fixed and tests for equals method

src/app/+my-dspace-page/my-dspace-result.model.ts

@@ -5,7 +5,7 @@ import { ListableObject } from '../shared/object-collection/shared/listable-obje
 /**
  * Represents a search result object of a certain (<T>) DSpaceObject
  */
-export class MyDSpaceResult<T extends DSpaceObject> implements ListableObject {
+export class MyDSpaceResult<T extends DSpaceObject> extends ListableObject {
   /**
    * The DSpaceObject that was found
    */

src/app/core/eperson/models/normalized-eperson.model.ts

@@ -1,7 +1,6 @@
 import { autoserialize, deserialize, inheritSerialization } from 'cerialize';
 
 import { CacheableObject } from '../../cache/object-cache.reducer';
-import { ListableObject } from '../../../shared/object-collection/shared/listable-object.model';
 import { NormalizedDSpaceObject } from '../../cache/models/normalized-dspace-object.model';
 import { EPerson } from './eperson.model';
 import { mapsTo, relationship } from '../../cache/builders/build-decorators';
@@ -9,7 +8,7 @@ import { ResourceType } from '../../shared/resource-type';
 
 @mapsTo(EPerson)
 @inheritSerialization(NormalizedDSpaceObject)
-export class NormalizedEPerson extends NormalizedDSpaceObject<EPerson> implements CacheableObject, ListableObject {
+export class NormalizedEPerson extends NormalizedDSpaceObject<EPerson> implements CacheableObject {
 
   /**
    * A string representing the unique handle of this EPerson

src/app/core/eperson/models/normalized-group.model.ts

@@ -1,7 +1,6 @@
 import { autoserialize, deserialize, inheritSerialization } from 'cerialize';
 
 import { CacheableObject } from '../../cache/object-cache.reducer';
-import { ListableObject } from '../../../shared/object-collection/shared/listable-object.model';
 import { NormalizedDSpaceObject } from '../../cache/models/normalized-dspace-object.model';
 import { mapsTo, relationship } from '../../cache/builders/build-decorators';
 import { Group } from './group.model';
@@ -9,7 +8,7 @@ import { ResourceType } from '../../shared/resource-type';
 
 @mapsTo(Group)
 @inheritSerialization(NormalizedDSpaceObject)
-export class NormalizedGroup extends NormalizedDSpaceObject<Group> implements CacheableObject, ListableObject {
+export class NormalizedGroup extends NormalizedDSpaceObject<Group> implements CacheableObject {
 
   /**
    * List of Groups that this Group belong to
@@ -36,3 +35,4 @@ export class NormalizedGroup extends NormalizedDSpaceObject<Group> implements Ca
   @autoserialize
   public permanent: boolean;
 }
+

src/app/core/metadata/metadatafield.model.ts

@@ -3,7 +3,7 @@ import { autoserialize } from 'cerialize';
 import { ListableObject } from '../../shared/object-collection/shared/listable-object.model';
 import { isNotEmpty } from '../../shared/empty.util';
 
-export class MetadataField implements ListableObject {
+export class MetadataField extends ListableObject {
   @autoserialize
   id: number;
 

src/app/core/metadata/metadataschema.model.ts

@@ -1,16 +1,13 @@
 import { autoserialize } from 'cerialize';
 import { ListableObject } from '../../shared/object-collection/shared/listable-object.model';
+import { CacheableObject } from '../cache/object-cache.reducer';
 
-export class MetadataSchema implements ListableObject {
-  @autoserialize
+export class MetadataSchema extends ListableObject {
   id: number;
 
-  @autoserialize
   self: string;
 
-  @autoserialize
   prefix: string;
 
-  @autoserialize
   namespace: string;
 }

src/app/core/metadata/normalized-metadata-schema.model.ts

@@ -1,14 +1,13 @@
 import { autoserialize } from 'cerialize';
 import { NormalizedObject } from '../cache/models/normalized-object.model';
 import { mapsTo } from '../cache/builders/build-decorators';
-import { ListableObject } from '../../shared/object-collection/shared/listable-object.model';
 import { MetadataSchema } from './metadataschema.model';
 
 /**
  * Normalized class for a DSpace MetadataSchema
  */
 @mapsTo(MetadataSchema)
-export class NormalizedMetadataSchema extends NormalizedObject<MetadataSchema> implements ListableObject {
+export class NormalizedMetadataSchema extends NormalizedObject<MetadataSchema> {
   /**
    * The unique identifier for this schema
    */
@@ -32,4 +31,5 @@ export class NormalizedMetadataSchema extends NormalizedObject<MetadataSchema> i
    */
   @autoserialize
   namespace: string;
+
 }

src/app/core/registry/registry.service.ts

@@ -400,7 +400,7 @@ export class RegistryService {
       distinctUntilChanged()
     );
 
-    const serializedSchema = new DSpaceRESTv2Serializer(NormalizedObjectFactory.getConstructor(ResourceType.MetadataSchema)).serialize(schema as NormalizedMetadataSchema);
+    const serializedSchema = new DSpaceRESTv2Serializer(NormalizedObjectFactory.getConstructor(ResourceType.MetadataSchema)).serialize(schema as any as NormalizedMetadataSchema);
 
     const request$ = endpoint$.pipe(
       take(1),

src/app/core/shared/browse-entry.model.ts

@@ -1,8 +1,8 @@
 import { autoserialize, autoserializeAs } from 'cerialize';
-import { Equatable } from '../utilities/equatable';
-import { hasValue } from '../../shared/empty.util';
+import { ListableObject } from '../../shared/object-collection/shared/listable-object.model';
+import { excludeFromEquals } from '../utilities/equals.decorators';
 
-export class BrowseEntry implements Equatable<BrowseEntry> {
+export class BrowseEntry extends ListableObject {
   @autoserialize
   type: string;
 
@@ -19,11 +19,4 @@ export class BrowseEntry implements Equatable<BrowseEntry> {
   @autoserialize
   count: number;
 
-  equals(other: BrowseEntry): boolean {
-    if (hasValue(other)) {
-      return false;
-    }
-    return false;
-  }
-
 }

src/app/core/shared/dspace-object.model.ts

@@ -12,7 +12,7 @@ import { hasNoValue } from '../../shared/empty.util';
 /**
  * An abstract model class for a DSpaceObject.
  */
-export class DSpaceObject implements CacheableObject, ListableObject {
+export class DSpaceObject extends ListableObject implements CacheableObject {
 
   private _name: string;
 

src/app/core/shared/search/search-sidebar.service.spec.ts

@@ -1,10 +1,10 @@
 import { Store } from '@ngrx/store';
 import { SearchSidebarService } from './search-sidebar.service';
-import { AppState } from '../../app.reducer';
 import { async, TestBed } from '@angular/core/testing';
 import { of as observableOf } from 'rxjs';
 import { SearchSidebarCollapseAction, SearchSidebarExpandAction } from '../../../shared/search/search-sidebar/search-sidebar.actions';
-import { HostWindowService } from '../../shared/host-window.service';
+import { AppState } from '../../../app.reducer';
+import { HostWindowService } from '../../../shared/host-window.service';
 
 describe('SearchSidebarService', () => {
   let service: SearchSidebarService;

src/app/core/submission/models/submission-object.model.ts

@@ -1,7 +1,6 @@
 import { Observable } from 'rxjs';
 
 import { CacheableObject } from '../../cache/object-cache.reducer';
-import { ListableObject } from '../../../shared/object-collection/shared/listable-object.model';
 import { DSpaceObject } from '../../shared/dspace-object.model';
 import { EPerson } from '../../eperson/models/eperson.model';
 import { RemoteData } from '../../data/remote-data';
@@ -18,7 +17,7 @@ export interface SubmissionObjectError {
 /**
  * An abstract model class for a SubmissionObject.
  */
-export abstract class SubmissionObject extends DSpaceObject implements CacheableObject, ListableObject {
+export abstract class SubmissionObject extends DSpaceObject implements CacheableObject {
 
   /**
    * The workspaceitem/workflowitem identifier

src/app/core/tasks/models/task-object.model.ts

@@ -2,14 +2,13 @@ import { Observable } from 'rxjs';
 
 import { CacheableObject } from '../../cache/object-cache.reducer';
 import { DSpaceObject } from '../../shared/dspace-object.model';
-import { ListableObject } from '../../../shared/object-collection/shared/listable-object.model';
 import { RemoteData } from '../../data/remote-data';
 import { Workflowitem } from '../../submission/models/workflowitem.model';
 
 /**
  * An abstract model class for a TaskObject.
  */
-export class TaskObject extends DSpaceObject implements CacheableObject, ListableObject {
+export class TaskObject extends DSpaceObject implements CacheableObject {
 
   /**
    * The task identifier

src/app/core/utilities/equals.decorators.ts

@@ -34,6 +34,6 @@ export function fieldsForEquals(...fields: string[]): any {
 
 
 export function getFieldsForEquals(constructor: Function, field: string) {
-  const fieldMap = excludedFromEquals.get(constructor) || new Map();
+  const fieldMap = fieldsForEqualsMap.get(constructor) || new Map();
   return fieldMap.get(field);
 }

src/app/core/utilities/equatable.spec.ts

@@ -0,0 +1,70 @@
+import { excludeFromEquals, fieldsForEquals } from './equals.decorators';
+import { EquatableObject } from './equatable';
+import { cloneDeep } from 'lodash';
+
+class Dog extends EquatableObject<Dog> {
+  public name: string;
+
+  @excludeFromEquals
+  public ballsCaught: number;
+
+  @fieldsForEquals('name', 'age')
+  public owner: {
+    name: string;
+    age: number;
+    favouriteFood: string;
+  }
+}
+
+fdescribe('equatable', () => {
+  let dogRoger: Dog;
+  let dogMissy: Dog;
+
+  beforeEach(() => {
+    dogRoger = new Dog();
+    dogRoger.name = 'Roger';
+    dogRoger.ballsCaught = 6;
+    dogRoger.owner = { name: 'Tommy', age: 16, favouriteFood: 'spaghetti' };
+
+    dogMissy = new Dog();
+    dogMissy.name = 'Missy';
+    dogMissy.ballsCaught = 9;
+    dogMissy.owner = { name: 'Jenny', age: 29, favouriteFood: 'pizza' };
+  });
+
+  it('should return false when the other object is undefined', () => {
+    const isEqual = dogRoger.equals(undefined);
+    expect(isEqual).toBe(false);
+  });
+
+  it('should return true when the other object is the exact same object', () => {
+    const isEqual = dogRoger.equals(dogRoger);
+    expect(isEqual).toBe(true);
+  });
+
+  it('should return true when the other object is an exact copy of the first one', () => {
+    const copyOfDogRoger = cloneDeep(dogRoger);
+    const isEqual = dogRoger.equals(copyOfDogRoger);
+    expect(isEqual).toBe(true);
+  });
+
+  it('should return false when the other object differs in all fields', () => {
+    const isEqual = dogRoger.equals(dogMissy);
+    expect(isEqual).toBe(false);
+  });
+
+  it('should return true when the other object only differs in fields that are marked as excludeFromEquals', () => {
+    const copyOfDogRoger = cloneDeep(dogRoger);
+    copyOfDogRoger.ballsCaught = 4;
+    const isEqual = dogRoger.equals(copyOfDogRoger);
+    expect(isEqual).toBe(true);
+  });
+
+  it('should return false when the other object differs in fields that are not marked as excludeFromEquals', () => {
+    const copyOfDogRoger = cloneDeep(dogRoger);
+    copyOfDogRoger.name = 'Elliot';
+    const isEqual = dogRoger.equals(copyOfDogRoger);
+    expect(isEqual).toBe(false);
+  });
+});
+

src/app/core/utilities/equatable.ts

@@ -12,11 +12,11 @@ function equalsByFields(object1, object2, fieldList): boolean {
     if (hasNoValue(object1[key]) || hasNoValue(object2[key])) {
       return true;
     }
-    const mapping = getFieldsForEquals(this.constructor, key);
+    const mapping = getFieldsForEquals(object1.constructor, key);
     if (hasValue(mapping)) {
       return !equalsByFields(object1[key], object2[key], mapping);
     }
-    if (this[key] instanceof EquatableObject) {
+    if (object1[key] instanceof EquatableObject) {
       return !object1[key].equals(object2[key]);
     }
     return object1[key] !== object2[key];
@@ -26,6 +26,12 @@ function equalsByFields(object1, object2, fieldList): boolean {
 
 export abstract class EquatableObject<T> {
   equals(other: T): boolean {
+    if (hasNoValue(other)) {
+      return false;
+    }
+    if (this as any === other) {
+      return true;
+    }
     const excludedKeys = getExcludedFromEqualsFor(this.constructor);
     const keys = Object.keys(this).filter((key) => excludedKeys.findIndex((excludedKey) => key === excludedKey) < 0);
     return equalsByFields(this, other, keys);

src/app/shared/form/builder/ds-dynamic-form-ui/models/lookup-relation/dynamic-lookup-relation-modal.component.ts

@@ -8,15 +8,14 @@ import { PaginatedSearchOptions } from '../../../../../search/paginated-search-o
 import { DSpaceObject } from '../../../../../../core/shared/dspace-object.model';
 import { PaginationComponentOptions } from '../../../../../pagination/pagination-component-options.model';
 import { NgbActiveModal } from '@ng-bootstrap/ng-bootstrap';
-import { hasNoValue, hasValue, isNotEmpty } from '../../../../../empty.util';
-import { getSucceededRemoteData } from '../../../../../../core/shared/operators';
-import { concat, map, multicast, take, takeWhile, tap } from 'rxjs/operators';
+import { hasValue } from '../../../../../empty.util';
+import { concat, map, multicast, take, takeWhile } from 'rxjs/operators';
 import { Router } from '@angular/router';
 import { SEARCH_CONFIG_SERVICE } from '../../../../../../+my-dspace-page/my-dspace-page.component';
 import { SearchConfigurationService } from '../../../../../../core/shared/search/search-configuration.service';
 import { SelectableListService } from '../../../../../object-list/selectable-list/selectable-list.service';
-import { ListableObject } from '../../../../../object-collection/shared/listable-object.model';
 import { SelectableListState } from '../../../../../object-list/selectable-list/selectable-list.reducer';
+import { ListableObject } from '../../../../../object-collection/shared/listable-object.model';
 
 const RELATION_TYPE_FILTER_PREFIX = 'f.entityType=';
 

src/app/shared/object-collection/shared/listable-object.model.ts

@@ -0,0 +1,3 @@
+import { EquatableObject } from '../../../core/utilities/equatable';
+
+export class ListableObject extends EquatableObject<ListableObject>{}

src/app/shared/object-list/item-list-element/item-types/typed-item-search-result-list-element.component.ts

@@ -26,10 +26,12 @@ export class TypedItemSearchResultListElementComponent extends SearchResultListE
       this.object = obj as ItemSearchResult;
       this.dso = this.object.indexableObject;
     } else {
-      this.object = {
+      this.object = Object.assign(
+        new ItemSearchResult(),
+        {
           indexableObject: obj as Item,
           hitHighlights: new MetadataMap()
-      };
+        });
       this.dso = obj as Item;
     }
     this.item = this.dso;

src/app/shared/object-list/selectable-list/selectable-list.reducer.ts

@@ -80,13 +80,13 @@ function selectSingle(state: SelectableListState, action: SelectableListSelectSi
 }
 
 function deselect(state: SelectableListState, action: SelectableListDeselectAction) {
-  const newSelection = state.selection.filter((selected) => hasNoValue(action.payload.find((object) => object.uuid === selected.uuid)));
+  const newSelection = state.selection.filter((selected) => hasNoValue(action.payload.find((object) => object.equals(selected))));
   return Object.assign({}, state, { selection: newSelection });
 }
 
 function deselectSingle(state: SelectableListState, action: SelectableListDeselectSingleAction) {
   const newSelection = state.selection.filter((selected) => {
-    return selected.uuid !== action.payload.uuid
+    return !selected.equals(action.payload);
   });
   return Object.assign({}, state, { selection: newSelection });
 }
@@ -101,5 +101,5 @@ function clearSelection(id: string) {
 
 
 function isObjectInSelection(selection: ListableObject[], object: ListableObject) {
-  return selection.findIndex((selected) => selected.uuid === object.uuid) >= 0
+  return selection.findIndex((selected) => selected.equals(object)) >= 0
 }

src/app/shared/search/normalized-search-result.model.ts

@@ -5,7 +5,7 @@ import { ListableObject } from '../object-collection/shared/listable-object.mode
 /**
  * Represents a normalized version of a search result object of a certain DSpaceObject
  */
-export class NormalizedSearchResult implements ListableObject {
+export class NormalizedSearchResult extends ListableObject {
   /**
    * The UUID of the DSpaceObject that was found
    */

src/app/shared/search/search-labels/search-labels.component.spec.ts

@@ -2,15 +2,15 @@ import { SearchLabelsComponent } from './search-labels.component';
 import { async, ComponentFixture, TestBed } from '@angular/core/testing';
 import { NoopAnimationsModule } from '@angular/platform-browser/animations';
 import { TranslateModule } from '@ngx-translate/core';
-import { SearchService } from '../search-service/search.service';
 import { ChangeDetectionStrategy, NO_ERRORS_SCHEMA } from '@angular/core';
 import { FormsModule } from '@angular/forms';
-import { SearchServiceStub } from '../../shared/testing/search-service-stub';
 import { Observable, of as observableOf } from 'rxjs';
 import { Params } from '@angular/router';
-import { ObjectKeysPipe } from '../../shared/utils/object-keys-pipe';
-import { SEARCH_CONFIG_SERVICE } from '../../+my-dspace-page/my-dspace-page.component';
-import { SearchConfigurationServiceStub } from '../../shared/testing/search-configuration-service-stub';
+import { ObjectKeysPipe } from '../../utils/object-keys-pipe';
+import { SearchServiceStub } from '../../testing/search-service-stub';
+import { SEARCH_CONFIG_SERVICE } from '../../../+my-dspace-page/my-dspace-page.component';
+import { SearchService } from '../../../core/shared/search/search.service';
+import { SearchConfigurationServiceStub } from '../../testing/search-configuration-service-stub';
 
 describe('SearchLabelsComponent', () => {
   let comp: SearchLabelsComponent;

src/app/shared/search/search-result.model.ts

@@ -5,7 +5,7 @@ import { ListableObject } from '../object-collection/shared/listable-object.mode
 /**
  * Represents a search result object of a certain (<T>) DSpaceObject
  */
-export class SearchResult<T extends DSpaceObject> implements ListableObject {
+export class SearchResult<T extends DSpaceObject> extends ListableObject {
   /**
    * The DSpaceObject that was found
    */

src/app/shared/search/search-switch-configuration/search-switch-configuration.component.spec.ts

@@ -6,13 +6,16 @@ import { of as observableOf } from 'rxjs';
 import { TranslateLoader, TranslateModule } from '@ngx-translate/core';
 
 import { SearchSwitchConfigurationComponent } from './search-switch-configuration.component';
-import { MYDSPACE_ROUTE, SEARCH_CONFIG_SERVICE } from '../../+my-dspace-page/my-dspace-page.component';
-import { SearchConfigurationServiceStub } from '../../shared/testing/search-configuration-service-stub';
-import { MockTranslateLoader } from '../../shared/mocks/mock-translate-loader';
 import { NavigationExtras, Router } from '@angular/router';
-import { RouterStub } from '../../shared/testing/router-stub';
-import { MyDSpaceConfigurationValueType } from '../../+my-dspace-page/my-dspace-configuration-value-type';
-import { SearchService } from '../search-service/search.service';
+import { SearchConfigurationServiceStub } from '../../testing/search-configuration-service-stub';
+import { RouterStub } from '../../testing/router-stub';
+import { SearchService } from '../../../core/shared/search/search.service';
+import {
+  MYDSPACE_ROUTE,
+  SEARCH_CONFIG_SERVICE
+} from '../../../+my-dspace-page/my-dspace-page.component';
+import { MyDSpaceConfigurationValueType } from '../../../+my-dspace-page/my-dspace-configuration-value-type';
+import { MockTranslateLoader } from '../../mocks/mock-translate-loader';
 
 describe('SearchSwitchConfigurationComponent', () => {