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Merge pull request #1017 from realityking/stemmer2
Add JLanguageStemmer. Add unit tests for JLanguage.
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<?php | ||
/** | ||
* @package Joomla.Platform | ||
* @subpackage Language | ||
* | ||
* @copyright Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved. | ||
* @license GNU General Public License version 2 or later; see LICENSE | ||
*/ | ||
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defined('JPATH_PLATFORM') or die; | ||
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/** | ||
* Stemmer base class. | ||
* | ||
* @package Joomla.Platform | ||
* @subpackage Language | ||
* @since 12.1 | ||
*/ | ||
abstract class JLanguageStemmer | ||
{ | ||
/** | ||
* An internal cache of stemmed tokens. | ||
* | ||
* @var array | ||
* @since 12.1 | ||
*/ | ||
protected $cache = array(); | ||
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/** | ||
* @var array JLanguageStemmer instances. | ||
* @since 12.1 | ||
*/ | ||
protected static $instances = array(); | ||
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/** | ||
* Method to get a stemmer, creating it if necessary. | ||
* | ||
* @param string $adapter The type of stemmer to load. | ||
* | ||
* @return JLanguageStemmer A JLanguageStemmer instance. | ||
* | ||
* @since 12.1 | ||
* @throws RuntimeException on invalid stemmer. | ||
*/ | ||
public static function getInstance($adapter) | ||
{ | ||
// Only create one stemmer for each adapter. | ||
if (isset(self::$instances[$adapter])) | ||
{ | ||
return self::$instances[$adapter]; | ||
} | ||
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// Setup the adapter for the stemmer. | ||
$class = 'JLanguageStemmer' . ucfirst(trim($adapter)); | ||
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// Check if a stemmer exists for the adapter. | ||
if (!class_exists($class)) | ||
{ | ||
// Throw invalid adapter exception. | ||
throw new RuntimeException(JText::sprintf('JLIB_STEMMER_INVALID_STEMMER', $adapter)); | ||
} | ||
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self::$instances[$adapter] = new $class; | ||
return self::$instances[$adapter]; | ||
} | ||
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/** | ||
* Method to stem a token and return the root. | ||
* | ||
* @param string $token The token to stem. | ||
* @param string $lang The language of the token. | ||
* | ||
* @return string The root token. | ||
* | ||
* @since 12.1 | ||
*/ | ||
abstract public function stem($token, $lang); | ||
} |
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