Error dump after using requestFocus()

[Former Member]

Hello!

I try to use the requestFocus method in my wd prog but I get a dump like:

Error stacktrace:

java.lang.NullPointerException

at sap.com.telia.inputview.InputView.wdDoModifyView(InputView.java:138)

at sap.com.telia.inputview.wdp.InternalInputView.wdDoModifyView(InternalInputView.java:405)

at com.sap.tc.webdynpro.progmodel.generation.DelegatingView.doModifyView(DelegatingView.java:78)

at com.sap.tc.webdynpro.progmodel.view.View.modifyView(View.java:190)

at com.sap.tc.webdynpro.clientserver.cal.ClientComponent.doModifyView(ClientComponent.java:397)

at com.sap.tc.webdynpro.clientserver.cal.ClientApplication.modifyView(ClientApplication.java:613)

at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.handleActionEvent(WebDynproMainTask.java:372)

at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.execute(WebDynproMainTask.java:640)

at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:59)

at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java:251)

at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doWebDynproProcessing(DispatcherServlet.java:154)

at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:116)

at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doGet(DispatcherServlet.java:48)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:391)

at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:265)

at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:345)

at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:323)

at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:865)

at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:240)

at com.sap.engine.services.httpserver.server.Client.handle(Client.java:92)

at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:148)

at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:37)

at com.sap.engine.core.cluster.impl6.session.UnorderedChannel$MessageRunner.run(UnorderedChannel.java:71)

at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)

at java.security.AccessController.doPrivileged(Native Method)

at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:94)

at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:162)

This is my code in wdDoModifyView:

public static void wdDoModifyView(IPrivateInputView wdThis, IPrivateInputView.IContextNode wdContext, com.sap.tc.webdynpro.progmodel.api.IWDView view, boolean firstTime)

{

//@@begin wdDoModifyView

if(firstTime) {

IWDInputField input = (IWDInputField)view.getElement("CustomerID");

input.requestFocus();

}

//@@end

}

CustomerID is not in a separate node, it's a value directly under rootnode.

I have CustomerID set as a String, is that a problem?. I just want focus to be on this field when the program starts.

I have a separate method for getting data (I know...it's a ugly hack but I'm a n00b and in the learningphase :

//@@begin javadoc:onActionretrieveData(ServerEvent)

/** Declared validating event handler. */

//@@end

public void onActionretrieveData(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )

{

//@@begin onActionretrieveData(ServerEvent)

String firstCustomerId = "1234";

String secondCustomerId = "501025";

String usedCustomerId = wdContext.currentContextElement().getCustomerID();

if((usedCustomerId.equals(firstCustomerId)) || (usedCustomerId.equals(secondCustomerId))) {

wdThis.wdGetTeliaPortalDemoCompController().Clear();

wdThis.wdGetTeliaPortalDemoCompController().fillView();

} else wdThis.wdGetTeliaPortalDemoCompController().Clear();

//@@end

}

[Former Member · Accepted solution]

Hello Peter,

Could you post the code that coressponds to line number 138 in the view <i>InputView</i>?.

Bala

[Former Member · Accepted solution]

Hello Bala!

That line is actually "input.requestFocus();" of

public static void wdDoModifyView(IPrivateInputView wdThis, IPrivateInputView.IContextNode wdContext, com.sap.tc.webdynpro.progmodel.api.IWDView view, boolean firstTime)

{

//@@begin wdDoModifyView

if(firstTime) {

IWDInputField input = (IWDInputField)view.getElement("CustomerID");

input.requestFocus();

}

//@@end

}

[Former Member · Accepted solution]

Peter,

Check ID of InputField. It is not a CustomerID, probably CustomerID is context attribute, but InputField has different id -- see view layout.

Valery Silaev

EPAM Systems

http://www.NetWeaverTeam.com

[Former Member · Accepted solution]

Ah yes, You're quite right. I thought the ID was "CustomerID" when it actually was "CUSTOMERID".

Thank you very much for your help!

Regards

[Former Member · Accepted solution]

Instead of using IWDViewElement.requestFocus(), you could also use the "indirect" way

IWDViewController.requestFocus(IWDNodeElement nodeElement, IWDAttributeInfo attribute) 

This method requests focus for the given context attribute in your case the attribute to which the "value" property of the InputField is bound.

Armin

[Former Member · Accepted solution]

Peter,

Please read this: https://www.sdn.sap.com/irj/sdn/crphelp.

And please close threads yor opened.

VS

[Former Member · Accepted solution]

Of course, thanks for your info!