110 lines
2.7 KiB
PHP
Executable File
110 lines
2.7 KiB
PHP
Executable File
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Search_Lucene
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* @subpackage Search
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* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Phrase.php 20096 2010-01-06 02:05:09Z bkarwin $
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*/
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/**
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* Zend_Search_Lucene_Search_Weight
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*/
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require_once 'Zend/Search/Lucene/Search/Weight.php';
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/**
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* @category Zend
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* @package Zend_Search_Lucene
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* @subpackage Search
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* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Search_Lucene_Search_Weight_Phrase extends Zend_Search_Lucene_Search_Weight
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{
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/**
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* IndexReader.
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*
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* @var Zend_Search_Lucene_Interface
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*/
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private $_reader;
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/**
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* The query that this concerns.
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*
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* @var Zend_Search_Lucene_Search_Query_Phrase
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*/
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private $_query;
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/**
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* Score factor
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*
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* @var float
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*/
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private $_idf;
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/**
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* Zend_Search_Lucene_Search_Weight_Phrase constructor
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*
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* @param Zend_Search_Lucene_Search_Query_Phrase $query
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* @param Zend_Search_Lucene_Interface $reader
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*/
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public function __construct(Zend_Search_Lucene_Search_Query_Phrase $query,
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Zend_Search_Lucene_Interface $reader
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) {
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$this->_query = $query;
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$this->_reader = $reader;
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}
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/**
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* The sum of squared weights of contained query clauses.
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*
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* @return float
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*/
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public function sumOfSquaredWeights()
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{
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// compute idf
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$this->_idf = $this->_reader->getSimilarity()->idf($this->_query->getTerms(), $this->_reader);
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// compute query weight
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$this->_queryWeight = $this->_idf * $this->_query->getBoost();
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// square it
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return $this->_queryWeight * $this->_queryWeight;
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}
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/**
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* Assigns the query normalization factor to this.
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*
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* @param float $queryNorm
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*/
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public function normalize($queryNorm)
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{
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$this->_queryNorm = $queryNorm;
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// normalize query weight
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$this->_queryWeight *= $queryNorm;
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// idf for documents
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$this->_value = $this->_queryWeight * $this->_idf;
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}
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}
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