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407
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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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411
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5 use XML::Parser;
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407
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6
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411
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7 use IMPL::declare {
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8 require => {
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9 Schema => 'IMPL::DOM::Schema', # IMPL::DOM::Schema references IMPL::DOM::XML::Reader
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10 Builder => 'IMPL::DOM::Navigator::Builder',
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11 SimpleBuilder => 'IMPL::DOM::Navigator::SimpleBuilder'
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12 },
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13 base => [
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14 'IMPL::Object' => undef
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15 ],
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16 props => [
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17 Navigator => '*r',
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18 SkipWhitespace => '*r',
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19 _current => '*rw',
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20 _text => '*rw',
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21 _textHistory => '*rw'
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22 ]
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23 };
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407
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24
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25 use IMPL::require {
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411
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26
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407
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27 };
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28
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411
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29 sub CTOR {
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30 my ($this, %params) = @_;
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31
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32 $this->{$Navigator} = $params{Navigator} if $params{Navigator};
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33 $this->{$SkipWhitespace} = $params{SkipWhitespace} if $params{SkipWhitespace};
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407
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34 }
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35
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36 sub Parse {
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37 my ($this,$in) = @_;
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38
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39 my $parser = new XML::Parser(
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40 Handlers => {
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41 Start => sub {shift; goto &OnStart($this,@_)},
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42 End => sub {shift; goto &OnEnd($this,@_)},
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43 Char => sub {shift; goto &OnChar($this,@_)}
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44 }
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45 );
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46
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47 $parser->parse($in);
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48 }
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49
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50 sub ParseFile {
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51 my ($this,$in) = @_;
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52
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53 my $parser = new XML::Parser(
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54 Handlers => {
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55 Start => sub {shift; unshift @_, $this; goto &_OnBegin;},
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56 End => sub {shift; unshift @_, $this; goto &_OnEnd;},
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57 Char => sub {shift; unshift @_, $this; goto &_OnChar;}
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58 }
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59 );
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60
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61 $parser->parsefile($in);
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62 }
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63
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64 sub _OnBegin {
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65 my ($this,$element,%attrs) = @_;
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66
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67 push @{$this->{$_textHistory}},$this->{$_text};
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68 $this->{$_text} = "";
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69 $this->{$_current} = $this->Navigator->NavigateCreate($element,%attrs);
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70 }
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71
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72 sub _OnEnd {
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73 my ($this,$element) = @_;
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74 $this->{$_current}->nodeValue($this->{$_text}) if length $this->{$_text} and (not $this->{$SkipWhitespace} or $this->{$_text} =~ /\S/);
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75 $this->{$_text} = pop @{$this->{$_textHistory}};
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76 $this->{$_current} = $this->Navigator->Back;
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77 }
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78
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79 sub _OnChar {
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80 my ($this,$val) = @_;
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81 $this->{$_text} .= $val;
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82 }
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83
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84 sub LoadDocument {
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85 my ($self,$file,$schema) = @_;
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86
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87 my $parser;
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88 if ($schema) {
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89 $schema = IMPL::DOM::Schema->LoadSchema($schema) if not ref $schema;
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90 $parser = $self->new(
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91 Navigator => IMPL::DOM::Navigator::Builder->new(
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92 'IMPL::DOM::Document',
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93 $schema
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94 )
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95 );
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96 } else {
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97 $parser = $self->new(
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98 Navigator => IMPL::DOM::Navigator::SimpleBuilder->new()
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99 );
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100 }
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101
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102 $parser->ParseFile($file);
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103 my $doc = $parser->Navigator->Document;
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104 my @errors;
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105 if ($schema) {
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106 push @errors, $schema->Validate($doc);
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107 }
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108
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109 if (wantarray) {
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110 return $doc,\@errors;
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111 } else {
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112 die new IMPL::Exception("Loaded document doesn't match the schema", @errors) if @errors;
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113 return $doc;
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114 }
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115 }
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116
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117 1;
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118
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119 __END__
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120
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121 =pod
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122
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123 =head1 SYNOPSIS
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124
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125 my $reader = new IMPL::DOM::XMLReader(Navigator => $DomBuilder);
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126 my $obj = $reader->parsefile("data.xml");
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127
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128 =head1 DESCRIPTION
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129
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130 Простой класс, использующий навигатор для постороения документа. В зависимости от
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131 используемого навигатора может быть получен различный результат.
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132
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133 Навигатор должен поодерживать методы C<NavigateCreate> и C<Back>
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134
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135 =head1 METHODS
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136
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137 =over
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138
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139 =item C<CTOR(Naviagtor => $builder)>
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140
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141 Создает новый экземпляр парсера, с указанным навигатором для построения документа
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142
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143 =item C<$obj->Parse($in)>
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144
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145 Строит документ. На вход получает либо xml строку, либо HANDLE.
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146
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147 =item C<$obj->ParseFile($fileName)>
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148
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149 Строит документ из файла с именем C<$fileName>.
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150
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151 =back
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152
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153 =cut
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