public <T> T getInterface(Object thiz, Class<T> iface) throws ScriptException {
if (iface == null || !iface.isInterface()) {
throw new IllegalArgumentException("interface Class expected");
}
AccessControlContext accCtxt = AccessController.getContext();
return iface.cast(
Proxy.newProxyInstance(
iface.getClassLoader(),
new Class[] {iface},
new InterfaceImplementorInvocationHandler(thiz, accCtxt)));
}
public Object invoke(Object proxy, Method method, Object[] args) throws java.lang.Throwable {
// give chance to convert input args
args = convertArguments(method, args);
Object result;
final Method m = method;
final Object[] a = args;
result =
AccessController.doPrivileged(
new PrivilegedExceptionAction<Object>() {
public Object run() throws Exception {
if (thiz == null) {
return engine.invokeFunction(m.getName(), a);
} else {
return engine.invokeMethod(thiz, m.getName(), a);
}
}
},
accCtxt);
// give chance to convert the method result
return convertResult(method, result);
}