UWL : Web Dynpro (Java) View

Hi All,
I'm new in development/configuration of UWL. Some requirements I already could realize. But now I'm I need to implement a totally new inputfield to the task creation and some business logic behind some actions e.g. an already filled out assignment to a portal group if a task type is selected.
The only way I see is to re-create and customize the development components from the server node. Please, could you give me some hints to solve this issue in an easier way?
Thank you !!!!!
Laslo

Hello Saar,
Thanks for reply.
I have already referred & seen these links and they doesn't suit to my problem.
Below link from your suggestion talks about custom UWL Connectors, which is not the case with me. I have a SAP Standard AlertConnector.
And code extract I mentioned in my question is already working fine and able to retrieve workitems from other connectors, except this AlertConnector and that's the problem.
http://help.sap.com/javadocs/nwce/ce71/uw/uwl%20custom%20connector%20api.pdf
Also, I couldn't get clear idea from javadocs about how to read workitems from "AlertConnector".
Issue:
I have created a Web Dynpro Java DC that renders custom view for Portal UWL.
I am using UWL API to read workitems from various connectors. This is working fine so far.
Now I created a AlertConnector and alerts are appearing in SAP standard UWL view under "Alerts" tab, but they don't appear in my custom UWL application.
Is there any special way to read "alerts" from UWL API?
Following is code extract that I use currently: -
UWLView uwlView = uwlService.getViewManager(uwlContext).getView("DefaultView", uwlContext);
IUWLItemManager itemManager = uwlService.getItemManager(uwlContext);
QueryResult queryResult = itemManager.getItemsForView(uwlContext, uwlView, null, mycompoundExpression);
ItemCollection results = queryResult.getItems();

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