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# Copyright (c) 1997-2021
# Ewgenij Gawrilow, Michael Joswig, and the polymake team
# Technische Universität Berlin, Germany
# https://polymake.org
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2, or (at your option) any
# later version: http://www.gnu.org/licenses/gpl.txt.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#-------------------------------------------------------------------------------
#
# This file is part of the polymake database interface polyDB.
#
# @author Silke Horn, Andreas Paffenholz
# http://www.mathematik.tu-darmstadt.de/~paffenholz
#
package PolyDB::Cursor;
@ISA = qw( MongoDB::Cursor );
use Try::Tiny;
sub prime {
my ($pkg, $cursor, $postprocess) = @_;
$cursor->immortal(1);
if (defined($postprocess)) {
$cursor->{postprocess} = $postprocess;
}
bless $cursor, $pkg;
}
sub next {
my ($self) = @_;
my $data = try {
$self->SUPER::next
} catch {
die_neatly($_, $self->{_query}->full_name);
};
if (defined($data) && defined(my $postprocess = $self->{postprocess})) {
$postprocess->($data)
} else {
$data
}
}
sub all {
my ($self) = @_;
my $postprocess = $self->{postprocess};
map { defined($postprocess) ? $postprocess->($_) : $_ }
try {
$self->SUPER::all
} catch {
die_neatly($_, $self->{_query});
}
}
sub reset {
my ($self) = @_;
try {
$self->SUPER::reset
} catch {
die_neatly($_, $self->{_query});
}
}
1
# Local Variables:
# mode: perl
# cperl-indent-level:3
# indent-tabs-mode:nil
# End:
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