First things first

In order to communicate with an EOEditingContext through a web service, the first step is to create a Java object to wrap it, say BAEditingContext.java. Mine, looks like:

public class BAEditingContext {
   public EOEditingContext eoec;
   public BAEditingContext() {
      super();
      eoec = new EOEditingContext();
   }
   public String test(){
      return eoec.toString();
   }
}

We can check that initialisation was correct through the test method (recall how to publish a method in Consuming Calculator): add a line of the form

NSLog(@"eoec = %@",[BAEditingContextService test]);

and you will receive in your console something like

... eoec = com.webobjects.eocontrol.EOEditingContext@998537

The question now is: how to consume Enterprise Objects?
as serialised objects?
as dictionaries?

Let us see how does EOCustomObject traverses the service...