on 07-03-2005 8:47 AM
Hello All,
Below is an attempt to print out the contents of a context attribute that I have created.
wdContext.nodeToApprover().currentToApproverElement().setCostcenterOwnername("Test Name");
String name = wdContext.nodeToApprover().currentToApproverElement().getCostcenterOwnername();
wdComponentAPI.getMessageManager().reportSuccess("Interface controller = " + name);
However upon execution, I am always getting this NUllPointerException. Can someone kinly point ot where I may have gone wrong ?
from
Kwok Wei
Hi
Try to use the following.
wdContext.nodeToApprover().get<nodename>elementat(index).setCostcenterOwnername("Test Name");
String name = wdContext.nodeToApprover().get<nodename>elementat(index).getCostcenterOwnername();
wdComponentAPI.getMessageManager().reportSuccess("Interface controller = " + name);
Kishore
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Please post the complete stack trace and check the content and lead selection of the context node.
Armin
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Hi Armin,
Below is the stack trace as requested. Just some more info background for you, what I did was
<b>interface controller (FuncApproverCompInterface) (mapped)> Component controller (Another component)</b>
The idea is to get some values that was initialised in the component controller and have that passed over to the interface controller (that belongs to another component).
I have ensured that there is value in the component controller by printing out the values in the message manager. However, when I attempted to do the same thing in the receiving end of the interface controller, it fails and returns that error message.
==========================================================
Error stacktrace:
java.lang.NullPointerException
at com.sap.project.xbtr.funcapprover.FuncApproverCompInterface.wdDoInit(FuncApproverCompInterface.java:97)
at com.sap.project.xbtr.funcapprover.wdp.InternalFuncApproverCompInterface.wdDoInit(InternalFuncApproverCompInterface.java:135)
at com.sap.tc.webdynpro.progmodel.generation.DelegatingCustomController.doInit(DelegatingCustomController.java:73)
at com.sap.tc.webdynpro.progmodel.controller.Controller.initController(Controller.java:215)
at com.sap.tc.webdynpro.progmodel.controller.Controller.init(Controller.java:200)
at com.sap.tc.webdynpro.progmodel.controller.Component.getCustomControllerInternal(Component.java:436)
at com.sap.tc.webdynpro.progmodel.controller.Component.getMappableContext(Component.java:374)
at com.sap.tc.webdynpro.progmodel.controller.Component.getMappableContext(Component.java:403)
at com.sap.tc.webdynpro.progmodel.context.MappingInfo.init(MappingInfo.java:138)
at com.sap.tc.webdynpro.progmodel.context.NodeInfo.init(NodeInfo.java:746)
at com.sap.tc.webdynpro.progmodel.context.NodeInfo.init(NodeInfo.java:761)
at com.sap.tc.webdynpro.progmodel.context.Context.init(Context.java:40)
at com.sap.tc.webdynpro.progmodel.controller.Controller.init(Controller.java:199)
at com.sap.tc.webdynpro.clientserver.cal.ClientComponent.init(ClientComponent.java:346)
at com.sap.tc.webdynpro.clientserver.cal.ClientComponent.createComponent(ClientComponent.java:854)
at com.sap.tc.webdynpro.clientserver.cal.ClientComponent.createComponent(ClientComponent.java:157)
at com.sap.tc.webdynpro.progmodel.components.ComponentUsage.createComponentInternal(ComponentUsage.java:143)
at com.sap.tc.webdynpro.progmodel.components.ComponentUsage.createComponent(ComponentUsage.java:110)
at com.sap.tc.webdynpro.progmodel.components.ComponentUsage.createInstanceIfDemanded(ComponentUsage.java:699)
at com.sap.tc.webdynpro.progmodel.components.ComponentUsage.getImplementingInterfaceViewInfo(ComponentUsage.java:397)
at com.sap.tc.webdynpro.clientserver.cal.ClientComponent.getViewManagerFor(ClientComponent.java:294)
at com.sap.tc.webdynpro.progmodel.view.ViewManager.createUninitializedView(ViewManager.java:458)
at com.sap.tc.webdynpro.progmodel.view.ViewManager.getView(ViewManager.java:524)
at com.sap.tc.webdynpro.progmodel.view.ViewManager.bind(ViewManager.java:398)
at com.sap.tc.webdynpro.progmodel.view.ViewManager.getView(ViewManager.java:555)
at com.sap.tc.webdynpro.progmodel.view.ViewManager.bindRoot(ViewManager.java:422)
at com.sap.tc.webdynpro.progmodel.view.ViewManager.init(ViewManager.java:130)
at com.sap.tc.webdynpro.progmodel.view.InterfaceView.initController(InterfaceView.java:41)
at com.sap.tc.webdynpro.progmodel.controller.Controller.init(Controller.java:200)
at com.sap.tc.webdynpro.clientserver.cal.ClientComponent.displayToplevelComponent(ClientComponent.java:134)
at com.sap.tc.webdynpro.clientserver.cal.ClientApplication.init(ClientApplication.java:373)
at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.execute(WebDynproMainTask.java:608)
at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:59)
at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java:252)
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:392)
at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)
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:95)
at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:159)
from
Kwok Wei
Hi,
The problem could be "No data" in the node "ToApprover".
Please check the cardinality. If its 0..n then makesure that you are creating an element of the nodetype .
Regards, Anilkumar
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