AbstractJavaScriptComponent: How to add Javascript function as class member

In our subclass of AbstractJavaScriptComponent we need to be able to set a member of this implemented class to a Javascript function.  I have tried using JSNI to do this, by implementing a native method like this:

public native JavaScriptObject myFunc() /*-{
   $doc.myFunc(date, 'hour', 1);
   }-*/;

public MyComponent extends AbstractJavaScriptComponent {

  private JavaScriptObject funcMember;

  public MyComponent() {
    funcMember = myFunc();
  }
}

However I get an UnsatisfiedLinkError.  I read elsewhere in these forums that one cannot use JSNI in this way.  Can someone recommend an alternative solution?

You're trying to execute Javascript/JSNI in the Server side of your Javascript Component. The code inside MyComponent will only be executed on the Server.
As you're making a custom Javascript Component you should have a Javascript connector file where you can do all of your clientside programming.
So also things like:

function foo(str){
  alert(str);
  document.doSomething=foo;
}
document.doSomething=foo;