Jaxb should Marshalling internal Classes?

Look I have this piece of XSD:

<xs:complexType name="ResourcesType">
    <xs:sequence>
      <xs:element name="Classrooms">
        <xs:complexType mixed="true">
          <xs:sequence>
            <xs:element type="ResourceType" name="Resource" maxOccurs="unbounded" minOccurs="0"/>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="Teachers">
        <xs:complexType mixed="true">
          <xs:sequence>
            <xs:element type="ResourceType" name="Resource" maxOccurs="unbounded" minOccurs="0"/>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="Classes"&开发者_C百科gt;
        <xs:complexType mixed="true">
          <xs:sequence>
            <xs:element type="ResourceType" name="Resource" maxOccurs="unbounded" minOccurs="0"/>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="Special">
        <xs:simpleType>
          <xs:restriction base="xs:string">
            <xs:enumeration value="0"/>
            <xs:enumeration value=""/>
          </xs:restriction>
        </xs:simpleType>
      </xs:element>
    </xs:sequence>
  </xs:complexType>

I generated the classes from the schema using the eclipse plugin and I got this:

ResourcesType class with Classes, ClassRooms and Teachers inner classes. In all this inner classes I have protected List<Serializable> content field. It generated also ClassesType, ClassRoomsType and TeachersType as normal classes.

Why was generated this inner classes ? How would I set this List if the other classes are not serializable ?

Thank you

Best regards

Why was generated this inner classes ?

A JAXB implementation will inner classes for anonymous complex types. This is done in order to reduce the possibilities of name conflicts of generated classes.

<xs:complexType name="ResourcesType">
    <xs:sequence>
      <xs:element name="Classrooms">
        <xs:complexType mixed="true">
          <xs:sequence>
            <xs:element type="ResourceType" name="Resource" maxOccurs="unbounded" minOccurs="0"/>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      ...
    </xs:sequence>

    </xs:complexType>

How would I set this List if the other classes are not serializable ?

The allowed contents of the content property are JAXBElement<ResourceType> and String. Serializable is a common interface to both these types that is a little more restrictive than Object.

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
    "content"
})
public static class Classes {

    @XmlElementRef(name = "Resource", type = JAXBElement.class)
    @XmlMixed
    protected List<Serializable> content;

    /**
     * Gets the value of the content property.
     * 
     * <p>
     * This accessor method returns a reference to the live list,
     * not a snapshot. Therefore any modification you make to the
     * returned list will be present inside the JAXB object.
     * This is why there is not a <CODE>set</CODE> method for the content property.
     * 
     * <p>
     * For example, to add a new item, do as follows:
     * <pre>
     *    getContent().add(newItem);
     * </pre>
     * 
     * 
     * <p>
     * Objects of the following type(s) are allowed in the list
     * {@link JAXBElement }{@code <}{@link ResourceType }{@code >}
     * {@link String }
     * 
     * 
     */
    public List<Serializable> getContent() {
        if (content == null) {
            content = new ArrayList<Serializable>();
        }
        return this.content;
    }

}

UPDATE

The following example may help:

package example;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.Marshaller;
import javax.xml.namespace.QName;

import example.ResourcesType.Classrooms;

public class Demo {

    public static void main(String[] args) throws Exception {
        // This is the ObjectFactory that was generated by XJC
        ObjectFactory objectFactory = new ObjectFactory();

        // You can instantiate objects using the constructors
        ResourcesType resourcesType = new ResourcesType();

        // You can instantiate objects using the ObjectFactory
        Classrooms classRooms = objectFactory.createResourcesTypeClassrooms();
        resourcesType.setClassrooms(classRooms);

        // You can use the ObjectFactory to wrap an object in a JAXBElement
        ResourceType resourceType1 = new ResourceType();
        JAXBElement<ResourceType> jaxbElement1 = objectFactory.createResourcesTypeClassesResource(resourceType1);
        classRooms.getContent().add(jaxbElement1);

        ResourceType resourceType2 = objectFactory.createResourceType();
        JAXBElement<ResourceType> jaxbElement2 = objectFactory.createResourcesTypeClassesResource(resourceType2);
        classRooms.getContent().add(jaxbElement2);

        // You can create a JAXBContext on the package name of your generated classes
        JAXBContext jc = JAXBContext.newInstance("example");

        Marshaller marshaller = jc.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

        // You can also create an instance of JAXBElement without using the ObjectFactory
        JAXBElement<ResourcesType> rootElement = new JAXBElement<ResourcesType>(new QName("root"), ResourcesType.class, resourcesType);
        marshaller.marshal(rootElement, System.out);
    }

}