The com.hazelcast.projection.Projections class provides two built-in Projections:
- singleAttribute
- multiAttribute
The singleAttribute Projection enables extracting a single attribute from an object (via reflection). For example, Projection.singleAttribute("address.city") will extract the address.city attribute from the object passed to the Projection.
The multiAttribute Projection enables extracting multiples attributes from an object (via reflection). For example, Projection.multiAttribute("address.city", "postalAddress.city") will extract both attributes from the object passed to the Projection and return them in an Object[] array.