Clever Geek Handbook

Setting object namespace dynamically in jaxb marshalling

I have a situation where I need to dynamically set my namespaces for my jaxb classes. my namespace in jaxb classes has a version that needs to be dynamically changed.

 @XmlRootElement(name = "myobject",namespace="http://myhost.com/version-2")
 @XmlAccessorType(XmlAccessType.FIELD)
 @XmlType
 public class myObject{

 }

my marshalling works great when I use this static namespace mechanism, but in my real situation I need this version to change dynamically ..

I tried using this approach to solve this issue when sorting

 XMLStreamWriter xmlStreamWriter =     
 XMLOutputFactory.newInstance().createXMLStreamWriter(stringWriter);
 String uri = "http://myhost.com/ver-"+version;

//xmlStreamWriter.setDefaultNamespace(uri);
xmlStreamWriter.writeStartDocument("1.0");

xmlStreamWriter.writeNamespace("ns1", uri);

my attempt to use setDefaultNamespace was not successful and writeNamespace gave me an error Invalid state: start tag does not open in the entry namespace

Any input on how this can be resolved is much appreciated.

+3


source to share


2 answers


You can implement XMLStreamWriter

that delegates all calls to the original author, but overrides the method writeNamespace(...)

:



public void writeNamespace(String prefix, String uri) {
  if ("http://myhost.com/version-2".equals(uri) {
    uri = "http://myhost.com/version-" + version;
  }
  delegate.writeNamespace(prefix, uri);
}
+2


source


Do you consider using XSL-T transformation? Depending on your schema, it might be relatively easy to replace the namespace after sorting.



+1


source






More articles:


All Articles