} else if ("xcas".equalsIgnoreCase(aSerializerKey)) {
// Default is XCAS
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
serializer.serializeToXCAS(bos, aCAS, null, null, null);
serializedCas = bos.toString();
} catch (Exception e) {
throw e;
} finally {
bos.close();