annotate Lib/IMPL/DOM/XMLReader.pm @ 119:8114aaa7feba

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author wizard
date Mon, 07 Jun 2010 17:43:15 +0400
parents 7b14e0122b79
children 1e7f03414b65
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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 base qw(IMPL::Object IMPL::Object::Autofill);
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6 use IMPL::Class::Property;
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7 use IMPL::Class::Property::Direct;
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8 use XML::Parser;
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9 require IMPL::DOM::Schema;
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10 require IMPL::DOM::Navigator::Builder;
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11 require IMPL::DOM::Navigator::SimpleBuilder;
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12
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13 __PACKAGE__->PassThroughArgs;
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14
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15 BEGIN {
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16 public _direct property Navigator => prop_get | owner_set;
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17 private _direct property _current => prop_all;
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18 private _direct property _text => prop_all;
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19 private _direct property _textHistory => prop_all;
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20 }
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21
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22 sub Parse {
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23 my ($this,$in) = @_;
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24
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25 my $parser = new XML::Parser(
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26 Handlers => {
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27 Start => sub {shift; goto &OnStart($this,@_)},
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28 End => sub {shift; goto &OnEnd($this,@_)},
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29 Char => sub {shift; goto &OnChar($this,@_)}
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30 }
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31 );
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32
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33 $parser->parse($in);
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34 }
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35
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36 sub ParseFile {
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37 my ($this,$in) = @_;
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38
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39 my $parser = new XML::Parser(
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40 Handlers => {
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41 Start => sub {shift; unshift @_, $this; goto &_OnBegin;},
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42 End => sub {shift; unshift @_, $this; goto &_OnEnd;},
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43 Char => sub {shift; unshift @_, $this; goto &_OnChar;}
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44 }
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45 );
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46
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47 $parser->parsefile($in);
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48 }
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49
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50 sub _OnBegin {
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51 my ($this,$element,%attrs) = @_;
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52
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53 push @{$this->{$_textHistory}},$this->{$_text};
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54 $this->{$_text} = "";
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55 $this->{$_current} = $this->Navigator->NavigateCreate($element,%attrs);
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56 }
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57
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58 sub _OnEnd {
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59 my ($this,$element) = @_;
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60 $this->{$_current}->nodeValue($this->Navigator->inflateValue( $this->{$_text} ) ) if length $this->{$_text};
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61 $this->{$_text} = pop @{$this->{$_textHistory}};
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62 $this->{$_current} = $this->Navigator->Back;
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63 }
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64
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65 sub _OnChar {
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66 my ($this,$val) = @_;
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67 $this->{$_text} .= $val;
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68 }
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70 sub LoadDocument {
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71 my ($self,$file,$schema) = @_;
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72
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73 my $parser;
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74 if ($schema) {
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75 $schema = IMPL::DOM::Schema->LoadSchema($schema) if not ref $schema;
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76 $parser = $self->new(
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77 Navigator => IMPL::DOM::Navigator::Builder->new(
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78 'IMPL::DOM::Document',
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79 $schema
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80 )
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81 );
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82 } else {
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83 $parser = $self->new(
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84 Navigator => IMPL::DOM::Navigator::SimpleBuilder->new()
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85 );
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86 }
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87
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88 $parser->ParseFile($file);
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89 my $doc = $parser->Navigator->Document;
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90 if ($schema) {
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91 my @errors = $parser->Navigator->BuildErrors;
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92 push @errors, $schema->Validate($doc);
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93 die new IMPL::Exception("Loaded document doesn't match the schema", @errors) if @errors;
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94 }
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95 return $doc;
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96 }
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97
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98 1;
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99
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100 __END__
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101
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102 =pod
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103
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104 =head1 SYNOPSIS
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105
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106 my $reader = new IMPL::DOM::XMLReader(Navigator => $DomBuilder);
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107 my $obj = $reader->parsefile("data.xml");
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108
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109 =head1 DESCRIPTION
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110
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111 Простой класс, использующий навигатор для постороения документа. В зависимости от
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112 используемого навигатора может быть получен различный результат.
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113
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114 Навигатор должен поодерживать методы C<NavigateCreate> и C<Back>
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115
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116 =head1 METHODS
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117
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118 =over
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119
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120 =item C<CTOR(Naviagtor => $builder)>
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121
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122 Создает новый экземпляр парсера, с указанным навигатором для построения документа
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123
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124 =item C<$obj->Parse($in)>
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125
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126 Строит документ. На вход получает либо xml строку, либо HANDLE.
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127
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128 =item C<$obj->ParseFile($fileName)>
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129
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130 Строит документ из файла с именем C<$fileName>.
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131
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132 =back
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133
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134 =cut