/**
* The sum of squared weights of contained query clauses.
*
* @return float
*/
public function sumOfSquaredWeights()
{
// compute idf
$this->_idf = $this->_reader->getSimilarity()->idf($this->_term, $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)
{
// incorporate boost
$queryNorm *= $this->_query->getBoost();
foreach ($this->_weights as $weight) {
$weight->normalize($queryNorm);
}
}
/**
* Transform entry to a subquery
*
* @param string $encoding
* @return \ZendSearch\Lucene\Search\Query\AbstractQuery
*/
public function getQuery($encoding)
{
$this->_query->setBoost($this->_boost);
return $this->_query;
}