How to use

getClassField

method

in

org.eclipse.jetty.util.WebAppLoaderFix

private static HashSet<String> preClose(URLClassLoader loader)
  Field f = getClassField(URLClassLoader.class, "ucp");
  if (f != null)
      f = getClassField(ucp.getClass(), "loaders");
      if (f != null)
          f = getClassField(obj.getClass(), "jar");
          if (f != null)

Field f = getClassField(classJarURLConnection, "factory");
f = getClassField(classJarFileFactory, "fileCache");
if (f == null)
f = getClassField(classJarFileFactory, "urlCache");
if (f == null)