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# Copyright (c) 1997-2020
# 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::Schema;
sub rename_ref_keys {
my ($src, $toMongo) = @_;
if (is_hash($src)) {
my %result;
while (my ($key, $value) = each %$src) {
my $new_key = $toMongo ? $key =~ s/^[\$]/__/r : $key =~ s/^__/\$/r;
$result{$new_key} = ref($value) ? rename_ref_keys($value, $toMongo) : $value;
}\%result
} else {
[ map { ref($_) ? rename_ref_keys($_, $toMongo) : $_ } @$src ]
}
}
# Mongo misinterprets document keys '$ref' as DBrefs
sub schema2document {
my ($schema) = @_;
rename_ref_keys($schema, true);
}
sub document2schema {
my ($schema) = @_;
rename_ref_keys($schema, false);
}
1;
# Local Variables:
# mode: perl
# cperl-indent-level:3
# indent-tabs-mode:nil
# End:
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