Java - ClassLoader desde Plugin de Eclipse

HOla a Todos

Bueno el problema es el siguiente necesito cargar una clase de cualquier ubicacion
del sistema operativo lo cual ya lo hace cuando creo un java project
con el siguiente codigo

String pathClazzes = "file:/"+ "C:/suma/";
URL url;
try {
url = new URL(pathClazzes);

URL[] urls = new URL[1];
urls[0] = url;
ClassLoader classLoader = new URLClassLoader(urls);
Class class1 = classLoader.loadClass("test.SumaStub");
System.out.println(class1.getName());
System.out.println(class1.getMethods().length);
for (Method method : class1.getMethods()) {
System.out.println(method.getName());

}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

Carga la clase Y muestra el total de metodos y nombre de cada uno de los metodos de la clase
Aqui viene el problema cuando lo quiero ejecutar este framento de codigo en un plugin Project

Muestra el siguiente error
java.lang.reflect.InvocationTargetException
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:383)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:313)
at org.eclipse.jface.wizard.WizardDialog.run(WizardDialog.java:934)
at org.apache.axis2.tool.codegen.eclipse.CodeGenWizard.doFinishWSDL2Java(CodeGenWizard.java:406)
at org.apache.axis2.tool.codegen.eclipse.CodeGenWizard.performFinish(CodeGenWizard.java:186)
at org.eclipse.jface.wizard.WizardDialog.finishPressed(WizardDialog.java:742)
at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:373)
at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:616)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:227)
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.jface.window.Window.runEventLoop(Window.java:820)
at org.eclipse.jface.window.Window.open(Window.java:796)
at org.eclipse.ui.actions.NewWizardAction.run(NewWizardAction.java:182)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:545)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:490)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:402)
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)
at org.eclipse.equinox.launcher.Main.main(Main.java:1144)
Caused by: java.lang.NoClassDefFoundError: org/apache/axis2/client/Stub
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at gwork.ws.api.model.core.GworkDelegate.generateDelegate(GworkDelegate.java:54)
at org.apache.axis2.tool.codegen.eclipse.CodeGenWizard$1.execute(CodeGenWizard.java:367)
at org.eclipse.ui.actions.WorkspaceModifyOperation$1.run(WorkspaceModifyOperation.java:101)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1797)
at org.eclipse.ui.actions.WorkspaceModifyOperation.run(WorkspaceModifyOperation.java:113)
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:369)
... 44 more

Gracias por la atencion prestada

Te faltan clases en la traza tienes esto:

algun jar para axis2

Caused by: java.lang.NoClassDefFoundError: org/apache/axis2/client/Stub

Saludos

Pero mi pregunta es Yo lo pruebo desde un java project y funciona
Que debe hacer para que funcione desde el plugin ?

Gracias

Segun la traza no estan cargas esas clases si estan disponibles los jars para el plugin que estas desarrollando?

Si debe agregarlo pero al classpath en tiempo de ejecucion ese .jar axis2

como lo puedo montar al classpath en tiempo de ejecucion ;