static <K, V> RegularImmutableBiMap<K, V> fromEntryArray(int n, Entry<K, V>[] entryArray) {
checkPositionIndex(n, entryArray.length);
int tableSize = Hashing.closedTableSize(n, MAX_LOAD_FACTOR);
int mask = tableSize - 1;
ImmutableMapEntry<K, V>[] keyTable = createEntryArray(tableSize);
ImmutableMapEntry<K, V>[] valueTable = createEntryArray(tableSize);
Entry<K, V>[] entries;
if (n == entryArray.length) {
entries = entryArray;
} else {
entries = createEntryArray(n);
}
int hashCode = 0;
for (int i = 0; i < n; i++) {
@SuppressWarnings("unchecked")
Entry<K, V> entry = entryArray[i];
K key = entry.getKey();
V value = entry.getValue();
checkEntryNotNull(key, value);
int keyHash = key.hashCode();
int valueHash = value.hashCode();
int keyBucket = Hashing.smear(keyHash) & mask;
int valueBucket = Hashing.smear(valueHash) & mask;
ImmutableMapEntry<K, V> nextInKeyBucket = keyTable[keyBucket];
checkNoConflictInKeyBucket(key, entry, nextInKeyBucket);
ImmutableMapEntry<K, V> nextInValueBucket = valueTable[valueBucket];
checkNoConflictInValueBucket(value, entry, nextInValueBucket);
ImmutableMapEntry<K, V> newEntry;
if (nextInValueBucket == null && nextInKeyBucket == null) {
/*
* TODO(user): consider using a NonTerminalImmutableMapEntry when nextInKeyBucket is
* nonnull but nextInValueBucket is null. This may save a few bytes on some platforms, but
* 2-morphic call sites are often optimized much better than 3-morphic, so it'd require
* benchmarking.
*/
boolean reusable =
entry instanceof ImmutableMapEntry && ((ImmutableMapEntry<K, V>) entry).isReusable();
newEntry =
reusable ? (ImmutableMapEntry<K, V>) entry : new ImmutableMapEntry<K, V>(key, value);
} else {
newEntry =
new NonTerminalImmutableBiMapEntry<K, V>(
key, value, nextInKeyBucket, nextInValueBucket);
}
keyTable[keyBucket] = newEntry;
valueTable[valueBucket] = newEntry;
entries[i] = newEntry;
hashCode += keyHash ^ valueHash;
}
return new RegularImmutableBiMap<K, V>(keyTable, valueTable, entries, mask, hashCode);
}
RegularImmutableBiMap(Map.Entry<?, ?>[] entriesToAdd) {
int n = entriesToAdd.length;
int tableSize = Hashing.closedTableSize(n, 1.2D);
this.mask = (tableSize - 1);
ImmutableMapEntry<K, V>[] keyTable = createEntryArray(tableSize);
ImmutableMapEntry<K, V>[] valueTable = createEntryArray(tableSize);
ImmutableMapEntry<K, V>[] entries = createEntryArray(n);
int hashCode = 0;
for (int i = 0; i < n; i++) {
Map.Entry<K, V> entry = entriesToAdd[i];
K key = entry.getKey();
V value = entry.getValue();
CollectPreconditions.checkEntryNotNull(key, value);
int keyHash = key.hashCode();
int valueHash = value.hashCode();
int keyBucket = Hashing.smear(keyHash) & this.mask;
int valueBucket = Hashing.smear(valueHash) & this.mask;
ImmutableMapEntry<K, V> nextInKeyBucket = keyTable[keyBucket];
for (ImmutableMapEntry<K, V> keyEntry = nextInKeyBucket;
keyEntry != null;
keyEntry = keyEntry.getNextInKeyBucket()) {
checkNoConflict(!key.equals(keyEntry.getKey()), "key", entry, keyEntry);
}
ImmutableMapEntry<K, V> nextInValueBucket = valueTable[valueBucket];
for (ImmutableMapEntry<K, V> valueEntry = nextInValueBucket;
valueEntry != null;
valueEntry = valueEntry.getNextInValueBucket()) {
checkNoConflict(!value.equals(valueEntry.getValue()), "value", entry, valueEntry);
}
ImmutableMapEntry<K, V> newEntry =
(nextInKeyBucket == null) && (nextInValueBucket == null)
? new ImmutableMapEntry.TerminalEntry(key, value)
: new NonTerminalBiMapEntry(key, value, nextInKeyBucket, nextInValueBucket);
keyTable[keyBucket] = newEntry;
valueTable[valueBucket] = newEntry;
entries[i] = newEntry;
hashCode += (keyHash ^ valueHash);
}
this.keyTable = keyTable;
this.valueTable = valueTable;
this.entries = entries;
this.hashCode = hashCode;
}
public K get(@Nullable Object value) {
if (value == null) {
return null;
}
int bucket = Hashing.smear(value.hashCode()) & RegularImmutableBiMap.this.mask;
for (ImmutableMapEntry<K, V> entry = RegularImmutableBiMap.this.valueTable[bucket];
entry != null;
entry = entry.getNextInValueBucket()) {
if (value.equals(entry.getValue())) {
return (K) entry.getKey();
}
}
return null;
}
@Nullable
public V get(@Nullable Object key) {
if (key == null) {
return null;
}
int bucket = Hashing.smear(key.hashCode()) & this.mask;
for (ImmutableMapEntry<K, V> entry = this.keyTable[bucket];
entry != null;
entry = entry.getNextInKeyBucket()) {
if (key.equals(entry.getKey())) {
return (V) entry.getValue();
}
}
return null;
}
@Override
public boolean contains(Object target) {
if (target == null) {
return false;
}
for (int i = Hashing.smear(target.hashCode()); true; i++) {
Object candidate = table[i & mask];
if (candidate == null) {
return false;
}
if (candidate.equals(target)) {
return true;
}
}
}
@Override
public K get(@Nullable Object value) {
if (value == null || valueTable == null) {
return null;
}
int bucket = Hashing.smear(value.hashCode()) & mask;
for (ImmutableMapEntry<K, V> entry = valueTable[bucket];
entry != null;
entry = entry.getNextInValueBucket()) {
if (value.equals(entry.getValue())) {
return entry.getKey();
}
}
return null;
}
private static int hash(@Nullable Object paramObject)
{
if (paramObject == null);
for (int i = 0; ; i = paramObject.hashCode())
return Hashing.smear(i);
}