Converting from JAXB to Simple XML

Since JAXB doesn't work on Google App Engine but Simple XML does I have been converting my application. I'm using XML in quite a loose way; I have only annotated my classes for the elements and attributes which I want to extract from the larger XML document. JAXB is more forgiving when used in this way, however with a few extra parameters the same can be achieved with Simple XML. Here is a table of a few things I had to convert:

Description	JAXB	Simple XML
The RSS element that is being deserialized has a version attribute on it but I do not wish to model this in the Java class. I only want to deserialize the channel element	@XmlRootElement(name="rss") static class Rss { @XmlElement(name="channel") Channel channel; }	@Root(name="rss", strict=false) static class Rss { @Element(name="channel") Channel channel; }
The channel element contains a list of item elements without any wrapper element enclosing the whole list.	static class Channel { @XmlElement(name="item") List<Item> items; }	@Root(strict=false) static class Channel { @ElementList(entry="item", inline=true) List<Item> items; }
A List with a wrapper element.	@XmlElementWrapper(name="customfieldvalues") @XmlElement(name="customfieldvalue") List<String> customfieldvalues;	@ElementList(entry="customfieldvalue", required=false) List<String> customfieldvalues;
Deserialize	JAXBContext jaxbContext = JAXBContext.newInstance(Rss.class); Unmarshaller unmarshaller = jaxbContext.createUnmarshaller(); Rss rss = (Rss) unmarshaller.unmarshal(in);	Serializer serializer = new Persister(); Rss rss = serializer.read(Rss.class, in);