private <T extends Aggregate> T aggregateOf(
final EventStream stream,
Class<T> clazz,
final Optional<VersionedAggregate<T>> versionedAggregate) {
if (versionedAggregate.isPresent()) {
final VersionedAggregate<T> versionedAggregateValue = versionedAggregate.get();
return defaultAggregateService.applyEvents(
stream.readFrom(versionAfter(versionedAggregateValue)),
versionedAggregateValue.getAggregate());
}
return defaultAggregateService.get(stream, clazz);
}
private <T extends Aggregate> long versionAfter(final VersionedAggregate<T> versionedAggregate) {
return versionedAggregate.getVersionId() + 1L;
}