Description Matt MacIvor 2011-08-19 15:23:18 EDT

Given the following Employee class:
@XmlType(name="employee", namespace="someuri")
public class Employee {

    public String name;
    
    public String id;
    
    public boolean equals(Object obj) {
        return name.equals(((Employee)obj).name) && id.equals(((Employee)obj).id);
    }
}

Create a context using TypeMappingInfos, with one based on Object (for Polymorphism)

        TypeMappingInfo[] typeMappingInfos = new TypeMappingInfo[2];
        
        TypeMappingInfo tpi = new TypeMappingInfo();
        tpi.setXmlTagName(new QName("someuri","response"));       
        tpi.setElementScope(ElementScope.Global);
        tpi.setType(Object.class);
        typeMappingInfos[0] = tpi;        
        
        TypeMappingInfo tmi = new TypeMappingInfo();
        tmi.setType(Employee.class);
        tmi.setXmlTagName(new QName("someuri", "employee"));
        tmi.setElementScope(ElementScope.Global);
        typeMappingInfos[1] = tmi;
        
        JAXBContext ctx = JAXBContextFactory.createContext(typeMappingInfos, null, Thread.currentThread().getContextClassLoader());

Create the following JAXBElement, and marshal using the TypeMappingInfo wrapping Object. (The marshal will work fine without the TMI or with the one for Employee, but should also work for the one wrapping object)

        Employee emp = new Employee();
        emp.id = "123";
        emp.name="aaa";
        JAXBElement<Object> elem = new JAXBElement<Object>(new QName("someuri", "response"), Object.class, emp);
        ((JAXBMarshaller)ctx.createMarshaller()).marshal(elem, new StreamResult(System.out), tpi);

Observe the output XML:

<ns1:response xmlns:ns1="someuri" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="ns0:employee">
   <name>aaa</name>
   <id>123</id>
</ns1:response>

The xsi:type references "ns0:employee", but ns0 is never declared.