Removed the handle index (not needed because the uuid index will always be used internally) and all associated code.

src/app/+lookup-by-id/lookup-guard.spec.ts

@@ -1,6 +1,6 @@
 import { LookupGuard } from './lookup-guard';
 import { of as observableOf } from 'rxjs';
-import { IdentifierType } from '../core/index/index.reducer';
+import { IdentifierType } from '../core/data/request.models';
 
 describe('LookupGuard', () => {
   let dsoService: any;

src/app/+lookup-by-id/lookup-guard.ts

@@ -1,6 +1,6 @@
 import { ActivatedRouteSnapshot, CanActivate, Router, RouterStateSnapshot } from '@angular/router';
 import { Injectable } from '@angular/core';
-import { IdentifierType } from '../core/index/index.reducer';
+import { IdentifierType } from '../core/data/request.models';
 import { Observable } from 'rxjs';
 import { map } from 'rxjs/operators';
 import { RemoteData } from '../core/data/remote-data';

src/app/core/cache/object-cache.service.ts

@@ -21,7 +21,6 @@ import {
 import { CacheableObject, ObjectCacheEntry, ObjectCacheState } from './object-cache.reducer';
 import { AddToSSBAction } from './server-sync-buffer.actions';
 import { getMapsToType } from './builders/build-decorators';
-import { IdentifierType } from '../index/index.reducer';
 
 /**
  * The base selector function to select the object cache in the store
@@ -81,10 +80,10 @@ export class ObjectCacheService {
    * @return Observable<NormalizedObject<T>>
    *    An observable of the requested object in normalized form
    */
-  getObjectByID<T extends CacheableObject>(id: string, identifierType: IdentifierType = IdentifierType.UUID):
+  getObjectByID<T extends CacheableObject>(id: string):
     Observable<NormalizedObject<T>> {
     return this.store.pipe(
-      select(selfLinkFromUuidSelector(id, identifierType)),
+      select(selfLinkFromUuidSelector(id)),
       mergeMap((selfLink: string) => this.getObjectBySelfLink(selfLink)
       )
     )
@@ -196,11 +195,11 @@ export class ObjectCacheService {
    *    true if the object with the specified UUID is cached,
    *    false otherwise
    */
-  hasById(id: string, identifierType: IdentifierType = IdentifierType.UUID): boolean {
+  hasById(id: string): boolean {
     let result: boolean;
 
     this.store.pipe(
-      select(selfLinkFromUuidSelector(id, identifierType)),
+      select(selfLinkFromUuidSelector(id)),
       take(1)
     ).subscribe((selfLink: string) => result = this.hasBySelfLink(selfLink));
 

src/app/core/core.effects.ts

@@ -1,5 +1,5 @@
 import { ObjectCacheEffects } from './cache/object-cache.effects';
-import { IdentifierIndexEffects } from './index/index.effects';
+import { UUIDIndexEffects } from './index/index.effects';
 import { RequestEffects } from './data/request.effects';
 import { AuthEffects } from './auth/auth.effects';
 import { JsonPatchOperationsEffects } from './json-patch/json-patch-operations.effects';
@@ -10,7 +10,7 @@ import { RouteEffects } from './services/route.effects';
 export const coreEffects = [
   RequestEffects,
   ObjectCacheEffects,
-  IdentifierIndexEffects,
+  UUIDIndexEffects,
   AuthEffects,
   JsonPatchOperationsEffects,
   ServerSyncBufferEffects,

src/app/core/data/data.service.ts

@@ -37,7 +37,6 @@ import { NormalizedObjectBuildService } from '../cache/builders/normalized-objec
 import { ChangeAnalyzer } from './change-analyzer';
 import { RestRequestMethod } from './rest-request-method';
 import { getMapsToType } from '../cache/builders/build-decorators';
-import { IdentifierType } from '../index/index.reducer';
 
 export abstract class DataService<T extends CacheableObject> {
   protected abstract requestService: RequestService;
@@ -147,19 +146,15 @@ export abstract class DataService<T extends CacheableObject> {
     return `${endpoint}/${resourceID}`;
   }
 
-  findById(id: string, identifierType: IdentifierType = IdentifierType.UUID): Observable<RemoteData<T>> {
-    let hrefObs;
-    if (identifierType === IdentifierType.UUID) {
-      hrefObs = this.halService.getEndpoint(this.linkPath).pipe(
-        map((endpoint: string) => this.getIDHref(endpoint, id)));
-    } else if (identifierType === IdentifierType.HANDLE) {
-      hrefObs = this.halService.getEndpoint(this.linkPath).pipe(
-        map((endpoint: string) => this.getIDHref(endpoint, encodeURIComponent(id))));
-    }
+  findById(id: string): Observable<RemoteData<T>> {
+
+    const hrefObs = this.halService.getEndpoint(this.linkPath).pipe(
+        map((endpoint: string) => this.getIDHref(endpoint, encodeURIComponent(id))))
+
     hrefObs.pipe(
       find((href: string) => hasValue(href)))
       .subscribe((href: string) => {
-        const request = new FindByIDRequest(this.requestService.generateRequestId(), href, id, identifierType);
+        const request = new FindByIDRequest(this.requestService.generateRequestId(), href, id);
         this.requestService.configure(request, this.forceBypassCache);
       });
 

src/app/core/data/dso-redirect-data.service.spec.ts

@@ -2,13 +2,12 @@ import { cold, getTestScheduler } from 'jasmine-marbles';
 import { TestScheduler } from 'rxjs/testing';
 import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
 import { HALEndpointService } from '../shared/hal-endpoint.service';
-import { FindByIDRequest } from './request.models';
+import { FindByIDRequest, IdentifierType } from './request.models';
 import { RequestService } from './request.service';
 import { ObjectCacheService } from '../cache/object-cache.service';
 import { NotificationsService } from '../../shared/notifications/notifications.service';
 import { HttpClient } from '@angular/common/http';
 import { NormalizedObjectBuildService } from '../cache/builders/normalized-object-build.service';
-import { IdentifierType } from '../index/index.reducer';
 import { DsoRedirectDataService } from './dso-redirect-data.service';
 import { Store } from '@ngrx/store';
 import { CoreState } from '../core.reducers';
@@ -111,7 +110,7 @@ describe('DsoRedirectDataService', () => {
       scheduler.schedule(() => service.findById(dsoUUID, IdentifierType.UUID));
       scheduler.flush();
 
-      expect(requestService.configure).toHaveBeenCalledWith(new FindByIDRequest(requestUUID, requestUUIDURL, dsoUUID, IdentifierType.UUID), false);
+      expect(requestService.configure).toHaveBeenCalledWith(new FindByIDRequest(requestUUID, requestUUIDURL, dsoUUID), false);
     });
 
     it('should configure the proper FindByIDRequest for handle', () => {
@@ -119,7 +118,7 @@ describe('DsoRedirectDataService', () => {
       scheduler.schedule(() => service.findById(dsoHandle, IdentifierType.HANDLE));
       scheduler.flush();
 
-      expect(requestService.configure).toHaveBeenCalledWith(new FindByIDRequest(requestUUID, requestHandleURL, dsoHandle, IdentifierType.HANDLE), false);
+      expect(requestService.configure).toHaveBeenCalledWith(new FindByIDRequest(requestUUID, requestHandleURL, dsoHandle), false);
     });
 
     it('should navigate to item route', () => {

src/app/core/data/dso-redirect-data.service.ts

@@ -8,9 +8,8 @@ import { RemoteDataBuildService } from '../cache/builders/remote-data-build.serv
 import { RequestService } from './request.service';
 import { Store } from '@ngrx/store';
 import { CoreState } from '../core.reducers';
-import { FindAllOptions, FindByIDRequest } from './request.models';
+import { FindAllOptions, FindByIDRequest, IdentifierType } from './request.models';
 import { Observable } from 'rxjs';
-import { IdentifierType } from '../index/index.reducer';
 import { RemoteData } from './remote-data';
 import { DSOChangeAnalyzer } from './dso-change-analyzer.service';
 import { Injectable } from '@angular/core';
@@ -61,7 +60,7 @@ export class DsoRedirectDataService extends DataService<any> {
 
   findById(id: string, identifierType = IdentifierType.UUID): Observable<RemoteData<FindByIDRequest>> {
     this.setLinkPath(identifierType);
-    return super.findById(id, identifierType).pipe(
+    return super.findById(id).pipe(
       getFinishedRemoteData(),
       take(1),
       tap((response) => {

src/app/core/data/dspace-object-data.service.spec.ts

@@ -10,7 +10,6 @@ import { ObjectCacheService } from '../cache/object-cache.service';
 import { NotificationsService } from '../../shared/notifications/notifications.service';
 import { HttpClient } from '@angular/common/http';
 import { NormalizedObjectBuildService } from '../cache/builders/normalized-object-build.service';
-import { IdentifierType } from '../index/index.reducer';
 
 describe('DSpaceObjectDataService', () => {
   let scheduler: TestScheduler;
@@ -73,7 +72,7 @@ describe('DSpaceObjectDataService', () => {
       scheduler.schedule(() => service.findById(testObject.uuid));
       scheduler.flush();
 
-      expect(requestService.configure).toHaveBeenCalledWith(new FindByIDRequest(requestUUID, requestURL, testObject.uuid, IdentifierType.UUID), false);
+      expect(requestService.configure).toHaveBeenCalledWith(new FindByIDRequest(requestUUID, requestURL, testObject.uuid), false);
     });
 
     it('should return a RemoteData<DSpaceObject> for the object with the given ID', () => {

src/app/core/data/request.models.ts

@@ -19,10 +19,15 @@ import { MetadatafieldParsingService } from './metadatafield-parsing.service';
 import { URLCombiner } from '../url-combiner/url-combiner';
 import { TaskResponseParsingService } from '../tasks/task-response-parsing.service';
 import { MappedCollectionsReponseParsingService } from './mapped-collections-reponse-parsing.service';
-import { IdentifierType } from '../index/index.reducer';
 
 /* tslint:disable:max-classes-per-file */
 
+// uuid and handle requests have separate endpoints
+export enum IdentifierType {
+  UUID ='uuid',
+  HANDLE = 'handle'
+}
+
 export abstract class RestRequest {
   public responseMsToLive = 0;
   constructor(
@@ -126,8 +131,7 @@ export class FindByIDRequest extends GetRequest {
   constructor(
     uuid: string,
     href: string,
-    public resourceID: string,
-    public identifierType?: IdentifierType
+    public resourceID: string
   ) {
     super(uuid, href);
   }

src/app/core/data/request.service.spec.ts

@@ -11,7 +11,6 @@ import { UUIDService } from '../shared/uuid.service';
 import { RequestConfigureAction, RequestExecuteAction } from './request.actions';
 import {
   DeleteRequest,
-  FindByIDRequest,
   GetRequest,
   HeadRequest,
   OptionsRequest,
@@ -22,7 +21,6 @@ import {
 } from './request.models';
 import { RequestService } from './request.service';
 import { TestScheduler } from 'rxjs/testing';
-import { IdentifierType } from '../index/index.reducer';
 
 describe('RequestService', () => {
   let scheduler: TestScheduler;
@@ -40,7 +38,6 @@ describe('RequestService', () => {
   const testDeleteRequest = new DeleteRequest(testUUID, testHref);
   const testOptionsRequest = new OptionsRequest(testUUID, testHref);
   const testHeadRequest = new HeadRequest(testUUID, testHref);
-  const testFindByIdRequest = new FindByIDRequest(testUUID, testHref, testUUID, IdentifierType.UUID);
   const testPatchRequest = new PatchRequest(testUUID, testHref);
   let selectSpy;
 
@@ -309,14 +306,6 @@ describe('RequestService', () => {
           const result = serviceAsAny.isCachedOrPending(testGetRequest);
           const expected = true;
 
-          expect(result).toEqual(expected);
-        });
-        it('should return true for instance of FindByIdRequest', () => {
-          (objectCache.hasBySelfLink as any).and.returnValue(false);
-          const result = serviceAsAny.isCachedOrPending(testFindByIdRequest);
-          expect(objectCache.hasById).toHaveBeenCalledWith(testUUID, IdentifierType.UUID);
-          const expected = true;
-
           expect(result).toEqual(expected);
         });
       });

src/app/core/data/request.service.ts

@@ -11,7 +11,7 @@ import { hasValue, isEmpty, isNotEmpty } from '../../shared/empty.util';
 import { CacheableObject } from '../cache/object-cache.reducer';
 import { ObjectCacheService } from '../cache/object-cache.service';
 import { CoreState } from '../core.reducers';
-import { IdentifierType, IndexState, MetaIndexState, REQUEST, UUID_MAPPING } from '../index/index.reducer';
+import { IndexName, IndexState, MetaIndexState } from '../index/index.reducer';
 import {
   originalRequestUUIDFromRequestUUIDSelector,
   requestIndexSelector,
@@ -19,7 +19,7 @@ import {
 } from '../index/index.selectors';
 import { UUIDService } from '../shared/uuid.service';
 import { RequestConfigureAction, RequestExecuteAction, RequestRemoveAction } from './request.actions';
-import { FindByIDRequest, GetRequest, RestRequest } from './request.models';
+import { GetRequest, RestRequest } from './request.models';
 import { RequestEntry, RequestState } from './request.reducer';
 import { CommitSSBAction } from '../cache/server-sync-buffer.actions';
 import { RestRequestMethod } from './rest-request-method';
@@ -162,7 +162,7 @@ export class RequestService {
         filter((entry) => hasValue(entry)),
         take(1)
       ).subscribe((entry) => {
-          return this.store.dispatch(new AddToIndexAction(UUID_MAPPING, request.uuid, entry.request.uuid))
+          return this.store.dispatch(new AddToIndexAction(IndexName.UUID_MAPPING, request.uuid, entry.request.uuid))
         }
       )
     }
@@ -206,7 +206,7 @@ export class RequestService {
       }
     });
     this.requestsOnTheirWayToTheStore = this.requestsOnTheirWayToTheStore.filter((reqHref: string) => reqHref.indexOf(href) < 0);
-    this.indexStore.dispatch(new RemoveFromIndexBySubstringAction(REQUEST, href));
+    this.indexStore.dispatch(new RemoveFromIndexBySubstringAction(IndexName.REQUEST, href));
   }
 
   /**
@@ -225,14 +225,7 @@ export class RequestService {
   private isCachedOrPending(request: GetRequest): boolean {
     const inReqCache = this.hasByHref(request.href);
     const inObjCache = this.objectCache.hasBySelfLink(request.href);
-    let inObjIdCache = false;
-    if (request instanceof FindByIDRequest) {
-      const req = request as FindByIDRequest;
-      if (hasValue(req.identifierType && hasValue(req.resourceID))) {
-        inObjIdCache = this.objectCache.hasById(req.resourceID, req.identifierType)
-      }
-    }
-    const isCached = inReqCache || inObjCache || inObjIdCache;
+    const isCached = inReqCache || inObjCache;
     const isPending = this.isPending(request);
     return isCached || isPending;
   }

src/app/core/index/index.actions.ts

@@ -1,7 +1,7 @@
 import { Action } from '@ngrx/store';
 
 import { type } from '../../shared/ngrx/type';
-import {  } from './index.reducer';
+import { IndexName } from './index.reducer';
 
 /**
  * The list of HrefIndexAction type definitions
@@ -19,7 +19,7 @@ export const IndexActionTypes = {
 export class AddToIndexAction implements Action {
   type = IndexActionTypes.ADD;
   payload: {
-    name: string;
+    name: IndexName;
     value: string;
     key: string;
   };
@@ -34,7 +34,7 @@ export class AddToIndexAction implements Action {
    * @param value
    *    the self link of the resource the key belongs to
    */
-  constructor(name: string, key: string, value: string) {
+  constructor(name: IndexName, key: string, value: string) {
     this.payload = { name, key, value };
   }
 }
@@ -45,7 +45,7 @@ export class AddToIndexAction implements Action {
 export class RemoveFromIndexByValueAction implements Action {
   type = IndexActionTypes.REMOVE_BY_VALUE;
   payload: {
-    name: string,
+    name: IndexName,
     value: string
   };
 
@@ -57,7 +57,7 @@ export class RemoveFromIndexByValueAction implements Action {
    * @param value
    *    the value to remove the UUID for
    */
-  constructor(name: string, value: string) {
+  constructor(name: IndexName, value: string) {
     this.payload = { name, value };
   }
 
@@ -69,7 +69,7 @@ export class RemoveFromIndexByValueAction implements Action {
 export class RemoveFromIndexBySubstringAction implements Action {
   type = IndexActionTypes.REMOVE_BY_SUBSTRING;
   payload: {
-    name: string,
+    name: IndexName,
     value: string
   };
 
@@ -81,7 +81,7 @@ export class RemoveFromIndexBySubstringAction implements Action {
    * @param value
    *    the value to remove the UUID for
    */
-  constructor(name: string, value: string) {
+  constructor(name: IndexName, value: string) {
     this.payload = { name, value };
   }
 

src/app/core/index/index.effects.ts

@@ -10,55 +10,31 @@ import {
 import { RequestActionTypes, RequestConfigureAction } from '../data/request.actions';
 import { AddToIndexAction, RemoveFromIndexByValueAction } from './index.actions';
 import { hasValue } from '../../shared/empty.util';
-import { getIdentiferByIndexName, IdentifierType, REQUEST } from './index.reducer';
+import { IndexName } from './index.reducer';
 import { RestRequestMethod } from '../data/rest-request-method';
 
 @Injectable()
-export class IdentifierIndexEffects {
+export class UUIDIndexEffects {
 
-  @Effect() addObjectByUUID$ = this.actions$
+  @Effect() addObject$ = this.actions$
     .pipe(
       ofType(ObjectCacheActionTypes.ADD),
       filter((action: AddToObjectCacheAction) => hasValue(action.payload.objectToCache.uuid)),
       map((action: AddToObjectCacheAction) => {
         return new AddToIndexAction(
-          getIdentiferByIndexName(IdentifierType.UUID),
+          IndexName.OBJECT,
           action.payload.objectToCache.uuid,
           action.payload.objectToCache.self
         );
       })
     );
 
-  @Effect() addObjectByHandle$ = this.actions$
-    .pipe(
-      ofType(ObjectCacheActionTypes.ADD),
-      filter((action: AddToObjectCacheAction) => hasValue(action.payload.objectToCache.handle)),
-      map((action: AddToObjectCacheAction) => {
-        return new AddToIndexAction(
-          getIdentiferByIndexName(IdentifierType.HANDLE),
-          action.payload.objectToCache.handle,
-          action.payload.objectToCache.self
-        );
-      })
-    );
-
-  @Effect() removeObjectByUUID$ = this.actions$
+  @Effect() removeObject$ = this.actions$
     .pipe(
       ofType(ObjectCacheActionTypes.REMOVE),
       map((action: RemoveFromObjectCacheAction) => {
         return new RemoveFromIndexByValueAction(
-          getIdentiferByIndexName(IdentifierType.UUID),
-          action.payload
-        );
-      })
-    );
-
-  @Effect() removeObjectByHandle$ = this.actions$
-    .pipe(
-      ofType(ObjectCacheActionTypes.REMOVE),
-      map((action: RemoveFromObjectCacheAction) => {
-        return new RemoveFromIndexByValueAction(
-          getIdentiferByIndexName(IdentifierType.HANDLE),
+          IndexName.OBJECT,
           action.payload
         );
       })
@@ -70,7 +46,7 @@ export class IdentifierIndexEffects {
       filter((action: RequestConfigureAction) => action.payload.method === RestRequestMethod.GET),
       map((action: RequestConfigureAction) => {
         return new AddToIndexAction(
-          REQUEST,
+          IndexName.REQUEST,
           action.payload.href,
           action.payload.uuid
         );

src/app/core/index/index.reducer.spec.ts

@@ -1,6 +1,6 @@
 import * as deepFreeze from 'deep-freeze';
 
-import { getIdentiferByIndexName, IdentifierType, indexReducer, MetaIndexState, REQUEST, } from './index.reducer';
+import { IndexName, indexReducer, MetaIndexState } from './index.reducer';
 import { AddToIndexAction, RemoveFromIndexBySubstringAction, RemoveFromIndexByValueAction } from './index.actions';
 
 class NullAction extends AddToIndexAction {
@@ -15,19 +15,14 @@ class NullAction extends AddToIndexAction {
 describe('requestReducer', () => {
   const key1 = '567a639f-f5ff-4126-807c-b7d0910808c8';
   const key2 = '1911e8a4-6939-490c-b58b-a5d70f8d91fb';
-  const key3 = '123456789/22';
   const val1 = 'https://dspace7.4science.it/dspace-spring-rest/api/core/items/567a639f-f5ff-4126-807c-b7d0910808c8';
   const val2 = 'https://dspace7.4science.it/dspace-spring-rest/api/core/items/1911e8a4-6939-490c-b58b-a5d70f8d91fb';
-  const uuidIndex = getIdentiferByIndexName(IdentifierType.UUID);
-  const handleIndex = getIdentiferByIndexName(IdentifierType.HANDLE);
   const testState: MetaIndexState = {
-    'object/uuid-to-self-link/uuid': {
+    [IndexName.OBJECT]: {
       [key1]: val1
-    },'object/uuid-to-self-link/handle': {
-      [key3]: val1
-    },'get-request/href-to-uuid': {
+    },[IndexName.REQUEST]: {
       [key1]: val1
-    },'get-request/configured-to-cache-uuid': {
+    },[IndexName.UUID_MAPPING]: {
       [key1]: val1
     }
   };
@@ -50,38 +45,27 @@ describe('requestReducer', () => {
   it('should add the \'key\' with the corresponding \'value\' to the correct substate, in response to an ADD action', () => {
     const state = testState;
 
-    const action = new AddToIndexAction(REQUEST, key2, val2);
+    const action = new AddToIndexAction(IndexName.REQUEST, key2, val2);
     const newState = indexReducer(state, action);
 
-    expect(newState[REQUEST][key2]).toEqual(val2);
+    expect(newState[IndexName.REQUEST][key2]).toEqual(val2);
   });
 
   it('should remove the given \'value\' from its corresponding \'key\' in the correct substate, in response to a REMOVE_BY_VALUE action', () => {
     const state = testState;
 
-    let action = new RemoveFromIndexByValueAction(uuidIndex, val1);
-    let newState = indexReducer(state, action);
-
-    expect(newState[uuidIndex][key1]).toBeUndefined();
-
-    action =  new RemoveFromIndexByValueAction(handleIndex, val1);
-    newState = indexReducer(state, action);
-
-    expect(newState[handleIndex][key3]).toBeUndefined();
+    const action = new RemoveFromIndexByValueAction(IndexName.OBJECT, val1);
+    const newState = indexReducer(state, action);
 
+    expect(newState[IndexName.OBJECT][key1]).toBeUndefined();
   });
 
   it('should remove the given \'value\' from its corresponding \'key\' in the correct substate, in response to a REMOVE_BY_SUBSTRING action', () => {
     const state = testState;
 
-    let action = new RemoveFromIndexBySubstringAction(uuidIndex, key1);
-    let newState = indexReducer(state, action);
+    const action = new RemoveFromIndexBySubstringAction(IndexName.OBJECT, key1);
+    const newState = indexReducer(state, action);
 
-    expect(newState[uuidIndex][key1]).toBeUndefined();
-
-    action = new RemoveFromIndexBySubstringAction(handleIndex, key3);
-    newState = indexReducer(state, action);
-
-    expect(newState[uuidIndex][key3]).toBeUndefined();
+    expect(newState[IndexName.OBJECT][key1]).toBeUndefined();
   });
 });

src/app/core/index/index.reducer.ts

@@ -6,25 +6,23 @@ import {
   RemoveFromIndexByValueAction
 } from './index.actions';
 
-export enum IdentifierType {
-  UUID ='uuid',
-  HANDLE = 'handle'
-}
-
 /**
+ * An enum containing all index names
+ */
+export enum IndexName {
+  // Contains all objects in the object cache indexed by UUID
+  OBJECT = 'object/uuid-to-self-link',
+
+  // contains all requests in the request cache indexed by UUID
+  REQUEST = 'get-request/href-to-uuid',
+
+  /**
    * Contains the UUIDs of requests that were sent to the server and
    * have their responses cached, indexed by the UUIDs of requests that
    * weren't sent because the response they requested was already cached
    */
-export const UUID_MAPPING = 'get-request/configured-to-cache-uuid';
-
-// contains all requests in the request cache indexed by UUID
-export const REQUEST = 'get-request/href-to-uuid';
-
-// returns the index for the provided id type (uuid, handle)
-export const getIdentiferByIndexName = (idType: IdentifierType): string => {
-  return `object/uuid-to-self-link/${idType}`;
-};
+  UUID_MAPPING = 'get-request/configured-to-cache-uuid'
+}
 
 /**
  * The state of a single index
@@ -36,11 +34,8 @@ export interface IndexState {
 /**
  * The state that contains all indices
  */
-export interface MetaIndexState {
-  'get-request/configured-to-cache-uuid': IndexState,
-  'get-request/href-to-uuid': IndexState,
-  'object/uuid-to-self-link/uuid': IndexState,
-  'object/uuid-to-self-link/handle': IndexState
+export type MetaIndexState = {
+  [name in IndexName]: IndexState
 }
 
 // Object.create(null) ensures the object has no default js properties (e.g. `__proto__`)

src/app/core/index/index.selectors.ts

@@ -3,14 +3,7 @@ import { AppState } from '../../app.reducer';
 import { hasValue } from '../../shared/empty.util';
 import { CoreState } from '../core.reducers';
 import { coreSelector } from '../core.selectors';
-import {
-  getIdentiferByIndexName,
-  IdentifierType,
-  IndexState,
-  MetaIndexState,
-  REQUEST,
-  UUID_MAPPING
-} from './index.reducer';
+import { IndexName, IndexState, MetaIndexState } from './index.reducer';
 
 /**
  * Return the MetaIndexState based on the CoreSate
@@ -27,17 +20,13 @@ export const metaIndexSelector: MemoizedSelector<AppState, MetaIndexState> = cre
  * Return the object index based on the MetaIndexState
  * It contains all objects in the object cache indexed by UUID
  *
- * @param identifierType the type of index, used to select index from state
- *
  * @returns
  *    a MemoizedSelector to select the object index
  */
-export const objectIndexSelector = (identifierType: IdentifierType = IdentifierType.UUID): MemoizedSelector<AppState, IndexState> => {
-  return createSelector(
+export const objectIndexSelector: MemoizedSelector<AppState, IndexState> = createSelector(
   metaIndexSelector,
-    (state: MetaIndexState) => state[getIdentiferByIndexName(identifierType)]
-  );
-}
+  (state: MetaIndexState) => state[IndexName.OBJECT]
+);
 
 /**
  * Return the request index based on the MetaIndexState
@@ -47,7 +36,7 @@ export const objectIndexSelector = (identifierType: IdentifierType = IdentifierT
  */
 export const requestIndexSelector: MemoizedSelector<AppState, IndexState> = createSelector(
   metaIndexSelector,
-  (state: MetaIndexState) => state[REQUEST]
+  (state: MetaIndexState) => state[IndexName.REQUEST]
 );
 
 /**
@@ -58,7 +47,7 @@ export const requestIndexSelector: MemoizedSelector<AppState, IndexState> = crea
  */
 export const requestUUIDIndexSelector: MemoizedSelector<AppState, IndexState> = createSelector(
   metaIndexSelector,
-  (state: MetaIndexState) => state[UUID_MAPPING]
+  (state: MetaIndexState) => state[IndexName.UUID_MAPPING]
 );
 
 /**
@@ -71,9 +60,9 @@ export const requestUUIDIndexSelector: MemoizedSelector<AppState, IndexState> =
  *    a MemoizedSelector to select the self link
  */
 export const selfLinkFromUuidSelector =
-  (id: string, identifierType: IdentifierType = IdentifierType.UUID): MemoizedSelector<AppState, string> => createSelector(
-    objectIndexSelector(identifierType),
-    (state: IndexState) => hasValue(state) ? state[id] : undefined
+  (uuid: string): MemoizedSelector<AppState, string> => createSelector(
+    objectIndexSelector,
+    (state: IndexState) => hasValue(state) ? state[uuid] : undefined
   );
 
 /**