/usr/share/perl5/AtteanX/Model/SPARQL.pm is in libatteanx-store-sparql-perl 0.010-1.
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 | package AtteanX::Model::SPARQL;
use v5.14;
use warnings;
our $AUTHORITY = 'cpan:KJETILK';
our $VERSION = '0.010';
use Moo;
use Types::Standard qw(InstanceOf);
use namespace::clean;
has 'store' => (
is => 'ro',
isa => InstanceOf['AtteanX::Store::SPARQL'],
required => 1,
handles => { size => 'size' ,
get_quads => 'get_triples',
count_quads => 'count_triples',
get_sparql => 'get_sparql',
plans_for_algebra => 'plans_for_algebra'
}
);
with 'Attean::API::Model', 'Attean::API::CostPlanner';
sub cost_for_plan {
my $self = shift;
my $plan = shift;
my $planner = shift;
# TODO: check if the store does something
if ($plan->isa('AtteanX::Plan::SPARQLBGP')) {
# BGPs should have a cost proportional to the number of triple patterns,
# but be much more costly if they contain a cartesian product.
if ($plan->children_are_variable_connected) {
return 10 * scalar(@{ $plan->children });
} else {
return 100 * scalar(@{ $plan->children });
}
}
return;
}
sub get_graphs {
return Attean::ListIterator->new();
}
1;
__END__
=pod
=encoding utf-8
=head1 NAME
AtteanX::Model::SPARQL - Attean SPARQL Model
=head1 SYNOPSIS
my $store = Attean->get_store('SPARQL')->new(endpoint_url => $url);
my $model = AtteanX::Model::SPARQL->new( store => $store );
=head1 DESCRIPTION
This model is in practice a thin wrapper around the underlying SPARQL
store, that adds facilities only to allow quering and planning with
quad semantics.
It consumes L<Attean::API::Model> and L<Attean::API::CostPlanner> and
adds no new methods or attributes.
=head1 OTHER DETAILS
For author, copyright and other details, see L<AtteanX::Store::SPARQL>.
=cut
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