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Here is what happens during Rome Newsfeed parsing:

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1. Your code calls SyndFeedInput to parse a Newsfeed, for example (see also Using Rome to read a syndication feed):

   Code Block
   URL feedUrl = new URL("file:blogging-roller.rss"); SyndFeedInput input = new SyndFeedInput(); SyndFeed feed = input.build(new InputStreamReader(feedUrl.openStream()));

2. SyndFeedInput delegates to WireFeedInput to do the actual parsing.
3. WireFeedInput uses a PluginManager of class FeedParsers to pick the right parser to use to parse the feed and then calls that parser to parse the Newsfeed.
4. The appropriate parser parses the Newsfeed parses the feed, using JDom, into a WireFeed. If the Newsfeed is in an RSS format, the the WireFeed is of class Channel and contains Items, Clouds, and other RSS things from the com.sun.syndication.feed.rss package. Or, on the other hand, if the Newsfeed is in Atom format, then the WireFeed is of class Feed from the com.sun.syndication.atom package. In the end, WireFeedInput returns a WireFeed.
5. SyndFeedInput uses the returned WireFeedInput to create a SyndFeedImpl. Which implements SyndFeed. SyndFeed is an interface, the root of an abstraction that represents a format independent Newsfeed.
6. SyndFeedImpl uses a Converter to convert between the format specific WireFeed representation and a format-independent SyndFeed.
7. SyndFeedInput returns to you a SyndFeed containing the parsed Newsfeed.

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