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package Dallycot::Value::JSON; |
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our $AUTHORITY = 'cpan:JSMITH'; |
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# ABSTRACT: Manages a memory-based JSON object |
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16226
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use strict; |
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740
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use warnings; |
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584
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use utf8; |
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104
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use parent 'Dallycot::Value::Any'; |
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use experimental qw(switch); |
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3065
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use Promises qw(deferred); |
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=head1 DESCRIPTION |
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A JSON value represents a collection of properties and values. |
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Long term, a JSON value will be a JSON-LD document that can be interpreted |
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as a set of triples. These triples will be stored as a triple-store. |
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=cut |
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sub new { |
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my( $class, $hash ) = @_; |
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$class = ref $class || $class; |
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return bless [ $hash ] => $class; |
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} |
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sub calculate_length { |
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my ( $self, $engine ) = @_; |
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my $d = deferred; |
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$d->resolve( $engine->make_numeric( $self->_object_size($self->[0]) ) ); |
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return $d->promise; |
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} |
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sub as_text { |
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my( $self ) = @_; |
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my @values; |
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while(my($k, $v) = each %{$self -> [0]}) { |
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push @values, "\"$k\": " . $v -> as_text; |
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} |
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return '{' . join(",", @values) . '}'; |
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} |
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sub _object_size { |
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my($self, $obj) = @_; |
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my $count = keys %$obj; |
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foreach my $v (values %$obj) { |
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given(ref $v) { |
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when('HASH') { |
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$count += $self->_object_size($v); |
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} |
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when('ARRAY') { |
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$count += @$v; |
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$count += $_ for map { $self->_object_size($_) } grep { 'HASH' eq ref $_ } @$_; |
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67
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} |
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} |
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} |
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return $count; |
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} |
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sub fetch_property { |
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my ( $self, $engine, $prop ) = @_; |
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my $d = deferred; |
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my $value = $self->[0]->{$prop}; |
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0
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given(ref $value) { |
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when('HASH') { |
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$d->resolve(bless [ $value ] => __PACKAGE__); |
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} |
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when('ARRAY') { |
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$d->resolve($self->_convert_to_vector($value)); |
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} |
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0
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when(undef) { |
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0
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$d->resolve(Dallycot::Value::Undefined->new); |
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} |
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0
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default { |
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0
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$d->resolve($value); |
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} |
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} |
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95
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0
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return $d->promise; |
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} |
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98
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sub _convert_to_vector { |
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my($self, $values) = @_; |
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101
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0
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my @converted; |
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103
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0
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for my $v (@$values) { |
104
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0
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given(ref $v) { |
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0
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when('HASH') { |
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0
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push @converted, bless [ $v ] => __PACKAGE__; |
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} |
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0
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when('ARRAY') { |
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push @converted, $self->_convert_to_vector($v); |
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} |
111
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0
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default { |
112
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0
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push @converted, $v; |
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} |
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} |
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} |
116
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117
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0
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return bless \@converted => 'Dallycot::Value::Vector'; |
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} |
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120
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1; |