Paginate Observable results without recursion - RxJava

Question

I\'ve got a pretty standard API pagination problem which you can handle with some simple recursion. Here\'s a fabricated example:

public Observable

        

Answer 1

Just an idea, why wouldnt you implement your own iterable that iterates over your pages and then make an observer from it?

Example :

Observable.from(new Iterable() {

        @Override
        public Iterator iterator() {
            return new Iterator() {
                @Override
                public boolean hasNext() {
                    return hasNextPage(currentPageKey);
                }

                @Override
                public T next() {

                    page = getNextPage(currentPageKey);
                    currentPageKey = page.getKey();
                    return page;
                }

                @Override
                public void remove() {
                    throw new UnsupportedOperationException();
                }
            };
        }
    });

a more elegant way would be to make your page manager (the scanner variable in your code example i believe) implement iterable and write the iteration logic there.