}
// Create a JAX-B context, and use this to generate us a bunch of
// schema objects
JAXBIntrospector introspector = null;
try {
JAXBContext context = JAXBContext.newInstance(classSet.toArray(new Class[classSet.size()]));
final List<StreamResult> results = new ArrayList<StreamResult>();
context.generateSchema(new SchemaOutputResolver() {
int counter = 0;
@Override
public Result createOutput(String namespaceUri, String suggestedFileName) {
StreamResult result = new StreamResult(new CharArrayWriter());
result.setSystemId("xsd" + (counter++) + ".xsd");
results.add(result);
return result;
}
});
// Store the new files for later use
//
for (StreamResult result : results) {
CharArrayWriter writer = (CharArrayWriter) result.getWriter();
byte[] contents = writer.toString().getBytes("UTF8");
extraFiles.put(
result.getSystemId(),
new ApplicationDescription.ExternalGrammar(
MediaType.APPLICATION_XML_TYPE, // I don't think there is a specific media type for XML Schema
contents));
}
// Create an introspector
//
introspector = context.createJAXBIntrospector();
} catch (JAXBException e) {
LOGGER.log(Level.SEVERE, "Failed to generate the schema for the JAX-B elements", e);
} catch (IOException e) {
LOGGER.log(Level.SEVERE, "Failed to generate the schema for the JAX-B elements due to an IO error", e);
}
// Create introspector
if (introspector != null) {
final JAXBIntrospector copy = introspector;
return new Resolver() {
public QName resolve(Class type) {
Object parameterClassInstance = null;
try {
Constructor<?> defaultConstructor = type.getDeclaredConstructor();
defaultConstructor.setAccessible(true);
parameterClassInstance = defaultConstructor.newInstance();
} catch (InstantiationException ex) {
LOGGER.log(Level.FINE, null, ex);
} catch (IllegalAccessException ex) {
LOGGER.log(Level.FINE, null, ex);
} catch (IllegalArgumentException ex) {
LOGGER.log(Level.FINE, null, ex);
} catch (InvocationTargetException ex) {
LOGGER.log(Level.FINE, null, ex);
} catch (SecurityException ex) {
LOGGER.log(Level.FINE, null, ex);
} catch (NoSuchMethodException ex) {
LOGGER.log(Level.FINE, null, ex);
}
if (parameterClassInstance == null) {
return null;
}
try {
return copy.getElementName(parameterClassInstance);
} catch (NullPointerException e) {
// EclipseLink throws an NPE if an object annotated with @XmlType and without the @XmlRootElement
// annotation is passed as a parameter of #getElementName method.
return null;
}