Choose startup plug

Question

Hi all,
  in my WD application controller I'm executing some code in wddoInit method and, depending from the result of this code, I'd like to plug one view or another.
  I try to use the wddoBeforeNavigation to fire an event, catch it in the default view and then fire plug to the second one but I have the following error:
com.sap.tc.webdynpro.services.exceptions.WDRuntimeException: Cannot navigate from view DefaultView because it is not part of the current view assembly
how can I solve this?
thanks in advance,
Stefano

Answer 1

Hi all,
  I found this documentation about the method wddobeforenavigation()
Navigation Preparation u2013 wdDoBeforeNavigation()
When executing large Web Dynpro applications, it might not be sufficient to ensure the consistency of the user entries by checking the individual contexts or all controller contexts within a single Web Dynpro component. SAP recommends that before you trigger a navigation change, you should check whether controller contexts of several Web Dynpro components contain valid data.
The Hook method wdDoBeforeNavigation() in the component controller allows you to execute such extensive and cross-component checks and display error messages, if necessary.  This method is called by the Web Dynpro runtime before each processing of the navigation targets that have been accumulated till then. Only when the check is terminated, the Web Dynpro runtime assembles all views visible on the user interface (the new view assembly), initializes the view controller instances that have not been created yet and processes there the inbound plug event handlers defined by the navigation targets
So I fullfill my requirements with this code in wddoinit:
if (<condition>) {
  IWDWindowInfo myWindowInfo = wdThis.wdGetAPI().getComponentInfo().findInWindows("myWin");
  IWDViewUsageInfo myView2UsageInfo = myWindowInfo.getViewUsageByID("myView2");
  myWindowInfo.setDefaultRootViewUsage(myView2UsageInfo);
thanks to everybody.
Stefano