/**
* Load results of the given print request and result subject. This is only
* done when needed.
*/
protected function loadContent()
{
if ($this->mContent !== false) {
return;
}
wfProfileIn('SMWQueryResult::loadContent (SMW)');
switch ($this->mPrintRequest->getMode()) {
case SMWPrintRequest::PRINT_THIS:
// NOTE: The limit is ignored here.
$this->mContent = array($this->mResult);
break;
case SMWPrintRequest::PRINT_CATS:
// Always recompute cache here to ensure output format is respected.
self::$catCache = $this->mStore->getPropertyValues($this->mResult, new SMWDIProperty('_INST'), $this->getRequestOptions(false));
self::$catCacheObj = $this->mResult->getHash();
$limit = $this->mPrintRequest->getParameter('limit');
$this->mContent = $limit === false ? self::$catCache : array_slice(self::$catCache, 0, $limit);
break;
case SMWPrintRequest::PRINT_PROP:
$propertyValue = $this->mPrintRequest->getData();
if ($propertyValue->isValid()) {
$this->mContent = $this->mStore->getPropertyValues($this->mResult, $propertyValue->getDataItem(), $this->getRequestOptions());
} else {
$this->mContent = array();
}
// Print one component of a multi-valued string.
// Known limitation: the printrequest still is of type _rec, so if printers check
// for this then they will not recognize that it returns some more concrete type.
if ($this->mPrintRequest->getTypeID() == '_rec' && $this->mPrintRequest->getParameter('index') !== false) {
$pos = $this->mPrintRequest->getParameter('index') - 1;
$newcontent = array();
foreach ($this->mContent as $diContainer) {
/* SMWRecordValue */
$recordValue = SMWDataValueFactory::newDataItemValue($diContainer, $propertyValue->getDataItem());
$dataItems = $recordValue->getDataItems();
if (array_key_exists($pos, $dataItems) && !is_null($dataItems[$pos])) {
$newcontent[] = $dataItems[$pos];
}
}
$this->mContent = $newcontent;
}
break;
case SMWPrintRequest::PRINT_CCAT:
///NOTE: The limit is ignored here.
if (self::$catCacheObj != $this->mResult->getHash()) {
self::$catCache = $this->mStore->getPropertyValues($this->mResult, new SMWDIProperty('_INST'));
self::$catCacheObj = $this->mResult->getHash();
}
$found = false;
$prkey = $this->mPrintRequest->getData()->getDBkey();
foreach (self::$catCache as $cat) {
if ($cat->getDBkey() == $prkey) {
$found = true;
break;
}
}
$this->mContent = array(new SMWDIBoolean($found));
break;
default:
$this->mContent = array();
// Unknown print request.
}
reset($this->mContent);
wfProfileOut('SMWQueryResult::loadContent (SMW)');
}
/**
* Rewrite printrequests in the way that subselection are cut down to normal property selections
* in order to display them properly.
*
* @param SMWPrintRequest $pr
* @return SMWPrintRequest
*/
private function rewritePrintrequest($pr)
{
$data = $pr->getData();
$rewritten_prs = $pr;
if ($data instanceof Title) {
// property chain appear as Title
$titleText = $data->getText();
$chain = explode(".", $titleText);
if (count($chain) > 1) {
$newtitle = Title::newFromText($chain[count($chain) - 1], SMW_NS_PROPERTY);
if ($newtitle->exists()) {
$newlabel = $pr->getLabel() != $titleText ? $pr->getLabel() : $newtitle->getText();
$newData = SMWPropertyValue::makeUserProperty($newtitle->getText());
} else {
$newlabel = $pr->getLabel() != $titleText ? $pr->getLabel() : $newtitle->getText();
$newData = $newtitle;
}
$rewritten_prs = new SMWPrintRequest($newtitle->exists() ? SMWPrintRequest::PRINT_PROP : SMWPrintRequest::PRINT_THIS, $newlabel, $newData, $pr->getOutputFormat());
$rewritten_prs->getHash();
}
}
return $rewritten_prs;
}
