/**
* Transforms a generic Query object into an Elastic Search query DSL
*
* @param Query $query
*/
public function mapQuery(Query $query)
{
$arguments = array();
$map = new Boolean();
if ($query->hasQueryString()) {
Lucene::setDefaultSearchField($query->getQueryString()->getDefaultField());
QueryParser::setDefaultOperator($query->getQueryString()->getDefaultOperator() == Query::OPERATOR_AND ? QueryParser::B_AND : QueryParser::B_OR);
$keyword = $query->getQueryString()->getQuery();
if ("*" === $keyword) {
$subQuery = new Wildcard(new Term($keyword));
$subQuery->setMinPrefixLength(0);
} else {
$subQuery = QueryParser::parse($keyword);
}
$map->addSubquery($subQuery, true);
}
$arguments[] = $map;
foreach ($query->getSort() as $sort) {
$arguments[] = key($sort);
$arguments[] = SORT_REGULAR;
$arguments[] = current($sort) == 'asc' ? SORT_ASC : SORT_DESC;
}
return $arguments;
}
/**
* Parses a query string
*
* @param string $strQuery
* @param string $encoding
* @throws \Zend\Search\Lucene\Search\Exception\QueryParserException
* @throws \Zend\Search\Lucene\Exception\RuntimeException
* @return \Zend\Search\Lucene\Search\Query\AbstractQuery
*/
public static function parse($strQuery, $encoding = null)
{
self::_getInstance();
// Reset FSM if previous parse operation didn't return it into a correct state
self::$_instance->reset();
try {
self::$_instance->_encoding = ($encoding !== null) ? $encoding : self::$_instance->_defaultEncoding;
self::$_instance->_lastToken = null;
self::$_instance->_context = new QueryParserContext(self::$_instance->_encoding);
self::$_instance->_contextStack = array();
self::$_instance->_tokens = self::$_instance->_lexer->tokenize($strQuery, self::$_instance->_encoding);
// Empty query
if (count(self::$_instance->_tokens) == 0) {
return new Query\Insignificant();
}
foreach (self::$_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 QueryParserException( 'Syntax error at char position ' . $token->position . '.', 0, $e);
}
throw new RuntimeException($e->getMessage(), $e->getCode(), $e);
}
}
if (count(self::$_instance->_contextStack) != 0) {
throw new QueryParserException('Syntax Error: mismatched parentheses, every opening must have closing.' );
}
return self::$_instance->_context->getQuery();
} catch (QueryParserException $e) {
if (self::$_instance->_suppressQueryParsingExceptions) {
$queryTokens = Analyzer\Analyzer::getDefault()->tokenize($strQuery, self::$_instance->_encoding);
$query = new Query\MultiTerm();
$termsSign = (self::$_instance->_defaultOperator == self::B_AND) ? true /* required term */ :
null /* optional term */;
foreach ($queryTokens as $token) {
$query->addTerm(new Index\Term($token->getTermText()), $termsSign);
}
return $query;
} else {
throw new RuntimeException($e->getMessage(), $e->getCode(), $e);
}
}
}
public function testBooleanQueryWithNonExistingPhraseSubquery()
{
$index = Lucene\Lucene::open(dirname(__FILE__) . '/_index23Sample/_files');
$query = Search\QueryParser::parse('"Non-existing phrase" AND Home');
$this->assertEquals($query->__toString(), '+("Non-existing phrase") +(Home)');
$this->assertEquals($query->rewrite($index)->__toString(), '+((pathkeyword:"non existing phrase") (path:"non existing phrase") (modified:"non existing phrase") (contents:"non existing phrase")) +(pathkeyword:home path:home modified:home contents:home)');
$this->assertEquals($query->rewrite($index)->optimize($index)->__toString(), '<EmptyQuery>');
}
/**
* Generate 'signs style' query from the context
* '+term1 term2 -term3 +(<subquery1>) ...'
*
* @return \Zend\Search\Lucene\Search\Query\AbstractQuery
*/
public function _signStyleExpressionQuery()
{
$query = new Query\Boolean();
if (QueryParser::getDefaultOperator() == QueryParser::B_AND) {
$defaultSign = true;
// required
} else {
$defaultSign = null;
// optional
}
foreach ($this->_entries as $entryId => $entry) {
$sign = $this->_signs[$entryId] !== null ? $this->_signs[$entryId] : $defaultSign;
$query->addSubquery($entry->getQuery($this->_encoding), $sign);
}
return $query;
}
public function testHighlightRangeNonInclusive()
{
$query = Search\QueryParser::parse('{business TO by}');
$html = '<HTML>' . '<HEAD><TITLE>Page title</TITLE></HEAD>' . '<BODY>' . 'Test of text using range query. ' . 'It has to match "buss" and "but" words, but has to skip "business", "by" and "bus"' . '</BODY>' . '</HTML>';
$highlightedHTML = $query->highlightMatches($html);
$this->assertTrue(strpos($highlightedHTML, '<b style="color:black;background-color:#66ffff">buss</b>') !== false);
$this->assertTrue(strpos($highlightedHTML, '<b style="color:black;background-color:#66ffff">but</b>') !== false);
// Check that "bus" word is skipped
$this->assertTrue(strpos($highlightedHTML, 'has to skip "business", "by" and "bus"') !== false);
}
/**
* Performs a query against the index and returns an array
* of Zend_Search_Lucene_Search_QueryHit objects.
* Input is a string or Zend_Search_Lucene_Search_Query.
*
* @param \Zend\Search\Lucene\Search\QueryParser|string $query
* @return array \Zend\Search\Lucene\Search\QueryHit
* @throws \Zend\Search\Lucene\Exception\InvalidArgumentException
* @throws \Zend\Search\Lucene\Exception\RuntimeException
*/
public function find($query)
{
if (is_string($query)) {
$query = Search\QueryParser::parse($query);
}
if (!$query instanceof Search\Query\AbstractQuery) {
throw new InvalidArgumentException('Query must be a string or Zend\Search\Lucene\Search\Query object');
}
$this->commit();
$hits = array();
$scores = array();
$ids = array();
$query = $query->rewrite($this)->optimize($this);
$query->execute($this);
$topScore = 0;
$resultSetLimit = Lucene::getResultSetLimit();
foreach ($query->matchedDocs() as $id => $num) {
$docScore = $query->score($id, $this);
if( $docScore != 0 ) {
$hit = new Search\QueryHit($this);
$hit->id = $id;
$hit->score = $docScore;
$hits[] = $hit;
$ids[] = $id;
$scores[] = $docScore;
if ($docScore > $topScore) {
$topScore = $docScore;
}
}
if ($resultSetLimit != 0 && count($hits) >= $resultSetLimit) {
break;
}
}
if (count($hits) == 0) {
// skip sorting, which may cause a error on empty index
return array();
}
if ($topScore > 1) {
foreach ($hits as $hit) {
$hit->score /= $topScore;
}
}
if (func_num_args() == 1) {
// sort by scores
array_multisort($scores, SORT_DESC, SORT_NUMERIC,
$ids, SORT_ASC, SORT_NUMERIC,
$hits);
} else {
// sort by given field names
$argList = func_get_args();
$fieldNames = $this->getFieldNames();
$sortArgs = array();
// PHP 5.3 now expects all arguments to array_multisort be passed by
// reference (if it's invoked through call_user_func_array());
// since constants can't be passed by reference, create some placeholder variables.
$sortReg = SORT_REGULAR;
$sortAsc = SORT_ASC;
$sortNum = SORT_NUMERIC;
$sortFieldValues = array();
for ($count = 1; $count < count($argList); $count++) {
$fieldName = $argList[$count];
if (!is_string($fieldName)) {
throw new RuntimeException('Field name must be a string.');
}
if (strtolower($fieldName) == 'score') {
$sortArgs[] = &$scores;
} else {
if (!in_array($fieldName, $fieldNames)) {
throw new RuntimeException('Wrong field name.');
}
if (!isset($sortFieldValues[$fieldName])) {
$valuesArray = array();
foreach ($hits as $hit) {
try {
$value = $hit->getDocument()->getFieldValue($fieldName);
} catch (\Exception $e) {
if (strpos($e->getMessage(), 'not found') === false) {
throw new RuntimeException($e->getMessage(), $e->getCode(), $e);
} else {
$value = null;
}
}
$valuesArray[] = $value;
}
// Collect loaded values in $sortFieldValues
// Required for PHP 5.3 which translates references into values when source
// variable is destroyed
$sortFieldValues[$fieldName] = $valuesArray;
}
$sortArgs[] = &$sortFieldValues[$fieldName];
}
if ($count + 1 < count($argList) && is_integer($argList[$count+1])) {
$count++;
$sortArgs[] = &$argList[$count];
if ($count + 1 < count($argList) && is_integer($argList[$count+1])) {
$count++;
$sortArgs[] = &$argList[$count];
} else {
if ($argList[$count] == SORT_ASC || $argList[$count] == SORT_DESC) {
$sortArgs[] = &$sortReg;
} else {
$sortArgs[] = &$sortAsc;
}
}
} else {
$sortArgs[] = &$sortAsc;
$sortArgs[] = &$sortReg;
}
}
// Sort by id's if values are equal
$sortArgs[] = &$ids;
$sortArgs[] = &$sortAsc;
$sortArgs[] = &$sortNum;
// Array to be sorted
$sortArgs[] = &$hits;
// Do sort
call_user_func_array('array_multisort', $sortArgs);
}
return $hits;
}
/**
* default (omitted) + NOT operator processing
*/
public function emptyNotOperatorAction()
{
if (QueryParser::getDefaultOperator() == QueryParser::B_AND) {
// Do nothing
} else {
$this->orOperatorAction();
}
// Process NOT operator
$this->notOperatorAction();
}
