<?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 Search * @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com) * @license http://framework.zend.com/license/new-bsd New BSD License * @version $Id$ */ /** * Zend_Search_Lucene_Search_Weight */ require_once 'Zend/Search/Lucene/Search/Weight.php'; /** * @category Zend * @package Zend_Search_Lucene * @subpackage Search * @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com) * @license http://framework.zend.com/license/new-bsd New BSD License */ class Zend_Search_Lucene_Search_Weight_Phrase extends Zend_Search_Lucene_Search_Weight { /** * IndexReader. * * @var Zend_Search_Lucene_Interface */ private $_reader; /** * The query that this concerns. * * @var Zend_Search_Lucene_Search_Query_Phrase */ private $_query; /** * Score factor * * @var float */ private $_idf; /** * Zend_Search_Lucene_Search_Weight_Phrase constructor * * @param Zend_Search_Lucene_Search_Query_Phrase $query * @param Zend_Search_Lucene_Interface $reader */ public function __construct(Zend_Search_Lucene_Search_Query_Phrase $query, Zend_Search_Lucene_Interface $reader) { $this->_query = $query; $this->_reader = $reader; } /** * The sum of squared weights of contained query clauses. * * @return float */ public function sumOfSquaredWeights() { // compute idf $this->_idf = $this->_reader->getSimilarity()->idf($this->_query->getTerms(), $this->_reader); // compute query weight $this->_queryWeight = $this->_idf * $this->_query->getBoost(); // square it return $this->_queryWeight * $this->_queryWeight; } /** * Assigns the query normalization factor to this. * * @param float $queryNorm */ public function normalize($queryNorm) { $this->_queryNorm = $queryNorm; // normalize query weight $this->_queryWeight *= $queryNorm; // idf for documents $this->_value = $this->_queryWeight * $this->_idf; } }