ByteArrayOutputStream out = new ByteArrayOutputStream();
sw.setOutputStream(out).setAutoIndent(true);
ConventionSerializationContext c = new ConventionSerializationContext(sw);
c.setSerializer(MyEntry.class, new EntrySerializer());
sw.startDocument();
c.serialize(new MyEntry());
sw.endDocument();
// once the object has been serialized, we can see that it's a parseable Atom document
ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
Document<Entry> doc = abdera.getParser().parse(in);