Issuing an "input missing" error message in a view!

Question

Hello,
I've created a view in WebDynpro which is composed of one inputfield. I've created a method called checkString(), to check if the value entered in the InputField is valid. I wanted to copy an example i've seen from the same kind. Here is part of the code:
msgMng = wdComponentAPI.getMessageManager();
+       String value = wdContext.nodePurchase().currentPurchaseElement().getAttributeAsText("Stock");+
+       if(value.length() == 0){+
+            msgMng.reportContextAttributeMessage(+
+                      wdContext.nodePurchase().currentPurchaseElement().getAttributePointer("Stock"),+
+                      IMessagePurchaseSelection.INPUT_MISSING,+
+                      new Object [] {"Stock"});+
+            return true;     +
+       }+
The problem is i can't permanently modify IMessagePurchaseSelection class (The changes are discarded at every build). I guess in the example i've seen, the INPUT_MISSING constant have been automatically generated, so how can i do the same?
public static final com.sap.tc.webdynpro.progmodel.api.IWDMessage INPUT_MISSING = new com.sap.tc.webdynpro.progmodel.gci.impl.GCIMessage( com.sap.test.glx.tutorial.wdui.purchaseselection.PurchaseSelection.class, "InputMissing", com.sap.tc.webdynpro.services.message.WDMessageType.ERROR );
Best Regards
Jean

Answer 1

Hi,
The problem is i can't permanently modify IMessagePurchaseSelection class (The changes are discarded at every build). I guess in the example i've seen, the INPUT_MISSING constant have been automatically generated, so how can i do the same?
You have to make changes in the Message Pool of your component.(DC).
Regards
Ayyapparaj