Method unwrapTo

storm-client/src/jvm/org/apache/storm/utils/Utils.java:475–483

(Class<T> klass, Throwable t)

    }

    public static <T extends Throwable> T unwrapTo(Class<T> klass, Throwable t) {
        while (t != null) {
            if (klass.isInstance(t)) {
                return (T) t;
            }
            t = t.getCause();
        }
        return null;
    }

    public static <T extends Throwable> void unwrapAndThrow(Class<T> klass, Throwable t) throws T {
        T ret = unwrapTo(klass, t);