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# Copyright (c) 1997-2018
# Ewgenij Gawrilow, Michael Joswig (Technische Universitaet Berlin, Germany)
# http://www.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://solros.de
# http://www.mathematik.tu-darmstadt.de/~paffenholz
#
use MongoDB;
use MongoDB::OID;
use PolyDB;
use namespaces qw(+ PolyDB);
CREDIT polyDB
# @topic property_types/MongoClient
# @category Database
# A handler for the polyDB database internally controlling the connection to the MongoDB database
package PolyDB::default;
# @category Database
# polyDB: The hostname of the database, default 'polymake.org'
custom $db_host = "db.polymake.org";
#custom $db_host = "130.83.68.137";
# polyDB: The port of the database, default 27017
custom $db_port = "27027";
# polyDB: The database username, default 'polymake'
custom $db_user = "polymake";
# polyDB: The database password, default 'database'
custom $db_pwd = "database";
# polyDB: The name of the authentication database, default 'admin'
custom $db_auth_db = "admin";
# polyDB: The name of the type database, default 'pm'
custom $db_type_db = "pm";
# polyDB: The name of the info database, default 'pm'
custom $db_info_db_old = "pm";
# polyDB: The name of the info database, default 'pm'
custom $db_info_db = "polyDB";
# polyDB: The name of the type_information collection, default 'type_information'
custom $db_type_information = "type_information";
# polyDB: The name of the Info collection, default 'Info'
custom $db_info_collection = "Info";
# polyDB: The name of the database you want to access. Set this if you want to access a certain database all (or most of) the time.
custom $db_database_name = "";
# polyDB: The name of the collection you want to access. Set this if you want to access a certain collection all (or most of) the time.
custom $db_collection_name = "";
# polyDB: The timeout for waiting to get a socket connection to the db server
custom $db_socket_timeout = 120000;
package application;
# @category Database
# Returns all objects in the database //db// in //collection// that match the //query//. This is only recommended for a reasonably small number of matching objects. If you expect many such objects you should instead use a database cursor.
# @param HASH query
# @option String db name of the database, see [[http://www.polymake.org/doku.php/data|here]] or [[db_info]] for available databases
# @option String collection name of the collection, see [[http://www.polymake.org/doku.php/data|here]] or [[db_info]] for available collections
# @option Bool local set to 1 if you want to use a local database (on localhost), default 0
# @option Int limit limit the number of objects that will be returned (default: no limit)
# @option String username Some databases might have access control.
# @option String password Some databases might have access control.
# @option MongoClient client
# @option Int skip skip the first elements, default: 0
# @option HASH sort_by specify a sorting order
# @return Array<Core::Object>
user_function db_query ($, \
{db => $PolyDB::default::db_database_name, \
collection => $PolyDB::default::db_collection_name, \
representative=>0, \
distinct=>undef, \
local => 0, \
limit => 0, \
username => $PolyDB::default::db_user, \
password => $PolyDB::default::db_pwd, \
client => undef, \
skip => 0, \
sort_by => {"_id" => 1}}) \
{
my ($query, $options) = @_;
Client::check_options($options);
my ($client, $collection) = Client::prepare_query({ db=>$options->{"db"},
collection=>$options->{"collection"},
client=>$options->{"client"} });
my $output;
my $construct_object_function;
if ( $options->{'representative'} ) {
$output = $collection->find_one($query)
// die "No such object in the database.\n";
if ( exists($output->{'polyDB'}->{'type_information_key'}) ) {
my $type_information_key = $output->{'polyDB'}->{'type_information_key'};
my $ti_query = {db => $options->{'db'},
collection => $options->{'collection'},
local => $options->{local},
client => $client,
type_information_key => $type_information_key};
my $type_information = db_get_type_information($ti_query)
// die "Type information not found\n";
if ( defined($type_information->{'construct_object'} ) ) {
$construct_object_function = $type_information->{'construct_object'};
}
}
} elsif( $options->{'distinct'}) {
$output = $client->get_database($options->{'db'})->run_command([
"distinct" => $options->{'collection'},
"key" => $options->{'distinct'},
"query" => $query
]);
} else {
unless ($collection->count($query)) { die "No such object in the database.\n"; }
# get type information keys
my $keys = $client->get_database($options->{'db'})->run_command([
"distinct" => $options->{'collection'},
"key" => "polyDB.type_information_key",
"query" => $query,
"limit" => $options->{'limit'},
"skip" => $options->{'skip'}
]);
$construct_object_function = {};
foreach my $key (@{$keys->{'values'}}) {
my $ti_query = {db => $options->{'db'},
collection => $options->{'collection'},
local => $options->{local},
client => $client,
type_information_key => $key};
my $type_information = db_get_type_information($ti_query)
// die "Type information for key $key not found\n";
if ( defined($type_information->{'construct_object'} ) ) {
$construct_object_function->{$key} = $type_information->{'construct_object'};
}
}
$output = $collection->find($query)->limit($options->{limit})->sort($options->{sort_by})->skip($options->{skip});
}
unless (defined($options->{client})){
undef $client;
}
if ( $options->{'representative'}) {
return PolymakeJsonConversion::perl2polymake($output, $options->{db}, $options->{collection}, $construct_object_function);
} elsif($options->{'distinct'}) {
return $output->{'values'};
} else {
return PolymakeJsonConversion::cursor2ObjectArray($output, $options->{db}, $options->{collection}, $construct_object_function);
}
}
# @category Database
# Returns the number of objects in the database //db// in //collection// that match the //query//.
# @param HASH query
# @option String db name of the database, see [[http://www.polymake.org/doku.php/data|here]] or [[db_info]] for available databases
# @option String collection name of the collection, see [[http://www.polymake.org/doku.php/data|here]] or [[db_info]] for available collections
# @option Bool local set to 1 if you want to use a local database (on localhost), default 0
# @option String username Some databases might have access control.
# @option String password Some databases might have access control.
# @option MongoClient client
# @return Int
user_function db_count($, \
{db => $PolyDB::default::db_database_name, \
collection => $PolyDB::default::db_collection_name, \
distinct=>undef, \
local => 0, \
username => $PolyDB::default::db_user, \
password => $PolyDB::default::db_pwd, \
client => undef}) \
{
my ($query, $options) = @_;
Client::check_options($options);
my ($client, $collection) = Client::prepare_query({ db=>$options->{"db"},
collection=>$options->{"collection"},
client=>$options->{"client"} });
my $output;
if ( $options->{'distinct'} ) {
$output = $client->get_database($options->{'db'})->run_command([
"distinct" => $options->{'collection'},
"key" => $options->{'distinct'},
"query" => $query
])
// die "No such object.\n";
} else {
$output = $collection->count($query);
}
unless (defined($options->{client})){
undef $client;
}
if ( $options->{'distinct'}) {
return scalar(@{$output->{'values'}});
} else {
return $output;
}
}
# @category Database
# Returns the IDs of all objects in the database //db// in //collection// that match the //query//. This is only recommended for a reasonably small number of matching objects. If you expect many such objects you should instead construct a [[DBCursor]].
# @param HASH query
# @option String db name of the database, see [[http://www.polymake.org/doku.php/data|here]] or [[db_info]] for available databases
# @option String collection name of the collection, see [[http://www.polymake.org/doku.php/data|here]] or [[db_info]] for available collections
# @option Bool local set to 1 if you want to use a local database (on localhost), default 0
# @option Int limit limit the number of objects that will be returned (default: no limit)
# @option HASH sort_by specify a sorting order
# @option Int skip skip the first elements, default: 0
# @option String username Some databases might have access control.
# @option String password Some databases might have access control.
# @option MongoClient client
# @return Array<String>
user_function db_ids ($, \
{db => $PolyDB::default::db_database_name, \
collection => $PolyDB::default::db_collection_name, \
local => 0, \
limit => 0, \
username => $PolyDB::default::db_user, \
password => $PolyDB::default::db_pwd, \
client => undef, \
skip => 0, \
sort_by => {}})\
{
my ($query, $options) = @_;
Client::check_options($options);
my ($client, $collection) = Client::prepare_query({ db=>$options->{"db"},
collection=>$options->{"collection"},
client=>$options->{"client"} });
my $output = $collection->find($query)->fields({'_id'=>1})->limit($options->{limit})->sort($options->{sort_by})->skip($options->{skip})
// die "No such object.\n";
return new Array<String>(PolymakeJsonConversion::cursor2IdArray($output));
}
# Local Variables:
# mode: perl
# cperl-indent-level:3
# indent-tabs-mode:nil
# End:
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