| prev | table of contents | next |
XmlRegistry, XmlElementDecl
To be able to create objects from XML elements, the unmarshaller must
have an object factory with methods for creating all sorts of objects.
Therefore, each package containing JAXB classes must contain one class
ObjectFactory, annotated with XmlRegistry.
@XmlRegistry
public class ObjectFactory {
...
}
Most objects require nothing but a simple create method. But whenever
an element has to be represented as a JAXBElement<?>,
an additional factory method for wrapping the "pure" Java object of
some class Foo into an element of class
JAXBElement<Foo> must be provided. This method is
then annotated with XmlElementDecl, providing the
components of the element's tag name through the attributes
namespace and name. This is a snippet
from some object factory where an element of TreeType
is wrapped into a JAXBElement<TreeType>:
@XmlElementDecl(namespace = "", name = "tree")
public JAXBElement<TreeType> createTree( TreeType value) {
return new JAXBElement<TreeType>(_Tree_QNAME, TreeType.class, null, value);
}
| prev | table of contents | next |