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18
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1 package IMPL::DOM::Navigator::SchemaNavigator;
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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 base qw(IMPL::DOM::Navigator);
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6 use IMPL::Class::Property;
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7 use IMPL::Class::Property::Direct;
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8
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24
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9 require IMPL::DOM::Schema::ComplexType;
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10 require IMPL::DOM::Schema::NodeSet;
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11 require IMPL::DOM::Schema::AnyNode;
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12
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18
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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 Schema => prop_get;
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24
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17 private _direct property _historySteps => prop_all;
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18
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18 }
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19
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20 sub CTOR {
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21 my ($this,$schema) = @_;
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22
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23 $this->{$Schema} = $schema;
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24
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25 die new IMPL::InvalidArgumentException("A schema object is required") unless $schema->isa('IMPL::DOM::Schema');
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26 }
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27
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24
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28 my $schemaAnyNode = IMPL::DOM::Schema::ComplexType->new(type => '::AnyNodeType', nativeType => 'IMPL::DOM::ComplexNode')->appendRange(
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29 IMPL::DOM::Schema::NodeSet->new()->appendRange(
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30 IMPL::DOM::Schema::AnyNode->new()
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31 )
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32 );
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33
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34 sub NavigateName {
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35 my ($this,$name) = @_;
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18
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36
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24
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37 # perform a safe navigation
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38 return dosafe $this sub {
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39 my $steps = 1;
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40 # navigate to node
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41 if (
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42 my $node = $this->Navigate( sub {
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43 $_->isa('IMPL::DOM::Schema::Node') and (
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44 $_->name eq $name
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45 or
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46 $_->nodeName eq 'AnyNode'
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47 or
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48 ( $_->nodeName eq 'SwitchNode' and $_->selectNodes( sub { $_->name eq $name } ) )
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49 )
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50 })
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51 ) {
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52 if ($node->nodeName eq 'AnyNode') {
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53 # if we navigate to the anynode
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54 # assume it to be ComplexType by default
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55 $node = $node->type ? $this->{$Schema}->resolveType($node->type) : $schemaAnyNode;
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56 } elsif ($node->nodeName eq 'SwitchNode') {
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57 # if we are in the switchnode
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58 # navigate to the target node
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59 $node = $this->Navigate(sub { $_->name eq $name });
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60 $steps ++;
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61 }
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62
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63 if ($node->nodeName eq 'Node') {
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64 # if we navigate to a reference
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65 # resolve it
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66 $node = $this->{$Schema}->resolveType($node->type);
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67 $this->internalNavigateNodeSet($node);
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68 $steps++;
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69 }
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70
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71 # if target node is a complex node
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72 if ($node->isa('IMPL::DOM::Schema::ComplexNode')) {
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73 # navigate to it's content
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74 $this->internalNavigateNodeSet($node->content);
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75 $steps ++;
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76 }
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77
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78 push @{$this->{$_historySteps}},$steps;
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79
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80 # return found node schema
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81 return $node;
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82 } else {
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83 die; # abort navigation
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18
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84 }
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85 }
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86 }
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87
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24
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88 sub SchemaBack {
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89 my ($this) = @_;
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90
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91 $this->Back(pop @{$this->{$_historySteps}}) if $this->{$_historySteps};
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92 }
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93
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94 1;
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95 __END__
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96
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97 =pod
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98
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99 =head1 DESCRIPTION
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100
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24
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101 ,
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102 .
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103
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104 =head1 METHODS
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105
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106 =over
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107
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108 =item C<< $navi->NavigateName($name) >>
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109
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110 . C<name>
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111
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112 =item C<< $navi->SchemaBack >>
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113
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114 C<NavigateName>.
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115
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116 .
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117
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118 =back
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18
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119
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120 =cut |
