public static function getInstance()
{
if (is_null(self::$instance)) {
self::$instance = new self();
}
return self::$instance;
}
private function evaluateAdditionalPathAttribute($rdef, $alias, $value)
{
$xpath = $this->getXPathForAlias($alias, $rdef);
$json = $this->getJSONForAlias($alias, $rdef);
$property = $this->getPropertyForAlias($alias, $rdef);
if ($xpath != null) {
$newValue = array();
foreach ($value as $v) {
$xpathProcessor = new XPathProcessor($v);
$newValue = array_merge($newValue, $xpathProcessor->evaluateQuery($xpath));
}
$value = $newValue;
} else {
if ($json != null) {
$newValue = array();
foreach ($value as $v) {
$jsonProcessor = new JSONProcessor();
$xmlString = $jsonProcessor->convertJSON2XML($v);
$xpathProcessor = new XPathProcessor($xmlString);
$newValue = array_merge($newValue, $xpathProcessor->evaluateQuery($json));
}
$value = $newValue;
} else {
if ($property != null) {
$value = SMWRDFProcessor::getInstance()->preprocessProperty($property);
}
}
}
return $value;
}