public static Collection<IMedia> findReferencedMedia()
throws MapperException, XPathExpressionException, SQLException {
Set<IMedia> referenced = new HashSet<IMedia>();
// // TODO: obviously maintaining this list is not the way to go
// // I would like to have it so the structure clearly differentiates between an ID declaration
// and
// // a reference to an object's id
// // something along the lines of <Snu><mainMedia><refId>1</refId></mainMedia></Snu>
for (String ELEMENT : MapperHelper.REFERENCING_ELEMENTS) {
NodeList elements = DataRegistry.getDocument().getElementsByTagName(ELEMENT);
int length = elements.getLength();
for (int i = 0; i < length; ++i) {
Element element = (Element) elements.item(i);
long refId = Long.parseLong(element.getTextContent());
try {
IResource resource = ResourceInputMapper.map(refId);
if (resource instanceof IMedia) referenced.add((IMedia) resource);
} catch (DomainObjectNotFoundException e) {
e = null;
}
}
}
return referenced;
}
public static <M extends IMedia> M map(long id, Class<M> clazz) throws MapperException {
IResource resource = ResourceInputMapper.map(id);
if (!clazz.isAssignableFrom(resource.getClass()))
throw new MapperException(
"expected: "
+ clazz.getCanonicalName()
+ " but found: "
+ resource.getClass().getCanonicalName());
return clazz.cast(resource);
}
public static IMedia map(long id) throws MapperException {
IResource resource = ResourceInputMapper.map(id);
return (IMedia) resource;
}