ClosureCommand.php

<?php
 
namespace Guzzle\Service\Command;
 
use Guzzle\Common\Exception\InvalidArgumentException;
use Guzzle\Common\Exception\UnexpectedValueException;
use Guzzle\Http\Message\RequestInterface;
 
class ClosureCommand extends AbstractCommand
{
    protected function init()
    {
        if (!$this['closure']) {
            throw new InvalidArgumentException('A closure must be passed in the parameters array');
        }
    }
 
    protected function build()
    {
        $closure = $this['closure'];
        $this->request = $closure($this, $this->operation);
 
        if (!$this->request || !$this->request instanceof RequestInterface) {
            throw new UnexpectedValueException('Closure command did not return a RequestInterface object');
        }
    }
}