/usr/share/perl5/RDF/Trine/Parser/RDFJSON.pm is in librdf-trine-perl 1.007-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# -----------------------------------------------------------------------------
=head1 NAME
RDF::Trine::Parser::RDFJSON - RDF/JSON RDF Parser
=head1 VERSION
This document describes RDF::Trine::Parser::RDFJSON version 1.007
=head1 SYNOPSIS
use RDF::Trine::Parser;
my $parser = RDF::Trine::Parser->new( 'RDF/JSON' );
$parser->parse_into_model( $base_uri, $data, $model );
=head1 DESCRIPTION
...
=head1 METHODS
Beyond the methods documented below, this class inherits methods from the
L<RDF::Trine::Parser> class.
=over 4
=cut
package RDF::Trine::Parser::RDFJSON;
use strict;
use warnings;
no warnings 'redefine';
no warnings 'once';
use base qw(RDF::Trine::Parser);
use URI;
use Log::Log4perl;
use RDF::Trine qw(literal);
use RDF::Trine::Statement;
use RDF::Trine::Namespace;
use RDF::Trine::Node;
use RDF::Trine::Error qw(:try);
use Scalar::Util qw(blessed looks_like_number);
use JSON;
our ($VERSION, $rdf, $xsd);
our ($r_boolean, $r_comment, $r_decimal, $r_double, $r_integer, $r_language, $r_lcharacters, $r_line, $r_nameChar_extra, $r_nameStartChar_minus_underscore, $r_scharacters, $r_ucharacters, $r_booltest, $r_nameStartChar, $r_nameChar, $r_prefixName, $r_qname, $r_resource_test, $r_nameChar_test);
BEGIN {
$VERSION = '1.007';
$RDF::Trine::Parser::parser_names{ 'rdfjson' } = __PACKAGE__;
foreach my $ext (qw(json js)) {
$RDF::Trine::Parser::file_extensions{ $ext } = __PACKAGE__;
}
my $class = __PACKAGE__;
$RDF::Trine::Parser::canonical_media_types{ $class } = 'application/json';
foreach my $type (qw(application/json application/x-rdf+json)) {
$RDF::Trine::Parser::media_types{ $type } = __PACKAGE__;
}
}
=item C<< new >>
Returns a new RDFJSON parser.
=cut
sub new {
my $class = shift;
my %args = @_;
my $prefix = '';
if (defined($args{ bnode_prefix })) {
$prefix = $args{ bnode_prefix };
} else {
$prefix = $class->new_bnode_prefix();
}
my $self = bless({
bindings => {},
bnode_id => 0,
bnode_prefix => $prefix,
@_
}, $class);
return $self;
}
=item C<< parse_into_model ( $base_uri, $data, $model [, context => $context] ) >>
Parses the C<< $data >>, using the given C<< $base_uri >>. For each RDF
statement parsed, will call C<< $model->add_statement( $statement ) >>.
=cut
sub parse_into_model {
my $proto = shift;
my $self = blessed($proto) ? $proto : $proto->new();
my $uri = shift;
if (blessed($uri) and $uri->isa('RDF::Trine::Node::Resource')) {
$uri = $uri->uri_value;
}
my $input = shift;
my $model = shift;
my %args = @_;
my $context = $args{'context'};
my $opts = $args{'json_opts'};
my $handler = sub {
my $st = shift;
if ($context) {
my $quad = RDF::Trine::Statement::Quad->new( $st->nodes, $context );
$model->add_statement( $quad );
} else {
$model->add_statement( $st );
}
};
return $self->parse( $uri, $input, $handler, $opts );
}
=item C<< parse ( $base_uri, $rdf, \&handler ) >>
Parses the C<< $data >>, using the given C<< $base_uri >>. Calls the
C<< triple >> method for each RDF triple parsed. This method does nothing by
default, but can be set by using one of the default C<< parse_* >> methods.
=cut
sub parse {
my $self = shift;
my $uri = shift;
my $input = shift;
my $handler = shift;
my $opts = shift;
my $index = eval { from_json($input, $opts) };
if ($@) {
throw RDF::Trine::Error::ParserError -text => "$@";
}
foreach my $s (keys %$index) {
my $ts = ( $s =~ /^_:(.*)$/ ) ?
RDF::Trine::Node::Blank->new($self->{bnode_prefix} . $1) :
RDF::Trine::Node::Resource->new($s, $uri);
foreach my $p (keys %{ $index->{$s} }) {
my $tp = RDF::Trine::Node::Resource->new($p, $uri);
foreach my $O (@{ $index->{$s}->{$p} }) {
my $to;
# $O should be a hashref, but we can do a little error-correcting.
unless (ref $O) {
if ($O =~ /^_:/) {
$O = { 'value'=>$O, 'type'=>'bnode' };
} elsif ($O =~ /^[a-z0-9._\+-]{1,12}:\S+$/i) {
$O = { 'value'=>$O, 'type'=>'uri' };
} elsif ($O =~ /^(.*)\@([a-z]{2})$/) {
$O = { 'value'=>$1, 'type'=>'literal', 'lang'=>$2 };
} else {
$O = { 'value'=>$O, 'type'=>'literal' };
}
}
if (lc $O->{'type'} eq 'literal') {
$to = RDF::Trine::Node::Literal->new(
$O->{'value'}, $O->{'lang'}, $O->{'datatype'});
} else {
$to = ( $O->{'value'} =~ /^_:(.*)$/ ) ?
RDF::Trine::Node::Blank->new($self->{bnode_prefix} . $1) :
RDF::Trine::Node::Resource->new($O->{'value'}, $uri);
}
if ( $ts && $tp && $to ) {
if ($self->{canonicalize}) {
if ($to->isa('RDF::Trine::Node::Literal') and $to->has_datatype) {
my $value = $to->literal_value;
my $dt = $to->literal_datatype;
my $canon = RDF::Trine::Node::Literal->canonicalize_literal_value( $value, $dt, 1 );
$to = literal( $canon, undef, $dt );
}
}
my $st = RDF::Trine::Statement->new($ts, $tp, $to);
$handler->($st);
}
}
}
}
return;
}
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
Toby Inkster <tobyink@cpan.org>
Gregory Williams <gwilliams@cpan.org>
=head1 COPYRIGHT
Copyright (c) 2006-2012 Gregory Todd Williams. This
program is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.
=cut
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