annotate Lib/IMPL/DOM/XMLReader.pm @ 275:6253872024a4

*refactoring IMPL::Class
author cin
date Thu, 31 Jan 2013 02:18:31 +0400
parents 0f59b2de72af
children 4ddb27ff4a0b
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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 IMPL::Class::Property::Direct;
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9 use XML::Parser;
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10
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11 use IMPL::require {
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12 Schema => 'IMPL::DOM::Schema', # IMPL::DOM::Schema references IMPL::DOM::XML::Reader
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13 Builder => 'IMPL::DOM::Navigator::Builder',
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14 SimpleBuilder => 'IMPL::DOM::Navigator::SimpleBuilder'
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15 };
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16
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17 __PACKAGE__->PassThroughArgs;
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18
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19 BEGIN {
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20 public _direct property Navigator => prop_get | owner_set;
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21 public _direct property SkipWhitespace => prop_get | owner_set;
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22 private _direct property _current => prop_all;
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23 private _direct property _text => prop_all;
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24 private _direct property _textHistory => prop_all;
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25 }
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26
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27 sub Parse {
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28 my ($this,$in) = @_;
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29
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30 my $parser = new XML::Parser(
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31 Handlers => {
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32 Start => sub {shift; goto &OnStart($this,@_)},
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33 End => sub {shift; goto &OnEnd($this,@_)},
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34 Char => sub {shift; goto &OnChar($this,@_)}
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35 }
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36 );
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37
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38 $parser->parse($in);
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39 }
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40
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41 sub ParseFile {
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42 my ($this,$in) = @_;
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43
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44 my $parser = new XML::Parser(
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45 Handlers => {
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46 Start => sub {shift; unshift @_, $this; goto &_OnBegin;},
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47 End => sub {shift; unshift @_, $this; goto &_OnEnd;},
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48 Char => sub {shift; unshift @_, $this; goto &_OnChar;}
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49 }
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50 );
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51
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52 $parser->parsefile($in);
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53 }
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54
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55 sub _OnBegin {
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56 my ($this,$element,%attrs) = @_;
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57
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58 push @{$this->{$_textHistory}},$this->{$_text};
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59 $this->{$_text} = "";
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60 $this->{$_current} = $this->Navigator->NavigateCreate($element,%attrs);
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61 }
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62
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63 sub _OnEnd {
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64 my ($this,$element) = @_;
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65 $this->{$_current}->nodeValue($this->Navigator->inflateValue( $this->{$_text} ) ) if length $this->{$_text} and (not $this->{$SkipWhitespace} or $this->{$_text} =~ /\S/);
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66 $this->{$_text} = pop @{$this->{$_textHistory}};
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67 $this->{$_current} = $this->Navigator->Back;
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68 }
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70 sub _OnChar {
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71 my ($this,$val) = @_;
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72 $this->{$_text} .= $val;
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73 }
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74
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75 sub LoadDocument {
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76 my ($self,$file,$schema) = @_;
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77
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78 my $parser;
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79 if ($schema) {
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80 $schema = IMPL::DOM::Schema->LoadSchema($schema) if not ref $schema;
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81 $parser = $self->new(
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82 Navigator => IMPL::DOM::Navigator::Builder->new(
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83 'IMPL::DOM::Document',
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84 $schema
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85 )
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86 );
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87 } else {
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88 $parser = $self->new(
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89 Navigator => IMPL::DOM::Navigator::SimpleBuilder->new()
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90 );
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91 }
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92
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93 $parser->ParseFile($file);
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94 my $doc = $parser->Navigator->Document;
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95 if ($schema) {
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96 my @errors = $parser->Navigator->BuildErrors;
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97 push @errors, $schema->Validate($doc);
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98 die new IMPL::Exception("Loaded document doesn't match the schema", @errors) if @errors;
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99 }
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100 return $doc;
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101 }
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102
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103 1;
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104
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105 __END__
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106
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107 =pod
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108
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109 =head1 SYNOPSIS
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110
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111 my $reader = new IMPL::DOM::XMLReader(Navigator => $DomBuilder);
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112 my $obj = $reader->parsefile("data.xml");
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113
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114 =head1 DESCRIPTION
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115
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116 Простой класс, использующий навигатор для постороения документа. В зависимости от
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117 используемого навигатора может быть получен различный результат.
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118
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119 Навигатор должен поодерживать методы C<NavigateCreate> и C<Back>
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120
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121 =head1 METHODS
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122
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123 =over
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124
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125 =item C<CTOR(Naviagtor => $builder)>
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126
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127 Создает новый экземпляр парсера, с указанным навигатором для построения документа
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128
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129 =item C<$obj->Parse($in)>
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130
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131 Строит документ. На вход получает либо xml строку, либо HANDLE.
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132
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133 =item C<$obj->ParseFile($fileName)>
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134
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135 Строит документ из файла с именем C<$fileName>.
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136
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137 =back
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138
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139 =cut