annotate Lib/IMPL/DOM/XMLReader.pm @ 168:6148f89bb7bf

IMPL::SQL::Schema::Traits::Diff alfa version IMPL::lang added hash traits
author sourcer
date Mon, 16 May 2011 04:30:38 +0400
parents 4267a2ac3d46
children d1676be8afcc
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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 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 public _direct property SkipWhitespace => prop_get | owner_set;
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18 private _direct property _current => prop_all;
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19 private _direct property _text => prop_all;
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20 private _direct property _textHistory => prop_all;
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21 }
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22
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23 sub Parse {
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24 my ($this,$in) = @_;
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25
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26 my $parser = new XML::Parser(
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27 Handlers => {
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28 Start => sub {shift; goto &OnStart($this,@_)},
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29 End => sub {shift; goto &OnEnd($this,@_)},
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30 Char => sub {shift; goto &OnChar($this,@_)}
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31 }
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32 );
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33
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34 $parser->parse($in);
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35 }
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36
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37 sub ParseFile {
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38 my ($this,$in) = @_;
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39
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40 my $parser = new XML::Parser(
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41 Handlers => {
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42 Start => sub {shift; unshift @_, $this; goto &_OnBegin;},
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43 End => sub {shift; unshift @_, $this; goto &_OnEnd;},
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44 Char => sub {shift; unshift @_, $this; goto &_OnChar;}
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45 }
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46 );
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47
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48 $parser->parsefile($in);
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49 }
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50
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51 sub _OnBegin {
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52 my ($this,$element,%attrs) = @_;
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53
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54 push @{$this->{$_textHistory}},$this->{$_text};
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55 $this->{$_text} = "";
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56 $this->{$_current} = $this->Navigator->NavigateCreate($element,%attrs);
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57 }
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58
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59 sub _OnEnd {
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60 my ($this,$element) = @_;
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61 $this->{$_current}->nodeValue($this->Navigator->inflateValue( $this->{$_text} ) ) if length $this->{$_text} and (not $this->{$SkipWhitespace} or $this->{$_text} =~ /\S/);
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62 $this->{$_text} = pop @{$this->{$_textHistory}};
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63 $this->{$_current} = $this->Navigator->Back;
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64 }
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65
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66 sub _OnChar {
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67 my ($this,$val) = @_;
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68 $this->{$_text} .= $val;
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69 }
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71 sub LoadDocument {
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72 my ($self,$file,$schema) = @_;
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73
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74 my $parser;
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75 if ($schema) {
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76 $schema = IMPL::DOM::Schema->LoadSchema($schema) if not ref $schema;
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77 $parser = $self->new(
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78 Navigator => IMPL::DOM::Navigator::Builder->new(
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79 'IMPL::DOM::Document',
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80 $schema
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81 )
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82 );
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83 } else {
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84 $parser = $self->new(
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85 Navigator => IMPL::DOM::Navigator::SimpleBuilder->new()
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86 );
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87 }
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88
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89 $parser->ParseFile($file);
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90 my $doc = $parser->Navigator->Document;
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91 if ($schema) {
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92 my @errors = $parser->Navigator->BuildErrors;
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93 push @errors, $schema->Validate($doc);
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94 die new IMPL::Exception("Loaded document doesn't match the schema", @errors) if @errors;
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95 }
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96 return $doc;
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97 }
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98
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99 1;
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100
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101 __END__
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102
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103 =pod
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104
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105 =head1 SYNOPSIS
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106
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107 my $reader = new IMPL::DOM::XMLReader(Navigator => $DomBuilder);
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108 my $obj = $reader->parsefile("data.xml");
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109
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110 =head1 DESCRIPTION
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111
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112 Простой класс, использующий навигатор для постороения документа. В зависимости от
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113 используемого навигатора может быть получен различный результат.
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114
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115 Навигатор должен поодерживать методы C<NavigateCreate> и C<Back>
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116
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117 =head1 METHODS
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118
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119 =over
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120
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121 =item C<CTOR(Naviagtor => $builder)>
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122
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123 Создает новый экземпляр парсера, с указанным навигатором для построения документа
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124
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125 =item C<$obj->Parse($in)>
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126
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127 Строит документ. На вход получает либо xml строку, либо HANDLE.
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128
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129 =item C<$obj->ParseFile($fileName)>
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130
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131 Строит документ из файла с именем C<$fileName>.
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132
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133 =back
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134
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135 =cut