refactored IDToUUIDSerializer

src/app/core/cache/it-to-uuid-serializer.spec.ts

+import { IDToUUIDSerializer } from './it-to-uuid-serializer';
+
+fdescribe('IDToUUIDSerializer', () => {
+  let serializer: IDToUUIDSerializer;
+  const prefix = 'test-prefix';
+
+  beforeEach(() => {
+    serializer = new IDToUUIDSerializer(prefix);
+  });
+
+  describe('Serialize', () => {
+    it('should return undefined', () => {
+      expect(serializer.Serialize('some-uuid')).toBeUndefined()
+    });
+  });
+
+  describe('Deserialize', () => {
+    describe('when ID is defined', () => {
+      it('should prepend the prefix to the ID', () => {
+        const id = 'some-id';
+        expect(serializer.Deserialize(id)).toBe(`${prefix}-${id}`);
+      });
+    });
+
+    describe('when ID is null or undefined', () => {
+      it('should return null or undefined', () => {
+        expect(serializer.Deserialize(null)).toBeNull();
+        expect(serializer.Deserialize(undefined)).toBeUndefined();
+      });
+    });
+
+  });
+
+});

src/app/core/cache/it-to-uuid-serializer.ts

+import { hasValue } from '../../shared/empty.util';
+
+export class IDToUUIDSerializer {
+  constructor(private prefix: string) {
+  }
+
+  Serialize(uuid: string): any {
+    return undefined; // ui-only uuid doesn't need to be sent back to the server
+  }
+
+  Deserialize(id: string): string {
+    if (hasValue(id)) {
+      return `${this.prefix}-${id}`;
+    } else {
+      return id;
+    }
+
+  }
+}

src/app/core/cache/models/normalized-bitstream-format.model.ts

 import { autoserialize, autoserializeAs, inheritSerialization } from 'cerialize';
+import { BitstreamFormat } from '../../shared/bitstream-format.model';
 
 import { mapsTo } from '../builders/build-decorators';
-import { BitstreamFormat } from '../../shared/bitstream-format.model';
+import { IDToUUIDSerializer } from '../it-to-uuid-serializer';
 import { NormalizedObject } from './normalized-object.model';
-import { NormalizedDSpaceObject } from './normalized-dspace-object.model';
-
-// While BitstreamFormats don't have a UUID, but need to be cachable: use this serializer. Remove it when the REST API returns them with UUID
-const BitstreamFormatUUIDSerializer = {
-  Serialize(json: any): any {
-    // No need to serialize again, de ID is already serialized by the id field itself
-    return {};
-  },
-  Deserialize(json: any): any {
-    return 'bitstream-format-' + json.id;
-  }
-};
 
 @mapsTo(BitstreamFormat)
 @inheritSerialization(NormalizedObject)
@@ -41,6 +30,6 @@ export class NormalizedBitstreamFormat extends NormalizedObject {
   @autoserialize
   id: string;
 
-  @autoserializeAs(BitstreamFormatUUIDSerializer)
+  @autoserializeAs(new IDToUUIDSerializer('bitstream-format'), 'id')
   uuid: string;
 }

src/app/core/cache/models/normalized-resource-policy.model.ts

 import { autoserialize, autoserializeAs, inheritSerialization } from 'cerialize';
+import { ResourcePolicy } from '../../shared/resource-policy.model';
 
 import { mapsTo } from '../builders/build-decorators';
-import { BitstreamFormat } from '../../shared/bitstream-format.model';
+import { IDToUUIDSerializer } from '../it-to-uuid-serializer';
 import { NormalizedObject } from './normalized-object.model';
-import { ResourcePolicy } from '../../shared/resource-policy.model';
-
-// While ResourcePolicyUUIDSerializer don't have a UUID, but need to be cachable: use this serializer. Remove it when the REST API returns them with UUID
-const ResourcePolicyUUIDSerializer = {
-  Serialize(json: any): any {
-    // No need to serialize again, de ID is already serialized by the id field itself
-    return {};
-  },
-  Deserialize(json: any): any {
-    return 'resource-policy-' + json.id;
-  }
-};
 
 @mapsTo(ResourcePolicy)
 @inheritSerialization(NormalizedObject)
@@ -29,6 +18,6 @@ export class NormalizedResourcePolicy extends NormalizedObject {
   @autoserialize
   id: string;
 
-  @autoserializeAs(ResourcePolicyUUIDSerializer)
+  @autoserializeAs(new IDToUUIDSerializer('resource-policy'), 'id')
   uuid: string;
 }