Re: A design and coding question: If some1 can help

Hi all,

I got into an infinite loop problem when trying to do the following:

// Result
public class Result
{
  private List<Listener> listeners = new ArrayList<Listener>();
  private List<String> log = new ArrayList<String();

  public void addListener(Listener listener)
  {
      list.add(listener);
  }

  public void add(String str)
  {
     // allows the use of listener to process the result. This is
like an observer/observable
     // pattern
     log.add(str);
     for(Listener each: listeners)
     {
        each.add(str);<-------- likely a problem here.
     }
  }
}

// Task - each task has it owns result instance.
public class Task
{
  private Result result = new Result();
  public Result getResult()
  {
     return result();
  }
}

// ProblematicConstruct
public class ProblematicConstruct implements Listener
{
  private Result result;
  Problem(Result result)
  {
     this.result = result
  }

  public void add(String s)
  {
     //?????????? this will goes into an infinite loop ???????
     result.add(s);
  }
}

Can some one gives some advice or help on how to resolve it? Since
there is not way to restrict people from doing the above Problematic
construct.

Thanks,
Kae