/** @inheritDoc */
public <T> T find(final Class<T> theClass, final Object theObj) {
assertOpen();
try {
AnnotationChecker.assertValid(theClass);
} catch (EmpireException e) {
throw new IllegalArgumentException(e);
}
try {
if (DataSourceUtil.exists(getDataSource(), EmpireUtil.asPrimaryKey(theObj))) {
T aT = RdfGenerator.fromRdf(theClass, EmpireUtil.asPrimaryKey(theObj), getDataSource());
postLoad(aT);
return aT;
} else {
return null;
}
} catch (InvalidRdfException e) {
throw new IllegalArgumentException(
"Type is not valid, or object with key is not a valid Rdf Entity.", e);
} catch (DataSourceException e) {
throw new PersistenceException(e);
}
}
@Test
public void testEmpireUtil() throws Exception {
SupportsRdfId aId = new SupportsRdfIdImpl();
assertTrue(EmpireUtil.asResource(aId) == null);
Resource aRes =
EmpireUtil.asResource(new SupportsRdfIdImpl(new SupportsRdfId.BNodeKey("asdf")));
assertTrue(aRes instanceof BNode);
assertEquals(((BNode) aRes).getID(), "asdf");
aId = EmpireUtil.asSupportsRdfId(java.net.URI.create("urn:foo"));
assertTrue(aId.getRdfId() instanceof SupportsRdfId.URIKey);
assertEquals(aId.getRdfId().value(), java.net.URI.create("urn:foo"));
assertTrue(EmpireUtil.getNamedGraph("") == null);
SupportsRdfId.RdfKey aKey = EmpireUtil.asPrimaryKey(new URL("http://example.org"));
assertTrue(aKey instanceof SupportsRdfId.URIKey);
assertEquals(aKey.value(), new URL("http://example.org").toURI());
BNode aAnon = ValueFactoryImpl.getInstance().createBNode("foobar");
aKey = EmpireUtil.asPrimaryKey(aAnon);
assertTrue(aKey instanceof SupportsRdfId.BNodeKey);
assertEquals(aKey.value(), "foobar");
}
