Re: [aerogear-dev] iOS Reddit Paging

For the Reddit case and for others that may come in the future which may have "unknown" paging mechanisms, I followed the approach Android does and introduced a PageExtractor interface. It's only purpose is to parse the appropriate content and return us with the "next" and "previous" links. Existing header/body mechanisms were refactored to separate classes that implement the PageExtractor interface. Further an additional configuration option in the PipeConfig was added [setPageExtractor] that set the appropriate extractor class.

Important to state is that this config option is entirely optional. Internally if not set, we will still use the appropriate page/header mechanism (still depending on the metadataLocation config option). Having this option will allow different and "exotic" page extractors to be plugged in by the users if necessary or if not still rely on our defaults.