예제 #1
0
    /**
     * Score calculator for non conjunction queries (not all terms are required)
     *
     * @param integer $docId
     * @param \Zend\Search\Lucene\SearchIndexInterface $reader
     * @return float
     */
    public function _nonConjunctionScore($docId, $reader)
    {
        if ($this->_coord === null) {
            $this->_coord = array();

            $maxCoord = 0;
            foreach ($this->_signs as $sign) {
                if ($sign !== false /* not prohibited */) {
                    $maxCoord++;
                }
            }

            for ($count = 0; $count <= $maxCoord; $count++) {
                $this->_coord[$count] = $reader->getSimilarity()->coord($count, $maxCoord);
            }
        }

        $score = 0.0;
        $matchedTerms = 0;
        foreach ($this->_terms as $termId=>$term) {
            // Check if term is
            if ($this->_signs[$termId] !== false &&        // not prohibited
                isset($this->_termsFreqs[$termId][$docId]) // matched
               ) {
                $matchedTerms++;

                /**
                 * We don't need to check that term freq is not 0
                 * Score calculation is performed only for matched docs
                 */
                $score +=
                      $reader->getSimilarity()->tf($this->_termsFreqs[$termId][$docId]) *
                      $this->_weights[$termId]->getValue() *
                      $reader->norm($docId, $term->field);
            }
        }

        return $score * $this->_coord[$matchedTerms] * $this->getBoost();
    }
예제 #2
0
파일: Term.php 프로젝트: rikaix/zf2
 /**
  * Score specified document
  *
  * @param integer $docId
  * @param \Zend\Search\Lucene\SearchIndexInterface $reader
  * @return float
  */
 public function score($docId, Lucene\SearchIndexInterface $reader)
 {
     if (isset($this->_docVector[$docId])) {
         return $reader->getSimilarity()->tf($this->_termFreqs[$docId]) * $this->_weight->getValue() * $reader->norm($docId, $this->_term->field) * $this->getBoost();
     } else {
         return 0;
     }
 }