[kepler-dev] odd recent change to BasicZList

[ian.brown@hsbcib.com]

Hi,
        I'm just synching my local source to the latest ptolemy souce 
tarball.
I noticed that BasicZList.java has been changed.
I don't like the change made to BasicZList$GSet.figuresFromFront (approx 
line 251).

Previously it was:

        public Iterator figuresFromFront() {
            return new Iterator() {
                int cursor = _currentFigures.size();

                public boolean hasNext() {
                    return cursor > 0;
                }

                public Object next() {
                    cursor--;
                    return _currentFigures.get(cursor);
                }

                public void remove() {
                    throw new UnsupportedOperationException(
                            "Cannot delete figure from geometric set");
                }
            };
        }


and it has been changed to:

        public Iterator figuresFromFront() {
            return new Iterator() {
                int cursor = _currentFigures.size();

                public boolean hasNext() throws NoSuchElementException {
                    return cursor > 0;
                }

                public Object next() {
                    if (cursor <= 0) {
                        throw new NoSuchElementException("Can't get " + 
cursor
                                + "'th element from BasicZList of size "
                                + _currentFigures.size());
                    }
                    cursor--;
                    return _currentFigures.get(cursor);
                }

                public void remove() {
                    throw new UnsupportedOperationException(
                            "Cannot delete figure from geometric set");
                }
            };
        }

It looks as though the throws designator has been added to the wrong 
member. I think it should have been added to next() and not hasNext().

Ian



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