/**
* Re-write query into primitive queries in the context of specified index
*
* @param \Zend\Search\Lucene\SearchIndexInterface $index
* @return \Zend\Search\Lucene\Search\Query\AbstractQuery
*/
public function rewrite(Lucene\SearchIndexInterface $index)
{
// Allow to use wildcards within phrases
// They are either removed by text analyzer or used as a part of keyword for keyword fields
//
// if (strpos($this->_phrase, '?') !== false || strpos($this->_phrase, '*') !== false) {
// require_once 'Zend/Search/Lucene/Search/QueryParserException.php';
// throw new Zend_Search_Lucene_Search_QueryParserException('Wildcards are only allowed in a single terms.');
// }
// Split query into subqueries if field name is not specified
if ($this->_field === null) {
$query = new Query\Boolean();
$query->setBoost($this->getBoost());
if (Lucene\Lucene::getDefaultSearchField() === null) {
$searchFields = $index->getFieldNames(true);
} else {
$searchFields = array(Lucene\Lucene::getDefaultSearchField());
}
foreach ($searchFields as $fieldName) {
$subquery = new Phrase($this->_phrase, $this->_phraseEncoding, $fieldName);
$subquery->setSlop($this->getSlop());
$query->addSubquery($subquery->rewrite($index));
}
$this->_matches = $query->getQueryTerms();
return $query;
}
// Recognize exact term matching (it corresponds to Keyword fields stored in the index)
// encoding is not used since we expect binary matching
$term = new Index\Term($this->_phrase, $this->_field);
if ($index->hasTerm($term)) {
$query = new Query\Term($term);
$query->setBoost($this->getBoost());
$this->_matches = $query->getQueryTerms();
return $query;
}
// tokenize phrase using current analyzer and process it as a phrase query
$tokens = Analyzer::getDefault()->tokenize($this->_phrase, $this->_phraseEncoding);
if (count($tokens) == 0) {
$this->_matches = array();
return new Query\Insignificant();
}
if (count($tokens) == 1) {
$term = new Index\Term($tokens[0]->getTermText(), $this->_field);
$query = new Query\Term($term);
$query->setBoost($this->getBoost());
$this->_matches = $query->getQueryTerms();
return $query;
}
//It's non-trivial phrase query
$position = -1;
$query = new Query\Phrase();
foreach ($tokens as $token) {
$position += $token->getPositionIncrement();
$term = new Index\Term($token->getTermText(), $this->_field);
$query->addTerm($term, $position);
$query->setSlop($this->getSlop());
}
$this->_matches = $query->getQueryTerms();
return $query;
}
/**
* Re-write query into primitive queries in the context of specified index
*
* @param \Zend\Search\Lucene\SearchIndex $index
* @return \Zend\Search\Lucene\Search\Query\AbstractQuery
*/
public function rewrite(Lucene\SearchIndex $index)
{
if (count($this->_terms) == 0) {
return new EmptyResult();
} else if ($this->_terms[0]->field !== null) {
return $this;
} else {
$query = new Boolean();
$query->setBoost($this->getBoost());
foreach ($index->getFieldNames(true) as $fieldName) {
$subquery = new self();
$subquery->setSlop($this->getSlop());
foreach ($this->_terms as $termId => $term) {
$qualifiedTerm = new Index\Term($term->text, $fieldName);
$subquery->addTerm($qualifiedTerm, $this->_offsets[$termId]);
}
$query->addSubquery($subquery);
}
return $query;
}
}
/**
* Re-write query into primitive queries in the context of specified index
*
* @param \Zend\Search\Lucene\SearchIndex $index
* @return \Zend\Search\Lucene\Search\Query\AbstractQuery
*/
public function rewrite(Lucene\SearchIndex $index)
{
if (count($this->_terms) == 0) {
return new EmptyResult();
}
// Check, that all fields are qualified
$allQualified = true;
foreach ($this->_terms as $term) {
if ($term->field === null) {
$allQualified = false;
break;
}
}
if ($allQualified) {
return $this;
} else {
/** transform multiterm query to boolean and apply rewrite() method to subqueries. */
$query = new Boolean();
$query->setBoost($this->getBoost());
foreach ($this->_terms as $termId => $term) {
$subquery = new Term($term);
$query->addSubquery($subquery->rewrite($index), $this->_signs === null ? true : $this->_signs[$termId]);
}
return $query;
}
}
