+ protected String relatedOwningEntityId(ServiceInstance serviceInstance) {
+ /*
+ For reference, consider the service-instance structure below. Method will null-safely extract the
+ `relationship-value` where `relationship-key` == `owning-entity.owning-entity-id`.
+
+ {
+ "service-instance-id": "5d521981-33be-4bb5-bb20-5616a9c52a5a",
+ ...
+ "relationship-list": {
+ "relationship": [
+ {
+ "related-to": "owning-entity",
+ "related-link": "/aai/v11/business/owning-entities/owning-entity/4d4ecf59-41f1-40d4-818d-885234680a42",
+ "relationship-data": [
+ {
+ "relationship-key": "owning-entity.owning-entity-id",
+ "relationship-value": "4d4ecf59-41f1-40d4-818d-885234680a42"
+ }
+ ]
+ }
+ ]
+ }
+ }
+ */
+
+ Stream<RelationshipData> allRelationships =
+ Optional.ofNullable(serviceInstance.relationshipList)
+ .map(it -> it.getRelationship())
+ .map(it -> it.stream().flatMap(r -> emptyIfNull(r.getRelationDataList()).stream()))
+ .orElse(Stream.empty());
+
+ return allRelationships
+ .filter(r -> StringUtils.equals(r.getRelationshipKey(), OWNING_ENTITY_ID))
+ .map(it -> it.getRelationshipValue())
+ .findAny().orElse(null);
+ }
+