[TUSCANY-2871] ClassCastException using atom-abdera binding

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Java-SCA-1.4
• Fix Version/s: Java-SCA-1.5, Java-SCA-1.x
• Component/s: Java SCA ATOM Binding Extension
• Assignee: Luciano Resende
• Reporter: Brent Daniel
• Created: 24/Feb/09 22:54
• Updated: 19/Sep/10 11:30
• Resolved: 09/Apr/09 23:18

Description

If you use the atom-abdera binding with a reference that points to an RSS feed rather than an atom feed, you get a ClassCastException rather than a reasonable error. This occurs in the Tuscany feed-aggregator sample, but the exception is being swallowed in the java implementation.

From FeedAggregator.composite in the feed-aggregator sample (the uri points to an RSS 2.0 feed):
<reference name="atomFeed1">
<tuscany:binding.atom uri="http://www.oreillynet.com/pub/feed/35"/>
</reference>

The following code in AtomBindingInvoker (346-348) results in the ClassCastException:
Document<Feed> doc = abderaParser.parse(new InputStreamReader(getMethod.getResponseBodyAsStream()));
parsing = true;
Feed feed = doc.getRoot();

doc.getRoot() returns an instance of org.apache.abdera.parser.stax.FOMExtensibleElement rather than Feed.

AggregatorImpl in the feed-aggregator sample is swallowing the exception here (85-89):
if (atomFeed1 != null) {
try

{ entries.addAll(atomFeed1.getFeed().getEntries()); }

catch (Exception e) {}
}