/**
* Write key-value pair at the head of this stream to the objects provided; get next key-value
* pair from proxied RR.
*/
public boolean next(K key, U value) throws IOException {
if (hasNext()) {
WritableUtils.cloneInto(key, khead);
WritableUtils.cloneInto(value, vhead);
next();
return true;
}
return false;
}
/** Clone the key at the head of this RR into the object supplied. */
public void key(K qkey) throws IOException {
WritableUtils.cloneInto(qkey, khead);
}