private <T> T first(Iteration<T, ?> iter) throws Exception {
try {
if (iter.hasNext()) {
return iter.next();
}
} finally {
Iterations.closeCloseable(iter);
}
return null;
}
private int countElements(Iteration<?, ?> iter) throws Exception {
int count = 0;
try {
while (iter.hasNext()) {
iter.next();
count++;
}
} finally {
Iterations.closeCloseable(iter);
}
return count;
}