Java – JAXB unmarshalling error: expected element is < {} root >

I'm reusing existing objects generated elsewhere to ungroup XML data in the form of string types

Object:

/*  3:   */ import java.util.ArrayList;
/*  4:   */ import java.util.List;
/*  5:   */ import javax.xml.bind.annotation.XmlAccessType;
/*  6:   */ import javax.xml.bind.annotation.XmlAccessorType;
/*  7:   */ import javax.xml.bind.annotation.XmlElement;
/*  8:   */ import javax.xml.bind.annotation.XmlRootElement;
/*  9:   */ import javax.xml.bind.annotation.XmlType;
/* 10:   */ 
/* 11:   */ @XmlAccessorType(XmlAccessType.FIELD)
/* 12:   */ @XmlType(name="",propOrder={"policy"})
/* 13:   */ @XmlRootElement(name="MyNodeResponse")
/* 14:   */ public class MyNodeResponse
/* 15:   */ {
/* 16:   */   @XmlElement(name="Policy")
/* 17:   */   protected List<Policy> policy;
/* 18:   */   
/* 19:   */   public List<Policy> getPolicy()
/* 20:   */   {
/* 21:65 */     if (this.policy == null) {
/* 22:66 */       this.policy = new ArrayList();
/* 23:   */     }
/* 24:68 */     return this.policy;
/* 25:   */   }
/* 26:   */ }

My unmarshalling Code:

JAXBContext jc = JAXBContext.newInstance(MyNodeResponse.class); 
Unmarshaller unmarshaller = jc.createUnmarshaller();
MyNodeResponse myNodeResponse = (MyNodeResponse)unmarshaller.unmarshal(new InputSource(new ByteArrayInputStream(xmlStringInput.getBytes("utf-8"))));

My input XML:

<ns2:MyNodeResponse 
         xmlns:ns2="mynamespace/2010/10">   
   <ns2:Policy>
   ....more data....
   <ns2:Policy/>
<ns2:MyNodeResponse />

I received the following error when ungrouping:

unexpected element (uri:"mynamespace/2010/10",local:"MyNodeResponse"). Expected elements are <{}MyNodeResponse>

What exactly does "{}" refer to in the error and how to ungroup in a way that matches what exists in the input XML and what the object expects?

Solution

What does the error message say

In {} mynoderespons, the {} section references a qualified name that does not set the namespace URI section

How to solve it

You need to use the package level @ XMLSchema annotation to map namespace qualifications:

package-info. java

@XmlSchema(
    namespace = "mynamespace/2010/10",elementFormDefault = XmlNsForm.QUALIFIED)
package example;

import javax.xml.bind.annotation.XmlNsForm;
import javax.xml.bind.annotation.XmlSchema;

For more information

> http://blog.bdoughan.com/2010/08/jaxb-namespaces.html