public AtomicJointSet(ArrayList children,
    FSet fSet) 
{
        super(children, fSet);
}

 protected String getName() 
{
        return "NonCapJointSet"; //$NON-NLS-1$
}

 public AbstractSet getNext() 
{
        return next;
}

 public int matches(int stringIndex,
    CharSequence testString,
    MatchResultImpl matchResult) 
{
        int start = matchResult.getConsumed(groupIndex);
        matchResult.setConsumed(groupIndex, stringIndex);
        int size = children.size();
        for (int i = 0; i <  size; i++) {
            AbstractSet e = (AbstractSet) children.get(i);
            int shift = e.matches(stringIndex, testString, matchResult);
            if (shift  >= 0) {
                // AtomicFset always returns true, but saves the index to run
                // this next.match() from;
                return next.matches(((AtomicFSet) fSet).getIndex(), testString,
                        matchResult);
            }
        }
        matchResult.setConsumed(groupIndex, start);
        return -1;
}

Returns stringIndex+shift, the next position to match

 public  void setNext(AbstractSet next) 
{
        this.next = next;
}