code: package org.godhuli.rhipe;
  
  import org.godhuli.rhipe.REXPProtos.REXP;
  
  public class RHNull extends RHBytesWritable {
  
      private static byte[] _nullbytes = null;
      private static REXP.Builder returnvalue;
  
      private static void checkBytes() {
          if (_nullbytes == null) {
              returnvalue = REXP.newBuilder();
              returnvalue.setRclass(REXP.RClass.NULLTYPE);
              _nullbytes = returnvalue.build().toByteArray();
          }
      }
  
      public static byte[] getRawBytes() {
          checkBytes();
          return _nullbytes;
      }
  
      public static REXP.Builder getBuilt() {
          checkBytes();
          return returnvalue;
      }
  
      public RHNull() {
          super();
  
          checkBytes();
          set(_nullbytes);
      }
  }
  