io.realm.annotations

Annotation Type Required

@Retention(value=RUNTIME)
 @Target(value=FIELD)
public @interface Required

This annotation will mark the field or the element of a primitive RealmList as not nullable.

When a field of type Boolean, Byte, Short, Integer, Long, Float, Double, String, byte[], Date is annotated with Required, it cannot be set to null.

Fields with primitive types are implicitly required.

When a primitive RealmList (RealmList<String>, RealmList<byte[]>, RealmList<Boolean>, RealmList<Byte>, RealmList<Short>, RealmList<Integer>, RealmList<Long>, RealmList<Float>, RealmList<Double>, RealmList<Date>) is annotated with Required, it cannot contain null values.

The RealmList field itself is required always.

Compiling will fail when fields with other types have Required annotation.