/usr/share/perl5/RDF/Trine/Iterator/Bindings/Materialized.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.
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# -----------------------------------------------------------------------------
=head1 NAME
RDF::Trine::Iterator::Bindings::Materialized - Materialized bindings class
=head1 VERSION
This document describes RDF::Trine::Iterator::Bindings::Materialized version 1.011
=head1 SYNOPSIS
use RDF::Trine::Iterator;
my $iterator = RDF::Trine::Iterator::Bindings::Materialized->new( \@data, \@names );
while (my $row = $iterator->next) {
my @vars = keys %$row;
# do something with @vars
}
my $iterator = RDF::Trine::Iterator::Bindings->new( \&code, \@names );
my $miter = $iterator->materialize;
while (my $row = $miter->next) {
my @vars = keys %$row;
# do something with @vars
}
$miter->reset; # start the iteration again
while (my $row = $miter->next) {
# ...
}
=head1 METHODS
Beyond the methods documented below, this class inherits methods from the
L<RDF::Trine::Iterator::Bindings> class.
=over 4
=cut
package RDF::Trine::Iterator::Bindings::Materialized;
use strict;
use warnings;
no warnings 'redefine';
use Data::Dumper;
use base qw(RDF::Trine::Iterator::Bindings);
use Scalar::Util qw(blessed reftype);
our ($VERSION);
BEGIN {
$VERSION = '1.011';
}
=item C<< new ( \@results, \@names, %args ) >>
Returns a new materialized bindings interator. Results must be a reference to an
array containing individual results.
=cut
sub new {
my $class = shift;
my $data = shift || [];
my $names = shift || [];
Carp::confess unless (scalar(@_) % 2 == 0);
my %args = @_;
if (reftype($data) eq 'CODE') {
my @rows;
while (my $row = $data->()) {
push(@rows, $row);
}
$data = \@rows;
}
Carp::confess "not an ARRAY: " . Dumper($data) unless (reftype($data) eq 'ARRAY');
my $type = 'bindings';
my $index = 0;
my $stream = sub {
my $data = $data->[ $index++ ];
unless (defined($data)) {
$index = 0;
}
return $data;
};
my $self = $class->SUPER::new( $stream, $names, %args );
$self->{_data} = $data;
$self->{_index} = \$index;
return $self;
}
=item C<< reset >>
Returns the iterator to its starting position.
=cut
sub reset {
my $self = shift;
${ $self->{_index} } = 0;
}
=item C<< next >>
Returns the next item in the iterator.
=cut
sub next {
my $self = shift;
my $data = $self->SUPER::next;
unless (defined($data)) {
$self->{_finished} = 0;
}
return $data;
}
=item C<< length >>
Returns the number of elements in the iterator.
=cut
sub length {
my $self = shift;
return scalar(@{ $self->{ _data } });
}
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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