/usr/share/perl5/Attean/QuadModel.pm is in libattean-perl 0.017-1.
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 | use v5.14;
use warnings;
=head1 NAME
Attean::QuadModel - RDF model backed by a quad-store
=head1 VERSION
This document describes Attean::QuadModel version 0.017
=head1 SYNOPSIS
use v5.14;
use Attean;
my $model = Attean::QuadModel->new( store => $store );
=head1 DESCRIPTION
The Attean::QuadModel class represents a model that is backed by a single
L<Attean::API::QuadStore|Attean::API::Store> object.
It conforms to the L<Attean::API::Model> role.
The Attean::QuadModel constructor requires one named argument:
=over 4
=item store
A L<Attean::API::QuadStore|Attean::API::Store> object representing the backing
quad-store.
=back
=head1 METHODS
=over 4
=cut
package Attean::QuadModel 0.017 {
use Moo;
use Scalar::Util qw(reftype);
use namespace::clean;
has 'store' => (
is => 'ro',
does => 'Attean::API::QuadStore',
required => 1,
handles => [qw(size count_quads get_graphs)],
);
=item C<< get_quads ( $subject, $predicate, $object, $graph ) >>
Returns an L<Attean::API::Iterator> for quads in the model that match the
supplied C<< $subject >>, C<< $predicate >>, C<< $object >>, and C<< $graph >>.
Any of these terms may be undefined or a L<Attean::API::Variable> object, in
which case that term will be considered as a wildcard for the purposes of
matching.
The returned iterator conforms to both L<Attean::API::Iterator> and
L<Attean::API::QuadIterator>.
=cut
sub get_quads {
my $self = shift;
my @nodes = @_[0..3];
foreach my $i (0..3) {
my $t = $nodes[$i];
if (not(ref($t)) or reftype($t) ne 'ARRAY') {
$nodes[$i] = [$t];
}
}
my @iters;
foreach my $s (@{ $nodes[0] }) {
foreach my $p (@{ $nodes[1] }) {
foreach my $o (@{ $nodes[2] }) {
foreach my $g (@{ $nodes[3] }) {
push(@iters, $self->store->get_quads($s, $p, $o, $g));
}
}
}
}
if (scalar(@iters) <= 1) {
return shift(@iters);
} else {
return Attean::IteratorSequence->new( iterators => \@iters, item_type => $iters[0]->item_type );
}
}
=item C<< plans_for_algebra( $algebra, $model, $active_graphs, $default_graphs ) >>
Delegates to the underlying store if the store consumes Attean::API::CostPlanner.
=cut
sub plans_for_algebra {
my $self = shift;
if ($self->store->does('Attean::API::CostPlanner')) {
return $self->store->plans_for_algebra(@_);
}
return;
}
=item C<< cost_for_plan( $plan ) >>
Delegates to the underlying store if the store consumes Attean::API::CostPlanner.
=cut
sub cost_for_plan {
my $self = shift;
if ($self->store->does('Attean::API::CostPlanner')) {
return $self->store->cost_for_plan(@_);
}
return;
}
with 'Attean::API::Model';
with 'Attean::API::CostPlanner';
}
package Attean::MutableQuadModel 0.017 {
use Moo;
extends 'Attean::QuadModel';
has 'store' => (
is => 'ro',
does => 'Attean::API::MutableQuadStore',
required => 1,
handles => [qw(size count_quads add_quad remove_quad get_graphs create_graph drop_graph clear_graph add_iter)],
);
with 'Attean::API::MutableModel';
}
1;
__END__
=back
=head1 BUGS
Please report any bugs or feature requests to through the GitHub web interface
at L<https://github.com/kasei/attean/issues>.
=head1 SEE ALSO
L<http://www.perlrdf.org/>
=head1 AUTHOR
Gregory Todd Williams C<< <gwilliams@cpan.org> >>
=head1 COPYRIGHT
Copyright (c) 2014--2016 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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