on 01-13-2004 12:23 PM
Hi,
during the call of the supply function of a TreeUIElement I get a ClassCastException
at runtime. The call of the supply function in "ChooseProduct.java" comes from the generated class "InternalChooseProduct" (see stacktrace below) and the code there is:
protected void doSupplyElements() {
// call app defined supply function
InternalChooseProduct.this.supplySoftwareTree(this, (IContextElement)getParentElement());
}
so the cast (IContextElement)... goes wrong. I exactly followed the TreeUI example in the
onlinehelp tool in "Code Example for Using a Recursive Node", so I think it must be an internal
problem of the generation of code.
Please help me... - Thorsten
Error stacktrace:
com.sap.tc.webdynpro.services.cal.core.exceptions.ClientRuntimeException: com.dpwn.its.lm.sw.wdp.InternalChooseProduct$SoftwareTreeElement
at com.sap.tc.webdynpro.clientimpl.csf.client.CSFClient.sendResponse(CSFClient.java:479)
at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.execute(WebDynproMainTask.java:544)
at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:48)
at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java:205)
at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doWebDynproProcessing(DispatcherServlet.java:114)
at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:80)
at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:43)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runSerlvet(HttpHandlerImpl.java:262)
at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:92)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:300)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:279)
at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:626)
at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:199)
at com.sap.engine.services.httpserver.server.Client.handle(Client.java:90)
at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:163)
at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:37)
at com.sap.engine.core.cluster.impl6.session.UnorderedChannel$MessageRunner.run(UnorderedChannel.java:60)
at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:56)
at java.security.AccessController.doPrivileged(Native Method)
at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:82)
at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:139)
-
-
caused by -
-
com.sap.tc.webdynpro.services.cal.core.exceptions.ClientRuntimeException: com.dpwn.its.lm.sw.wdp.InternalChooseProduct$SoftwareTreeElement
at com.sap.tc.webdynpro.clientimpl.csf.client.CSFUpdateClientPeer.sendResponse(CSFUpdateClientPeer.java:178)
at com.sap.tc.webdynpro.clientimpl.csf.client.CSFClient.sendResponse(CSFClient.java:476)
at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.execute(WebDynproMainTask.java:544)
at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:48)
at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java:205)
at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doWebDynproProcessing(DispatcherServlet.java:114)
at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:80)
at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:43)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runSerlvet(HttpHandlerImpl.java:262)
at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:92)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:300)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:279)
at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:626)
at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:199)
at com.sap.engine.services.httpserver.server.Client.handle(Client.java:90)
at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:163)
at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:37)
at com.sap.engine.core.cluster.impl6.session.UnorderedChannel$MessageRunner.run(UnorderedChannel.java:60)
at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:56)
at java.security.AccessController.doPrivileged(Native Method)
at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:82)
at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:139)
-
-
caused by -
-
java.lang.ClassCastException: com.dpwn.its.lm.sw.wdp.InternalChooseProduct$SoftwareTreeElement
at com.dpwn.its.lm.sw.wdp.InternalChooseProduct$SoftwareTreeNode.doSupplyElements(InternalChooseProduct.java:328)
at com.sap.tc.webdynpro.progmodel.context.Node.supplyElements(Node.java:346)
at com.sap.tc.webdynpro.progmodel.context.Node.getElements(Node.java:310)
at com.sap.tc.webdynpro.progmodel.context.Node.size(Node.java:622)
at com.sap.tc.webdynpro.clientimpl.csf.renderer.data.DataContainerRenderer.visitNodeOrElements(DataContainerRenderer.java:591)
at com.sap.tc.webdynpro.clientimpl.csf.renderer.data.DataContainerRenderer.visitNodeOrElements(DataContainerRenderer.java:895)
at com.sap.tc.webdynpro.clientimpl.csf.renderer.data.DataContainerRenderer.visitNodeOrElements(DataContainerRenderer.java:673)
at com.sap.tc.webdynpro.clientimpl.csf.renderer.data.DataContainerRenderer.visitNodeOrElements(DataContainerRenderer.java:542)
at com.sap.tc.webdynpro.clientimpl.csf.renderer.data.DataContainerRenderer.visitNodeInfo(DataContainerRenderer.java:259)
at com.sap.tc.webdynpro.clientimpl.csf.renderer.data.DataContainerRenderer.visitNodeInfo(DataContainerRenderer.java:282)
at com.sap.tc.webdynpro.clientimpl.csf.renderer.data.DataContainerRenderer.visitNodeInfo(DataContainerRenderer.java:282)
at com.sap.tc.webdynpro.clientimpl.csf.renderer.data.DataContainerRenderer.visitContext(DataContainerRenderer.java:184)
at com.sap.tc.webdynpro.clientimpl.csf.renderer.data.DataContainerRenderer.visitDataContainer(DataContainerRenderer.java:129)
at com.sap.tc.webdynpro.clientimpl.csf.renderer.data.DataContainerRenderer.render(DataContainerRenderer.java:94)
at com.sap.tc.webdynpro.clientserver.renderer.AbstractRenderManager.render(AbstractRenderManager.java:48)
at com.sap.tc.webdynpro.clientimpl.csf.renderer.core.CSFResponseRenderer.renderDataContainerUpdates(CSFResponseRenderer.java:634)
at com.sap.tc.webdynpro.clientimpl.csf.renderer.core.CSFResponseRenderer.renderUserInterfaceUpdates(CSFResponseRenderer.java:990)
at com.sap.tc.webdynpro.clientimpl.http.client.AbstractUpdateClientPeer.sendResponse(AbstractUpdateClientPeer.java:152)
at com.sap.tc.webdynpro.clientimpl.csf.client.CSFUpdateClientPeer.sendResponse(CSFUpdateClientPeer.java:172)
at com.sap.tc.webdynpro.clientimpl.csf.client.CSFClient.sendResponse(CSFClient.java:476)
at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.execute(WebDynproMainTask.java:544)
at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:48)
at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java:205)
at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doWebDynproProcessing(DispatcherServlet.java:114)
at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:80)
at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:43)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runSerlvet(HttpHandlerImpl.java:262)
at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:92)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:300)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:279)
at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:626)
at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:199)
at com.sap.engine.services.httpserver.server.Client.handle(Client.java:90)
at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:163)
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:60)
at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:56)
at java.security.AccessController.doPrivileged(Native Method)
at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:82)
at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:139)
Hi Thorsten,
It appears from the coding fragment that you have two context nodes SoftwareTree and Elements, both of which have supply functions. In addition to this, the supply function for SoftwareTree is being called from within the supply function for Elements.
Therefore, I need to see the structure of your context. In particular, which node is the parent of which, which nodes have supply functions, and which node is defined as being recursive?
Best regards,
Karin
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