From: Mirko Klemm <mirko_at_cm-klemm.de>
Date: Tue, 17 Mar 2015 14:27:03 +0100

Hi Francesca,
The infoset of both XML files is actually identical. Is there a specific reason why you would like to set the namespace prefixes to a specific value? Standard-conforming XML software should not depend on namespace prefixes in a document.
Regards,
Mirko

> Am 2015-03-17 um 14:19 schrieb Herpertz, Francesca <francesca.herpertz_at_bearingpoint.com>:
>
> Hi,
>
> I got a problem with a small unit test I am trying to create.
>
> My test unmarshals an existing XML into a java object (Generated by the XJC plugin via maven) and marshals it back into an XML.
> In the end I am trying to compare both files with one another. Sadly those two files are not the same.
>
> The issue I am having is that JAXB will add a default prefix for the namespace during the marshaling process.
>
> My xml input looks the following:
> <?xml version="1.0"?>
> <validation xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://somenamespace.com/ValidationType" xsi:noNamespaceSchemaLocation="http://somenamespace.com/test/xsd/validation.xsd">
> <module name="B_stat" f001Filter="qualifier&gt;=4 and (a is null or a=0)">
> …
> …
> …
>
>
> What I get as a result looks the following:
>
> <?xml version="1.0"?>
> <ns2:validation xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns2="http://somenamespace.com/ValidationType" xsi:noNamespaceSchemaLocation="http://somenamespace.com/test/xsd/validation.xsd">
> <ns2:module name="B_stat" f001Filter="qualifier&gt;=4 and (a is null or a=0)">
>
> …
> …
> …
>
> My java code looks like this:
>
> private void marshal(String filepath, Validation validation) throws Exception {
> JAXBContext jc = JAXBContext.newInstance(Validation.class);
> Marshaller m = jc.createMarshaller();
> m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
> m.setProperty(Marshaller.JAXB_NO_NAMESPACE_SCHEMA_LOCATION, "http://somenamespace.com/test/xsd/validation.xsd");
> XMLStreamWriter writer = (XMLStreamWriter) XMLOutputFactory
> .newInstance().createXMLStreamWriter(new FileWriter(filepath));
> SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
> Schema schema = factory.newSchema(new File("src/main/resources/xsd/validation.xsd"));
> m.setSchema(schema);
> m.marshal(validation, writer);
> writer.flush();
> writer.close();
>
> }
>
> How would I get rid of the ns2: prefix but keep my xmlns="http://somenamespace.com/ValidationType“ ? I have found several articles which suggest creating a custom mapper. Some also say that the only way to handle this is to traverse the DOM tree after its creation and remove the ns2: prefixes manually. Is there an elegant and by the framework supported way to get the same back what I initially unmashaled?
> Please keep in mind that my Java classes are generated via maven and a change in them would not help me for long (until the next person makes a mvn package ;) )
>
> I would really appreciate some help here.
>
> Thanks and kind regards,
> Francesca Herpertz
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