/**
* Creates new HashSet
*
* @param name of set to create
* @param keepCounter if counter should be kept, without counter updates are faster, but entire
* collection needs to be traversed to count items.
* @param serializer used to convert keys into/from binary form. Use null for default value.
* @param <K> item type
* @throws IllegalArgumentException if name is already used
*/
public synchronized <K> Set<K> createHashSet(
String name, boolean keepCounter, Serializer<K> serializer) {
checkNameNotExists(name);
Set<K> ret =
new HTreeMap<K, Object>(
engine,
catPut(name + ".counterRecid", !keepCounter ? 0L : engine.put(0L, Serializer.LONG)),
catPut(name + ".hashSalt", Utils.RANDOM.nextInt()),
catPut(name + ".segmentRecids", HTreeMap.preallocateSegments(engine)),
catPut(name + ".serializer", serializer, getDefaultSerializer()),
null,
0L,
0L,
0L,
0L,
null,
null,
null)
.keySet();
catalog.put(name + ".type", "HashSet");
collections.put(name, new WeakReference<Object>(ret));
return ret;
}
/**
* Creates new HashMap with more specific arguments
*
* @param <K> key type
* @param <V> value type
* @throws IllegalArgumentException if name is already used
* @return newly created map
*/
protected synchronized <K, V> HTreeMap<K, V> createHashMap(HTreeMapMaker m) {
String name = m.name;
checkNameNotExists(name);
long expireTimeStart = 0, expire = 0, expireAccess = 0, expireMaxSize = 0;
long[] expireHeads = null, expireTails = null;
if (m.expire != 0 || m.expireAccess != 0 || m.expireMaxSize != 0) {
expireTimeStart = catPut(name + ".expireTimeStart", System.currentTimeMillis());
expire = catPut(name + ".expire", m.expire);
expireAccess = catPut(name + ".expireAccess", m.expireAccess);
expireMaxSize = catPut(name + ".expireMaxSize", m.expireMaxSize);
expireHeads = new long[16];
expireTails = new long[16];
for (int i = 0; i < 16; i++) {
expireHeads[i] = engine.put(0L, Serializer.LONG);
expireTails[i] = engine.put(0L, Serializer.LONG);
}
catPut(name + ".expireHeads", expireHeads);
catPut(name + ".expireTails", expireHeads);
}
HTreeMap<K, V> ret =
new HTreeMap<K, V>(
engine,
catPut(name + ".counterRecid", !m.keepCounter ? 0L : engine.put(0L, Serializer.LONG)),
catPut(name + ".hashSalt", Utils.RANDOM.nextInt()),
catPut(name + ".segmentRecids", HTreeMap.preallocateSegments(engine)),
catPut(name + ".keySerializer", m.keySerializer, getDefaultSerializer()),
catPut(name + ".valueSerializer", m.valueSerializer, getDefaultSerializer()),
expireTimeStart,
expire,
expireAccess,
expireMaxSize,
expireHeads,
expireTails,
m.valueCreator);
catalog.put(name + ".type", "HashMap");
collections.put(name, new WeakReference<Object>(ret));
return ret;
}