@org.apache.thrift.annotation.Nullable
  public java.lang.Object getFieldValue(_Fields field) {
    switch (field) {
    case FIELD1:
      return getField1();

    case FIELD2:
      return getField2();

    case FIELD3:
      return getField3();

    }
    throw new java.lang.IllegalStateException();
  }
Returns true if field field3 is set (has been assigned a value) and false otherwise
serde/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/serde/test/ThriftTestObj.java