String mappingFilePath = (String) getContext().getConfigParameterValue(PARAM_MAPPINGFILE);
try {
MappingFileReader indexMappingFileReader = createMappingFileReader();
File mappingFile = new File(mappingFilePath);
fieldDescriptions = indexMappingFileReader
.readFieldDescriptionsFromFile(mappingFile);
} catch (IOException e) {
throw new ResourceInitializationException(e);
} catch (ParserConfigurationException e) {
throw new ResourceInitializationException(e);