Mercurial > pub > Impl
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 |
| rev | line source |
|---|---|
| 49 | 1 package IMPL::DOM::XMLReader; |
| 2 use strict; | |
| 3 use warnings; | |
| 4 | |
| 166 | 5 use parent qw(IMPL::Object IMPL::Object::Autofill); |
| 49 | 6 use IMPL::Class::Property; |
| 7 use IMPL::Class::Property::Direct; | |
| 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; |
| 49 | 12 |
| 13 __PACKAGE__->PassThroughArgs; | |
| 14 | |
| 15 BEGIN { | |
| 16 public _direct property Navigator => prop_get | owner_set; | |
| 152 | 17 public _direct property SkipWhitespace => prop_get | owner_set; |
| 49 | 18 private _direct property _current => prop_all; |
| 19 private _direct property _text => prop_all; | |
| 20 private _direct property _textHistory => prop_all; | |
| 21 } | |
| 22 | |
| 23 sub Parse { | |
| 24 my ($this,$in) = @_; | |
| 25 | |
| 26 my $parser = new XML::Parser( | |
| 27 Handlers => { | |
| 28 Start => sub {shift; goto &OnStart($this,@_)}, | |
| 29 End => sub {shift; goto &OnEnd($this,@_)}, | |
| 30 Char => sub {shift; goto &OnChar($this,@_)} | |
| 31 } | |
| 32 ); | |
| 33 | |
| 34 $parser->parse($in); | |
| 35 } | |
| 36 | |
| 37 sub ParseFile { | |
| 38 my ($this,$in) = @_; | |
| 39 | |
| 40 my $parser = new XML::Parser( | |
| 41 Handlers => { | |
| 42 Start => sub {shift; unshift @_, $this; goto &_OnBegin;}, | |
| 43 End => sub {shift; unshift @_, $this; goto &_OnEnd;}, | |
| 44 Char => sub {shift; unshift @_, $this; goto &_OnChar;} | |
| 45 } | |
| 46 ); | |
| 47 | |
| 48 $parser->parsefile($in); | |
| 49 } | |
| 50 | |
| 51 sub _OnBegin { | |
| 52 my ($this,$element,%attrs) = @_; | |
| 53 | |
| 54 push @{$this->{$_textHistory}},$this->{$_text}; | |
| 55 $this->{$_text} = ""; | |
| 56 $this->{$_current} = $this->Navigator->NavigateCreate($element,%attrs); | |
| 57 } | |
| 58 | |
| 59 sub _OnEnd { | |
| 60 my ($this,$element) = @_; | |
| 152 | 61 $this->{$_current}->nodeValue($this->Navigator->inflateValue( $this->{$_text} ) ) if length $this->{$_text} and (not $this->{$SkipWhitespace} or $this->{$_text} =~ /\S/); |
| 49 | 62 $this->{$_text} = pop @{$this->{$_textHistory}}; |
| 63 $this->{$_current} = $this->Navigator->Back; | |
| 64 } | |
| 65 | |
| 66 sub _OnChar { | |
| 67 my ($this,$val) = @_; | |
| 68 $this->{$_text} .= $val; | |
| 69 } | |
| 70 | |
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71 sub LoadDocument { |
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72 my ($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 |
| 49 | 99 1; |
| 100 | |
| 101 __END__ | |
| 102 | |
| 103 =pod | |
| 104 | |
| 105 =head1 SYNOPSIS | |
| 106 | |
| 107 my $reader = new IMPL::DOM::XMLReader(Navigator => $DomBuilder); | |
| 108 my $obj = $reader->parsefile("data.xml"); | |
| 109 | |
| 110 =head1 DESCRIPTION | |
| 111 | |
| 112 Простой класс, использующий навигатор для постороения документа. В зависимости от | |
| 113 используемого навигатора может быть получен различный результат. | |
| 114 | |
| 115 Навигатор должен поодерживать методы C<NavigateCreate> и C<Back> | |
| 116 | |
| 117 =head1 METHODS | |
| 118 | |
| 119 =over | |
| 120 | |
| 121 =item C<CTOR(Naviagtor => $builder)> | |
| 122 | |
| 123 Создает новый экземпляр парсера, с указанным навигатором для построения документа | |
| 124 | |
| 125 =item C<$obj->Parse($in)> | |
| 126 | |
| 127 Строит документ. На вход получает либо xml строку, либо HANDLE. | |
| 128 | |
| 129 =item C<$obj->ParseFile($fileName)> | |
| 130 | |
| 131 Строит документ из файла с именем C<$fileName>. | |
| 132 | |
| 133 =back | |
| 134 | |
| 135 =cut |