com.carrotsearch.hppc.LongIntHashMap Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of hppc Show documentation
Show all versions of hppc Show documentation
High Performance Primitive Collections: data structures (maps, sets, lists, stacks, queues) generated for combinations of object and primitive types to conserve JVM memory and speed up execution.
package com.carrotsearch.hppc;
import java.util.*;
import com.carrotsearch.hppc.cursors.*;
import com.carrotsearch.hppc.predicates.*;
import com.carrotsearch.hppc.procedures.*;
import static com.carrotsearch.hppc.HashContainers.*;
import static com.carrotsearch.hppc.Containers.*;
/**
* A hash map of long to int, implemented using open
* addressing with linear probing for collision resolution.
*
* Note: read about important differences
* between hash and scatter sets.
*
* @see LongIntScatterMap
* @see HPPC interfaces diagram
*/
@com.carrotsearch.hppc.Generated(
date = "2018-05-21T12:24:06+0200",
value = "KTypeVTypeHashMap.java")
public class LongIntHashMap
implements
LongIntMap,
Preallocable,
Cloneable
{
/**
* The array holding keys.
*/
public long []
keys;
/**
* The array holding values.
*/
public int []
values;
/**
* We perturb hash values with a container-unique
* seed to avoid problems with nearly-sorted-by-hash
* values on iterations.
*
* @see #hashKey
* @see "http://issues.carrot2.org/browse/HPPC-80"
* @see "http://issues.carrot2.org/browse/HPPC-103"
*/
protected int keyMixer;
/**
* The number of stored keys (assigned key slots), excluding the special
* "empty" key, if any (use {@link #size()} instead).
*
* @see #size()
*/
protected int assigned;
/**
* Mask for slot scans in {@link #keys}.
*/
protected int mask;
/**
* Expand (rehash) {@link #keys} when {@link #assigned} hits this value.
*/
protected int resizeAt;
/**
* Special treatment for the "empty slot" key marker.
*/
protected boolean hasEmptyKey;
/**
* The load factor for {@link #keys}.
*/
protected double loadFactor;
/**
* Per-instance hash order mixing strategy.
* @see #keyMixer
*/
protected HashOrderMixingStrategy orderMixer;
/**
* New instance with sane defaults.
*/
public LongIntHashMap() {
this(DEFAULT_EXPECTED_ELEMENTS);
}
/**
* New instance with sane defaults.
*
* @param expectedElements
* The expected number of elements guaranteed not to cause buffer
* expansion (inclusive).
*/
public LongIntHashMap(int expectedElements) {
this(expectedElements, DEFAULT_LOAD_FACTOR);
}
/**
* New instance with sane defaults.
*
* @param expectedElements
* The expected number of elements guaranteed not to cause buffer
* expansion (inclusive).
* @param loadFactor
* The load factor for internal buffers. Insane load factors (zero, full capacity)
* are rejected by {@link #verifyLoadFactor(double)}.
*/
public LongIntHashMap(int expectedElements, double loadFactor) {
this(expectedElements, loadFactor, HashOrderMixing.defaultStrategy());
}
/**
* New instance with the provided defaults.
*
* @param expectedElements
* The expected number of elements guaranteed not to cause a rehash (inclusive).
* @param loadFactor
* The load factor for internal buffers. Insane load factors (zero, full capacity)
* are rejected by {@link #verifyLoadFactor(double)}.
* @param orderMixer
* Hash key order mixing strategy. See {@link HashOrderMixing} for predefined
* implementations. Use constant mixers only if you understand the potential
* consequences.
*/
public LongIntHashMap(int expectedElements, double loadFactor, HashOrderMixingStrategy orderMixer) {
this.orderMixer = orderMixer;
this.loadFactor = verifyLoadFactor(loadFactor);
ensureCapacity(expectedElements);
}
/**
* Create a hash map from all key-value pairs of another container.
*/
public LongIntHashMap(LongIntAssociativeContainer container) {
this(container.size());
putAll(container);
}
/**
* {@inheritDoc}
*/
@Override
public int put(long key, int value) {
assert assigned < mask + 1;
final int mask = this.mask;
if (((key) == 0)) {
hasEmptyKey = true;
int previousValue = values[mask + 1];
values[mask + 1] = value;
return previousValue;
} else {
final long[] keys = this.keys;
int slot = hashKey(key) & mask;
long existing;
while (!((existing = keys[slot]) == 0)) {
if (((existing) == ( key))) {
final int previousValue = values[slot];
values[slot] = value;
return previousValue;
}
slot = (slot + 1) & mask;
}
if (assigned == resizeAt) {
allocateThenInsertThenRehash(slot, key, value);
} else {
keys[slot] = key;
values[slot] = value;
}
assigned++;
return 0;
}
}
/**
* {@inheritDoc}
*/
@Override
public int putAll(LongIntAssociativeContainer container) {
final int count = size();
for (LongIntCursor c : container) {
put(c.key, c.value);
}
return size() - count;
}
/**
* Puts all key/value pairs from a given iterable into this map.
*/
@Override
public int putAll(Iterable iterable){
final int count = size();
for (LongIntCursor c : iterable) {
put(c.key, c.value);
}
return size() - count;
}
/**
* Trove-inspired API method. An equivalent
* of the following code:
*
* if (!map.containsKey(key)) map.put(value);
*
*
* @param key The key of the value to check.
* @param value The value to put if key does not exist.
* @return true if key did not exist and value
* was placed in the map.
*/
public boolean putIfAbsent(long key, int value) {
int keyIndex = indexOf(key);
if (!indexExists(keyIndex)) {
indexInsert(keyIndex, key, value);
return true;
} else {
return false;
}
}
/**
* If key exists, putValue is inserted into the map,
* otherwise any existing value is incremented by additionValue.
*
* @param key
* The key of the value to adjust.
* @param putValue
* The value to put if key does not exist.
* @param incrementValue
* The value to add to the existing value if key exists.
* @return Returns the current value associated with key (after
* changes).
*/
@Override
public int putOrAdd(long key, int putValue, int incrementValue) {
assert assigned < mask + 1;
int keyIndex = indexOf(key);
if (indexExists(keyIndex)) {
putValue = ((int) (( values[keyIndex]) + (incrementValue)));
indexReplace(keyIndex, putValue);
} else {
indexInsert(keyIndex, key, putValue);
}
return putValue;
}
/**
* Adds incrementValue to any existing value for the given key
* or inserts incrementValue if key did not previously exist.
*
* @param key The key of the value to adjust.
* @param incrementValue The value to put or add to the existing value if key exists.
* @return Returns the current value associated with key (after changes).
*/
@Override
public int addTo(long key, int incrementValue)
{
return putOrAdd(key, incrementValue, incrementValue);
}
/**
* {@inheritDoc}
*/
@Override
public int remove(long key) {
final int mask = this.mask;
if (((key) == 0)) {
hasEmptyKey = false;
int previousValue = values[mask + 1];
values[mask + 1] = 0;
return previousValue;
} else {
final long[] keys = this.keys;
int slot = hashKey(key) & mask;
long existing;
while (!((existing = keys[slot]) == 0)) {
if (((existing) == ( key))) {
final int previousValue = values[slot];
shiftConflictingKeys(slot);
return previousValue;
}
slot = (slot + 1) & mask;
}
return 0;
}
}
/**
* {@inheritDoc}
*/
@Override
public int removeAll(LongContainer other) {
final int before = size();
// Try to iterate over the smaller set of values or
// over the container that isn't implementing
// efficient contains() lookup.
if (other.size() >= size() &&
other instanceof LongLookupContainer) {
if (hasEmptyKey) {
if (other.contains(0L)) {
hasEmptyKey = false;
values[mask + 1] = 0;
}
}
final long[] keys = this.keys;
for (int slot = 0, max = this.mask; slot <= max;) {
long existing;
if (!((existing = keys[slot]) == 0) && other.contains(existing)) {
// Shift, do not increment slot.
shiftConflictingKeys(slot);
} else {
slot++;
}
}
} else {
for (LongCursor c : other) {
this.remove( c.value);
}
}
return before - size();
}
/**
* {@inheritDoc}
*/
@Override
public int removeAll(LongIntPredicate predicate) {
final int before = size();
final int mask = this.mask;
if (hasEmptyKey) {
if (predicate.apply(0L, values[mask + 1])) {
hasEmptyKey = false;
values[mask + 1] = 0;
}
}
final long[] keys = this.keys;
final int[] values = this.values;
for (int slot = 0; slot <= mask;) {
long existing;
if (!((existing = keys[slot]) == 0) &&
predicate.apply(existing, values[slot])) {
// Shift, do not increment slot.
shiftConflictingKeys(slot);
} else {
slot++;
}
}
return before - size();
}
/**
* {@inheritDoc}
*/
@Override
public int removeAll(LongPredicate predicate) {
final int before = size();
if (hasEmptyKey) {
if (predicate.apply(0L)) {
hasEmptyKey = false;
values[mask + 1] = 0;
}
}
final long[] keys = this.keys;
for (int slot = 0, max = this.mask; slot <= max;) {
long existing;
if (!((existing = keys[slot]) == 0) &&
predicate.apply(existing)) {
// Shift, do not increment slot.
shiftConflictingKeys(slot);
} else {
slot++;
}
}
return before - size();
}
/**
* {@inheritDoc}
*/
@Override
public int get(long key) {
if (((key) == 0)) {
return hasEmptyKey ? values[mask + 1] : 0;
} else {
final long[] keys = this.keys;
final int mask = this.mask;
int slot = hashKey(key) & mask;
long existing;
while (!((existing = keys[slot]) == 0)) {
if (((existing) == ( key))) {
return values[slot];
}
slot = (slot + 1) & mask;
}
return 0;
}
}
/**
* {@inheritDoc}
*/
@Override
public int getOrDefault(long key, int defaultValue) {
if (((key) == 0)) {
return hasEmptyKey ? values[mask + 1] : defaultValue;
} else {
final long[] keys = this.keys;
final int mask = this.mask;
int slot = hashKey(key) & mask;
long existing;
while (!((existing = keys[slot]) == 0)) {
if (((existing) == ( key))) {
return values[slot];
}
slot = (slot + 1) & mask;
}
return defaultValue;
}
}
/**
* {@inheritDoc}
*/
@Override
public boolean containsKey(long key) {
if (((key) == 0)) {
return hasEmptyKey;
} else {
final long[] keys = this.keys;
final int mask = this.mask;
int slot = hashKey(key) & mask;
long existing;
while (!((existing = keys[slot]) == 0)) {
if (((existing) == ( key))) {
return true;
}
slot = (slot + 1) & mask;
}
return false;
}
}
/**
* {@inheritDoc}
*/
@Override
public int indexOf(long key) {
final int mask = this.mask;
if (((key) == 0)) {
return hasEmptyKey ? mask + 1 : ~(mask + 1);
} else {
final long[] keys = this.keys;
int slot = hashKey(key) & mask;
long existing;
while (!((existing = keys[slot]) == 0)) {
if (((existing) == ( key))) {
return slot;
}
slot = (slot + 1) & mask;
}
return ~slot;
}
}
/**
* {@inheritDoc}
*/
@Override
public boolean indexExists(int index) {
assert index < 0 ||
(index >= 0 && index <= mask) ||
(index == mask + 1 && hasEmptyKey);
return index >= 0;
}
/**
* {@inheritDoc}
*/
@Override
public int indexGet(int index) {
assert index >= 0 : "The index must point at an existing key.";
assert index <= mask ||
(index == mask + 1 && hasEmptyKey);
return values[index];
}
/**
* {@inheritDoc}
*/
@Override
public int indexReplace(int index, int newValue) {
assert index >= 0 : "The index must point at an existing key.";
assert index <= mask ||
(index == mask + 1 && hasEmptyKey);
int previousValue = values[index];
values[index] = newValue;
return previousValue;
}
/**
* {@inheritDoc}
*/
@Override
public void indexInsert(int index, long key, int value) {
assert index < 0 : "The index must not point at an existing key.";
index = ~index;
if (((key) == 0)) {
assert index == mask + 1;
values[index] = value;
hasEmptyKey = true;
} else {
assert ((keys[index]) == 0);
if (assigned == resizeAt) {
allocateThenInsertThenRehash(index, key, value);
} else {
keys[index] = key;
values[index] = value;
}
assigned++;
}
}
/**
* {@inheritDoc}
*/
@Override
public void clear() {
assigned = 0;
hasEmptyKey = false;
Arrays.fill(keys, 0L);
/* */
}
/**
* {@inheritDoc}
*/
@Override
public void release() {
assigned = 0;
hasEmptyKey = false;
keys = null;
values = null;
ensureCapacity(Containers.DEFAULT_EXPECTED_ELEMENTS);
}
/**
* {@inheritDoc}
*/
@Override
public int size() {
return assigned + (hasEmptyKey ? 1 : 0);
}
/**
* {@inheritDoc}
*/
public boolean isEmpty() {
return size() == 0;
}
/**
* {@inheritDoc}
*/
@Override
public int hashCode() {
int h = hasEmptyKey ? 0xDEADBEEF : 0;
for (LongIntCursor c : this) {
h += BitMixer.mix(c.key) +
BitMixer.mix(c.value);
}
return h;
}
/**
* {@inheritDoc}
*/
@Override
public boolean equals(Object obj) {
return obj != null &&
getClass() == obj.getClass() &&
equalElements(getClass().cast(obj));
}
/**
* Return true if all keys of some other container exist in this container.
*/
protected boolean equalElements(LongIntHashMap other) {
if (other.size() != size()) {
return false;
}
for (LongIntCursor c : other) {
long key = c.key;
if (!containsKey(key) ||
!((get(key)) == (c.value))) {
return false;
}
}
return true;
}
/**
* Ensure this container can hold at least the
* given number of keys (entries) without resizing its buffers.
*
* @param expectedElements The total number of keys, inclusive.
*/
@Override
public void ensureCapacity(int expectedElements) {
if (expectedElements > resizeAt || keys == null) {
final long[] prevKeys = this.keys;
final int[] prevValues = this.values;
allocateBuffers(minBufferSize(expectedElements, loadFactor));
if (prevKeys != null && !isEmpty()) {
rehash(prevKeys, prevValues);
}
}
}
/**
* An iterator implementation for {@link #iterator}.
*/
private final class EntryIterator extends AbstractIterator {
private final LongIntCursor cursor;
private final int max = mask + 1;
private int slot = -1;
public EntryIterator() {
cursor = new LongIntCursor();
}
@Override
protected LongIntCursor fetch() {
if (slot < max) {
long existing;
for (slot++; slot < max; slot++) {
if (!((existing = keys[slot]) == 0)) {
cursor.index = slot;
cursor.key = existing;
cursor.value = values[slot];
return cursor;
}
}
}
if (slot == max && hasEmptyKey) {
cursor.index = slot;
cursor.key = 0L;
cursor.value = values[max];
slot++;
return cursor;
}
return done();
}
}
/**
* {@inheritDoc}
*/
@Override
public Iterator iterator() {
return new EntryIterator();
}
/**
* {@inheritDoc}
*/
@Override
public T forEach(T procedure) {
final long[] keys = this.keys;
final int[] values = this.values;
if (hasEmptyKey) {
procedure.apply(0L, values[mask + 1]);
}
for (int slot = 0, max = this.mask; slot <= max; slot++) {
if (!((keys[slot]) == 0)) {
procedure.apply(keys[slot], values[slot]);
}
}
return procedure;
}
/**
* {@inheritDoc}
*/
@Override
public T forEach(T predicate) {
final long[] keys = this.keys;
final int[] values = this.values;
if (hasEmptyKey) {
if (!predicate.apply(0L, values[mask + 1])) {
return predicate;
}
}
for (int slot = 0, max = this.mask; slot <= max; slot++) {
if (!((keys[slot]) == 0)) {
if (!predicate.apply(keys[slot], values[slot])) {
break;
}
}
}
return predicate;
}
/**
* Returns a specialized view of the keys of this associated container. The
* view additionally implements {@link ObjectLookupContainer}.
*/
public KeysContainer keys() {
return new KeysContainer();
}
/**
* A view of the keys inside this hash map.
*/
public final class KeysContainer extends AbstractLongCollection
implements LongLookupContainer {
private final LongIntHashMap owner = LongIntHashMap.this;
@Override
public boolean contains(long e) {
return owner.containsKey(e);
}
@Override
public T forEach(final T procedure) {
owner.forEach(new LongIntProcedure() {
@Override
public void apply(long key, int value) {
procedure.apply(key);
}
});
return procedure;
}
@Override
public T forEach(final T predicate) {
owner.forEach(new LongIntPredicate() {
@Override
public boolean apply(long key, int value) {
return predicate.apply(key);
}
});
return predicate;
}
@Override
public boolean isEmpty() {
return owner.isEmpty();
}
@Override
public Iterator iterator() {
return new KeysIterator();
}
@Override
public int size() {
return owner.size();
}
@Override
public void clear() {
owner.clear();
}
@Override
public void release() {
owner.release();
}
@Override
public int removeAll(LongPredicate predicate) {
return owner.removeAll(predicate);
}
@Override
public int removeAll(final long e) {
final boolean hasKey = owner.containsKey(e);
if (hasKey) {
owner.remove(e);
return 1;
} else {
return 0;
}
}
};
/**
* An iterator over the set of assigned keys.
*/
private final class KeysIterator extends AbstractIterator {
private final LongCursor cursor;
private final int max = mask + 1;
private int slot = -1;
public KeysIterator() {
cursor = new LongCursor();
}
@Override
protected LongCursor fetch() {
if (slot < max) {
long existing;
for (slot++; slot < max; slot++) {
if (!((existing = keys[slot]) == 0)) {
cursor.index = slot;
cursor.value = existing;
return cursor;
}
}
}
if (slot == max && hasEmptyKey) {
cursor.index = slot;
cursor.value = 0L;
slot++;
return cursor;
}
return done();
}
}
/**
* @return Returns a container with all values stored in this map.
*/
@Override
public IntCollection values() {
return new ValuesContainer();
}
/**
* A view over the set of values of this map.
*/
private final class ValuesContainer extends AbstractIntCollection {
private final LongIntHashMap owner = LongIntHashMap.this;
@Override
public int size() {
return owner.size();
}
@Override
public boolean isEmpty() {
return owner.isEmpty();
}
@Override
public boolean contains(int value) {
for (LongIntCursor c : owner) {
if (((c.value) == (value))) {
return true;
}
}
return false;
}
@Override
public T forEach(T procedure) {
for (LongIntCursor c : owner) {
procedure.apply(c.value);
}
return procedure;
}
@Override
public T forEach(T predicate) {
for (LongIntCursor c : owner) {
if (!predicate.apply(c.value)) {
break;
}
}
return predicate;
}
@Override
public Iterator iterator() {
return new ValuesIterator();
}
@Override
public int removeAll(final int e) {
return owner.removeAll(new LongIntPredicate() {
@Override
public boolean apply(long key, int value) {
return ((value) == (e));
}
});
}
@Override
public int removeAll(final IntPredicate predicate) {
return owner.removeAll(new LongIntPredicate() {
@Override
public boolean apply(long key, int value) {
return predicate.apply(value);
}
});
}
@Override
public void clear() {
owner.clear();
}
@Override
public void release() {
owner.release();
}
}
/**
* An iterator over the set of assigned values.
*/
private final class ValuesIterator extends AbstractIterator {
private final IntCursor cursor;
private final int max = mask + 1;
private int slot = -1;
public ValuesIterator() {
cursor = new IntCursor();
}
@Override
protected IntCursor fetch() {
if (slot < max) {
for (slot++; slot < max; slot++) {
if (!(( keys[slot]) == 0)) {
cursor.index = slot;
cursor.value = values[slot];
return cursor;
}
}
}
if (slot == max && hasEmptyKey) {
cursor.index = slot;
cursor.value = values[max];
slot++;
return cursor;
}
return done();
}
}
/**
* {@inheritDoc}
*/
@Override
public LongIntHashMap clone() {
try {
/* */
LongIntHashMap cloned = (LongIntHashMap) super.clone();
cloned.keys = keys.clone();
cloned.values = values.clone();
cloned.hasEmptyKey = cloned.hasEmptyKey;
cloned.orderMixer = orderMixer.clone();
return cloned;
} catch (CloneNotSupportedException e) {
throw new RuntimeException(e);
}
}
/**
* Convert the contents of this map to a human-friendly string.
*/
@Override
public String toString() {
final StringBuilder buffer = new StringBuilder();
buffer.append("[");
boolean first = true;
for (LongIntCursor cursor : this) {
if (!first) {
buffer.append(", ");
}
buffer.append(cursor.key);
buffer.append("=>");
buffer.append(cursor.value);
first = false;
}
buffer.append("]");
return buffer.toString();
}
@Override
public String visualizeKeyDistribution(int characters) {
return LongBufferVisualizer.visualizeKeyDistribution(keys, mask, characters);
}
/**
* Creates a hash map from two index-aligned arrays of key-value pairs.
*/
public static LongIntHashMap from(long[] keys, int[] values) {
if (keys.length != values.length) {
throw new IllegalArgumentException("Arrays of keys and values must have an identical length.");
}
LongIntHashMap map = new LongIntHashMap(keys.length);
for (int i = 0; i < keys.length; i++) {
map.put(keys[i], values[i]);
}
return map;
}
/**
* Returns a hash code for the given key.
*
* The default implementation mixes the hash of the key with {@link #keyMixer}
* to differentiate hash order of keys between hash containers. Helps
* alleviate problems resulting from linear conflict resolution in open
* addressing.
*
* The output from this function should evenly distribute keys across the
* entire integer range.
*/
protected
int hashKey(long key) {
assert !((key) == 0); // Handled as a special case (empty slot marker).
return BitMixer.mix(key, this.keyMixer);
}
/**
* Validate load factor range and return it. Override and suppress if you need
* insane load factors.
*/
protected double verifyLoadFactor(double loadFactor) {
checkLoadFactor(loadFactor, MIN_LOAD_FACTOR, MAX_LOAD_FACTOR);
return loadFactor;
}
/**
* Rehash from old buffers to new buffers.
*/
protected void rehash(long[] fromKeys, int[] fromValues) {
assert fromKeys.length == fromValues.length &&
HashContainers.checkPowerOfTwo(fromKeys.length - 1);
// Rehash all stored key/value pairs into the new buffers.
final long[] keys = this.keys;
final int[] values = this.values;
final int mask = this.mask;
long existing;
// Copy the zero element's slot, then rehash everything else.
int from = fromKeys.length - 1;
keys[keys.length - 1] = fromKeys[from];
values[values.length - 1] = fromValues[from];
while (--from >= 0) {
if (!((existing = fromKeys[from]) == 0)) {
int slot = hashKey(existing) & mask;
while (!((keys[slot]) == 0)) {
slot = (slot + 1) & mask;
}
keys[slot] = existing;
values[slot] = fromValues[from];
}
}
}
/**
* Allocate new internal buffers. This method attempts to allocate
* and assign internal buffers atomically (either allocations succeed or not).
*/
protected void allocateBuffers(int arraySize) {
assert Integer.bitCount(arraySize) == 1;
// Compute new hash mixer candidate before expanding.
final int newKeyMixer = this.orderMixer.newKeyMixer(arraySize);
// Ensure no change is done if we hit an OOM.
long[] prevKeys = this.keys;
int[] prevValues = this.values;
try {
int emptyElementSlot = 1;
this.keys = (new long [arraySize + emptyElementSlot]);
this.values = (new int [arraySize + emptyElementSlot]);
} catch (OutOfMemoryError e) {
this.keys = prevKeys;
this.values = prevValues;
throw new BufferAllocationException(
"Not enough memory to allocate buffers for rehashing: %,d -> %,d",
e,
this.mask + 1,
arraySize);
}
this.resizeAt = expandAtCount(arraySize, loadFactor);
this.keyMixer = newKeyMixer;
this.mask = arraySize - 1;
}
/**
* This method is invoked when there is a new key/ value pair to be inserted into
* the buffers but there is not enough empty slots to do so.
*
* New buffers are allocated. If this succeeds, we know we can proceed
* with rehashing so we assign the pending element to the previous buffer
* (possibly violating the invariant of having at least one empty slot)
* and rehash all keys, substituting new buffers at the end.
*/
protected void allocateThenInsertThenRehash(int slot, long pendingKey, int pendingValue) {
assert assigned == resizeAt
&& (( keys[slot]) == 0)
&& !((pendingKey) == 0);
// Try to allocate new buffers first. If we OOM, we leave in a consistent state.
final long[] prevKeys = this.keys;
final int[] prevValues = this.values;
allocateBuffers(nextBufferSize(mask + 1, size(), loadFactor));
assert this.keys.length > prevKeys.length;
// We have succeeded at allocating new data so insert the pending key/value at
// the free slot in the old arrays before rehashing.
prevKeys[slot] = pendingKey;
prevValues[slot] = pendingValue;
// Rehash old keys, including the pending key.
rehash(prevKeys, prevValues);
}
/**
* Shift all the slot-conflicting keys and values allocated to
* (and including) slot.
*/
protected void shiftConflictingKeys(int gapSlot) {
final long[] keys = this.keys;
final int[] values = this.values;
final int mask = this.mask;
// Perform shifts of conflicting keys to fill in the gap.
int distance = 0;
while (true) {
final int slot = (gapSlot + (++distance)) & mask;
final long existing = keys[slot];
if (((existing) == 0)) {
break;
}
final int idealSlot = hashKey(existing);
final int shift = (slot - idealSlot) & mask;
if (shift >= distance) {
// Entry at this position was originally at or before the gap slot.
// Move the conflict-shifted entry to the gap's position and repeat the procedure
// for any entries to the right of the current position, treating it
// as the new gap.
keys[gapSlot] = existing;
values[gapSlot] = values[slot];
gapSlot = slot;
distance = 0;
}
}
// Mark the last found gap slot without a conflict as empty.
keys[gapSlot] = 0L;
values[gapSlot] = 0;
assigned--;
}
}