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package XML::Struct::Simple; |
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168319
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use strict; |
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190
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545
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use Moo; |
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11112
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32
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3003
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use List::Util qw(first); |
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452
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use Scalar::Util qw(reftype blessed); |
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6
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302
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use Carp qw(carp); |
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6
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4941
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our $VERSION = '0.27'; |
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has root => ( |
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is => 'rw', |
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default => sub { 0 }, |
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); |
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has attributes => ( |
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is => 'rw', |
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default => sub { 1 }, |
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coerce => sub { !defined $_[0] or ($_[0] and $_[0] ne 'remove') }, |
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); |
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has content => ( |
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is => 'rw', |
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default => sub { 'content' }, |
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); |
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has depth => ( |
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is => 'rw', |
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coerce => sub { (defined $_[0] and $_[0] >= 0) ? $_[0] : undef }, |
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); |
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31
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sub transform { |
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my ($self, $element) = @_; |
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34
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40
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94
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my $simple = $self->transform_content($element,0); |
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36
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# enforce root for special case <root>text</root> |
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40
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100
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100
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202
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if ($self->root or !ref $simple) { |
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100
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my $root = $self->root !~ /^[+-]?[0-9]+$/ ? $self->root : $element->[0]; |
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159
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return { $root => $simple }; |
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} else { |
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return $simple; |
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} |
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} |
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45
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# returns a (possibly empty) hash or a scalar |
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sub transform_content { |
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121
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121
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1
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my ($self, $element, $depth) = @_; |
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121
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$depth = 0 if !defined $depth; |
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50
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121
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100
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100
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2106
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if (defined $self->depth and $depth >= $self->depth) { |
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100
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51
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14
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348
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return $element; |
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} elsif ( @$element == 1 ) { # empty tag |
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2
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return { }; |
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} |
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56
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105
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954
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my $attributes = {}; |
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105
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138
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my $children; |
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59
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105
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100
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352
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if ( reftype $element->[1] eq 'HASH' ) { # [ $tag, \%attributes, \@children ] |
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97
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100
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1588
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$attributes = $element->[1] if $self->attributes; |
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97
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658
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$children = $element->[2]; |
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} else { # [ $tag, \@children ] |
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$children = $element->[1]; |
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} |
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66
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# no element children |
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105
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100
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93
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unless ( first { ref $_ } @$children ) { |
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284
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68
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57
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134
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my $content = join "", @$children; |
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100
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147
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if ($content eq '') { |
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100
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70
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20
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82
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return { %$attributes }; |
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} elsif (!%$attributes) { |
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32
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92
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return $content; |
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} else { |
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5
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return { %$attributes, $self->content => $content }; |
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} |
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} |
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78
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48
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186
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my $simple = { map {$_ => [$attributes->{$_}] } keys %$attributes }; |
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36
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79
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80
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111
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foreach my $child ( @$children ) { |
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192
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next unless ref $child; # skip mixed content text |
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83
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125
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my $name = $child->[0]; |
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81
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198
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my $content = $self->transform_content($child, $depth+1); |
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86
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100
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215
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if ( $simple->{$name} ) { |
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push @{$simple->{$name}}, $content; |
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88
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} else { |
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67
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207
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$simple->{$name} = [$content]; |
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} |
91
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} |
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93
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48
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154
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foreach my $name (keys %$simple) { |
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next if @{$simple->{$name}} != 1; |
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198
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60
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112
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my $c = $simple->{$name}->[0]; |
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100
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66
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267
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if (!ref $c or (!blessed $c and reftype $c eq 'HASH')) { |
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100
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97
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52
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$simple->{$name} = $c; |
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} |
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} |
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101
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48
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99
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return $simple; |
102
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} |
103
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104
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sub removeXMLAttr { |
105
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4
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4
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0
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803
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my $node = shift; |
106
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107
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4
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100
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10
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carp "removeXMLAttr is deprecated" |
108
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if 'XML::Struct::Simple::removeXMLAttr' ne (caller(1))[3]; |
109
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110
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ref $node |
111
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? ( $node->[2] |
112
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4
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50
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797
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? [ $node->[0], [ map { removeXMLAttr($_,1) } @{$node->[2]} ] ] |
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100
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2
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5
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113
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: [ $node->[0] ] ) # empty element |
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: $node; # text node |
115
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} |
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117
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1; |
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__END__ |
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120
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=encoding UTF-8 |
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122
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=head1 NAME |
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124
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XML::Struct::Simple - Transform MicroXML data structures into simple (unordered) form |
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126
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=head1 SYNOPSIS |
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128
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my $micro = [ |
129
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root => { xmlns => 'http://example.org/' }, |
130
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[ '!', [ x => {}, [42] ] ] |
131
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]; |
132
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my $converter = XML::Struct::Simple->new( root => 'record' ); |
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my $simple = $converter->transform( $micro ); |
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# { record => { xmlns => 'http://example.org/', x => 42 } } |
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136
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=head1 DESCRIPTION |
137
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138
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This module implements a transformation from structured XML (MicroXML) to |
139
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simple key-value format (SimpleXML) as known from L<XML::Simple>: Attributes |
140
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and child elements are treated as hash keys with their content as value. Text |
141
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elements without attributes are converted to text and empty elements without |
142
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attributes are converted to empty hashes. |
143
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144
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L<XML::Struct> can export the function C<simpleXML> for easy use. Function |
145
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C<readXML> and L<XML::Struct::Reader> apply transformation to SimpleXML with |
146
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option C<simple>. |
147
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148
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=head1 METHODS |
149
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150
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=head2 transform( $element ) |
151
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152
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Transform XML given as array reference (MicroXML) to XML as hash reference |
153
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(SimpleXML) as configured. |
154
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155
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=head2 transform_content( $element [, $depth ] ) |
156
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157
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Transform child nodes and attributes of an XML element given as array reference |
158
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at a given depth (C<0> by default). Returns a hash reference, a scalar, or the |
159
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element unmodified. |
160
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161
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=head1 CONFIGURATION |
162
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163
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=over |
164
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165
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=item root |
166
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167
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Keep the root element instead of removing. This corresponds to option |
168
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C<KeepRoot> in L<XML::Simple>. In addition a non-numeric value can be used to |
169
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override the name of the root element. Disabled by default. |
170
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171
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=item attributes |
172
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173
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Include XML attributes. Enabled by default. The special value C<remove> is |
174
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equivalent to false. Corresponds to option C<NoAttr> in L<XML::Simple>. |
175
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176
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=item content |
177
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178
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Name of a field to put text content in. Set to "C<content> by default. |
179
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Corresponds to option C<ContentKey> in L<XML::Simple>. |
180
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181
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=item depth |
182
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183
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Only transform up to a given depth. Set to a negative value by default for |
184
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unlimited depth. Elements below depth are not cloned but copied by reference. |
185
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Depth 0 will return the element unmodified. |
186
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187
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=back |
188
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189
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Option C<KeyAttr>, C<ForceArray>, and other fetures of L<XML::Simple> not |
190
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supported. Options C<NsExpand> and C<NsStrip> supported in |
191
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L<XML::LibXML::Simple> are not supported yet. |
192
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193
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=cut |