1: <?php
 2: /**
 3:  * Sastrawi (https://github.com/sastrawi/sastrawi)
 4:  *
 5:  * @link      http://github.com/sastrawi/sastrawi for the canonical source repository
 6:  * @license   https://github.com/sastrawi/sastrawi/blob/master/LICENSE The MIT License (MIT)
 7:  */
 8: 
 9: namespace Sastrawi\Stemmer;
10: 
11: class CachedStemmer implements StemmerInterface
12: {
13:     protected $cache;
14: 
15:     protected $delegatedStemmer;
16: 
17:     public function __construct(Cache\CacheInterface $cache, StemmerInterface $delegatedStemmer)
18:     {
19:         $this->cache = $cache;
20:         $this->delegatedStemmer = $delegatedStemmer;
21:     }
22: 
23:     public function stem($text)
24:     {
25:         $normalizedText = Filter\TextNormalizer::normalizeText($text);
26: 
27:         $words = explode(' ', $normalizedText);
28:         $stems = array();
29: 
30:         foreach ($words as $word) {
31:             if ($this->cache->has($word)) {
32:                 $stems[] = $this->cache->get($word);
33:             } else {
34:                 $stem = $this->delegatedStemmer->stem($word);
35:                 $this->cache->set($word, $stem);
36:                 $stems[] = $stem;
37:             }
38:         }
39: 
40:         return implode(' ', $stems);
41:     }
42: 
43:     public function getCache()
44:     {
45:         return $this->cache;
46:     }
47: }
48: