vaadin-app: change component error message from application level uncaught exception handler

1 files changed, 28 insertions, 1 deletions

diff --git a/vaadin-app/src/ch/asynk/helloworld/HelloWorldApp.java b/vaadin-app/src/ch/asynk/helloworld/HelloWorldApp.java
index 1185f65..3dfe515 100644
--- a/vaadin-app/src/ch/asynk/helloworld/HelloWorldApp.java
+++ b/vaadin-app/src/ch/asynk/helloworld/HelloWorldApp.java
@@ -5,6 +5,12 @@ import java.util.Date;
 import com.vaadin.Application;
 import com.vaadin.terminal.UserError;
 import com.vaadin.terminal.Terminal;
+import com.vaadin.terminal.SystemError;
+import com.vaadin.terminal.ErrorMessage;
+import com.vaadin.terminal.VariableOwner;
+import com.vaadin.terminal.URIHandler;
+import com.vaadin.terminal.ParameterHandler;
+import com.vaadin.terminal.gwt.server.ChangeVariablesErrorEvent;
 import com.vaadin.data.Property;
 import com.vaadin.data.Property.ValueChangeEvent;
 import com.vaadin.data.util.ObjectProperty;
@@ -16,6 +22,7 @@ import com.vaadin.ui.Label;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.TextField;
+import com.vaadin.ui.AbstractComponent;
 
 class DataMappingLayout extends FormLayout {
 
@@ -108,7 +115,27 @@ public class HelloWorldApp extends Application {
     @Override
     public void terminalError(Terminal.ErrorEvent event) {
         // Call the default implementation.
-        super.terminalError(event);
+        //super.terminalError(event);
+        // http://dev.vaadin.com/browser/releases/6.6.6/src/com/vaadin/Application.java#L1190
+        final Throwable t = event.getThrowable();
+        Object owner = null;
+        if (event instanceof VariableOwner.ErrorEvent) {
+            owner = ((VariableOwner.ErrorEvent) event).getVariableOwner();
+        } else if (event instanceof URIHandler.ErrorEvent) {
+            owner = ((URIHandler.ErrorEvent) event).getURIHandler();
+        } else if (event instanceof ParameterHandler.ErrorEvent) {
+            owner = ((ParameterHandler.ErrorEvent) event).getParameterHandler();
+        } else if (event instanceof ChangeVariablesErrorEvent) {
+            owner = ((ChangeVariablesErrorEvent) event).getComponent();
+        }
+        if (owner instanceof AbstractComponent) {
+            if (t instanceof ErrorMessage) {
+                ((AbstractComponent) owner).setComponentError((ErrorMessage)t);
+            } else {
+                //((AbstractComponent) owner).setComponentError(new SystemError(t));
+                ((AbstractComponent) owner).setComponentError(new UserError("User Error!"));
+            }
+        }
         // Some custom behaviour.
         if (getMainWindow() != null) {
             getMainWindow().showNotification("An unchecked exception occured!", event.getThrowable().toString(), Window.Notification.TYPE_ERROR_MESSAGE);