java.lang.ClassCastException

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  • java.lang.ClassCastException: java.util.ArrayList cannot be cast to org.eclipse.gef.EditPart at org.eclipse.triquetrum.workflow.editor.palette.ui.PaletteTreeViewer.findObjectAtExcluding(PaletteTreeViewer.java:127) at org.eclipse.gef.tools.TargetingTool.updateTargetUnderMouse(TargetingTool.java:425) at org.eclipse.gef.tools.TargetingTool.unlockTargetEditPart(TargetingTool.java:388) at org.eclipse.gef.tools.SelectionTool.handleNativeDragFinished(SelectionTool.java:396) at org.eclipse.gef.tools.AbstractTool.nativeDragFinished(AbstractTool.java:1247) at org.eclipse.gef.EditDomain.nativeDragFinished(EditDomain.java:330) at org.eclipse.gef.ui.parts.DomainEventDispatcher.dispatchNativeDragFinished(DomainEventDispatcher.java:396) at org.eclipse.gef.ui.parts.GraphicalViewerImpl$1$TheLastListener.dragFinished(GraphicalViewerImpl.java:376) at org.eclipse.swt.dnd.DNDListener.handleEvent(DNDListener.java:45) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4230) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1491) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1514) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1499) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1299) at org.eclipse.swt.dnd.DragSource.draggedImage_endedAt_operation(DragSource.java:445) at org.eclipse.swt.dnd.DragSource.dragSourceProc(DragSource.java:562) at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method) at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:227) at org.eclipse.swt.widgets.Widget.mouseDownSuper(Widget.java:1121) at org.eclipse.swt.widgets.Tree.mouseDownSuper(Tree.java:2047) at org.eclipse.swt.widgets.Widget.mouseDown(Widget.java:1113) at org.eclipse.swt.widgets.Control.mouseDown(Control.java:2569) at org.eclipse.swt.widgets.Tree.mouseDown(Tree.java:2015) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5692) at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method) at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:227) at org.eclipse.swt.widgets.Widget.windowSendEvent(Widget.java:2130) at org.eclipse.swt.widgets.Shell.windowSendEvent(Shell.java:2337) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5756) at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method) at org.eclipse.swt.widgets.Display.applicationSendEvent(Display.java:5193) at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5342) at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method) at org.eclipse.swt.internal.cocoa.NSApplication.sendEvent(NSApplication.java:128) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3695) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337) at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018) at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:654) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:598) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:139) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608) at org.eclipse.equinox.launcher.Main.run(Main.java:1515) at org.eclipse.equinox.launcher.Main.main(Main.java:1488)
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