MappingData data = new MappingData();
data.setSourceExpression(resolveKey("source=\"", "\"", conf));
data.setTargetExpression(resolveKey("target=\"", "\"", conf));
String converter = resolveKey("converter=\"", "\"", conf);
if (converter != null) {
Converter instance = getConverter(converter);
data.setConverter(instance);
}
return data;
}