freq, ...) * * @var array */ private $_termFreqs; /** * Zend_Search_Lucene_Search_Query_Term constructor * * @param Zend_Search_Lucene_Index_Term $term * @param boolean $sign */ public function __construct(Zend_Search_Lucene_Index_Term $term) { $this->_term = $term; } /** * Re-write query into primitive queries in the context of specified index * * @param Zend_Search_Lucene_Interface $index * @return Zend_Search_Lucene_Search_Query */ public function rewrite(Zend_Search_Lucene_Interface $index) { if ($this->_term->field != null) { return $this; } else { #require_once 'Zend/Search/Lucene/Search/Query/MultiTerm.php'; $query = new Zend_Search_Lucene_Search_Query_MultiTerm(); $query->setBoost($this->getBoost()); #require_once 'Zend/Search/Lucene/Index/Term.php'; foreach ($index->getFieldNames(true) as $fieldName) { $term = new Zend_Search_Lucene_Index_Term($this->_term->text, $fieldName); $query->addTerm($term); } return $query->rewrite($index); } } /** * Optimize query in the context of specified index * * @param Zend_Search_Lucene_Interface $index * @return Zend_Search_Lucene_Search_Query */ public function optimize(Zend_Search_Lucene_Interface $index) { // Check, that index contains specified term if (!$index->hasTerm($this->_term)) { #require_once 'Zend/Search/Lucene/Search/Query/Empty.php'; return new Zend_Search_Lucene_Search_Query_Empty(); } return $this; } /** * Constructs an appropriate Weight implementation for this query. * * @param Zend_Search_Lucene_Interface $reader * @return Zend_Search_Lucene_Search_Weight */ public function createWeight(Zend_Search_Lucene_Interface $reader) { #require_once 'Zend/Search/Lucene/Search/Weight/Term.php'; $this->_weight = new Zend_Search_Lucene_Search_Weight_Term($this->_term, $this, $reader); return $this->_weight; } /** * Execute query in context of index reader * It also initializes necessary internal structures * * @param Zend_Search_Lucene_Interface $reader * @param Zend_Search_Lucene_Index_DocsFilter|null $docsFilter */ public function execute(Zend_Search_Lucene_Interface $reader, $docsFilter = null) { $this->_docVector = array_flip($reader->termDocs($this->_term, $docsFilter)); $this->_termFreqs = $reader->termFreqs($this->_term, $docsFilter); // Initialize weight if it's not done yet $this->_initWeight($reader); } /** * Get document ids likely matching the query * * It's an array with document ids as keys (performance considerations) * * @return array */ public function matchedDocs() { return $this->_docVector; } /** * Score specified document * * @param integer $docId * @param Zend_Search_Lucene_Interface $reader * @return float */ public function score($docId, Zend_Search_Lucene_Interface $reader) { if (isset($this->_docVector[$docId])) { return $reader->getSimilarity()->tf($this->_termFreqs[$docId]) * $this->_weight->getValue() * $reader->norm($docId, $this->_term->field) * $this->getBoost(); } else { return 0; } } /** * Return query terms * * @return array */ public function getQueryTerms() { return array($this->_term); } /** * Return query term * * @return Zend_Search_Lucene_Index_Term */ public function getTerm() { return $this->_term; } /** * Query specific matches highlighting * * @param Zend_Search_Lucene_Search_Highlighter_Interface $highlighter Highlighter object (also contains doc for highlighting) */ protected function _highlightMatches(Zend_Search_Lucene_Search_Highlighter_Interface $highlighter) { $highlighter->highlight($this->_term->text); } /** * Print a query * * @return string */ public function __toString() { // It's used only for query visualisation, so we don't care about characters escaping if ($this->_term->field !== null) { $query = $this->_term->field . ':'; } else { $query = ''; } $query .= $this->_term->text; if ($this->getBoost() != 1) { $query = $query . '^' . round($this->getBoost(), 4); } return $query; } }