Added more comments

src/app/submission/sections/upload/file/view/section-upload-file-view.component.ts

@@ -5,17 +5,42 @@ import { isNotEmpty } from '../../../../../shared/empty.util';
 import { Metadata } from '../../../../../core/shared/metadata.utils';
 import { MetadataMap, MetadataValue } from '../../../../../core/shared/metadata.models';
 
+/**
+ * This component allow to show bitstream's metadata
+ */
 @Component({
   selector: 'ds-submission-upload-section-file-view',
   templateUrl: './section-upload-file-view.component.html',
 })
 export class UploadSectionFileViewComponent implements OnInit {
+
+  /**
+   * The bitstream's metadata data
+   * @type {WorkspaceitemSectionUploadFileObject}
+   */
   @Input() fileData: WorkspaceitemSectionUploadFileObject;
 
+  /**
+   * The [[MetadataMap]] object
+   * @type {MetadataMap}
+   */
   public metadata: MetadataMap = Object.create({});
+
+  /**
+   * The bitstream's title key
+   * @type {string}
+   */
   public fileTitleKey = 'Title';
+
+  /**
+   * The bitstream's description key
+   * @type {string}
+   */
   public fileDescrKey = 'Description';
 
+  /**
+   * Initialize instance variables
+   */
   ngOnInit() {
     if (isNotEmpty(this.fileData.metadata)) {
       this.metadata[this.fileTitleKey] = Metadata.all(this.fileData.metadata, 'dc.title');
@@ -23,7 +48,15 @@ export class UploadSectionFileViewComponent implements OnInit {
     }
   }
 
-  getAllMetadataValue(metadataKey): MetadataValue[] {
+  /**
+   * Gets all matching metadata in the map(s)
+   *
+   * @param metadataKey
+   *    The metadata key(s) in scope
+   * @returns {MetadataValue[]}
+   *    The matching values
+   */
+  getAllMetadataValue(metadataKey: string): MetadataValue[] {
     return Metadata.all(this.metadata, metadataKey);
   }
 }