File Content: MultiTerm.php <?php /** * Zend Framework (http://framework.zend.com/) * * @link http://github.com/zendframework/zf2 for the canonical source repository * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com) * @license http://framework.zend.com/license/new-bsd New BSD License * @package Zend_Search */ namespace ZendSearch\Lucene\Search\Weight; use ZendSearch\Lucene; use ZendSearch\Lucene\Search\Query; /** * @category Zend * @package Zend_Search_Lucene * @subpackage Search */ class MultiTerm extends AbstractWeight { /** * IndexReader. * * @var \ZendSearch\Lucene\SearchIndexInterface */ private $_reader; /** * The query that this concerns. * * @var \ZendSearch\Lucene\Search\Query\AbstractQuery */ private $_query; /** * Query terms weights * Array of Zend_Search_Lucene_Search_Weight_Term * * @var array */ private $_weights; /** * Zend_Search_Lucene_Search_Weight_MultiTerm constructor * query - the query that this concerns. * reader - index reader * * @param \ZendSearch\Lucene\Search\Query\AbstractQuery $query * @param \ZendSearch\Lucene\SearchIndexInterface $reader */ public function __construct(Query\AbstractQuery $query, Lucene\SearchIndexInterface $reader) { $this->_query = $query; $this->_reader = $reader; $this->_weights = array(); $signs = $query->getSigns(); foreach ($query->getTerms() as $id => $term) { if ($signs === null || $signs[$id] === null || $signs[$id]) { $this->_weights[$id] = new Term($term, $query, $reader); $query->setWeight($id, $this->_weights[$id]); } } } /** * The weight for this query * Standard Weight::$_value is not used for boolean queries * * @return float */ public function getValue() { return $this->_query->getBoost(); } /** * The sum of squared weights of contained query clauses. * * @return float */ public function sumOfSquaredWeights() { $sum = 0; foreach ($this->_weights as $weight) { // sum sub weights $sum += $weight->sumOfSquaredWeights(); } // boost each sub-weight $sum *= $this->_query->getBoost() * $this->_query->getBoost(); // check for empty query (like '-something -another') if ($sum == 0) { $sum = 1.0; } return $sum; } /** * Assigns the query normalization factor to this. * * @param float $queryNorm */ public function normalize($queryNorm) { // incorporate boost $queryNorm *= $this->_query->getBoost(); foreach ($this->_weights as $weight) { $weight->normalize($queryNorm); } } } Submit