Unable to create extension with nested type.

[Former user]

I am trying to write an extension for the following XML.

<call xmlns='voiceaxis:state' id='1'><extension pbx_id='40277'/></call>

The outer <call> object works fine as an extension, but if I add a nested xml/java type for extension, (using an XmlJavaAdapter) the adapter never gets called.

I suspect that there may be an error when dealing with tags like <element/> rather than <element></element>

[Shahed Moolji]

Some further info :- My type adapter does get called, but the String value to unmarshal is empty.

While this may make sense, the issue is that I cannot get the attributes of the <extension> tag.

The outer <call> tag is similarly empty, but it is of the form <call></call>, and for this element, JAXB does marshall the xml to java correctly.

[Christian Schudt]

This is more of a general JAXB question. Have you tried adding a namespace declaration for each @XmlElement and each @XmlAttribute? It's not sufficient to only put in the @XmlRootElement.

Alternatively, create a package-info.java. This is what I'd prefer.

[Shahed Moolji]

Yes, but not a package-info.java .. will try that as well.

On another note, is it not possible for the API to simply return the "original" events as a String ?

If I don't want to use extensions I need to type cast the payload of an event/item to an XML Node and then use low level API calls to get to its attributes. It would be nice if there was a way to get it back as a string.

[Shahed Moolji]

Thanks ! Adding package-info.java resolved it !!

[Christian Schudt]

Great! Getting the XML as String back is not quite that easy, I see no way actually. It's all built upon JAXB, so you really have to use Marshaller for a String representation.

If you don't use your extension, JAXB unmarshalls unknown XML as org.dom.Element, where you could use low-level API, but I guess you won't need it.