Class cast Execption for dropdown coulmn of Tables' column group

[Former Member]

Hi

I have 1 table in which 1 table column group is there.In this group I have 2 columns,among which one is dropdown by key.

I have bound attribute. valueset is also defined.

But it is giving class Cast exception.

But if I take this dropdown column out of table column group, it works very fine.

If inside Table column group , dop down coulmn gives the following error

at com.sap.tc.webdynpro.clientserver.uielib.standard.impl.TableColumn.getTable(TableColumn.java:2222)

at com.sap.tc.webdynpro.clientserver.uielib.standard.uradapter.DropDownByKeyAdapter.getWidth(DropDownByKeyAdapter.java:624)

at com.sap.tc.ur.renderer.ie6.ComboBoxRenderer.render(ComboBoxRenderer.java:53)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

java.lang.ClassCastException

at com.sap.tc.webdynpro.clientserver.uielib.standard.impl.TableColumn.getTable(TableColumn.java:2222)

at com.sap.tc.webdynpro.clientserver.uielib.standard.uradapter.DropDownByKeyAdapter.getWidth(DropDownByKeyAdapter.java:624)

at com.sap.tc.ur.renderer.ie6.ComboBoxRenderer.render(ComboBoxRenderer.java:53)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.ur.renderer.ie6.SapTableCellRenderer.renderSapTableGenericCellFragment(SapTableCellRenderer.java:1188)

at com.sap.tc.ur.renderer.ie6.SapTableCellRenderer.renderSapTableCellFragment(SapTableCellRenderer.java:205)

at com.sap.tc.ur.renderer.ie6.SapTableCellRenderer.render(SapTableCellRenderer.java:84)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.ur.renderer.ie6.SapTableRowRenderer.renderSapTableRowFragment(SapTableRowRenderer.java:105)

at com.sap.tc.ur.renderer.ie6.SapTableRowRenderer.render(SapTableRowRenderer.java:49)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.ur.renderer.ie6.SapTableDefaultBodyRenderer.renderSapTableDefaultBodyFragment(SapTableDefaultBodyRenderer.java:214)

at com.sap.tc.ur.renderer.ie6.SapTableDefaultBodyRenderer.render(SapTableDefaultBodyRenderer.java:44)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.ur.renderer.ie6.SapTableRenderer.renderSapTableFragment(SapTableRenderer.java:775)

at com.sap.tc.ur.renderer.ie6.SapTableRenderer.render(SapTableRenderer.java:84)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutCellFragment(GridLayoutRenderer.java:826)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutRowFragment(GridLayoutRenderer.java:424)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutFragment(GridLayoutRenderer.java:336)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.render(GridLayoutRenderer.java:79)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.ur.renderer.ie6.ScrollContainerRenderer.renderScrollContainerFragment(ScrollContainerRenderer.java:619)

at com.sap.tc.ur.renderer.ie6.ScrollContainerRenderer.render(ScrollContainerRenderer.java:74)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutCellFragment(GridLayoutRenderer.java:826)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutRowFragment(GridLayoutRenderer.java:424)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutFragment(GridLayoutRenderer.java:336)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.render(GridLayoutRenderer.java:79)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.ur.renderer.ie6.ScrollContainerRenderer.renderScrollContainerFragment(ScrollContainerRenderer.java:619)

at com.sap.tc.ur.renderer.ie6.ScrollContainerRenderer.render(ScrollContainerRenderer.java:74)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutCellFragment(GridLayoutRenderer.java:826)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutRowFragment(GridLayoutRenderer.java:424)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutFragment(GridLayoutRenderer.java:336)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.render(GridLayoutRenderer.java:79)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.ur.renderer.ie6.TrayRenderer.renderTrayFragment(TrayRenderer.java:2291)

at com.sap.tc.ur.renderer.ie6.TrayRenderer.render(TrayRenderer.java:84)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutCellFragment(GridLayoutRenderer.java:826)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutRowFragment(GridLayoutRenderer.java:424)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutFragment(GridLayoutRenderer.java:336)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.render(GridLayoutRenderer.java:79)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.ur.renderer.ie6.ScrollContainerRenderer.renderScrollContainerFragment(ScrollContainerRenderer.java:619)

at com.sap.tc.ur.renderer.ie6.ScrollContainerRenderer.render(ScrollContainerRenderer.java:74)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutCellFragment(GridLayoutRenderer.java:826)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutRowFragment(GridLayoutRenderer.java:424)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutFragment(GridLayoutRenderer.java:336)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.render(GridLayoutRenderer.java:79)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.ur.renderer.ie6.ScrollContainerRenderer.renderScrollContainerFragment(ScrollContainerRenderer.java:619)

at com.sap.tc.ur.renderer.ie6.ScrollContainerRenderer.render(ScrollContainerRenderer.java:74)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutCellFragment(GridLayoutRenderer.java:826)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutRowFragment(GridLayoutRenderer.java:424)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.renderGridLayoutFragment(GridLayoutRenderer.java:336)

at com.sap.tc.ur.renderer.ie6.GridLayoutRenderer.render(GridLayoutRenderer.java:79)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.ur.renderer.ie6.ScrollContainerRenderer.renderScrollContainerFragment(ScrollContainerRenderer.java:619)

at com.sap.tc.ur.renderer.ie6.ScrollContainerRenderer.render(ScrollContainerRenderer.java:74)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.UiWindowRenderer.render(UiWindowRenderer.java:52)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:434)

at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.RenderManager.render(RenderManager.java:133)

at com.sap.tc.webdynpro.clientimpl.html.client.HtmlClient.sendHtml(HtmlClient.java:1055)

at com.sap.tc.webdynpro.clientimpl.html.client.HtmlClient.fillDynamicTemplateContext(HtmlClient.java:455)

at com.sap.tc.webdynpro.clientimpl.html.client.HtmlClient.sendResponse(HtmlClient.java:1239)

at com.sap.tc.webdynpro.clientimpl.html.client.HtmlClient.retrieveData(HtmlClient.java:252)

at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.doRetrieveData(WindowPhaseModel.java:595)

at com.sap.tc.webdynpro.clientserver.window.WindowPhaseModel.processRequest(WindowPhaseModel.java:156)

at com.sap.tc.webdynpro.clientserver.window.WebDynproWindow.processRequest(WebDynproWindow.java:335)

at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:143)

at com.sap.tc.webdynpro.clientserver.session.ApplicationSession.doProcessing(ApplicationSession.java:313)

at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessingStandalone(ClientSession.java:759)

at com.sap.tc.webdynpro.clientserver.session.ClientSession.doApplicationProcessing(ClientSession.java:712)

at com.sap.tc.webdynpro.clientserver.session.ClientSession.doProcessing(ClientSession.java:261)

at com.sap.tc.webdynpro.clientserver.session.RequestManager.doProcessing(RequestManager.java:149)

at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:62)

at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doGet(DispatcherServlet.java:46)

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:401)

at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)

at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:387)

at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:365)

at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:944)

at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:266)

at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)

at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:175)

at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)

at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)

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:100)

at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:170)

Please help me out.

I need that column to be in column group.

Regards

Smitha

[Former Member · Accepted solution]

hi all,

I got the same problem when I was developing a table with sorting.

In that I wrote the code like this

IWDTable table=(IWDTable)view.getElement("TableID");

Intially I have given wrong TableID for that It has shown ClassCastException.

I checked and rectified this by giving correct TableID.

I think you have also did the same mistake somewhere while casting.

Thanks&Regards,

Suresh Kumar T

[Former Member · Accepted solution]

But that's not the same problem as discussed here.

Armin

[Former Member · Accepted solution]

Hi Armin,

Thanks for the reply.

I too understand it is not possible.

So I changed the table design , such that, the drpopdown is out of table column group now.

Thnaks and regards

Smiha

[amolgupta]

Hi Smitha,

a class cast exception is nothing much to do with WebDynpro.

you must be doing something which violates basic core Java.

this exception is thrown, when you try to assign an object to a reference of a incompatible class.

just check at the line of exception....

the type of reference and the object assigned to it...

regards,

-Ag.

[Former Member]

Hi Amol,

Thanks for the response.

This ClassCastException is not due to any line of code.

The Exception occurs ,even if I don't write any code regarding the context variable bound to this dropdownbykey UI elemnt.

It works very fine , if I remove this dropdownbyKey UI element from table column group, and keeps under a normal table column.

the exception doesn't point to any line no : in my View's code.

please help me out.

Thanks Smitha

[Former Member]

You can't do anything here, it's a bug in that Web Dynpro version. There is some wrong assertion made in the implementation of the table column (caused by introduction of table column groups).

Please open an OSS message or upgrade to an SP where this is already fixed (which I assume to be).

Armin

[Former Member]

That seems to be a bug in your Web Dynpro version (which one?).

Armin

[Former Member]

Hi Armin,

Thanks for the reply.

I am using SAP NetWeaver® 2004s Support Package Stack 05

Is this the problem ?

please help me

Thanks

Smitha

[Former Member]

version is SAP netweaver studio 7.0.08