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package Data::DynamicValidator::Filter; |
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{ |
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$Data::DynamicValidator::Filter::VERSION = '0.03'; |
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} |
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# ABSTRACT: Class responds for filtering data paths |
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35704
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use strict; |
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311
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use warnings; |
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242
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7561
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use Eval::Closure; |
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79710
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479
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79
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use Try::Tiny; |
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442
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use constant DEBUG => $ENV{DATA_DYNAMICVALIDATOR_DEBUG} || 0; |
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843
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15
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use overload |
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fallback => 1, |
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'&{}' => sub { |
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88
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my $self = shift; |
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88
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247
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return sub { $self->filter(@_) } |
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}; |
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91
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88
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356
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sub new { |
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0
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18584
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my ($class, $condition) = @_; |
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80
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my $self = { |
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_condition => $condition |
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}; |
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109
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bless $self => $class; |
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} |
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sub _prepare { |
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my ($self, $data, $context) = @_; |
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my %environment; |
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88
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my $c = $self->{_condition}; |
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88
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my $type = ref($data); |
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88
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100
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305
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if ($c =~ /\bsize\b/) { |
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my $value; |
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100
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if ($type eq 'HASH') { |
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100
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3
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3
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$value = sub { scalar keys %$data }; |
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} elsif ($type eq 'ARRAY') { |
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9
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1849
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$value = sub { scalar @$data }; |
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41
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} |
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100
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64
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if ($value) { |
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12
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my $val = $value->(); |
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$environment{'$size'} = \$val; |
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} |
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} |
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100
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if ($c =~ /\bvalue\b/) { |
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100
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$environment{'$value'} = \$data if(defined($data)); |
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} |
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88
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100
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100
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353
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if ($c =~ /\bindex\b/ && ref($context) eq 'HASH' |
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100
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51
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&& defined($context->{index}) ) { |
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9
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$environment{'$index'} = \$context->{index}; |
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} |
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88
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100
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100
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1717
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if ($c =~ /\bkey\b/ && ref($context) eq 'HASH' |
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100
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55
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&& defined($context->{key}) ) { |
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25
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66
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$environment{'$key'} = \$context->{key}; |
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} |
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# substitute to environment values in condition |
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88
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284
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for (keys %environment) { |
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74
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2596
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s/^\$//; |
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74
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3550
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$c =~ s/\b($_)\b/\$$1/; |
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} |
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88
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355
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return ($c, \%environment); |
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} |
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66
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sub filter { |
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88
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88
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0
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155
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my ($self, $data, $context) = @_; |
68
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69
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88
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192
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my ($c, $environment) = $self->_prepare($data, $context); |
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88
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197
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my $source = "sub { $c }"; |
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88
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95
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warn "-- evaluating condition as source: $source \n" if(DEBUG); |
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73
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# evaluation phase |
74
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88
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122
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my $result = 0; |
75
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try { |
76
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88
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88
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3446
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my $code = eval_closure( |
77
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source => $source, |
78
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environment => $environment, |
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); |
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74
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21458
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$result = $code->(); |
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} catch { |
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14
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14
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5018
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warn "-- exection has been thrown, considering false: $_ \n" if(DEBUG); |
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88
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719
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}; |
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88
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3062
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warn "-- result: $result: \n" if(DEBUG); |
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88
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471
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return $result; |
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} |
87
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88
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89
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1; |
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91
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__END__ |
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=pod |
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95
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=encoding UTF-8 |
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97
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=head1 NAME |
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99
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Data::DynamicValidator::Filter - Class responds for filtering data paths |
100
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101
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=head1 VERSION |
102
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103
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version 0.03 |
104
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105
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=head1 AUTHOR |
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107
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Ivan Baidakou <dmol@gmx.com> |
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109
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=head1 COPYRIGHT AND LICENSE |
110
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111
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This software is copyright (c) 2014 by Ivan Baidakou. |
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113
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This is free software; you can redistribute it and/or modify it under |
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the same terms as the Perl 5 programming language system itself. |
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116
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=cut |