MODLD-593 (Spike): Retaining admin metadata

src/main/java/org/folio/linked/data/service/resource/ResourceEdgeService.java

@@ -0,0 +1,7 @@
+package org.folio.linked.data.service.resource;
+
+import org.folio.linked.data.model.entity.Resource;
+
+public interface ResourceEdgeService {
+  void copyOutgoingEdges(Resource from, Resource to);
+}

src/main/java/org/folio/linked/data/service/resource/impl/ResourceEdgeServiceImpl.java

@@ -0,0 +1,44 @@
+package org.folio.linked.data.service.resource.impl;
+
+import org.folio.ld.dictionary.PredicateDictionary;
+import org.folio.ld.dictionary.ResourceTypeDictionary;
+import org.folio.linked.data.model.entity.Resource;
+import org.folio.linked.data.model.entity.ResourceEdge;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.Map;
+import java.util.function.Predicate;
+
+@Service
+public class ResourceEdgeServiceImpl {
+
+  // If there are more conditions like this, move them to an inner class or enum
+  private static final Predicate<ResourceEdge> IS_ADMIN_METADATA = edge -> edge.getPredicate().getUri()
+    .equals(PredicateDictionary.ADMIN_METADATA.getUri());
+  private static final Predicate<ResourceEdge> SOME_OTHER_CONDITION = edge -> true; // Dummy condition
+
+  private Map<ResourceTypeDictionary, Predicate<ResourceEdge>> rules;
+
+  public ResourceEdgeServiceImpl() {
+    initializeRules();
+  }
+
+  public void copyOutgoingEdges(Resource from, Resource to) {
+    this.rules.entrySet()
+      .stream()
+      .filter(entry -> from.isOfType(entry.getKey()))
+      .filter(entry -> to.isOfType(entry.getKey()))
+      .map(Map.Entry::getValue)
+      .flatMap(condition -> from.getOutgoingEdges().stream().filter(condition))
+      .map(edge -> new ResourceEdge(to, edge.getTarget(), edge.getPredicate()))
+      .forEach(to::addOutgoingEdge);
+  }
+
+  private void initializeRules() {
+    this.rules = Map.of(
+      ResourceTypeDictionary.WORK, IS_ADMIN_METADATA.or(SOME_OTHER_CONDITION), // Chain more conditions here
+      ResourceTypeDictionary.INSTANCE, IS_ADMIN_METADATA // Chain more conditions here
+    );
+  }
+}

src/main/java/org/folio/linked/data/service/resource/impl/ResourceServiceImpl.java

@@ -37,6 +37,7 @@ public class ResourceServiceImpl implements ResourceService {
   private final FolioMetadataRepository folioMetadataRepo;
   private final RequestProcessingExceptionBuilder exceptionBuilder;
   private final ApplicationEventPublisher applicationEventPublisher;
+  private final ResourceEdgeServiceImpl resourceEdgeService;
 
   @Override
   public ResourceResponseDto createResource(ResourceRequestDto resourceDto) {
@@ -101,6 +102,7 @@ private Resource getResource(Long id) {
   private Resource saveNewResource(ResourceRequestDto resourceDto, Resource old) {
     var mapped = resourceDtoMapper.toEntity(resourceDto);
     metadataService.ensure(mapped, old.getFolioMetadata());
+    resourceEdgeService.copyOutgoingEdges(old, mapped);
     return resourceGraphService.saveMergingGraph(mapped);
   }