Allow custom prefixes for Namespaces

[jlous]

This code:

    public class Ingredients {
        public final String eggs="12";
        @JacksonXmlProperty(namespace = "urn:produce:fruit")
        public final String bananas="6";
        ...
    }

produces this xml when serialised:

  <Ingredients>
    <eggs xmlns="">1</eggs>
    <wstxns1:bananas xmlns:wstxns1="urn:produce:fruit">
      6
    </wstxns1:bananas>
  </Ingredients>

This works, but I'm missing a way to specify the namespace prefix to use, so I could get

  <Ingredients>
    <eggs xmlns="">1</eggs>
    <fruit:bananas xmlns:fruit="urn:produce:fruit">
      6
    </wstxns1:bananas>
  </Ingredients>

An additional argument to @JacksonXmlProperty would be the obvious way.

[cowtowncoder]

Ok, from annotation perspective that could work, although other facilities do not quite exist to pass this information through.

Another possibility would be to pre-declare bindings; to give prefix/URI mapping to either apply to the root element, or as mapping to pass to underlying writer to use if and when necessary.

Doing such mapping is bit tricky from API perspective (since it should be applied via ObjectWriter, ideally, although perhaps use of XmlMapper would suffice), but it is something that could then be quite easily passed to XMLStreamWriter to let it do its job.

[quaos]

Getting stuck on this too, because some services we're consuming do not recognize <wstxns1:SomeOperation> tag :(

[cowtowncoder]

@quaos it would be good to support this, agreed, even though generally I would argue that systems that do not properly handle namespaces (choice of prefix is irrelevant for processing; all that matters is namespace URI it represents.
Still, such systems exist so... shrug :)

I think I'll try to tag this as one of "most-wanted" issues, given thumbs-ups.

[matthall-TM]

any news on this? will this be done or is there another way now? I have seen people writing custom XmlFactories but i would like to avoid this if possible.

basically i have a xhtml link where xhtml should be the prefix instead of wstxns2

[cowtowncoder]

When there are news, there will be update here. No news.

At this point, a contribution for adding functionality would be needed, to implement one or both of ideas (via annotation, or by configuring XmlFactory / XmlMapper.

[cowtowncoder]

Can now be implemented, using FasterXML/jackson-databind#5860 -- need builder-buildable XML-specific GeneratorInitializer and that can add desired namespace/prefix bindings.