ERROR LIKE:java.lang.NullPointerException

[Former Member]

HI All,

I developed one DC,my requirement is i want to show the POPUP box when i am clicking on the LinkAction,my popup box contains Close button for closing popup ,here popup is opening but when i am clicking on the close button popup should be closed,but popup is not closing i am getting error like:

java.lang.NullPointerException

at session.com.Targetpopup.onActionback(Targetpopup.java:146)

at session.com.wdp.InternalTargetpopup.wdInvokeEventHandler(InternalTargetpopup.java:140)

at com.sap.tc.webdynpro.progmodel.generation.DelegatingView.invokeEventHandler(DelegatingView.java:87)

at com.sap.tc.webdynpro.progmodel.controller.Action.fire(Action.java:67)

at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.doHandleActionEvent(WindowPhaseModel.java:420)

... 26 more

Edited by: Rama krishna.T on Nov 17, 2011 10:19 AM

[Qualiture · Accepted solution]

What is your line of code at Targetpopup.java, row 146?

[Former Member · Accepted solution]

Thank you Robin

IWDWindow window = wdContext.currentContextElement().getWindow(); 145 line

window.destroy(); 146 line

Edited by: Rama krishna.T on Nov 17, 2011 11:15 AM

[Qualiture · Accepted solution]

The error message would suggest the 'window' attribute in your context is not set, and thus resulting in the Nullpointer exception

[Former Member · Accepted solution]

Thank you Robin

Should i set from code or mapping ?

[junwu · Accepted solution]

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[Former Member]

Hi Ramakrishna,

Please create a context attribute "WindowInstance" of type IWDWindow.

Please set the window instace in the button action where you are calling the popup window.

/sample code for theis 
IWDWindowInfo windowInfo = (IWDWindowInfo) wdComponentAPI.getComponentInfo().findInWindows("WindowName");
IWDWindow window = wdComponentAPI.getWindowManager().createModalWindow(windowInfo);
wdContext.currentContextElement().setWindowInstance(window);
window.setWindowPosition(WDWindowPos.CENTER);
window.show();

You create an eventhandler in the view and catch the event in handler which comes from popup view.

Write the code in event handler for destroying the window instance.

wdContext.currentContextElement().getWindowInstance().destroyInstance();

Hope this helps you.

Regards,

Saleem Mohammad.

[former_member372910]

Hi Rama ,

Check if you have created event handler for Close button and given name of Event Handler exact same in method findInEventHandler("eventHandlerName") ;

Regards,

Khalid Desai.

[Former Member]

Hi Rama,

Refer this link.

Hope this will help you.

Regards,

Jithin