mailgun-php/Mailgun/Guzzle/Service/Resource/MapResourceIteratorFactory.php

<?php

namespace Guzzle\Service\Resource;

use Guzzle\Service\Command\CommandInterface;

/**
 * Resource iterator factory used when explicitly mapping strings to iterator classes
 */
class MapResourceIteratorFactory extends AbstractResourceIteratorFactory
{
    /** @var array Associative array mapping iterator names to class names */
    protected $map;

    /** @param array $map Associative array mapping iterator names to class names */
    public function __construct(array $map)
    {
        $this->map = $map;
    }

    public function getClassName(CommandInterface $command)
    {
        $className = $command->getName();

        if (isset($this->map[$className])) {
            return $this->map[$className];
        } elseif (isset($this->map['*'])) {
            // If a wildcard was added, then always use that
            return $this->map['*'];
        }

        return null;
    }
}