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<?php
/**
* This file is part of the Statistical Classifier package.
*
* (c) Cam Spiers <camspiers@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Camspiers\StatisticalClassifier\Normalizer\Token;
use InvalidArgumentException;
/**
* @author Cam Spiers <camspiers@gmail.com>
* @package Statistical Classifier
*/
class Grouped implements NormalizerInterface
{
/**
* An array of normalizers to run
* @var array
*/
protected $normalizers = array();
/**
* Create the normalizer using an array or normalizers as input
* @param mixed $normalizers
* @throws \InvalidArgumentException
*/
public function __construct($normalizers = array())
{
if (!is_array($normalizers)) {
$normalizers = func_get_args();
}
if (count($normalizers) === 0) {
throw new InvalidArgumentException('A group of normalizers must contain at least one normalizer');
}
foreach ($normalizers as $normalizer) {
$this->addNormalizer($normalizer);
}
}
/**
* Add a normalizer to the group
* @param NormalizerInterface $normalizer The normalizer
*/
public function addNormalizer(NormalizerInterface $normalizer)
{
$this->normalizers[] = $normalizer;
}
/**
* @{inheritdoc}
*/
public function normalize(array $tokens)
{
foreach ($this->normalizers as $normalizer) {
$tokens = $normalizer->normalize($tokens);
}
return $tokens;
}
}