private MappingFileReader createMappingFileReader() throws ParserConfigurationException, SAXException, IOException{
SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
Map<String, ElementMapper<?>> elementMappers = new HashMap<String, ElementMapper<?>>();
elementMappers.put(MappingFileReader.ANNOTATION, new AnnotationMapper());
elementMappers.put(MappingFileReader.FILTER, new FilterMapper());
elementMappers.put(MappingFileReader.FIELD, new FieldMapper());
elementMappers.put(MappingFileReader.FEATURE, new FeatureMapper());
return new MappingFileReader(parser, elementMappers);
}