I have the following:

<xs:element name="MainImageSequence" type="cpl:SequenceType"/>
<xs:element name="MainAudioSequence" type="cpl:SequenceType"/>
<xs:element name="SubtitlesSequence" type="cpl:SequenceType"/>

The three different elements have the same type parameter, and XJC only generates one class for the base type.

I have some scenarios, where the three of them can coexist together in the XMLs, although all have the same fields, yet they have different meanings.

I want to differentiate between the objects that all of them would be of SequenceType type.

I have been thinking about using JXB bindings to bind each one of them to different custom class, yet I see it’s generated with no annotations.

<jaxb:bindings xmlns:xs="http://www.w3.org/2001/XMLSchema"  schemaLocation="./imp/xsds/cpl/imf-cpl-ST2067-2-2016.xsd" node="//xs:element[@name='MainImageSequence']">
    <jaxb:class name="MainImageSequence"/>
</jaxb:bindings>

public class MainImageSequence
    extends JAXBElement<SequenceType>
{

    protected static final QName NAME = new QName("http://www.smpte-ra.org/schemas/2067-2/2016", "MainImageSequence");

    public MainImageSequence(SequenceType value) {
        super(NAME, ((Class<SequenceType> ) SequenceType.class), null, value);
    }

    public MainImageSequence() {
        super(NAME, ((Class<SequenceType> ) SequenceType.class), null, null);
    }

}

The unmarshaller on my machine converts the XML of this element to ElementNSimpl.

Is there a way to make this binding work or another way to differentiate?

I needed to add the generated classes to the classToBound when creating a JAXBContext

JAXBContext context = JAXBContextFactory.createContext(new Class[] {MainImageSequence.class, MainAudioSequence.class}, properties);

I get a different error right now.

Caused by: java.lang.NullPointerException: Cannot load from object array because "factoryMethodParamTypes" is null
    at org.eclipse.persistence.jaxb.compiler.MappingsGenerator.generateDescriptorForJAXBElementSubclass(MappingsGenerator.java:555)
    at org.eclipse.persistence.jaxb.compiler.MappingsGenerator.generateDescriptor(MappingsGenerator.java:426)
    at org.eclipse.persistence.jaxb.compiler.MappingsGenerator.generateProject(MappingsGenerator.java:254)
    at org.eclipse.persistence.jaxb.compiler.Generator.generateProject(Generator.java:182)
    at org.eclipse.persistence.jaxb.JAXBContext$TypeMappingInfoInput.createContextState(JAXBContext.java:1178)
    at org.eclipse.persistence.jaxb.JAXBContext$TypeMappingInfoInput.createContextState(JAXBContext.java:1170)

I use MoXy version 4.0.4, I have been debugging the Moxy itself and it seems for me the ObjectFactory class and method are not registered for the custom generated classes.