annotate Lib/IMPL/DOM/XMLReader.pm @ 368:010ceafd0c5a

form metadata + tests
author cin
date Wed, 04 Dec 2013 17:31:53 +0400
parents 4ddb27ff4a0b
children 4edd36025051
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1 package IMPL::DOM::XMLReader;
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2 use strict;
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3 use warnings;
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4
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5 use parent qw(IMPL::Object IMPL::Object::Autofill);
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6
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7 use IMPL::Class::Property;
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8 use XML::Parser;
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9
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10 use IMPL::require {
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11 Schema => 'IMPL::DOM::Schema', # IMPL::DOM::Schema references IMPL::DOM::XML::Reader
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12 Builder => 'IMPL::DOM::Navigator::Builder',
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13 SimpleBuilder => 'IMPL::DOM::Navigator::SimpleBuilder'
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14 };
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15
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16 __PACKAGE__->PassThroughArgs;
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17
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18 BEGIN {
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19 public _direct property Navigator => prop_get | owner_set;
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20 public _direct property SkipWhitespace => prop_get | owner_set;
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21 private _direct property _current => prop_all;
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22 private _direct property _text => prop_all;
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23 private _direct property _textHistory => prop_all;
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24 }
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25
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26 sub Parse {
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27 my ($this,$in) = @_;
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28
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29 my $parser = new XML::Parser(
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30 Handlers => {
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31 Start => sub {shift; goto &OnStart($this,@_)},
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32 End => sub {shift; goto &OnEnd($this,@_)},
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33 Char => sub {shift; goto &OnChar($this,@_)}
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34 }
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35 );
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36
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37 $parser->parse($in);
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38 }
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39
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40 sub ParseFile {
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41 my ($this,$in) = @_;
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42
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43 my $parser = new XML::Parser(
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44 Handlers => {
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45 Start => sub {shift; unshift @_, $this; goto &_OnBegin;},
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46 End => sub {shift; unshift @_, $this; goto &_OnEnd;},
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47 Char => sub {shift; unshift @_, $this; goto &_OnChar;}
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48 }
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49 );
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50
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51 $parser->parsefile($in);
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52 }
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53
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54 sub _OnBegin {
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55 my ($this,$element,%attrs) = @_;
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56
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57 push @{$this->{$_textHistory}},$this->{$_text};
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58 $this->{$_text} = "";
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59 $this->{$_current} = $this->Navigator->NavigateCreate($element,%attrs);
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60 }
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61
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62 sub _OnEnd {
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63 my ($this,$element) = @_;
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64 $this->{$_current}->nodeValue($this->Navigator->inflateValue( $this->{$_text} ) ) if length $this->{$_text} and (not $this->{$SkipWhitespace} or $this->{$_text} =~ /\S/);
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65 $this->{$_text} = pop @{$this->{$_textHistory}};
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66 $this->{$_current} = $this->Navigator->Back;
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67 }
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69 sub _OnChar {
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70 my ($this,$val) = @_;
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71 $this->{$_text} .= $val;
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72 }
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73
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74 sub LoadDocument {
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75 my ($self,$file,$schema) = @_;
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76
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77 my $parser;
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78 if ($schema) {
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79 $schema = IMPL::DOM::Schema->LoadSchema($schema) if not ref $schema;
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80 $parser = $self->new(
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81 Navigator => IMPL::DOM::Navigator::Builder->new(
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82 'IMPL::DOM::Document',
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83 $schema
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84 )
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85 );
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86 } else {
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87 $parser = $self->new(
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88 Navigator => IMPL::DOM::Navigator::SimpleBuilder->new()
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89 );
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90 }
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91
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92 $parser->ParseFile($file);
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93 my $doc = $parser->Navigator->Document;
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94 my @errors;
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95 if ($schema) {
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96 @errors = $parser->Navigator->BuildErrors;
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97 push @errors, $schema->Validate($doc);
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98 }
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99
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100 if (wantarray) {
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101 return $doc,\@errors;
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102 } else {
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103 die new IMPL::Exception("Loaded document doesn't match the schema", @errors) if @errors;
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104 return $doc;
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105 }
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106 }
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107
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108 1;
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109
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110 __END__
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111
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112 =pod
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113
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114 =head1 SYNOPSIS
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115
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116 my $reader = new IMPL::DOM::XMLReader(Navigator => $DomBuilder);
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117 my $obj = $reader->parsefile("data.xml");
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118
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119 =head1 DESCRIPTION
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120
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121 Простой класс, использующий навигатор для постороения документа. В зависимости от
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122 используемого навигатора может быть получен различный результат.
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123
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124 Навигатор должен поодерживать методы C<NavigateCreate> и C<Back>
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125
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126 =head1 METHODS
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127
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128 =over
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129
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130 =item C<CTOR(Naviagtor => $builder)>
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131
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132 Создает новый экземпляр парсера, с указанным навигатором для построения документа
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133
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134 =item C<$obj->Parse($in)>
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135
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136 Строит документ. На вход получает либо xml строку, либо HANDLE.
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137
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138 =item C<$obj->ParseFile($fileName)>
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139
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140 Строит документ из файла с именем C<$fileName>.
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141
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142 =back
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143
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144 =cut