Marshaling a long primitive type using JAXB

Question

To marshal a long primitive type using JAXB, I have used @XmlJavaTypeAdapter annotation, which will adapt non-String type to a String. Even though it throw erro

Answer 1

Just replace

 @XmlElement(type=Long.class)
private long id;

with

    @XmlSchemaType(name = "long")
protected Long id;

Answer 2

Specify the primitive class in the annotation:

@XmlJavaTypeAdapter(type=long.class, value=WSLongAdapter.class)

Answer 3

The following might work:

class User {
    @XmlID
    @XmlJavaTypeAdapter(WSLongAdapter.class)
    @XmlElement(type=Long.class)
    private long id;
    // Other variables
    // Getter & Setter method
}    

Answer 4

Create new getter annotated with @XmlID that returns String

@XmlAccessorType(XmlAccessType.FIELD)
class User {

    private long id;

    @XmlID
    public String getReferenceId() {
        return Long.toString(id);
    }

}

Only disadvantage of this solution is an additional tag is present in serialized XML (in this case <referenceId>). I tried to remove it by annotating that getter with @XmlTransient but then I got error informing that ID does not exists in referenced class.