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<?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 EmptyIterator;
use MongoDB\Driver\Command;
use MongoDB\Driver\Exception\RuntimeException as DriverRuntimeException;
use MongoDB\Driver\Server;
use MongoDB\Driver\Session;
use MongoDB\Exception\InvalidArgumentException;
use MongoDB\Model\CachingIterator;
use MongoDB\Model\IndexInfoIterator;
use MongoDB\Model\IndexInfoIteratorIterator;
use function is_integer;
/**
* Operation for the listIndexes command.
*
* @api
* @see \MongoDB\Collection::listIndexes()
* @see http://docs.mongodb.org/manual/reference/command/listIndexes/
*/
class ListIndexes implements Executable
{
/** @var integer */
private static $errorCodeDatabaseNotFound = 60;
/** @var integer */
private static $errorCodeNamespaceNotFound = 26;
/** @var string */
private $databaseName;
/** @var string */
private $collectionName;
/** @var array */
private $options;
/**
* Constructs a listIndexes command.
*
* Supported options:
*
* * maxTimeMS (integer): The maximum amount of time to allow the query to
* run.
*
* * 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 $options = [])
{
if (isset($options['maxTimeMS']) && ! is_integer($options['maxTimeMS'])) {
throw InvalidArgumentException::invalidType('"maxTimeMS" option', $options['maxTimeMS'], 'integer');
}
if (isset($options['session']) && ! $options['session'] instanceof Session) {
throw InvalidArgumentException::invalidType('"session" option', $options['session'], Session::class);
}
$this->databaseName = (string) $databaseName;
$this->collectionName = (string) $collectionName;
$this->options = $options;
}
/**
* Execute the operation.
*
* @see Executable::execute()
* @param Server $server
* @return IndexInfoIterator
* @throws DriverRuntimeException for other driver errors (e.g. connection errors)
*/
public function execute(Server $server)
{
return $this->executeCommand($server);
}
/**
* Create options for executing the command.
*
* Note: read preference is intentionally omitted, as the spec requires that
* the command be executed on the primary.
*
* @see http://php.net/manual/en/mongodb-driver-server.executecommand.php
* @return array
*/
private function createOptions()
{
$options = [];
if (isset($this->options['session'])) {
$options['session'] = $this->options['session'];
}
return $options;
}
/**
* Returns information for all indexes for this collection using the
* listIndexes command.
*
* @param Server $server
* @return IndexInfoIteratorIterator
* @throws DriverRuntimeException for other driver errors (e.g. connection errors)
*/
private function executeCommand(Server $server)
{
$cmd = ['listIndexes' => $this->collectionName];
if (isset($this->options['maxTimeMS'])) {
$cmd['maxTimeMS'] = $this->options['maxTimeMS'];
}
try {
$cursor = $server->executeReadCommand($this->databaseName, new Command($cmd), $this->createOptions());
} catch (DriverRuntimeException $e) {
/* The server may return an error if the collection does not exist.
* Check for possible error codes (see: SERVER-20463) and return an
* empty iterator instead of throwing.
*/
if ($e->getCode() === self::$errorCodeNamespaceNotFound || $e->getCode() === self::$errorCodeDatabaseNotFound) {
return new IndexInfoIteratorIterator(new EmptyIterator());
}
throw $e;
}
$cursor->setTypeMap(['root' => 'array', 'document' => 'array']);
return new IndexInfoIteratorIterator(new CachingIterator($cursor));
}
}