public V remove(DirectBytes keyBytes, V value, int hash2) {
if (hash2 == hashLookup.unsetKey()) hash2 = ~hash2;
lock();
try {
hashLookup.startSearch(hash2);
while (true) {
int pos = hashLookup.nextInt();
if (pos == hashLookup.unsetValue()) {
return null;
} else {
long offset = entriesOffset + pos * builder.entrySize();
tmpBytes.storePositionAndSize(bytes, offset, builder.entrySize());
if (!keyEquals(keyBytes, tmpBytes)) continue;
long keyLength = align(keyBytes.remaining());
tmpBytes.skip(keyLength);
V v =
value == null && builder.removeReturnsNull()
? null
: readObjectUsing(value, offset + keyLength);
hashLookup.remove(hash2, pos);
freeList.clear(pos);
if (pos < nextSet) nextSet = pos;
return v;
}
}
} finally {
unlock();
}
}
public V acquire(DirectBytes keyBytes, V value, int hash2, boolean create) {
if (hash2 == hashLookup.unsetKey()) hash2 = ~hash2;
lock();
try {
hashLookup.startSearch(hash2);
while (true) {
int pos = hashLookup.nextInt();
if (pos == hashLookup.unsetValue()) {
return create ? acquireEntry(keyBytes, value, hash2) : null;
} else {
long offset = entriesOffset + pos * builder.entrySize();
tmpBytes.storePositionAndSize(bytes, offset, builder.entrySize());
long start0 = System.nanoTime();
boolean miss = !keyEquals(keyBytes, tmpBytes);
long time0 = System.nanoTime() - start0;
if (time0 > 1e6)
System.out.println("startsWith took " + time0 / 100000 / 10.0 + " ms.");
if (miss) continue;
long keyLength =
align(keyBytes.remaining() + tmpBytes.position()); // includes the stop bit length.
tmpBytes.position(keyLength);
return readObjectUsing(value, offset + keyLength);
}
}
} finally {
unlock();
}
}
public V put(DirectBytes keyBytes, V value, int hash2, boolean replaceIfPresent) {
if (hash2 == hashLookup.unsetKey()) hash2 = ~hash2;
lock();
try {
hashLookup.startSearch(hash2);
while (true) {
int pos = hashLookup.nextInt();
if (pos == hashLookup.unsetValue()) {
putEntry(keyBytes, value, hash2);
return null;
} else {
long offset = entriesOffset + pos * builder.entrySize();
tmpBytes.storePositionAndSize(bytes, offset, builder.entrySize());
if (!keyEquals(keyBytes, tmpBytes)) continue;
long keyLength = keyBytes.remaining();
tmpBytes.skip(keyLength);
long alignPosition = align(tmpBytes.position());
tmpBytes.position(alignPosition);
if (replaceIfPresent) {
if (builder.putReturnsNull()) {
appendInstance(keyBytes, value);
return null;
}
V v = readObjectUsing(null, offset + alignPosition);
tmpBytes.position(alignPosition);
appendInstance(keyBytes, value);
return v;
} else {
if (builder.putReturnsNull()) {
return null;
}
return readObjectUsing(null, offset + keyLength);
}
}
}
} finally {
unlock();
}
}
private void putEntry(DirectBytes keyBytes, V value, int hash2) {
int pos = nextFree();
long offset = entriesOffset + pos * builder.entrySize();
tmpBytes.storePositionAndSize(bytes, offset, builder.entrySize());
long keyLength = keyBytes.remaining();
tmpBytes.writeStopBit(keyLength);
tmpBytes.write(keyBytes);
tmpBytes.position(align(tmpBytes.position()));
appendInstance(keyBytes, value);
// add to index if successful.
hashLookup.put(hash2, pos);
}
private V acquireEntry(DirectBytes keyBytes, V value, int hash2) {
int pos = nextFree();
long offset = entriesOffset + pos * builder.entrySize();
tmpBytes.storePositionAndSize(bytes, offset, builder.entrySize());
long keyLength = keyBytes.remaining();
tmpBytes.writeStopBit(keyLength);
tmpBytes.write(keyBytes);
tmpBytes.position(align(tmpBytes.position()));
tmpBytes.zeroOut(tmpBytes.position(), tmpBytes.limit());
V v = readObjectUsing(value, offset + tmpBytes.position());
// add to index if successful.
hashLookup.put(hash2, pos);
return v;
}
