How to resolve unmarshalling exception? - jaxb

Question

I am trying to learn JAXB. I created sample as below, but during unmarshalling i am getting exception. My files are below. Can you help me to resolve?
AddRequest.java:
#XmlAccessorType(XmlAccessType.FIELD)
#XmlType(name = "AddRequest", namespace = "http://www.example.org/AddRequest", propOrder = {
"first",
"sec",
"any"
})
public class AddRequest {
#XmlElement(name = "First")
protected int first;
#XmlElement(name = "Sec")
protected int sec;
#XmlAnyElement(lax = true)
protected List<Object> any;
}
ObjectFactory.java
#XmlRegistry
public class ObjectFactory {
private final static QName _AddRequest_QNAME = new QName("http://www.example.org/AddRequest", "AddRequest");
public ObjectFactory() {
}
public AddRequest createAddRequest() {
return new AddRequest();
}
#XmlElementDecl(namespace = "http://www.example.org/AddRequest", name = "AddRequest")
public JAXBElement<AddRequest> createAddRequest(AddRequest value) {
return new JAXBElement<AddRequest>(_AddRequest_QNAME, AddRequest.class, null, value);
}
}
package-info.java
#javax.xml.bind.annotation.XmlSchema(namespace = "http://www.example.org/AddRequest", elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED)
package org.example.addrequest;
Main.java
try {
File file = new File("C:\\Users\\nbkyooh\\IBM\\rationalsdp\\workspace\\Sample\\resource\\AddRequest.xml");
JAXBContext jaxbContext = JAXBContext.newInstance(org.example.addrequest.AddRequest.class);
Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
jaxbUnmarshaller.unmarshal(file);
} catch (JAXBException e) {
e.printStackTrace();
}
AddRequest.xml
<?xml version="1.0" encoding="UTF-8"?>
<tns:AddRequest xmlns:tns="http://www.example.org/AddRequest" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.example.org/AddRequest AddRequest.xsd ">
<tns:First>0</tns:First>
<tns:Sec>0</tns:Sec>
</tns:AddRequest>
I am getting exception as below, what i have done wrong. I used all the generated files.
javax.xml.bind.UnmarshalException: Unexpected element "{http://www.example.org/AddRequest}AddRequest". Expected elements are "".
at com.ibm.xml.xlxp2.jaxb.msg.JAXBMessageProvider.throwUnmarshalExceptionWrapper(JAXBMessageProvider.java:93)
at com.ibm.xml.xlxp2.jaxb.unmarshal.impl.DeserializationContext.handleSkippedRootElementEvent(DeserializationContext.java:318)
at com.ibm.xml.xlxp2.jaxb.unmarshal.impl.JAXBDocumentScanner.produceRootElementEvent(JAXBDocumentScanner.java:189)

Answer 1

try this:
try {
FileInputStream inputStream = new FileInputStream(new File("your file"));
AddRequest req = JAXB.unmarshal(inputStream, AddRequest.class);
} catch (FileNotFoundException e) {
e.printStackTrace();
}

Answer 2

In your use case you have define the root element information leveraging the #XmlElementDecl annotation on a ObjectFactory class annotated with #XmlRegistry (see: http://blog.bdoughan.com/2012/07/jaxb-and-root-elements.html). Since the class annotated with #XmlRegistry can be called anything and JAXB doesn't do package scanning you need to include your ObjectFactory as one of the classes passed in to bootstrap the JAXBContext.
JAXBContext.newInstance(AddRequest.class, ObjectFactory.class);
Since the ObjectFactory class references AddRequest you could simplify this down to:
JAXBContext.newInstance(ObjectFactory.class);