ClassCastException when method returns java.util.Optional --------------------------------------------------------- Key: FURNACE-104 URL: https://issues.jboss.org/browse/FURNACE-104 Project: Forge: Furnace Issue Type: Feature Request Components: ClassLoader Adapter Affects Versions: 2.23.0.Final Environment: Eclipse Reporter: George Gastaldi Assignee: George Gastaldi Fix For: 2.23.1.Final When declaring an API that returns a {{java.util.Optional}} object, the following error is thrown: {code} java.lang.ClassCastException: org.javassist.tmp.java.lang.reflect.Member_$$_javassist_eca8918e-7b7f-417e-a7d0-76b7ad842368 cannot be cast to java.util.Optional at org.jboss.forge.addon.ui.context.UISelection_$$_javassist_71d3f1cb-f8e7-4108-92f7-51f1dd0f8d3e.getSelectedRegionFor(UISelection_$$_javassist_71d3f1cb-f8e7-4108-92f7-51f1dd0f8d3e.java) at org.jboss.forge.addon.ui.example.commands.ShowSelectedRegionCommand.execute(ShowSelectedRegionCommand.java:48) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at org.jboss.forge.furnace.proxy.ClassLoaderInterceptor$1.call(ClassLoaderInterceptor.java:87) at org.jboss.forge.furnace.util.ClassLoaders.executeIn(ClassLoaders.java:42) at org.jboss.forge.furnace.proxy.ClassLoaderInterceptor.invoke(ClassLoaderInterceptor.java:103) at org.jboss.forge.addon.ui.example.commands.ShowSelectedRegionCommand_$$_javassist_ddbfd754-b96b-495f-ac6e-ca1184ff58ab.execute(ShowSelectedRegionCommand_$$_javassist_ddbfd754-b96b-495f-ac6e-ca1184ff58ab.java) at org.jboss.forge.addon.ui.impl.controller.SingleCommandControllerImpl.execute(SingleCommandControllerImpl.java:95) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback$2.call(ClassLoaderAdapterCallback.java:123) at org.jboss.forge.furnace.util.ClassLoaders.executeIn(ClassLoaders.java:42) at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback.invoke(ClassLoaderAdapterCallback.java:96) at org.jboss.forge.addon.ui.controller.CommandController_$$_javassist_d61043ab-f45c-4ed0-b9c7-6c5898baad65.execute(CommandController_$$_javassist_d61043ab-f45c-4ed0-b9c7-6c5898baad65.java) at org.jboss.tools.forge.ui.internal.ext.wizards.ForgeWizard$1.run(ForgeWizard.java:113) at org.eclipse.jface.window.ApplicationWindow.run(ApplicationWindow.java:696) at org.jboss.tools.forge.ui.internal.ext.wizards.ForgeWizard.performFinish(ForgeWizard.java:97) at org.jboss.tools.forge.ui.internal.ext.dialog.WizardDialogHelper.openWizard(WizardDialogHelper.java:204) at org.jboss.tools.forge.ui.internal.ext.dialog.WizardDialogHelper.openWizard(WizardDialogHelper.java:102) at org.jboss.tools.forge.ui.internal.ext.dialog.UICommandListDialog$1$1.handleElementSelected(UICommandListDialog.java:233) at org.jboss.tools.forge.ui.internal.ext.quickaccess.QuickAccessContents.handleSelection(QuickAccessContents.java:322) at org.jboss.tools.forge.ui.internal.ext.quickaccess.QuickAccessContents.access$0(QuickAccessContents.java:312) at org.jboss.tools.forge.ui.internal.ext.quickaccess.QuickAccessContents$6.mouseUp(QuickAccessContents.java:461) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:220) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4481) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1329) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3819) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3430) 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) {code}