How to return a custom object from Jazz server to the client

Hi,

As a part of my project, I am a trying to build an object "WINode" in the server side which holds data about WI id, Summary and a hashtable<linktype, arraylist<IWINode>>.
This object is serializable and the client side has an interface for this object.

But when I m trying to return this object from the server to the client, I am getting the following exception,

com.ibm.team.repository.common.transport.ServiceMethodInvocationError: java.lang.ClassCastException: rocketgang.workitem.visualization.model.WINode incompatible with org.eclipse.emf.ecore.EObject



at com.ibm.team.repository.transport.client.RemoteTeamService.getAppropriateException(RemoteTeamService.java:611)

at com.ibm.team.repository.transport.client.RemoteTeamService.executeMethod(RemoteTeamService.java:492)

at com.ibm.team.repository.transport.client.RemoteTeamService.invoke(RemoteTeamService.java:197)

at com.ibm.team.repository.transport.client.ServiceInvocationHandler.invoke(ServiceInvocationHandler.java:43)

at $Proxy41.workitemVisualize(Unknown Source)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:618)

at com.ibm.team.repository.client.internal.ServiceInterfaceProxy.invokeServiceCall(ServiceInterfaceProxy.java:149)

at com.ibm.team.repository.client.internal.ServiceInterfaceProxy.invoke(ServiceInterfaceProxy.java:84)

at $Proxy41.workitemVisualize(Unknown Source)

at rocketgang.workitem.visualization.client.internal.WIVisualizationClientLibrary.workitemVisualize(WIVisualizationClientLibrary.java:33)

at rocketgang.workitem.visualization.client.ui.WorkItemVisualization.run(WorkItemVisualization.java:60)

at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:251)

at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:583)

at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:500)

at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)

at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)

at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)

at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3823)

at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3422)

at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2384)

at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2348)

at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2200)

at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:495)

at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)

at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:490)

at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)

at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)

at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:386)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:618)

at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)

at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)

at org.eclipse.equinox.launcher.Main.run(Main.java:1236)

I tried to search in the jazz forums as how to get an object from the server but couldn't find any. What should I change in the WINode to make it compatible with Ecore objects?
Any help is appreciated.

Thanks,
T.R.Santhosh