EclipseLink/UserGuide/MOXy/Runtime/Bootstrapping

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EclipseLink MOXy

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Contents


Bootstrapping

EclipseLink MOXy offers several options when creating your JAXBContext. You have the option of bootstrapping from:

  • A list of one or more JAXB-annotated Classes
  • A list of one or more EclipseLink OXM Bindings Files defining the mappings for your Java classes
  • A combination of Classes and OXM files
  • A Session name, referring to an EclipseLink Session defined in sessions.xml


JAXBContext API

The following methods on JAXBContext are used to create new instances of JAXBContexts:

public static JAXBContext newInstance(Class... classesToBeBound) throws JAXBException
 
public static JAXBContext newInstance(Class[] classesToBeBound, Map<String,?> properties) throws JAXBException
 
public static JAXBContext newInstance(String contextPath) throws JAXBException
 
public static JAXBContext newInstance(String contextPath, ClassLoader classLoader) throws JAXBException
 
public static JAXBContext newInstance(String contextPath, ClassLoader classLoader, Map<String,?> properties) throws JAXBException
  • classesToBeBound - List of Java classes to be recognized by the new JAXBContext.
  • contextPath - List of Java package names that contain mapped classes.
  • classLoader - The class loader used to locate the mapped classes.
  • properties - A map of additional properties.


Bootstrapping from Classes

If you already have a collection of Java Classes annotated with JAXB annotations, you can provide an list of these Classes directly:

JAXBContext context = JAXBContext.newInstance(Company.class, Employee.class);


Bootstrapping from EclipseLink OXM

Links to the actual OXM files are passed in via the properties parameter, using a special key, JAXBContextFactory.ECLIPSELINK_OXM_XML_KEY. The value of this key will be a handle to the OXM metadata file, in the form of one of the following:

  • java.io.File
  • java.io.InputStream
  • java.io.Reader
  • java.net.URL
  • javax.xml.stream.XMLEventReader
  • javax.xml.stream.XMLStreamReader
  • javax.xml.transform.Source
  • org.w3c.dom.Node
  • org.xml.sax.InputSource

When bootstrapping from OXM, the package specified by contextPath must contain a jaxb.properties file that specifies the EclipseLink JAXBContextFactory.

InputStream iStream = myClassLoader.getResourceAsStream("example/eclipselink-oxm.xml");
 
Map<String, Object> properties = new HashMap<String, Object>();
properties.put(JAXBContextFactory.ECLIPSELINK_OXM_XML_KEY, iStream);
 
JAXBContext context = JAXBContext.newInstance("example", myClassLoader, properties);


Bootstrapping from Context Path

ObjectFactory

jaxb.index

sessions.xml