61949: replacing object factories with decorator

src/app/core/metadata/metadata-field.model.ts

@@ -0,0 +1,25 @@
+import { ListableObject } from '../../shared/object-collection/shared/listable-object.model';
+import { isNotEmpty } from '../../shared/empty.util';
+import { MetadataSchema } from './metadata-schema.model';
+
+export class MetadataField implements ListableObject {
+  id: number;
+
+  self: string;
+
+  element: string;
+
+  qualifier: string;
+
+  scopeNote: string;
+
+  schema: MetadataSchema;
+
+  toString(separator: string = '.'): string {
+    let key = this.schema.prefix + separator + this.element;
+    if (isNotEmpty(this.qualifier)) {
+      key += separator + this.qualifier;
+    }
+    return key;
+  }
+}