/** * Get query parser instance * * @return Zend_Search_Lucene_Search_QueryParser */ private static function _getInstance() { if (self::$_instance === null) { self::$_instance = new self(); } return self::$_instance; }
/** * Parses a query string * * @param string $strQuery * @param string $encoding * @return Zend_Search_Lucene_Search_Query * @throws Zend_Search_Lucene_Search_QueryParserException */ public static function parse($strQuery, $encoding = null) { if (self::$_instance === null) { self::$_instance = new Zend_Search_Lucene_Search_QueryParser(); } self::$_instance->_encoding = $encoding !== null ? $encoding : self::$_instance->_defaultEncoding; self::$_instance->_lastToken = null; self::$_instance->_context = new Zend_Search_Lucene_Search_QueryParserContext(self::$_instance->_encoding); self::$_instance->_contextStack = array(); self::$_instance->_tokens = self::$_instance->_lexer->tokenize($strQuery, self::$_instance->_encoding); // Empty query if (count(self::$_instance->_tokens) == 0) { return new Zend_Search_Lucene_Search_Query_Empty(); } foreach (self::$_instance->_tokens as $token) { try { self::$_instance->_currentToken = $token; self::$_instance->process($token->type); self::$_instance->_lastToken = $token; } catch (Exception $e) { if (strpos($e->getMessage(), 'There is no any rule for') !== false) { throw new Zend_Search_Lucene_Search_QueryParserException('Syntax error at char position ' . $token->position . '.'); } throw $e; } } if (count(self::$_instance->_contextStack) != 0) { throw new Zend_Search_Lucene_Search_QueryParserException('Syntax Error: mismatched parentheses, every opening must have closing.'); } return self::$_instance->_context->getQuery(); }