/**
  * Return the raw configuration MapContext.
  *
  * @param key
  * @return
  * @throws JAXBException
  */
 public org.constellation.provider.coveragesgroup.xml.MapContext getRawMapContext(
     final GenericName key) throws JAXBException {
   if (index == null) {
     visit();
   }
   final File mapContextFile = index.get(key);
   return MapContextIO.readRawMapContextFile(mapContextFile);
 }