GWT Designer can't compile some visual classes

[lkdev]

I have an own widget library and a lot of visual and non-visual components. Since a time ago I have some designer timer compiler errors with some GWT classes (at running time I don't have these problems).

The GWT class loader fires a ClassNotFoundException, but the class does exist and is available. Is there a way to better analyse the problem to solve it ?

Here is the full stack trace:

Plug-in Provider: Instantiations
Plug-in Name: WindowBuilder Professional
Plug-in ID: com.swtdesigner
Plug-in Version: 6.9.0.200902030522

java.lang.ClassNotFoundException: de.dic.web.gui.library.comps.SPStackPanel
at com.google.gwt.dev.shell.CompilingClassLoader.findClass(CompilingClassLoader.java:610)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at com.swtdesigner.gwt.model.widgets.support.GWTState.loadClass(GWTState.java:552)
at com.swtdesigner.gwt.model.widgets.UIObjectInfo.classByName(UIObjectInfo.java:191)
at com.swtdesigner.gwt.model.widgets.UIObjectInfo.<init>(UIObjectInfo.java:68)
at com.swtdesigner.gwt.model.widgets.WidgetInfo.<init>(WidgetInfo.java:56)
at com.swtdesigner.gwt.model.widgets.panel.AbstractContainerInfo.<init>(AbstractContainerInfo.java:37)
at com.swtdesigner.gwt.model.widgets.panel.PanelInfo.<init>(PanelInfo.java:25)
at com.swtdesigner.gwt.model.widgets.panel.ComplexPanelInfo.<init>(ComplexPanelInfo.java:26)
at com.swtdesigner.gwt.model.widgets.panel.StackPanelInfo.<init>(StackPanelInfo.java:38)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.swtdesigner.gwt.model.GWTJavaInfoFactory.create(GWTJavaInfoFactory.java:163)
at com.swtdesigner.model.parser.factory.JavaInfoFactory.create(JavaInfoFactory.java:114)
at com.swtdesigner.model.parser.factory.JavaInfoFactory.create(JavaInfoFactory.java:97)
at com.swtdesigner.model.parser.factory.JavaInfoFactory.create(JavaInfoFactory.java:90)
at com.swtdesigner.model.parser.JavaInfoParser$ParserVisitor.endVisit(JavaInfoParser.java:1478)
at org.eclipse.jdt.core.dom.ClassInstanceCreation.accept0(ClassInstanceCreation.java:337)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChild(ASTNode.java:2525)
at org.eclipse.jdt.core.dom.VariableDeclarationFragment.accept0(VariableDeclarationFragment.java:225)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2548)
at org.eclipse.jdt.core.dom.VariableDeclarationStatement.accept0(VariableDeclarationStatement.java:273)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2548)
at org.eclipse.jdt.core.dom.Block.accept0(Block.java:136)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChild(ASTNode.java:2525)
at org.eclipse.jdt.core.dom.MethodDeclaration.accept0(MethodDeclaration.java:502)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at com.swtdesigner.model.parser.JavaInfoParser$ParserVisitor.visit(JavaInfoParser.java:3145)
at org.eclipse.jdt.core.dom.TypeDeclaration.accept0(TypeDeclaration.java:467)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2548)
at org.eclipse.jdt.core.dom.CompilationUnit.accept0(CompilationUnit.java:214)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at com.swtdesigner.model.parser.JavaInfoParser.parse(JavaInfoParser.java:323)
at com.swtdesigner.gef.DesignerEditor.parseCompilationUnit(DesignerEditor.java:1204)
at com.swtdesigner.gef.DesignerEditor$18.execute(DesignerEditor.java:1129)
at com.swtdesigner.model.swing.properties.custom.DesignTimeHelper.execute(DesignTimeHelper.java:54)
at com.swtdesigner.gef.DesignerEditor.handleActivate(DesignerEditor.java:1123)
at com.swtdesigner.gef.DesignerEditor.handleActivate(DesignerEditor.java:1114)
at com.swtdesigner.editors.MultiPageEditor.showDesignEditor(MultiPageEditor.java:397)
at com.swtdesigner.editors.MultiPageEditor.switchSourceDesign(MultiPageEditor.java:455)
at com.swtdesigner.actions.editor.SwitchAction.run(SwitchAction.java:12)
at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:251)
at org.eclipse.ui.commands.ActionHandler.execute(ActionHandler.java:185)
at org.eclipse.ui.internal.handlers.LegacyHandlerWrapper.execute(LegacyHandlerWrapper.java:109)
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.executeCommand(WorkbenchKeyboard.java:472)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.press(WorkbenchKeyboard.java:824)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.processKeyEvent(WorkbenchKeyboard.java:882)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.filterKeySequenceBindings(WorkbenchKeyboard.java:571)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.access$3(WorkbenchKeyboard.java:512)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard$KeyDownFilter.handleEvent(WorkbenchKeyboard.java:127)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1184)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1002)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1027)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1012)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1040)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1036)
at org.eclipse.swt.widgets.Widget.wmKeyDown(Widget.java:1653)
at org.eclipse.swt.widgets.Control.WM_KEYDOWN(Control.java:4122)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:3818)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:337)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4541)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2371)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3420)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2382)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2346)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2198)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:493)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:488)
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(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:549)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
at org.eclipse.equinox.launcher.Main.run(Main.java:1236)

Full stack trace (to see full context):
org.apache.commons.lang.exception.NestableError: com.swtdesigner.properties.PropertyException: java.lang.reflect.InvocationTargetException
at com.swtdesigner.model.parser.factory.JavaInfoFactory.create(JavaInfoFactory.java:120)
at com.swtdesigner.model.parser.factory.JavaInfoFactory.create(JavaInfoFactory.java:97)
at com.swtdesigner.model.parser.factory.JavaInfoFactory.create(JavaInfoFactory.java:90)
at com.swtdesigner.model.parser.JavaInfoParser$ParserVisitor.endVisit(JavaInfoParser.java:1478)
at org.eclipse.jdt.core.dom.ClassInstanceCreation.accept0(ClassInstanceCreation.java:337)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChild(ASTNode.java:2525)
at org.eclipse.jdt.core.dom.VariableDeclarationFragment.accept0(VariableDeclarationFragment.java:225)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2548)
at org.eclipse.jdt.core.dom.VariableDeclarationStatement.accept0(VariableDeclarationStatement.java:273)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2548)
at org.eclipse.jdt.core.dom.Block.accept0(Block.java:136)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChild(ASTNode.java:2525)
at org.eclipse.jdt.core.dom.MethodDeclaration.accept0(MethodDeclaration.java:502)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at com.swtdesigner.model.parser.JavaInfoParser$ParserVisitor.visit(JavaInfoParser.java:3145)
at org.eclipse.jdt.core.dom.TypeDeclaration.accept0(TypeDeclaration.java:467)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2548)
at org.eclipse.jdt.core.dom.CompilationUnit.accept0(CompilationUnit.java:214)
at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2478)
at com.swtdesigner.model.parser.JavaInfoParser.parse(JavaInfoParser.java:323)
at com.swtdesigner.gef.DesignerEditor.parseCompilationUnit(DesignerEditor.java:1204)
at com.swtdesigner.gef.DesignerEditor$18.execute(DesignerEditor.java:1129)
at com.swtdesigner.model.swing.properties.custom.DesignTimeHelper.execute(DesignTimeHelper.java:54)
at com.swtdesigner.gef.DesignerEditor.handleActivate(DesignerEditor.java:1123)
at com.swtdesigner.gef.DesignerEditor.handleActivate(DesignerEditor.java:1114)
at com.swtdesigner.editors.MultiPageEditor.showDesignEditor(MultiPageEditor.java:397)
at com.swtdesigner.editors.MultiPageEditor.switchSourceDesign(MultiPageEditor.java:455)
at com.swtdesigner.actions.editor.SwitchAction.run(SwitchAction.java:12)
at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:251)
at org.eclipse.ui.commands.ActionHandler.execute(ActionHandler.java:185)
at org.eclipse.ui.internal.handlers.LegacyHandlerWrapper.execute(LegacyHandlerWrapper.java:109)
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.executeCommand(WorkbenchKeyboard.java:472)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.press(WorkbenchKeyboard.java:824)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.processKeyEvent(WorkbenchKeyboard.java:882)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.filterKeySequenceBindings(WorkbenchKeyboard.java:571)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard.access$3(WorkbenchKeyboard.java:512)
at org.eclipse.ui.internal.keys.WorkbenchKeyboard$KeyDownFilter.handleEvent(WorkbenchKeyboard.java:127)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1184)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1002)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1027)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1012)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1040)
at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1036)
at org.eclipse.swt.widgets.Widget.wmKeyDown(Widget.java:1653)
at org.eclipse.swt.widgets.Control.WM_KEYDOWN(Control.java:4122)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:3818)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:337)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4541)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2371)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3420)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2382)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2346)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2198)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:493)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:488)
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(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:549)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)
at org.eclipse.equinox.launcher.Main.run(Main.java:1236)
Caused by: com.swtdesigner.properties.PropertyException: java.lang.reflect.InvocationTargetException
at com.swtdesigner.gwt.model.GWTJavaInfoFactory.create(GWTJavaInfoFactory.java:171)
at com.swtdesigner.model.parser.factory.JavaInfoFactory.create(JavaInfoFactory.java:114)
... 79 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.swtdesigner.gwt.model.GWTJavaInfoFactory.create(GWTJavaInfoFactory.java:163)
... 80 more
Caused by: org.apache.commons.lang.exception.NestableError: java.lang.ClassNotFoundException: de.dic.web.gui.library.comps.SPStackPanel
at com.swtdesigner.gwt.model.widgets.UIObjectInfo.classByName(UIObjectInfo.java:193)
at com.swtdesigner.gwt.model.widgets.UIObjectInfo.<init>(UIObjectInfo.java:68)
at com.swtdesigner.gwt.model.widgets.WidgetInfo.<init>(WidgetInfo.java:56)
at com.swtdesigner.gwt.model.widgets.panel.AbstractContainerInfo.<init>(AbstractContainerInfo.java:37)
at com.swtdesigner.gwt.model.widgets.panel.PanelInfo.<init>(PanelInfo.java:25)
at com.swtdesigner.gwt.model.widgets.panel.ComplexPanelInfo.<init>(ComplexPanelInfo.java:26)
at com.swtdesigner.gwt.model.widgets.panel.StackPanelInfo.<init>(StackPanelInfo.java:38)
... 85 more
Caused by: java.lang.ClassNotFoundException: de.dic.web.gui.library.comps.SPStackPanel
at com.google.gwt.dev.shell.CompilingClassLoader.findClass(CompilingClassLoader.java:610)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at com.swtdesigner.gwt.model.widgets.support.GWTState.loadClass(GWTState.java:552)
at com.swtdesigner.gwt.model.widgets.UIObjectInfo.classByName(UIObjectInfo.java:191)
... 91 more

Designer Configuration Details:

Product: WindowBuilder Professional
Version: 6.9.0.200902030522
Expected: Eclipse 3.4
Actual: Eclipse 3.4.0.v20080512
Actual Eclipse Build Name:
Actual Eclipse Build ID: M20080709-0800
IDE Actual Name: Eclipse
IDE Actual Version: 3.3.101.v200809111700
IDE Actual NL: de_DE
Physical Address: 00-18-8B-BA-9D-46, HardwareAddress[00-16-41-DD-CE-C7], HardwareAddress[00-19-D2-AE-A7-8F]
Code Gen: Flat Mode, Use Existing, First Assignment, Make Final
Events: Anonymous Class
GWT Home: X:/sdk/platform/gwt15
Platform Product: Eclipse
Platform Version: 3.3.101.v200809111700
OS Name: Windows XP
OS Architecture: x86
OS Version: 5.1

Thanks !

[Eric Clayberg]

Since you are using a fairly old version of the product, please update to the latest v6.9.2 or v7.1 build and try this again.

If that does not help, please send us a test case.

[lkdev]

Thank you Eric,
I try it and will post the result here !

[Eric Clayberg]

OK

[lkdev]

After installation of the latest Eclipse with WindowBuilder Pro plugin I could found the problem in my own code because the log file is better than before.
Thanks and have a nice developer day.

[Eric Clayberg]

Glad to hear it is working for you now.