/usr/share/perl5/RDF/Trine/Node/Blank.pm is in librdf-trine-perl 1.011-2.
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 | # RDF::Trine::Node::Blank
# -----------------------------------------------------------------------------
=head1 NAME
RDF::Trine::Node::Blank - RDF Node class for blank nodes
=head1 VERSION
This document describes RDF::Trine::Node::Blank version 1.011
=cut
package RDF::Trine::Node::Blank;
use strict;
use warnings;
no warnings 'redefine';
use base qw(RDF::Trine::Node);
use Data::Dumper;
use Scalar::Util qw(blessed);
use Carp qw(carp croak confess);
######################################################################
our ($VERSION);
BEGIN {
$VERSION = '1.011';
}
######################################################################
use overload '""' => sub { $_[0]->sse },
;
=head1 METHODS
Beyond the methods documented below, this class inherits methods from the
L<RDF::Trine::Node> class.
=over 4
=cut
=item C<new ( $name )>
Returns a new Blank structure.
=cut
my $COUNTER = 0;
sub new {
my $class = shift;
my $name = shift;
unless (defined($name)) {
$name = 'r' . time() . 'r' . $COUNTER++;
}
my $r_PN_CHARS_U = qr/[_A-Za-z_\x{00C0}-\x{00D6}\x{00D8}-\x{00F6}\x{00F8}-\x{02FF}\x{0370}-\x{037D}\x{037F}-\x{1FFF}\x{200C}-\x{200D}\x{2070}-\x{218F}\x{2C00}-\x{2FEF}\x{3001}-\x{D7FF}\x{F900}-\x{FDCF}\x{FDF0}-\x{FFFD}\x{10000}-\x{EFFFF}]/;
my $r_PN_CHARS = qr"${r_PN_CHARS_U}|[-0-9\x{00B7}\x{0300}-\x{036F}\x{203F}-\x{2040}]";
my $r_bnode_id = qr"(?:${r_PN_CHARS_U}|[0-9])((${r_PN_CHARS}|[.])*${r_PN_CHARS})?";
unless ($name =~ /^${r_bnode_id}$/o) {
throw RDF::Trine::Error::SerializationError -text => "Bad blank node identifier: $name";
}
return $class->_new( $name );
}
sub _new {
my $class = shift;
my $name = shift;
return bless( [ 'BLANK', $name ], $class );
}
=item C<< blank_identifier >>
Returns the identifier of the blank node.
=cut
sub blank_identifier {
my $self = shift;
return $self->[1];
}
=item C<< value >>
Returns the blank identifier.
=cut
sub value {
my $self = shift;
return $self->blank_identifier;
}
=item C<< sse >>
Returns the SSE string for this blank node.
=cut
sub sse {
my $self = shift;
my $id = $self->blank_identifier;
return qq(_:${id});
}
=item C<< as_ntriples >>
Returns the node in a string form suitable for NTriples serialization.
=cut
sub as_ntriples {
my $self = shift;
my $id = $self->blank_identifier;
return qq(_:${id});
}
=item C<< as_string >>
Returns a string representation of the node.
=cut
sub as_string {
my $self = shift;
return '(' . $self->blank_identifier . ')';
}
=item C<< type >>
Returns the type string of this node.
=cut
sub type {
return 'BLANK';
}
=item C<< equal ( $node ) >>
Returns true if the two nodes are equal, false otherwise.
=cut
sub equal {
my $self = shift;
my $node = shift;
return 0 unless (blessed($node) and $node->isa('RDF::Trine::Node::Blank'));
return ($self->blank_identifier eq $node->blank_identifier);
}
# called to compare two nodes of the same type
sub _compare {
my $a = shift;
my $b = shift;
return ($a->blank_identifier cmp $b->blank_identifier);
}
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) 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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