/**
* @note Before 2.5, toArray was used to generate the content, as of 2.5
* only parameters that influence the result of an query is included.
*
* @since 2.1
*
* @return string
*/
public function getHash()
{
// FIXME 3.0 Leave the hash unchanged to avoid unnecessary BC issues in
// case the cache is not used.
if ($GLOBALS['smwgQueryResultCacheType'] === false || $GLOBALS['smwgQueryResultCacheType'] === CACHE_NONE || $GLOBALS['smwgQueryResultCacheType'] === 'hash') {
return HashBuilder::createFromArray($this->toArray());
}
// For an optimal (less fragmentation) use of the cache, only use
// elements that directly influence the result list
$serialized = array();
$serialized['conditions'] = $this->getQueryString();
$serialized['parameters'] = array('limit' => $this->limit, 'offset' => $this->offset, 'sortkeys' => $this->sortkeys, 'querymode' => $this->querymode);
if ($this->querySource !== null && $this->querySource !== '') {
$serialized['parameters']['source'] = $this->querySource;
}
// printouts are avoided as part of the hash as they not influence the
// match process and are only resolved after the query result has been
// retrieved
return HashBuilder::createFromArray($serialized);
}
