Your IP : 192.168.165.1
<?php
/*
* Copyright 2015-2017 MongoDB, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
namespace MongoDB\Operation;
use MongoDB\Driver\Exception\RuntimeException as DriverRuntimeException;
use MongoDB\Driver\Server;
use MongoDB\Exception\InvalidArgumentException;
use MongoDB\Exception\UnexpectedValueException;
use MongoDB\Exception\UnsupportedException;
use function array_intersect_key;
/**
* Operation for obtaining an estimated count of documents in a collection
*
* @api
* @see \MongoDB\Collection::estimatedDocumentCount()
* @see http://docs.mongodb.org/manual/reference/command/count/
*/
class EstimatedDocumentCount implements Executable, Explainable
{
/** @var string */
private $databaseName;
/** @var string */
private $collectionName;
/** @var array */
private $options;
/** @var Count */
private $count;
/**
* Constructs a count command.
*
* Supported options:
*
* * maxTimeMS (integer): The maximum amount of time to allow the query to
* run.
*
* * readConcern (MongoDB\Driver\ReadConcern): Read concern.
*
* This is not supported for server versions < 3.2 and will result in an
* exception at execution time if used.
*
* * readPreference (MongoDB\Driver\ReadPreference): Read preference.
*
* * session (MongoDB\Driver\Session): Client session.
*
* Sessions are not supported for server versions < 3.6.
*
* @param string $databaseName Database name
* @param string $collectionName Collection name
* @param array $options Command options
* @throws InvalidArgumentException for parameter/option parsing errors
*/
public function __construct($databaseName, $collectionName, array $options = [])
{
$this->databaseName = (string) $databaseName;
$this->collectionName = (string) $collectionName;
$this->options = array_intersect_key($options, ['maxTimeMS' => 1, 'readConcern' => 1, 'readPreference' => 1, 'session' => 1]);
$this->count = $this->createCount();
}
/**
* Execute the operation.
*
* @see Executable::execute()
* @param Server $server
* @return integer
* @throws UnexpectedValueException if the command response was malformed
* @throws UnsupportedException if collation or read concern is used and unsupported
* @throws DriverRuntimeException for other driver errors (e.g. connection errors)
*/
public function execute(Server $server)
{
return $this->count->execute($server);
}
public function getCommandDocument(Server $server)
{
return $this->count->getCommandDocument($server);
}
/**
* @return Count
*/
private function createCount()
{
return new Count($this->databaseName, $this->collectionName, [], $this->options);
}
}