more methods in IDataSource

projects/poweredsoft/data/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@poweredsoft/data",
-  "version": "0.0.32",
+  "version": "0.0.33",
   "peerDependencies": {
     "rxjs": "^6.5.3"
   }

projects/poweredsoft/data/src/lib/DataSource.ts

@@ -63,6 +63,38 @@ export class DataSource<TModel> implements IDataSource<TModel>
         this._initCriteria();
     }
 
+    clear() {
+        this.data = null;
+        this._dataSubject.next(null);
+    }
+
+    updateData(value: IQueryExecutionResult<TModel> & IQueryExecutionGroupResult<TModel>) {
+        this.data = value;
+        this._dataSubject.next(this.data);
+    }
+
+    replaceDataWithArray(items: TModel[]) {
+        this.data = {
+            totalRecords: items.length,
+            numberOfPages: null,
+            groups: null,
+            aggregates: null,
+            data: items
+        };
+        this._dataSubject.next(this.data);
+    }
+
+    replaceDataWithSingle(item: TModel) {
+        this.data = {
+            totalRecords: 1,
+            numberOfPages: null,
+            groups: null,
+            aggregates: null,
+            data: [item]
+        };
+        this._dataSubject.next(this.data);
+    }
+
     protected _initCriteria() {
         if (!this.options.defaultCriteria) 
             return;

projects/poweredsoft/data/src/lib/IDataSource.ts

@@ -12,6 +12,10 @@ export interface IDataSource<TModel>
     excuteQuery<TQuery extends IQueryCriteria>(query: TQuery): Observable<IQueryExecutionGroupResult<TModel> & IQueryExecutionGroupResult<TModel>>;
     refresh();
     resolveIdField<TKeyType extends any>(model: TModel) : TKeyType;
+    clear();
+    updateData(value: IQueryExecutionResult<TModel> & IQueryExecutionGroupResult<TModel>);
+    replaceDataWithArray(items: TModel[]);
+    replaceDataWithSingle(item: TModel);
 
     data$: Observable<IQueryExecutionResult<TModel> & IQueryExecutionGroupResult<TModel>>;
     loading$: Observable<boolean>;