/usr/share/perl5/RDF/Trine/Parser/LineProtocol.pm is in librdf-trine-perl 1.019-1.
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 | # RDF::Trine::Parser::LineProtocol
# -----------------------------------------------------------------------------
=head1 NAME
RDF::Trine::Parser::LineProtocol - RDF LineProtocol Parser
=head1 VERSION
This document describes RDF::Trine::Parser::LineProtocol version 1.019
=head1 SYNOPSIS
use RDF::Trine::Parser::LineProtocol;
my $serializer = RDF::Trine::Parser::LineProtocol->new();
=head1 DESCRIPTION
The RDF::Trine::Parser::LineProtocol class provides
A line-based protocol for querying and updating triple/quad stores.
=head1 METHODS
=over 4
=cut
package RDF::Trine::Parser::LineProtocol;
use strict;
use warnings;
use Scalar::Util qw(blessed);
use base qw(RDF::Trine::Parser::RDFPatch);
######################################################################
our ($VERSION);
BEGIN {
$VERSION = '1.019';
}
######################################################################
=item C<< handle_op ( $op, $handler, $lineno ) >>
Handles the RDF::Trine::Parser::RDFPatch::Op operation object.
For 'A'dd operations, the C<< $handler >> callback is called with the RDF statement.
Otherwise an exception is thrown.
=cut
sub handle_op {
my $self = shift;
my $op = shift;
my $handler = shift;
my $lineno = shift;
my $opid = $op->op;
if ($opid eq 'F') {
# no-op
} else {
return $self->SUPER::handle_op( $op, $handler, $lineno );
}
}
=item C<< parse_line ( $line, $base ) >>
Parses the Line Protocol string C<< $line >> and returns the corresponding
L<RDF::Trine::Parser::RDFPatch::Op> object.
=cut
sub parse_line {
my $self = shift;
my $line = shift;
my $base = shift;
my ($op, $tail) = split(/ /, $line, 2);
my $p = RDF::Trine::Parser::Turtle->new( 'map' => $self->{namespaces} );
if ($op =~ /^[QF]$/) {
my @nodes;
foreach my $pos (1,2,3,4) {
if ($tail =~ /^\s*U\b/) {
substr($tail, 0, $+[0], '');
my $v = RDF::Trine::Node::Variable->new("v$pos");
$self->{last}[$pos] = $v;
push(@nodes, $v);
} elsif ($tail =~ /^\s*R\b/) {
substr($tail, 0, $+[0], '');
my $node = $self->{last}[$pos];
unless (blessed($node)) {
throw RDF::Trine::Error -text => "Use of non-existent `R`epeated term";
}
push(@nodes, $node);
} elsif ($tail =~ /^\s*[.]/) {
last;
} else {
my $token;
my $n = $p->parse_node($tail, $base, token => \$token);
$self->{last}[$pos] = $n;
push(@nodes, $n);
my $len = $token->column;
substr($tail, 0, $len, '');
}
}
my @args;
if (scalar(@nodes) == 3) {
@args = RDF::Trine::Statement->new(@nodes);
} elsif (scalar(@nodes) == 4) {
@args = RDF::Trine::Statement::Quad->new(@nodes);
} else {
@args = @nodes;
}
return RDF::Trine::Parser::RDFPatch::Op->new( $op, @args );
} else {
return $self->SUPER::parse_line( $line, $base );
}
}
=item C<< execute_line ( $line, $model, $out ) >>
Parses the Line Protocol string C<< $line >> and executes the parsed operation using
the supplied C<< $model >>. If the operation returns results (in the case of a
Query operation), they are printed to the C<< $out >> file handle.
=cut
sub execute_line {
my $self = shift;
my $line = shift;
my $model = shift;
my $out = shift;
return unless ($line =~ /^\S/);
if ($line =~ /[?]/) {
print $out $model->as_string;
return;
}
my $op = $self->parse_line($line);
return unless ($op and blessed($op));
my $map = $self->namespace_map;
if ($op->op =~ /^[AD]$/) {
$op->execute( $model );
} elsif ($op->op eq 'Q') {
my $iter = $op->execute( $model );
my $s = RDF::Trine::Serializer::Turtle->new( namespaces => $map );
while (my $st = $iter->next) {
my @nodes = $st->nodes;
print $out join(' ', 'A', map { $s->serialize_node($_) } @nodes) . " .\n";
}
print $out "F .\n";
}
}
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 SEE ALSO
L<http://afs.github.io/rdf-patch/>
=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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