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<?php
namespace Elastica\Connection\Strategy;
use Elastica\Exception\InvalidException;
/**
* Description of CallbackStrategy.
*
* @author chabior
*/
class CallbackStrategy implements StrategyInterface
{
/**
* @var callable
*/
protected $_callback;
/**
* @param callable $callback
*
* @throws \Elastica\Exception\InvalidException
*/
public function __construct($callback)
{
if (!self::isValid($callback)) {
throw new InvalidException(sprintf('Callback should be a callable, %s given!', gettype($callback)));
}
$this->_callback = $callback;
}
/**
* @param array|\Elastica\Connection[] $connections
*
* @return \Elastica\Connection
*/
public function getConnection($connections)
{
return call_user_func_array($this->_callback, array($connections));
}
/**
* @param callable $callback
*
* @return bool
*/
public static function isValid($callback)
{
return is_callable($callback);
}
}
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