Fix hierarchies for draft-enabled

srv/src/main/java/my/bookshop/handlers/hierarchy/HierarchyFallbackHandler.java

@@ -0,0 +1,39 @@
+package my.bookshop.handlers.hierarchy;
+
+import org.springframework.context.annotation.Profile;
+import org.springframework.stereotype.Component;
+
+import com.sap.cds.ql.Select;
+import com.sap.cds.services.cds.CdsReadEventContext;
+import com.sap.cds.services.cds.CqnService;
+import com.sap.cds.services.handler.EventHandler;
+import com.sap.cds.services.handler.annotations.Before;
+import com.sap.cds.services.handler.annotations.ServiceName;
+import com.sap.cds.services.persistence.PersistenceService;
+
+import cds.gen.adminservice.AdminService_;
+import cds.gen.adminservice.GenreHierarchy_;
+
+@Component
+@Profile("default") // non-HANA
+@ServiceName(AdminService_.CDS_NAME)
+/**
+ * Fallback to plain representation
+ */
+public class HierarchyFallbackHandler implements EventHandler {
+
+    private final PersistenceService db;
+
+    HierarchyFallbackHandler(PersistenceService db) {
+        this.db = db;
+    }
+
+    @Before(event = CqnService.EVENT_READ, entity = GenreHierarchy_.CDS_NAME)
+    public void readGenreHierarchy(CdsReadEventContext event) {
+        if (event.getCqn().transformations().size() < 1) {
+            return;
+        }
+        event.setResult(db.run(Select.from(GenreHierarchy_.class)));
+    }
+
+}

srv/src/main/java/my/bookshop/handlers/HierarchyHandler.java → srv/src/main/java/my/bookshop/handlers/hierarchy/HierarchyReadOnlyHandler.java

@@ -1,4 +1,6 @@
-package my.bookshop.handlers;
+package my.bookshop.handlers.hierarchy;
+
+import static cds.gen.catalogservice.CatalogService_.GENRE_HIERARCHY;
 
 import java.util.ArrayDeque;
 import java.util.Comparator;
@@ -21,12 +23,12 @@
 import com.sap.cds.ql.cqn.CqnSelect;
 import com.sap.cds.ql.cqn.CqnValue;
 import com.sap.cds.ql.cqn.Modifier;
-import com.sap.cds.ql.cqn.transformation.CqnTopLevelsTransformation;
 import com.sap.cds.ql.cqn.transformation.CqnAncestorsTransformation;
 import com.sap.cds.ql.cqn.transformation.CqnDescendantsTransformation;
 import com.sap.cds.ql.cqn.transformation.CqnFilterTransformation;
-import com.sap.cds.ql.cqn.transformation.CqnSearchTransformation;
 import com.sap.cds.ql.cqn.transformation.CqnOrderByTransformation;
+import com.sap.cds.ql.cqn.transformation.CqnSearchTransformation;
+import com.sap.cds.ql.cqn.transformation.CqnTopLevelsTransformation;
 import com.sap.cds.ql.cqn.transformation.CqnTransformation;
 import com.sap.cds.services.cds.CdsReadEventContext;
 import com.sap.cds.services.cds.CqnService;
@@ -39,8 +41,6 @@
 import cds.gen.catalogservice.GenreHierarchy;
 import cds.gen.catalogservice.GenreHierarchy_;
 
-import static cds.gen.catalogservice.CatalogService_.GENRE_HIERARCHY;
-
 @Component
 @Profile("default") // non-HANA
 @ServiceName(CatalogService_.CDS_NAME)
@@ -54,11 +54,11 @@
  * The handler is neither functionally complete nor correct for all requests. It
  * is not intended as a blue-print for custom code.
  */
-public class HierarchyHandler implements EventHandler {
+public class HierarchyReadOnlyHandler implements EventHandler {
 
     private final PersistenceService db;
 
-    HierarchyHandler(PersistenceService db) {
+    HierarchyReadOnlyHandler(PersistenceService db) {
         this.db = db;
     }
 

srv/src/test/java/my/bookshop/handlers/HierarchyHandlerSorterTest.java → srv/src/test/java/my/bookshop/handlers/hierarchy/HierarchyHandlerSorterTest.java

@@ -1,11 +1,11 @@
-package my.bookshop.handlers;
+package my.bookshop.handlers.hierarchy;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import java.util.List;
 import org.junit.jupiter.api.Test;
 
 import cds.gen.catalogservice.GenreHierarchy;
-import my.bookshop.handlers.HierarchyHandler.Sorter;
+import my.bookshop.handlers.hierarchy.HierarchyReadOnlyHandler.Sorter;
 
 public class HierarchyHandlerSorterTest {