/usr/share/perl5/AtteanX/Serializer/Turtle.pm is in libattean-perl 0.019-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 | =head1 NAME
AtteanX::Serializer::Turtle - Turtle Serializer
=head1 VERSION
This document describes AtteanX::Serializer::Turtle version 0.019
=head1 SYNOPSIS
use Attean;
my $serializer = Attean->get_serializer('Turtle')->new();
$serializer->serialize_iter_to_io( $io, $fh );
=head1 DESCRIPTION
...
=head1 ATTRIBUTES
=over 4
=item C<< canonical_media_type >>
=item C<< media_types >>
=item C<< handled_type >>
=item C<< file_extensions >>
=back
=head1 METHODS
=over 4
=cut
use v5.14;
use warnings;
package AtteanX::Serializer::Turtle 0.019 {
use Moo;
use Data::Dumper;
use Encode qw(encode);
use Attean::ListIterator;
use List::MoreUtils qw(any);
use AtteanX::Parser::Turtle::Constants;
use AtteanX::Parser::Turtle::Token;
use AtteanX::Serializer::TurtleTokens;
use Types::Standard qw(InstanceOf HashRef ArrayRef Bool Str);
use namespace::clean;
with 'Attean::API::AbbreviatingSerializer';
with 'Attean::API::AppendableSerializer';
with 'Attean::API::TripleSerializer';
sub canonical_media_type { return "text/turtle" }
sub media_types {
return [qw(text/turtle)];
}
sub handled_type {
state $ITEM_TYPE = Type::Tiny::Role->new(role => 'Attean::API::Triple');
return $ITEM_TYPE;
}
sub file_extensions { return [qw(ttl)] }
has 'serializer' => (is => 'rw', isa => InstanceOf['AtteanX::Serializer::TurtleTokens']);
sub BUILD {
my $self = shift;
my $s = $self->serializer;
unless ($s) {
my @args;
if (my $map = $self->namespaces) {
push(@args, namespaces => $map);
}
$s = AtteanX::Serializer::TurtleTokens->new( @args );
$self->serializer($s);
}
}
=item C<< serialize_iter_to_io( $fh, $iterator ) >>
Serializes the Turtle token objects from C<< $iterator >> to the
L<IO::Handle> object C<< $fh >>.
=cut
sub serialize_iter_to_io {
my $self = shift;
my $io = shift;
my $iter = shift;
my @buffer;
# TODO: look for shared subject-predicate in repeated triples, and emit COMMA syntax
# TODO: look for shared subject in repeated triples, and emit SEMICOLON syntax
my $dot = AtteanX::Parser::Turtle::Token->dot;
my $comma = AtteanX::Parser::Turtle::Token->comma;
my $semi = AtteanX::Parser::Turtle::Token->semicolon;
if (my $map = $self->namespaces) {
my $prefix = AtteanX::Parser::Turtle::Token->prefix;
foreach my $ns (sort $map->list_prefixes) {
my $uri = Attean::IRI->new( value => $map->namespace_uri($ns)->as_string );
my $name = AtteanX::Parser::Turtle::Token->fast_constructor( PREFIXNAME, -1, -1, -1, -1, ["${ns}:"] );
my $iri = AtteanX::Parser::Turtle::Token->fast_constructor( IRI, -1, -1, -1, -1, [$uri->value] );
push(@buffer, $prefix);
push(@buffer, $name);
push(@buffer, $iri);
push(@buffer, $dot);
}
}
my $last_subj;
my $last_pred;
my $sub = sub {
if (scalar(@buffer)) {
return shift(@buffer);
}
if (my $t = $iter->next) {
my ($subj, $pred, $obj) = $t->values;
if (defined($last_subj) and $subj->equals($last_subj)) {
if (defined($last_pred) and $pred->equals($last_pred)) {
push(@buffer, $comma);
push(@buffer, $obj->sparql_tokens->elements);
} else {
push(@buffer, $semi);
push(@buffer, $pred->sparql_tokens->elements);
push(@buffer, $obj->sparql_tokens->elements);
}
} else {
if (defined($last_pred)) {
push(@buffer, $dot);
}
foreach my $term ($subj, $pred, $obj) {
push(@buffer, $term->sparql_tokens->elements);
}
}
$last_subj = $subj;
$last_pred = $pred;
return shift(@buffer);
}
if (defined($last_subj)) {
push(@buffer, $dot);
$last_subj = undef;
$last_pred = undef;
return shift(@buffer);
}
return;
};
my $titer = Attean::CodeIterator->new( generator => $sub, item_type => 'AtteanX::Parser::Turtle::Token' );
return $self->serializer->serialize_iter_to_io($io, $titer);
}
=item C<< serialize_iter_to_bytes( $iterator ) >>
Serializes the Turtle token objects from C<< $iterator >>
and returns the serialization as a UTF-8 encoded byte string.
=cut
sub serialize_iter_to_bytes {
my $self = shift;
my $iter = shift;
my $data = encode('UTF-8', '');
open(my $fh, '>', \$data);
$self->serialize_iter_to_io($fh, $iter);
close($fh);
return $data;
}
}
1;
__END__
=back
=head1 BUGS
Please report any bugs or feature requests to through the GitHub web interface
at L<https://github.com/kasei/perlrdf/issues>.
=head1 AUTHOR
Gregory Todd Williams C<< <gwilliams@cpan.org> >>
=head1 COPYRIGHT
Copyright (c) 2014--2018 Gregory Todd Williams. This
program is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.
=cut
|