private Element executeRequest(Element requestElem) {
ByteArrayOutputStream resBuf = new ByteArrayOutputStream();
XmlaRequest request =
new DefaultXmlaRequest(requestElem, null, null, null, null);
XmlaResponse response =
new DefaultXmlaResponse(
resBuf, "UTF-8", Enumeration.ResponseMimeType.SOAP);
handler.process(request, response);
return XmlaUtil.stream2Element(
new ByteArrayInputStream(resBuf.toByteArray()));