code: protected void validate(String operationType) throws Exception
  	{
  		super.validate(operationType);
  
  		MPSString id_validator = new MPSString();
  		id_validator.setConstraintIsReq(MPSConstants.DELETE_CONSTRAINT, true);
  		id_validator.setConstraintIsReq(MPSConstants.MODIFY_CONSTRAINT, true);
  		id_validator.validate(operationType, id, "\"id\"");
  		
  		MPSInt last_updated_time_validator = new MPSInt();
  		last_updated_time_validator.validate(operationType, last_updated_time, "\"last_updated_time\"");
  		
  		MPSIPAddress ns_ip_address_validator = new MPSIPAddress();
  		ns_ip_address_validator.validate(operationType, ns_ip_address, "\"ns_ip_address\"");
  		
  		MPSString diff_status_validator = new MPSString();
  		diff_status_validator.validate(operationType, diff_status, "\"diff_status\"");
  		
  		MPSString device_name_validator = new MPSString();
  		device_name_validator.setConstraintMaxStrLen(MPSConstants.GENERIC_CONSTRAINT, 128);
  		device_name_validator.setConstraintMinStrLen(MPSConstants.GENERIC_CONSTRAINT, 1);
  		device_name_validator.validate(operationType, device_name, "\"device_name\"");
  		
  	}
docs: <pre>
  Performs generic data validation for the operation to be performed
  </pre>