Mercurial > pub > Impl
annotate Lib/IMPL/DOM/Navigator/SchemaNavigator.pm @ 227:70ad6bc20908
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| author | sergey |
|---|---|
| date | Fri, 07 Sep 2012 16:32:17 +0400 |
| parents | 4d0e1962161c |
| children | 6d8092d8ce1b |
| rev | line source |
|---|---|
| 49 | 1 package IMPL::DOM::Navigator::SchemaNavigator; |
| 2 use strict; | |
| 3 use warnings; | |
| 4 | |
| 165 | 5 use parent qw(IMPL::DOM::Navigator); |
| 49 | 6 use IMPL::Class::Property; |
| 7 use IMPL::Class::Property::Direct; | |
| 8 | |
| 9 require IMPL::DOM::Schema::ComplexType; | |
| 10 require IMPL::DOM::Schema::NodeSet; | |
| 11 require IMPL::DOM::Schema::AnyNode; | |
| 12 | |
| 13 __PACKAGE__->PassThroughArgs; | |
| 14 | |
| 15 BEGIN { | |
| 16 public _direct property Schema => prop_get; | |
| 17 private _direct property _historySteps => prop_all; | |
| 18 } | |
| 19 | |
| 20 sub CTOR { | |
| 21 my ($this,$schema) = @_; | |
| 22 | |
| 23 $this->{$Schema} = $schema; | |
| 24 | |
| 25 die new IMPL::InvalidArgumentException("A schema object is required") unless $schema->isa('IMPL::DOM::Schema'); | |
| 26 } | |
| 27 | |
| 28 my $schemaAnyNode = IMPL::DOM::Schema::ComplexType->new(type => '::AnyNodeType', nativeType => 'IMPL::DOM::ComplexNode')->appendRange( | |
| 29 IMPL::DOM::Schema::NodeSet->new()->appendRange( | |
| 30 IMPL::DOM::Schema::AnyNode->new() | |
| 31 ) | |
| 32 ); | |
| 33 | |
| 34 sub NavigateName { | |
| 35 my ($this,$name) = @_; | |
| 36 | |
| 37 die new IMPL::InvalidArgumentException('name is required') unless defined $name; | |
| 38 | |
| 39 # perform a safe navigation | |
| 40 #return dosafe $this sub { | |
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41 my $steps = 0; |
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42 # if we are currently in a ComplexNode, first go to it's content |
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43 if ($this->Current->isa('IMPL::DOM::Schema::ComplexNode')) { |
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44 # navigate to it's content |
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45 # ComplexNode |
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46 $this->internalNavigateNodeSet($this->Current->content); |
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47 $steps ++; |
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48 } |
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49 |
| 49 | 50 # navigate to node |
| 51 if ( | |
| 52 my $node = $this->Navigate( sub { | |
| 53 $_->isa('IMPL::DOM::Schema::Node') and ( | |
| 54 $_->name eq $name | |
| 55 or | |
| 56 $_->nodeName eq 'AnyNode' | |
| 57 or | |
| 58 ( $_->nodeName eq 'SwitchNode' and $_->selectNodes( sub { $_->name eq $name } ) ) | |
| 59 ) | |
| 60 }) | |
| 61 ) { | |
| 194 | 62 $steps ++; |
| 49 | 63 if ($node->nodeName eq 'AnyNode') { |
| 64 # if we navigate to the anynode | |
| 65 # assume it to be ComplexType by default | |
| 66 $node = $node->type ? $this->{$Schema}->resolveType($node->type) : $schemaAnyNode; | |
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67 $this->internalNavigateNodeSet($node); |
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68 $steps ++; |
| 49 | 69 } elsif ($node->nodeName eq 'SwitchNode') { |
| 70 # if we are in the switchnode | |
| 71 # navigate to the target node | |
| 72 $node = $this->Navigate(sub { $_->name eq $name }); | |
| 73 $steps ++; | |
| 74 } | |
| 75 | |
| 76 if ($node->nodeName eq 'Node') { | |
| 77 # if we navigate to a reference | |
| 78 # resolve it | |
| 79 $node = $this->{$Schema}->resolveType($node->type); | |
| 80 $this->internalNavigateNodeSet($node); | |
| 81 $steps++; | |
| 82 } | |
| 83 | |
| 84 push @{$this->{$_historySteps}},$steps; | |
| 85 | |
| 86 # return found node schema | |
| 87 return $node; | |
| 88 } else { | |
| 89 return undef; # abort navigation | |
| 90 } | |
| 91 #} | |
| 92 } | |
| 93 | |
| 94 sub SchemaBack { | |
| 95 my ($this) = @_; | |
| 96 | |
| 97 $this->Back(pop @{$this->{$_historySteps}}) if $this->{$_historySteps}; | |
| 98 } | |
| 99 | |
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100 sub SourceSchemaNode { |
| 194 | 101 my ($this) = @_; |
| 102 | |
| 103 if ($this->Current->isa('IMPL::DOM::Schema::SimpleType') or | |
| 104 $this->Current->isa('IMPL::DOM::Schema::ComplexType') | |
| 105 ) { | |
| 106 # we a redirected | |
| 107 return $this->GetNodeFromHistory(-1); | |
| 108 } else { | |
| 109 return $this->Current; | |
| 110 } | |
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111 } |
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112 |
| 49 | 113 1; |
| 114 __END__ | |
| 115 | |
| 116 =pod | |
| 117 | |
| 118 =head1 DESCRIPTION | |
| 119 | |
| 180 | 120 Помимо стандартных методов навигации позволяет переходить по элементам документа, |
| 121 который данной схемой описывается. | |
| 49 | 122 |
| 123 =head1 METHODS | |
| 124 | |
| 125 =over | |
| 126 | |
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127 =item C<NavigateName($name)> |
| 49 | 128 |
| 180 | 129 Переходит на схему узла с указанным именем. Тоесть использует свойство C<name>. |
| 49 | 130 |
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131 =item C<SchemaBack> |
| 49 | 132 |
| 180 | 133 Возвращается на позицию до последней операции C<NavigateName>. Данный метод нужен |
| 134 посокольку операция навигации по элементам описываемым схемой может приводить к | |
| 135 нескольким операциям навигации по самой схеме. | |
| 49 | 136 |
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137 =item C<SourceSchemaNode> |
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138 |
| 180 | 139 Получает схему узла из которого было выполнено перенаправление, например, C<IMPL::DOM::Schema::Node>. |
| 140 В остальных случаях совпадает со свойством C<Current>. | |
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141 |
| 49 | 142 =back |
| 143 | |
| 144 =cut |