Annotation Interface TwiceDBProject

An annotation that causes the annotated field to be projected and to be aggregatable. For example, the following class shows both an indexed field annotated with @TwiceDBIndex and an unindexed field:

     public class Example {
         // projectedIntegers of Examples may be aggregated.
         @TwiceDBProject public Integer projectedInteger;
         // unprojectedIntegers of Examples may not be aggregated.
         public String unprojectedInteger;
     }
 

The following types can be aggregated:

double and Double

float and Float

int and Integer

long and Long