Package com.datastax.oss.driver.api.mapper.annotations

Annotation Type DefaultNullSavingStrategy

  • @Target(TYPE)
@Retention(RUNTIME)
public @interface DefaultNullSavingStrategy
    Annotates a Dao interface to define a default NullSavingStrategy, that will apply to all methods that don't explicitly declare one.

    For example, given this interface: 

     @Dao
 @DefaultNullSavingStrategy(SET_TO_NULL)
 public interface ProductDao {

   @Insert
   void insert(Product product);

   @Update(nullSavingStrategy = DO_NOT_SET)
   void update(Product product);
 }
    • insert(Product) will use SET_TO_NULL (inherited from the DAO's default).
    • update(Product) will use DO_NOT_SET.
    If the DAO interface isn't annotated with DefaultNullSavingStrategy, any method that does not declare its own value defaults to DO_NOT_SET.

    Note that null saving strategies are only relevant for Update, Insert, Query and SetEntity methods.

    • Required Element Summary

      Required Elements 
      Modifier and Type Required Element Description
      NullSavingStrategy value