pass a function to java dynamic proxy's invoke function using args parameter

Suppose I have below scala code using dynamic proxy (my only question is embedded):

trait IClient
{
  def execute[R](func: IClient=>R) : R
}

class MyInvocationHandler extends InvocationHandler {
  def invoke(proxy: Any, method: Method, args: Array[AnyRef]): AnyRef = {
    // can I restore func passed by args and execute it here?
    null
  }
}

class factory[P: ClassTag]() {
  val clientClass = implicitly[ClassTag[P]].runtimeClass

  def getProxy() : P = java.lang.reflect.Proxy.newProxyInstance(
    getClass.getClassLoader,
    Array(clientClass),
    new MyInvocationHandler()).asInstanceOf[P]
}

def main(): Int = {
  // can the function (a: IClient)=>{0} be passed to invoke to execute?
  (new factory[IClient]).getProxy().execute((a: IClient) => { 0 })
}

Appreciate any clue!