Jaxb Unmarshalling (different wrapper elements with same element) - jaxb

Question

I have below xml structure:
<Response>
<Field1>
<User>
<Name>abc</Name>
<Id>1</Id>
</User>
</Field1>
<Field2>
<User>
<Name>sdf</Name>
<Id>2</Id>
</User>
</Field2>
<Field3>
<User>
<Name>xyz</Name>
<Id>3</Id>
</User>
</Field3>
...
</Response>
There are different Field(X) wrapper elements which contain the same User element. There can be n number of Fields sent in the XML. Due to this I cannot have the separate Jaxb's for each. I need to get access to the User ignoring the Field elements after the unmarshalling step. Unfortunately I dont have access to change the xml structure. I am unable to find a solution for it. Any pointers will be helpful.

Answer 1

You can do something like this on you Response (root) class:
#XmlRootElement(name = "Response")
#Data
#XmlAccessorType(XmlAccessType.FIELD)
public class Root {
#XmlElements(value = {
#XmlElement(name = "Field1", type = Field.class),
#XmlElement(name = "Field2", type = Field.class),
#XmlElement(name = "Field3", type = Field.class)
})
private Field field;
}
JAXB would automatically map to field class whenever it encounters the different FIelds.
EDITED/UPDATED
XML:
<Response>
<Field1>
<Name>abc</Name>
<Id>1</Id>
</Field1>
<Field2>
<Name>sdf</Name>
<Id>2</Id>
</Field2>
<Field3>
<Name>xyz</Name>
<Id>3</Id>
</Field3>
</Response>
Root:
#XmlRootElement(name = "Response")
#Data
#XmlAccessorType(XmlAccessType.FIELD)
public class Root {
#XmlAnyElement
private List<Field> action;
}
Field:
#Data
#XmlAccessorType(XmlAccessType.FIELD)
public class Field {
private String Name;
private String Id;
}
Main:
public class Main {
public static void main(String[] args) throws JAXBException, XMLStreamException {
final InputStream inputStream = Main.class.getClassLoader().getResourceAsStream("sample.xml");
final XMLStreamReader xmlStreamReader = XMLInputFactory.newInstance().createXMLStreamReader(inputStream);
final Unmarshaller unmarshaller = JAXBContext.newInstance(Root.class).createUnmarshaller();
final Root root = unmarshaller.unmarshal(xmlStreamReader, Root.class).getValue();
System.out.println(root.toString());
Marshaller marshaller = JAXBContext.newInstance(Root.class).createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE);
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
marshaller.marshal(root, System.out);
}
}
Output:
Root(action=[[Field1: null], [Field2: null], [Field3: null]])
<Response>
<Field1>
<Name>abc</Name>
<Id>1</Id>
</Field1>
<Field2>
<Name>sdf</Name>
<Id>2</Id>
</Field2>
<Field3>
<Name>xyz</Name>
<Id>3</Id>
</Field3>
</Response>