143 lines
3.6 KiB
PHP
Executable File
143 lines
3.6 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: MultiTerm.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_MultiTerm 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
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*/
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private $_query;
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/**
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* Query terms weights
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* Array of Zend_Search_Lucene_Search_Weight_Term
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*
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* @var array
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*/
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private $_weights;
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/**
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* Zend_Search_Lucene_Search_Weight_MultiTerm constructor
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* query - the query that this concerns.
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* reader - index reader
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*
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* @param Zend_Search_Lucene_Search_Query $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 $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 = $reader;
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$this->_weights = array();
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$signs = $query->getSigns();
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foreach ($query->getTerms() as $id => $term) {
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if ($signs === null || $signs[$id] === null || $signs[$id]) {
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include_once 'Zend/Search/Lucene/Search/Weight/Term.php';
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$this->_weights[$id] = new Zend_Search_Lucene_Search_Weight_Term($term, $query, $reader);
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$query->setWeight($id, $this->_weights[$id]);
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}
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}
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}
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/**
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* The weight for this query
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* Standard Weight::$_value is not used for boolean queries
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*
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* @return float
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*/
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public function getValue()
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{
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return $this->_query->getBoost();
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}
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/**
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* The sum of squared weights of contained query clauses.
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*
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* @return float
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*/
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public function sumOfSquaredWeights()
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{
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$sum = 0;
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foreach ($this->_weights as $weight) {
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// sum sub weights
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$sum += $weight->sumOfSquaredWeights();
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}
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// boost each sub-weight
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$sum *= $this->_query->getBoost() * $this->_query->getBoost();
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// check for empty query (like '-something -another')
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if ($sum == 0) {
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$sum = 1.0;
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}
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return $sum;
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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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// incorporate boost
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$queryNorm *= $this->_query->getBoost();
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foreach ($this->_weights as $weight) {
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$weight->normalize($queryNorm);
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}
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}
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}
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