 push @errors, $schema->Validate($doc);
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111
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112
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113 =end code
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114
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115 =head1 DESCRIPTION
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116
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117 Наследует C<IMPL::DOM::Transform::ObjectToDOM>. Добавляет метод
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118 C<TransformCGI> который применятеся к объектам типа C<CGI> (и производных).
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119
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120 Запрос C<CGI> сначала приводится к хешу, затем полученный хеш преобразуется
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121 в DOM документ при помощи вызова метода C<Transform>.
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122
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123 Для этого выбираются параметры запроса, затем, имя каждого параметра
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124 рассматривается в виде пути к свойству, создается структура из хешей и массивов
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125 в которую по указанному пути кладется значение.
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126
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127 Если параметр имеет несколько значений, значит свойство является массивом.
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128
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129 Также изменено поведение некоторых методов преобразования.
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130
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131 =over
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132
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133 =item * C<TransformPlain($value)>
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134
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135 Преобразование для простого значения свойства. Посокльку в запросе передаются
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136 строковые значения, а схема документа может предполпгать другие типы, при
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137 преобразовании значения параметра из запроса к значению узла используется
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138 метод C<< $this->inflateNodeValue($value) >>, также помимо значения
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139 C<< $this->currentNode->nodeValue >> задается атрибут
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140 C<< $this->currentNode->nodeProperty( rawValue => $value) >>, для того, чтобы
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141 была возможность получить оригинальное значение параметра запроса (например,
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142 в случае когда его формат был не верным и C<nodeValue> будет C<undef>).
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143
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144 =item * C<StoreObject($node,$object)>
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145
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146 Данный метод вызывается если текущий узел (переданный в параметре C<$node>)
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147 предполагает простое значение, однако в запросе для него было передано сложное
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148 содержимое. Данная реализация просто игнорирует переданный объект C<$object>
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149 и возвращает C<$node> без изменений.
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150
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151 =back
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152
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153 =head1 MEMBERS
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154
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155 =head2 C<[get]delimiter>
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156
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157 REGEX. Разделитель свойств в имени параметра, по-умолчанию C<'[.]'>
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158
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159 =head2 C<[get]prefix>
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160
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161 Строка, префикс имен параметров, которые участвуют в формировании документа.
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162 По-умолчанию пусто.
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163
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164 =cut