io.spine.server.entity

Interface RepositoryView<I,E extends Entity<I,?>>

Type Parameters:

I - the type of IDs of entities

E - the type of entities

All Known Implementing Classes:

AggregatePartRepository, AggregateRepository, DefaultRecordBasedRepository, EventDispatchingRepository, ProcessManagerRepository, ProjectionRepository, RecordBasedRepository, Repository, TenantRepository

public interface RepositoryView<I,E extends Entity<I,?>>

A view on a repository.

A Repository may have a view that provides a different set of entities. For example, there can be views that represent inactive entities (e.g. archived or deleted).

Repository itself is also a RepositoryView, which loads only active entities.

Method Summary

Modifier and Type	Method and Description
java.util.Optional<E>	find(I id) Finds an entity with the passed ID.
java.util.Iterator<E>	iterator(java.util.function.Predicate<E> filter) Returns an iterator over the entities exposed by the view that match the passed filter.

Method Detail

find

java.util.Optional<E> find(I id)

Finds an entity with the passed ID.

Parameters:

id - the ID of the entity to load

Returns:

the entity or Optional.empty() if there's no entity with such ID

iterator

java.util.Iterator<E> iterator(java.util.function.Predicate<E> filter)

Returns an iterator over the entities exposed by the view that match the passed filter.

Parameters:

filter - the Predicate.test(Object) filtering} predicate

Returns:

new iterator