Viewing file: StopWords.php (3.5 KB) -rw-rw-rw- Select action/file-type: (+) | (+) | (+) | Code (+) | Session (+) | (+) | SDB (+) | (+) | (+) | (+) | (+) | (+) |
<?php /** * Zend Framework * * LICENSE * * This source file is subject to the new BSD license that is bundled * with this package in the file LICENSE.txt. * It is also available through the world-wide-web at this URL: * http://framework.zend.com/license/new-bsd * If you did not receive a copy of the license and are unable to * obtain it through the world-wide-web, please send an email * to license@zend.com so we can send you a copy immediately. * * @category Zend * @package Zend_Search_Lucene * @subpackage Analysis * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com) * @license http://framework.zend.com/license/new-bsd New BSD License * @version $Id: StopWords.php 16971 2009-07-22 18:05:45Z mikaelkael $ */
/** Zend_Search_Lucene_Analysis_TokenFilter */ require_once 'Zend/Search/Lucene/Analysis/TokenFilter.php';
/** * Token filter that removes stop words. These words must be provided as array (set), example: * $stopwords = array('the' => 1, 'an' => '1'); * * We do recommend to provide all words in lowercase and concatenate this class after the lowercase filter. * * @category Zend * @package Zend_Search_Lucene * @subpackage Analysis * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com) * @license http://framework.zend.com/license/new-bsd New BSD License */
class Zend_Search_Lucene_Analysis_TokenFilter_StopWords extends Zend_Search_Lucene_Analysis_TokenFilter { /** * Stop Words * @var array */ private $_stopSet;
/** * Constructs new instance of this filter. * * @param array $stopwords array (set) of words that will be filtered out */ public function __construct($stopwords = array()) { $this->_stopSet = array_flip($stopwords); }
/** * Normalize Token or remove it (if null is returned) * * @param Zend_Search_Lucene_Analysis_Token $srcToken * @return Zend_Search_Lucene_Analysis_Token */ public function normalize(Zend_Search_Lucene_Analysis_Token $srcToken) { if (array_key_exists($srcToken->getTermText(), $this->_stopSet)) { return null; } else { return $srcToken; } }
/** * Fills stopwords set from a text file. Each line contains one stopword, lines with '#' in the first * column are ignored (as comments). * * You can call this method one or more times. New stopwords are always added to current set. * * @param string $filepath full path for text file with stopwords * @throws Zend_Search_Exception When the file doesn`t exists or is not readable. */ public function loadFromFile($filepath = null) { if (! $filepath || ! file_exists($filepath)) { require_once 'Zend/Search/Lucene/Exception.php'; throw new Zend_Search_Lucene_Exception('You have to provide valid file path'); } $fd = fopen($filepath, "r"); if (! $fd) { require_once 'Zend/Search/Lucene/Exception.php'; throw new Zend_Search_Lucene_Exception('Cannot open file ' . $filepath); } while (!feof ($fd)) { $buffer = trim(fgets($fd)); if (strlen($buffer) > 0 && $buffer[0] != '#') { $this->_stopSet[$buffer] = 1; } } if (!fclose($fd)) { require_once 'Zend/Search/Lucene/Exception.php'; throw new Zend_Search_Lucene_Exception('Cannot close file ' . $filepath); } } }
|