@Override
public synchronized void append(WritableComparable key, Writable val) throws IOException {
super.append(key, val);
buf.reset();
key.write(buf);
bloomKey.set(byteArrayForBloomKey(buf), 1.0);
bloomFilter.add(bloomKey);
}
/**
* Checks if this MapFile has the indicated key. The membership test is performed using a Bloom
* filter, so the result has always non-zero probability of false positives.
*
* @param key key to check
* @return false iff key doesn't exist, true if key probably exists.
* @throws IOException
*/
public boolean probablyHasKey(WritableComparable key) throws IOException {
if (bloomFilter == null) {
return true;
}
buf.reset();
key.write(buf);
bloomKey.set(byteArrayForBloomKey(buf), 1.0);
return bloomFilter.membershipTest(bloomKey);
}