Prevent upload if no file is selected. (#11939)

Fixes #10419

1 files changed, 10 insertions, 11 deletions

diff --git a/server/src/main/java/com/vaadin/ui/Upload.java b/server/src/main/java/com/vaadin/ui/Upload.java
index 018b06e581..de2d520438 100644
--- a/server/src/main/java/com/vaadin/ui/Upload.java
+++ b/server/src/main/java/com/vaadin/ui/Upload.java
@@ -1038,21 +1038,20 @@ public class Upload extends AbstractComponent
     }
 
     /**
-     * Forces the upload the send selected file to the server.
+     * Instructs the upload component to send selected file to the server.
      * <p>
      * In case developer wants to use this feature, he/she will most probably
-     * want to hide the uploads internal submit button by setting its caption to
-     * null with {@link #setButtonCaption(String)} method.
+     * want to hide the upload component's internal submit button by setting its
+     * caption to null with {@link #setButtonCaption(String)} method.
      * <p>
-     * Note, that the upload runs asynchronous. Developer should use normal
-     * upload listeners to trac the process of upload. If the field is empty
-     * uploaded the file name will be empty string and file length 0 in the
-     * upload finished event.
+     * Note that the upload runs asynchronously. Developer should use normal
+     * upload listeners to track the process of upload. If the file name field
+     * is empty, no upload will be triggered.
      * <p>
-     * Also note, that the developer should not remove or modify the upload in
-     * the same user transaction where the upload submit is requested. The
-     * upload may safely be hidden or removed once the upload started event is
-     * fired.
+     * Also note that the developer should not remove or modify the upload
+     * component in the same user transaction where the upload submit is
+     * requested. The upload component can be safely hidden or removed once the
+     * upload started event has been fired.
      */
     public void submitUpload() {
         markAsDirty();