Bug fixed

Signed-off-by: asharani-murugesh <asharani.murugesh@in.bosch.com>

hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/artifacts/upload/UploadHandler.java

@@ -89,7 +89,6 @@ public class UploadHandler implements StreamVariable, Receiver, SucceededListene
     @Override
     public final OutputStream getOutputStream() {
         try {
-        	view.getDuplicateFileNamesList().clear();
             return view.saveUploadedFileDetails(fileName, fileSize, mimeType);
         } catch (final ArtifactUploadFailedException e) {
             LOG.error("Atifact upload failed {} ", e);
@@ -109,7 +108,6 @@ public class UploadHandler implements StreamVariable, Receiver, SucceededListene
     public OutputStream receiveUpload(final String fileName, final String mimeType) {
         this.fileName = fileName;
         this.mimeType = mimeType;
-        view.getDuplicateFileNamesList().clear();
         try {
             if (view.validate()) {
                 if (view.checkForDuplicate(fileName)) {
@@ -169,7 +167,7 @@ public class UploadHandler implements StreamVariable, Receiver, SucceededListene
         view.updateActionCount();
 
         // display the duplicate message after streaming all files
-        view.displayValidationMessage();
+        view.displayDuplicateValidationMessage();
     }
 
     /**
@@ -294,7 +292,7 @@ public class UploadHandler implements StreamVariable, Receiver, SucceededListene
         if (view.enableProcessBtn()) {
             infoWindow.uploadSessionFinished();
         }
-        view.displayValidationMessage();
+        view.displayDuplicateValidationMessage();
 
         LOG.info("Streaming failed due to  :{}", event.getException());
     }
@@ -318,7 +316,6 @@ public class UploadHandler implements StreamVariable, Receiver, SucceededListene
         }
         view.updateActionCount();
         infoWindow.uploadFailed(event.getFilename(), failureReason);
-
         LOG.info("Upload failed for file :{}", event.getReason());
 
     }

hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/artifacts/upload/UploadLayout.java

@@ -71,7 +71,7 @@ import com.vaadin.ui.VerticalLayout;
 /**
  * Upload files layout.
  *
- * @author G Venkata Narayana (RBEI/BSO3)
+ *
  */
 @ViewScope
 @SpringComponent
@@ -207,7 +207,7 @@ public class UploadLayout extends VerticalLayout {
 						uploadInfoWindow.uploadSessionStarted();
 					} else {
 						//If the upload is not started, it signifies all dropped files as either duplicate or directory.So display message accordingly
-						displayCompositeMessage(hasDirectory);
+						displayCompositeMessage();
 					}
 				}
 			}
@@ -221,12 +221,10 @@ public class UploadLayout extends VerticalLayout {
 		return false;
 	}
 
-	private void displayCompositeMessage(final Boolean hasDirectory) {
-		final String duplicateMessage = showDuplicateMessage();
+	private void displayCompositeMessage() {
+		final String duplicateMessage = getDuplicateFileValidationMessage();
 		final StringBuilder compositeMessage = new StringBuilder();
-		if (null != duplicateMessage) {
-			// in case if all selected files are duplicate ,then display
-			// messag
+		if (!Strings.isNullOrEmpty(duplicateMessage)) {
 			compositeMessage.append(duplicateMessage);
 		}
 		if (hasDirectory) {
@@ -351,6 +349,7 @@ public class UploadLayout extends VerticalLayout {
     Boolean validate() {
         if (!isSoftwareModuleSelected()) {
             uiNotification.displayValidationError(i18n.get("message.error.noSwModuleSelected"));
+
             return false;
         }
         return true;
@@ -415,30 +414,31 @@ public class UploadLayout extends VerticalLayout {
         }
     }
 
-	void displayValidationMessage() {
+    void displayDuplicateValidationMessage() {
         // check if streaming of all dropped files are completed
         if (numberOfFilesActuallyUpload.intValue() == numberOfFileUploadsExpected.intValue()) {
-			displayCompositeMessage(hasDirectory);
+            displayCompositeMessage();
         }
     }
     
-	/**
-	 * Show duplicate file selected message.
-	 * 
-	 * @return duplicate file names
-	 */
-	public String showDuplicateMessage() {
+
+	private String getDuplicateFileValidationMessage() {
+		StringBuilder message = new StringBuilder();
 		if (!duplicateFileNamesList.isEmpty()) {
 			final String fileNames = StringUtils.collectionToCommaDelimitedString(duplicateFileNamesList);
 			if (duplicateFileNamesList.size() == 1) {
-				return i18n.get("message.no.duplicateFile") + fileNames;
+				message.append(i18n.get("message.no.duplicateFile") + fileNames);
 
 			} else if (duplicateFileNamesList.size() > 1) {
-				return i18n.get("message.no.duplicateFiles");
+				message.append(i18n.get("message.no.duplicateFiles"));
 			}
 			duplicateFileNamesList.clear();
 		}
-		return null;
+		return message.toString();
+	}
+
+	public void showDuplicateMessage() {
+		uiNotification.displayValidationError(getDuplicateFileValidationMessage());
 	}
 	
     void increaseNumberOfFileUploadsExpected() {