@Override
  public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations,
    MediaType mediaType) {
    return ProtobufMessageHandler.class.isAssignableFrom(type);
  }
Adapter for hooking up Jersey content processing dispatch to ProtobufMessageHandler interface
capable handlers for decoding protobuf input.
hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/provider/consumer/ProtobufMessageBodyConsumer.java