Question

I get the following exception when I attempt to unmarshall XML back into java code. It seems like I am missing the namespace declaration somewhere, but I am not sure where.

javax.xml.bind.UnmarshalException: unexpected element (uri:"", local:"wg_provider").
Expected elements are <{http://www.warriorgateway.org/WGProvider.xsd}wg_provider>

This file was originally created with a JAXB marshaller here:

    JAXBContext providerContext = JAXBContext.newInstance(WgProvider.class);
    Marshaller providerMarshaller = providerContext.createMarshaller();
    providerMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
    StringWriter providerWriter = new StringWriter();
    providerMarshaller.marshal(provider, providerWriter);

Here is the top of the Schema file:

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    targetNamespace="http://www.warriorgateway.org/WGProvider.xsd"
    xmlns:ns1="http://www.warriorgateway.org/WGProvider.xsd"
    elementFormDefault="qualified">

    <xsd:element name="wg_provider">
        <xsd:complexType>

Here is the the top of the XML file to be unmarshalled:

<?xml version="1.0" encoding="UTF-8"?>
<wg_provider xmlns="http://www.warriorgateway.org/WGProvider.xsd">
    <ein>26-0081701</ein>
    <name>MOMS CLUB</name>
    <is_virtual>false</is_virtual>
    <description>
</description>

Here is the top of the JAXB generated Java file:

@XmlRootElement(name = "wg_provider" )
public class WgProvider {

I tried adding the namespace element to the Annotation but it made no difference.

Here is the package-info.xml content:

@javax.xml.bind.annotation.XmlSchema(namespace = "http://www.warriorgateway.org/WGProvider.xsd", elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED)
package org.warriorgateway.api.model.wg;

And finally here is the unmarshalling code:

for (String wrappedProviderXML : wrappedProviderXMLList) {

    DocumentBuilderFactory documentbuilderFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder documentbuilder = documentbuilderFactory.newDocumentBuilder();
    ByteArrayInputStream xmlStream = new ByteArrayInputStream(wrappedProviderXML.getBytes());
    Document providerXMLDocument = documentbuilder.parse(xmlStream);

    JAXBContext wgProviderContext;
    try {
        wgProviderContext = JAXBContext.newInstance(WgProvider.class);
        Unmarshaller wgProviderUnmarshaller = wgProviderContext.createUnmarshaller();

        WgProvider wgProvider = (WgProvider) wgProviderUnmarshaller.unmarshal(providerXMLDocument);
    } catch (JAXBException ex) {
        Logger.getLogger(MainController.class.getName()).log(Level.SEVERE, null, ex);
    }

Thanks-in-advance,

Guido

P.S. I am using Netbeans 7 to generate the bindings.

Answer 1

In your sample you need to set your DocumentBuilderFactory to be namespace aware:

DocumentBuilderFactory documentbuilderFactory = DocumentBuilderFactory.newInstance();
documentbuilderFactory.setNamespaceAware(true);

You could also unmarshal the ByteArrayInputStream directly:

unmarshaller.unmarshal(xmlStream);