/**
* Optimize query in the context of specified index
*
* @param \Zend\Search\Lucene\SearchIndexInterface $index
* @return \Zend\Search\Lucene\Search\Query\AbstractQuery
*/
public function optimize(Lucene\SearchIndexInterface $index)
{
// Check, that index contains specified term
if (!$index->hasTerm($this->_term)) {
return new EmptyResult();
}
return $this;
}
/**
* Optimize query in the context of specified index
*
* @param \Zend\Search\Lucene\SearchIndexInterface $index
* @return \Zend\Search\Lucene\Search\Query\AbstractQuery
*/
public function optimize(Lucene\SearchIndexInterface $index)
{
$terms = $this->_terms;
$signs = $this->_signs;
foreach ($terms as $id => $term) {
if (!$index->hasTerm($term)) {
if ($signs === null || $signs[$id] === true) {
// Term is required
return new EmptyResult();
} else {
// Term is optional or prohibited
// Remove it from terms and signs list
unset($terms[$id]);
unset($signs[$id]);
}
}
}
// Check if all presented terms are prohibited
$allProhibited = true;
if ($signs === null) {
$allProhibited = false;
} else {
foreach ($signs as $sign) {
if ($sign !== false) {
$allProhibited = false;
break;
}
}
}
if ($allProhibited) {
return new EmptyResult();
}
/**
* @todo make an optimization for repeated terms
* (they may have different signs)
*/
if (count($terms) == 1) {
// It's already checked, that it's not a prohibited term
// It's one term query with one required or optional element
$optimizedQuery = new Term(reset($terms));
$optimizedQuery->setBoost($this->getBoost());
return $optimizedQuery;
}
if (count($terms) == 0) {
return new EmptyResult();
}
$optimizedQuery = new MultiTerm($terms, $signs);
$optimizedQuery->setBoost($this->getBoost());
return $optimizedQuery;
}
/**
* Optimize query in the context of specified index
*
* @param \Zend\Search\Lucene\SearchIndexInterface $index
* @return \Zend\Search\Lucene\Search\Query\AbstractQuery
*/
public function optimize(Lucene\SearchIndexInterface $index)
{
// Check, that index contains all phrase terms
foreach ($this->_terms as $term) {
if (!$index->hasTerm($term)) {
return new EmptyResult();
}
}
if (count($this->_terms) == 1) {
// It's one term query
$optimizedQuery = new Term(reset($this->_terms));
$optimizedQuery->setBoost($this->getBoost());
return $optimizedQuery;
}
if (count($this->_terms) == 0) {
return new EmptyResult();
}
return $this;
}
