BatchClosureTransfer.php

<?php
 
namespace Guzzle\Batch;
 
use Guzzle\Common\Exception\InvalidArgumentException;
 
class BatchClosureTransfer implements BatchTransferInterface
{
    protected $callable;
 
    protected $context;
 
    public function __construct($callable, $context = null)
    {
        if (!is_callable($callable)) {
            throw new InvalidArgumentException('Argument must be callable');
        }
 
        $this->callable = $callable;
        $this->context = $context;
    }
 
    public function transfer(array $batch)
    {
        return empty($batch) ? null : call_user_func($this->callable, $batch, $this->context);
    }
}