How to navigate / process atom entry links in Java?

Question

I need to parse an atom document, where entry links point to other related entries. For example, an entry contains information about an electric meter, and a link points to another entry which contains readings made by that meter. Exact structure is:

https://collaborate.nist.gov/twiki-sggrid/pub/SmartGrid/GreenButtonSDK/ESPISchemaOverview.png

Can anyone give me a tip/starting point? I know basics about XML parsing in Java but navigating between entries using links just boggles my mind.

Answer 1

Using something like ROME to parse the feed would give you the feed as a collection of Entry objects. Each Entry has a collection of Link s, including possible a link to itself ( rel='self' ) to assign a permalink.

Navigating between entries may well involve iterating over all the entries to find the target, or you could build your own Map . This doesn't take care of the logic of making the appropriate connections due to the links but it does get you the data in terms of identifiers and links.