[jboss-jira] [JBoss JIRA] Closed: (GPD-178) ClassCastException using Process Designer 3.1.0SP1

ClassCastException using Process Designer 3.1.0SP1 -------------------------------------------------- Key: GPD-178 URL: http://jira.jboss.com/jira/browse/GPD-178 Project: JBoss jBPM GPD Issue Type: Bug Components: jpdl Affects Versions: jBPM jPDL Designer 3.1.0.SP1 Environment: Windows XP, Java 1.6.0_02, Eclipse 3.3, suite_3.2.2 (which packages GPD 3.1.0SP1) Reporter: Ian Priest Assigned To: Koen Aers Fix For: jBPM jPDL Designer 3.2.0.alpha1, jBPM jPDL Designer 3.1.2 Get a ClassCastException using the Process Designer to open the gpd.xml in the websales example provided with the 3.2.2 suite download. The exception is (full stack trace to follow) java.lang.ClassCastException: org.jbpm.gd.jpdl.model.ProcessDefinition cannot be cast to org.jbpm.gd.common.model.GenericElement The problem seems to lie in class GenericElementXmlAdapter, which deals with the classes though the SemanticElement interface, which both classes do implement. The following class reproduces the runtime issue and demonstrates the faulty cast: import org.jbpm.gd.common.model.GenericElement; import org.jbpm.gd.common.model.SemanticElement; import org.jbpm.gd.jpdl.model.ProcessDefinition; public class Play { public static void main(String[] args) { ProcessDefinition pd = new ProcessDefinition(); SemanticElement se = (SemanticElement)pd; GenericElement ge = (GenericElement)se; } } which gives a runtime error: Exception in thread "main" java.lang.ClassCastException: org.jbpm.gd.jpdl.model.ProcessDefinition cannot be cast to org.jbpm.gd.common.model.GenericElement at Play.main(Play.java:15) See also the forum discussion at http://www.jboss.com/index.html?module=bb&op=viewtopic&t=121355 Full stack trace: !ENTRY org.eclipse.ui 4 0 2007-10-16 11:12:33.685 !MESSAGE Unable to create editor ID org.jbpm.gd.jpdl.editor: org.jbpm.gd.jpdl.model.ProcessDefinition cannot be cast to org.jbpm.gd.common.model.GenericElement !STACK 0 java.lang.ClassCastException: org.jbpm.gd.jpdl.model.ProcessDefinition cannot be cast to org.jbpm.gd.common.model.GenericElement at org.jbpm.gd.common.xml.GenericElementXmlAdapter.initialize(Unknown Source) at org.jbpm.gd.common.editor.Editor.getSemanticElement(Unknown Source) at org.jbpm.gd.common.editor.Editor.initSourcePage(Unknown Source) at org.jbpm.gd.common.editor.Editor.createPages(Unknown Source) at org.jbpm.gd.jpdl.editor.JpdlEditor.createPages(Unknown Source) at org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:283) at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:661) at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:426) at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:592) at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:299) at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:179) at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:268) at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65) at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:400) at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1256) at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1209) at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1604) at org.eclipse.ui.internal.PartStack.add(PartStack.java:499) at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:103) at org.eclipse.ui.internal.PartStack.add(PartStack.java:485) at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:112) at org.eclipse.ui.internal.EditorSashContainer.addEditor(EditorSashContainer.java:63) at org.eclipse.ui.internal.EditorAreaHelper.addToLayout(EditorAreaHelper.java:217) at org.eclipse.ui.internal.EditorAreaHelper.addEditor(EditorAreaHelper.java:207) at org.eclipse.ui.internal.EditorManager.createEditorTab(EditorManager.java:774) at org.eclipse.ui.internal.EditorManager.openEditorFromDescriptor(EditorManager.java:673) at org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:634) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2719) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2633) at org.eclipse.ui.internal.WorkbenchPage.access$12(WorkbenchPage.java:2625) at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2577) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:67) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2572) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2556) at org.eclipse.ui.actions.OpenWithMenu.openEditor(OpenWithMenu.java:340) at org.eclipse.ui.actions.OpenWithMenu.access$0(OpenWithMenu.java:328) at org.eclipse.ui.actions.OpenWithMenu$3.handleEvent(OpenWithMenu.java:226) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3682) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3293) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2389) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2353) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2219) at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:153) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:504) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:443) at org.eclipse.equinox.launcher.Main.run(Main.java:1169)