package org.eclipse.collections.impl.map.mutable.primitive;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Arrays;
import java.util.Iterator;
import java.util.NoSuchElementException;
import org.eclipse.collections.api.IntIterable;
import org.eclipse.collections.api.LazyIntIterable;
import org.eclipse.collections.api.RichIterable;
import org.eclipse.collections.api.block.function.primitive.IntFunction;
import org.eclipse.collections.api.block.function.primitive.IntFunction0;
import org.eclipse.collections.api.block.function.primitive.IntToIntFunction;
import org.eclipse.collections.api.block.function.primitive.ObjectIntToObjectFunction;
import org.eclipse.collections.api.block.predicate.primitive.IntIntPredicate;
import org.eclipse.collections.api.block.procedure.Procedure;
import org.eclipse.collections.api.block.procedure.Procedure2;
import org.eclipse.collections.api.block.procedure.primitive.IntProcedure;
import org.eclipse.collections.api.block.procedure.primitive.IntIntProcedure;
import org.eclipse.collections.api.block.procedure.primitive.ObjectIntProcedure;
import org.eclipse.collections.impl.SpreadFunctions;
import org.eclipse.collections.api.collection.primitive.MutableIntCollection;
import org.eclipse.collections.api.iterator.IntIterator;
import org.eclipse.collections.api.iterator.MutableIntIterator;
import org.eclipse.collections.api.map.primitive.IntIntMap;
import org.eclipse.collections.api.map.primitive.ImmutableIntIntMap;
import org.eclipse.collections.api.map.primitive.MutableIntIntMap;
import org.eclipse.collections.api.set.primitive.IntSet;
import org.eclipse.collections.api.set.primitive.MutableIntSet;
import org.eclipse.collections.api.tuple.primitive.IntIntPair;
import org.eclipse.collections.impl.bag.mutable.primitive.IntHashBag;
import org.eclipse.collections.impl.factory.primitive.IntIntMaps;
import org.eclipse.collections.impl.iterator.UnmodifiableIntIterator;
import org.eclipse.collections.impl.lazy.AbstractLazyIterable;
import org.eclipse.collections.impl.lazy.primitive.AbstractLazyIntIterable;
import org.eclipse.collections.impl.set.mutable.primitive.IntHashSet;
import org.eclipse.collections.impl.tuple.primitive.PrimitiveTuples;
public class IntIntHashMap extends AbstractMutableIntValuesMap implements MutableIntIntMap, Externalizable, MutableIntKeysMap
{
private static final int EMPTY_VALUE = 0;
private static final long serialVersionUID = 1L;
private static final int EMPTY_KEY = 0;
private static final int REMOVED_KEY = 1;
private static final int CACHE_LINE_SIZE = 64;
private static final int KEY_SIZE = 4;
private static final int INITIAL_LINEAR_PROBE = CACHE_LINE_SIZE / KEY_SIZE / 2;
private static final int DEFAULT_INITIAL_CAPACITY = 8;
private int[] keysValues;
private int occupiedWithData;
private int occupiedWithSentinels;
private SentinelValues sentinelValues;
private boolean copyKeysOnWrite;
public IntIntHashMap()
{
this.allocateTable(DEFAULT_INITIAL_CAPACITY << 1);
}
public IntIntHashMap(int initialCapacity)
{
if (initialCapacity < 0)
{
throw new IllegalArgumentException("initial capacity cannot be less than 0");
}
int capacity = this.smallestPowerOfTwoGreaterThan(initialCapacity << 1);
this.allocateTable(capacity);
}
public IntIntHashMap(IntIntMap map)
{
if (map instanceof IntIntHashMap && ((IntIntHashMap) map).occupiedWithSentinels == 0)
{
IntIntHashMap hashMap = (IntIntHashMap) map;
this.occupiedWithData = hashMap.occupiedWithData;
if (hashMap.sentinelValues != null)
{
this.sentinelValues = hashMap.sentinelValues.copy();
}
this.keysValues = Arrays.copyOf(hashMap.keysValues, hashMap.keysValues.length);
}
else
{
int capacity = this.smallestPowerOfTwoGreaterThan(Math.max(map.size(), DEFAULT_INITIAL_CAPACITY) << 1);
this.allocateTable(capacity);
this.putAll(map);
}
}
public static IntIntHashMap newWithKeysValues(int key1, int value1)
{
return new IntIntHashMap(1).withKeyValue(key1, value1);
}
public static IntIntHashMap newWithKeysValues(int key1, int value1, int key2, int value2)
{
return new IntIntHashMap(2).withKeysValues(key1, value1, key2, value2);
}
public static IntIntHashMap newWithKeysValues(int key1, int value1, int key2, int value2, int key3, int value3)
{
return new IntIntHashMap(3).withKeysValues(key1, value1, key2, value2, key3, value3);
}
public static IntIntHashMap newWithKeysValues(int key1, int value1, int key2, int value2, int key3, int value3, int key4, int value4)
{
return new IntIntHashMap(4).withKeysValues(key1, value1, key2, value2, key3, value3, key4, value4);
}
private int smallestPowerOfTwoGreaterThan(int n)
{
return n > 1 ? Integer.highestOneBit(n - 1) << 1 : 1;
}
@Override
protected int getOccupiedWithData()
{
return this.occupiedWithData;
}
@Override
protected SentinelValues getSentinelValues()
{
return this.sentinelValues;
}
@Override
protected void setSentinelValuesNull()
{
this.sentinelValues = null;
}
@Override
protected int getEmptyValue()
{
return EMPTY_VALUE;
}
@Override
protected int getTableSize()
{
return this.keysValues.length / 2;
}
@Override
protected int getValueAtIndex(int index)
{
return this.keysValues[index * 2 + 1];
}
@Override
public boolean equals(Object obj)
{
if (this == obj)
{
return true;
}
if (!(obj instanceof IntIntMap))
{
return false;
}
IntIntMap other = (IntIntMap) obj;
if (this.size() != other.size())
{
return false;
}
if (this.sentinelValues == null)
{
if (other.containsKey(EMPTY_KEY) || other.containsKey(REMOVED_KEY))
{
return false;
}
}
else
{
if (this.sentinelValues.containsZeroKey && (!other.containsKey(EMPTY_KEY) || this.sentinelValues.zeroValue != other.getOrThrow(EMPTY_KEY)))
{
return false;
}
if (this.sentinelValues.containsOneKey && (!other.containsKey(REMOVED_KEY) || this.sentinelValues.oneValue != other.getOrThrow(REMOVED_KEY)))
{
return false;
}
}
for (int i = 0; i < this.keysValues.length; i += 2)
{
int key = this.keysValues[i];
if (isNonSentinel(key) && (!other.containsKey(key) || this.keysValues[i + 1] != other.getOrThrow(key)))
{
return false;
}
}
return true;
}
@Override
public int hashCode()
{
int result = 0;
if (this.sentinelValues != null)
{
if (this.sentinelValues.containsZeroKey)
{
result += EMPTY_KEY ^ this.sentinelValues.zeroValue;
}
if (this.sentinelValues.containsOneKey)
{
result += REMOVED_KEY ^ this.sentinelValues.oneValue;
}
}
for (int i = 0; i < this.keysValues.length; i += 2)
{
if (isNonSentinel(this.keysValues[i]))
{
result += this.keysValues[i] ^ this.keysValues[i + 1];
}
}
return result;
}
@Override
public String toString()
{
StringBuilder appendable = new StringBuilder();
appendable.append("{");
boolean first = true;
if (this.sentinelValues != null)
{
if (this.sentinelValues.containsZeroKey)
{
appendable.append(EMPTY_KEY).append("=").append(this.sentinelValues.zeroValue);
first = false;
}
if (this.sentinelValues.containsOneKey)
{
if (!first)
{
appendable.append(", ");
}
appendable.append(REMOVED_KEY).append("=").append(this.sentinelValues.oneValue);
first = false;
}
}
for (int i = 0; i < this.keysValues.length; i += 2)
{
int key = this.keysValues[i];
if (isNonSentinel(key))
{
if (!first)
{
appendable.append(", ");
}
appendable.append(key).append("=").append(this.keysValues[i + 1]);
first = false;
}
}
appendable.append("}");
return appendable.toString();
}
@Override
public MutableIntIterator intIterator()
{
return new InternalIntIterator();
}
@Override
public <V> V injectInto(V injectedValue, ObjectIntToObjectFunction<? super V, ? extends V> function)
{
V result = injectedValue;
if (this.sentinelValues != null)
{
if (this.sentinelValues.containsZeroKey)
{
result = function.valueOf(result, this.sentinelValues.zeroValue);
}
if (this.sentinelValues.containsOneKey)
{
result = function.valueOf(result, this.sentinelValues.oneValue);
}
}
for (int i = 0; i < this.keysValues.length; i += 2)
{
if (isNonSentinel(this.keysValues[i]))
{
result = function.valueOf(result, this.keysValues[i + 1]);
}
}
return result;
}
@Override
public void clear()
{
this.sentinelValues = null;
this.occupiedWithData = 0;
this.occupiedWithSentinels = 0;
if (this.copyKeysOnWrite)
{
this.copyKeys();
}
Arrays.fill(this.keysValues, 0);
}
@Override
public void put(int key, int value)
{
if (isEmptyKey(key))
{
this.putForEmptySentinel(value);
return;
}
if (isRemovedKey(key))
{
this.putForRemovedSentinel(value);
return;
}
int index = this.probe(key);
int keyAtIndex = this.keysValues[index];
if (keyAtIndex == key)
{
this.keysValues[index + 1] = value;
}
else
{
this.addKeyValueAtIndex(key, value, index);
}
}
private void putForRemovedSentinel(int value)
{
if (this.sentinelValues == null)
{
this.sentinelValues = new SentinelValues();
}
this.addRemovedKeyValue(value);
}
private void putForEmptySentinel(int value)
{
if (this.sentinelValues == null)
{
this.sentinelValues = new SentinelValues();
}
this.addEmptyKeyValue(value);
}
@Override
public void putAll(IntIntMap map)
{
map.forEachKeyValue(this::put);
}
@Override
public void removeKey(int key)
{
if (isEmptyKey(key))
{
if (this.sentinelValues == null || !this.sentinelValues.containsZeroKey)
{
return;
}
this.removeEmptyKey();
return;
}
if (isRemovedKey(key))
{
if (this.sentinelValues == null || !this.sentinelValues.containsOneKey)
{
return;
}
this.removeRemovedKey();
return;
}
int index = this.probe(key);
if (this.keysValues[index] == key)
{
this.removeKeyAtIndex(index);
}
}
@Override
public void remove(int key)
{
this.removeKey(key);
}
@Override
public int removeKeyIfAbsent(int key, int value)
{
if (isEmptyKey(key))
{
if (this.sentinelValues == null || !this.sentinelValues.containsZeroKey)
{
return value;
}
int oldValue = this.sentinelValues.zeroValue;
this.removeEmptyKey();
return oldValue;
}
if (isRemovedKey(key))
{
if (this.sentinelValues == null || !this.sentinelValues.containsOneKey)
{
return value;
}
int oldValue = this.sentinelValues.oneValue;
this.removeRemovedKey();
return oldValue;
}
int index = this.probe(key);
if (this.keysValues[index] == key)
{
int oldValue = this.keysValues[index + 1];
this.removeKeyAtIndex(index);
return oldValue;
}
return value;
}
@Override
public int getIfAbsentPut(int key, int value)
{
if (isEmptyKey(key))
{
if (this.sentinelValues == null)
{
this.sentinelValues = new SentinelValues();
this.addEmptyKeyValue(value);
return value;
}
if (this.sentinelValues.containsZeroKey)
{
return this.sentinelValues.zeroValue;
}
this.addEmptyKeyValue(value);
return value;
}
if (isRemovedKey(key))
{
if (this.sentinelValues == null)
{
this.sentinelValues = new SentinelValues();
this.addRemovedKeyValue(value);
return value;
}
if (this.sentinelValues.containsOneKey)
{
return this.sentinelValues.oneValue;
}
this.addRemovedKeyValue(value);
return value;
}
int index = this.probe(key);
if (this.keysValues[index] == key)
{
return this.keysValues[index + 1];
}
this.addKeyValueAtIndex(key, value, index);
return value;
}
@Override
public int getIfAbsentPut(int key, IntFunction0 function)
{
if (isEmptyKey(key))
{
if (this.sentinelValues == null)
{
int value = function.value();
this.sentinelValues = new SentinelValues();
this.addEmptyKeyValue(value);
return value;
}
if (this.sentinelValues.containsZeroKey)
{
return this.sentinelValues.zeroValue;
}
int value = function.value();
this.addEmptyKeyValue(value);
return value;
}
if (isRemovedKey(key))
{
if (this.sentinelValues == null)
{
int value = function.value();
this.sentinelValues = new SentinelValues();
this.addRemovedKeyValue(value);
return value;
}
if (this.sentinelValues.containsOneKey)
{
return this.sentinelValues.oneValue;
}
int value = function.value();
this.addRemovedKeyValue(value);
return value;
}
int index = this.probe(key);
if (this.keysValues[index] == key)
{
return this.keysValues[index + 1];
}
int value = function.value();
this.addKeyValueAtIndex(key, value, index);
return value;
}
@Override
public <P> int getIfAbsentPutWith(int key, IntFunction<? super P> function, P parameter)
{
if (isEmptyKey(key))
{
if (this.sentinelValues == null)
{
int value = function.intValueOf(parameter);
this.sentinelValues = new SentinelValues();
this.addEmptyKeyValue(value);
return value;
}
if (this.sentinelValues.containsZeroKey)
{
return this.sentinelValues.zeroValue;
}
int value = function.intValueOf(parameter);
this.addEmptyKeyValue(value);
return value;
}
if (isRemovedKey(key))
{
if (this.sentinelValues == null)
{
int value = function.intValueOf(parameter);
this.sentinelValues = new SentinelValues();
this.addRemovedKeyValue(value);
return value;
}
if (this.sentinelValues.containsOneKey)
{
return this.sentinelValues.oneValue;
}
int value = function.intValueOf(parameter);
this.addRemovedKeyValue(value);
return value;
}
int index = this.probe(key);
if (this.keysValues[index] == key)
{
return this.keysValues[index + 1];
}
int value = function.intValueOf(parameter);
this.addKeyValueAtIndex(key, value, index);
return value;
}
@Override
public int getIfAbsentPutWithKey(int key, IntToIntFunction function)
{
if (isEmptyKey(key))
{
if (this.sentinelValues == null)
{
int value = function.valueOf(key);
this.sentinelValues = new SentinelValues();
this.addEmptyKeyValue(value);
return value;
}
if (this.sentinelValues.containsZeroKey)
{
return this.sentinelValues.zeroValue;
}
int value = function.valueOf(key);
this.addEmptyKeyValue(value);
return value;
}
if (isRemovedKey(key))
{
if (this.sentinelValues == null)
{
int value = function.valueOf(key);
this.sentinelValues = new SentinelValues();
this.addRemovedKeyValue(value);
return value;
}
if (this.sentinelValues.containsOneKey)
{
return this.sentinelValues.oneValue;
}
int value = function.valueOf(key);
this.addRemovedKeyValue(value);
return value;
}
int index = this.probe(key);
if (this.keysValues[index] == key)
{
return this.keysValues[index + 1];
}
int value = function.valueOf(key);
this.addKeyValueAtIndex(key, value, index);
return value;
}
@Override
public int addToValue(int key, int toBeAdded)
{
if (isEmptyKey(key))
{
if (this.sentinelValues == null)
{
this.sentinelValues = new SentinelValues();
this.addEmptyKeyValue(toBeAdded);
}
else if (this.sentinelValues.containsZeroKey)
{
this.sentinelValues.zeroValue += toBeAdded;
}
else
{
this.addEmptyKeyValue(toBeAdded);
}
return this.sentinelValues.zeroValue;
}
if (isRemovedKey(key))
{
if (this.sentinelValues == null)
{
this.sentinelValues = new SentinelValues();
this.addRemovedKeyValue(toBeAdded);
}
else if (this.sentinelValues.containsOneKey)
{
this.sentinelValues.oneValue += toBeAdded;
}
else
{
this.addRemovedKeyValue(toBeAdded);
}
return this.sentinelValues.oneValue;
}
int index = this.probe(key);
if (this.keysValues[index] == key)
{
this.keysValues[index + 1] += toBeAdded;
return this.keysValues[index + 1];
}
this.addKeyValueAtIndex(key, toBeAdded, index);
return toBeAdded;
}
private void addKeyValueAtIndex(int key, int value, int index)
{
if (this.keysValues[index] == REMOVED_KEY)
{
this.occupiedWithSentinels--;
}
if (this.copyKeysOnWrite)
{
this.copyKeys();
}
this.keysValues[index] = key;
this.keysValues[index + 1] = value;
this.occupiedWithData++;
if (this.occupiedWithData + this.occupiedWithSentinels > this.maxOccupiedWithData())
{
this.rehashAndGrow();
}
}
private void removeKeyAtIndex(int index)
{
if (this.copyKeysOnWrite)
{
this.copyKeys();
}
this.keysValues[index] = REMOVED_KEY;
this.keysValues[index + 1] = EMPTY_VALUE;
this.occupiedWithData--;
this.occupiedWithSentinels++;
}
private void copyKeys()
{
int[] copy = new int[this.keysValues.length];
System.arraycopy(this.keysValues, 0, copy, 0, this.keysValues.length);
this.keysValues = copy;
this.copyKeysOnWrite = false;
}
@Override
public int updateValue(int key, int initialValueIfAbsent, IntToIntFunction function)
{
if (isEmptyKey(key))
{
if (this.sentinelValues == null)
{
this.sentinelValues = new SentinelValues();
this.addEmptyKeyValue(function.valueOf(initialValueIfAbsent));
}
else if (this.sentinelValues.containsZeroKey)
{
this.sentinelValues.zeroValue = function.valueOf(this.sentinelValues.zeroValue);
}
else
{
this.addEmptyKeyValue(function.valueOf(initialValueIfAbsent));
}
return this.sentinelValues.zeroValue;
}
if (isRemovedKey(key))
{
if (this.sentinelValues == null)
{
this.sentinelValues = new SentinelValues();
this.addRemovedKeyValue(function.valueOf(initialValueIfAbsent));
}
else if (this.sentinelValues.containsOneKey)
{
this.sentinelValues.oneValue = function.valueOf(this.sentinelValues.oneValue);
}
else
{
this.addRemovedKeyValue(function.valueOf(initialValueIfAbsent));
}
return this.sentinelValues.oneValue;
}
int index = this.probe(key);
if (this.keysValues[index] == key)
{
this.keysValues[index + 1] = function.valueOf(this.keysValues[index + 1]);
return this.keysValues[index + 1];
}
int value = function.valueOf(initialValueIfAbsent);
this.addKeyValueAtIndex(key, value, index);
return value;
}
@Override
public IntIntHashMap withKeyValue(int key1, int value1)
{
this.put(key1, value1);
return this;
}
public IntIntHashMap withKeysValues(int key1, int value1, int key2, int value2)
{
this.put(key1, value1);
this.put(key2, value2);
return this;
}
public IntIntHashMap withKeysValues(int key1, int value1, int key2, int value2, int key3, int value3)
{
this.put(key1, value1);
this.put(key2, value2);
this.put(key3, value3);
return this;
}
public IntIntHashMap withKeysValues(int key1, int value1, int key2, int value2, int key3, int value3, int key4, int value4)
{
this.put(key1, value1);
this.put(key2, value2);
this.put(key3, value3);
this.put(key4, value4);
return this;
}
@Override
public IntIntHashMap withoutKey(int key)
{
this.removeKey(key);
return this;
}
@Override
public IntIntHashMap withoutAllKeys(IntIterable keys)
{
keys.forEach(this::removeKey);
return this;
}
@Override
public MutableIntIntMap asUnmodifiable()
{
return new UnmodifiableIntIntMap(this);
}
@Override
public MutableIntIntMap asSynchronized()
{
return new SynchronizedIntIntMap(this);
}
@Override
public ImmutableIntIntMap toImmutable()
{
return IntIntMaps.immutable.ofAll(this);
}
@Override
public int get(int key)
{
return this.getIfAbsent(key, EMPTY_VALUE);
}
@Override
public int getIfAbsent(int key, int ifAbsent)
{
if (isEmptyKey(key) || isRemovedKey(key))
{
return this.getForSentinel(key, ifAbsent);
}
if (this.occupiedWithSentinels == 0)
{
return this.fastGetIfAbsent(key, ifAbsent);
}
return this.slowGetIfAbsent(key, ifAbsent);
}
private int getForSentinel(int key, int ifAbsent)
{
if (isEmptyKey(key))
{
if (this.sentinelValues == null || !this.sentinelValues.containsZeroKey)
{
return ifAbsent;
}
return this.sentinelValues.zeroValue;
}
if (this.sentinelValues == null || !this.sentinelValues.containsOneKey)
{
return ifAbsent;
}
return this.sentinelValues.oneValue;
}
private int slowGetIfAbsent(int key, int ifAbsent)
{
int index = this.probe(key);
if (this.keysValues[index] == key)
{
return this.keysValues[index + 1];
}
return ifAbsent;
}
private int fastGetIfAbsent(int key, int ifAbsent)
{
int index = this.mask((int) key) << 1;
for (int i = 0; i < INITIAL_LINEAR_PROBE; i += 2)
{
int keyAtIndex = this.keysValues[index];
if (keyAtIndex == key)
{
return this.keysValues[index + 1];
}
if (keyAtIndex == EMPTY_KEY)
{
return ifAbsent;
}
index = (index + 2) & (this.keysValues.length - 1);
}
return this.slowGetIfAbsentTwo(key, ifAbsent);
}
private int slowGetIfAbsentTwo(int key, int ifAbsent)
{
int index = this.probeTwo(key, -1);
if (this.keysValues[index] == key)
{
return this.keysValues[index + 1];
}
return ifAbsent;
}
@Override
public int getOrThrow(int key)
{
if (isEmptyKey(key))
{
if (this.sentinelValues == null || !this.sentinelValues.containsZeroKey)
{
throw new IllegalStateException("Key " + key + " not present.");
}
return this.sentinelValues.zeroValue;
}
if (isRemovedKey(key))
{
if (this.sentinelValues == null || !this.sentinelValues.containsOneKey)
{
throw new IllegalStateException("Key " + key + " not present.");
}
return this.sentinelValues.oneValue;
}
int index = this.probe(key);
if (isNonSentinel(this.keysValues[index]))
{
return this.keysValues[index + 1];
}
throw new IllegalStateException("Key " + key + " not present.");
}
@Override
public boolean containsKey(int key)
{
if (isEmptyKey(key))
{
return this.sentinelValues != null && this.sentinelValues.containsZeroKey;
}
if (isRemovedKey(key))
{
return this.sentinelValues != null && this.sentinelValues.containsOneKey;
}
return this.keysValues[this.probe(key)] == key;
}
@Override
public void forEachKey(IntProcedure procedure)
{
if (this.sentinelValues != null)
{
if (this.sentinelValues.containsZeroKey)
{
procedure.value(EMPTY_KEY);
}
if (this.sentinelValues.containsOneKey)
{
procedure.value(REMOVED_KEY);
}
}
for (int i = 0; i < this.keysValues.length; i += 2)
{
if (isNonSentinel(this.keysValues[i]))
{
procedure.value(this.keysValues[i]);
}
}
}
@Override
public void forEachKeyValue(IntIntProcedure procedure)
{
if (this.sentinelValues != null)
{
if (this.sentinelValues.containsZeroKey)
{
procedure.value(EMPTY_KEY, this.sentinelValues.zeroValue);
}
if (this.sentinelValues.containsOneKey)
{
procedure.value(REMOVED_KEY, this.sentinelValues.oneValue);
}
}
for (int i = 0; i < this.keysValues.length; i += 2)
{
if (isNonSentinel(this.keysValues[i]))
{
procedure.value(this.keysValues[i], this.keysValues[i + 1]);
}
}
}
@Override
public LazyIntIterable keysView()
{
return new KeysView();
}
@Override
public RichIterable<IntIntPair> keyValuesView()
{
return new KeyValuesView();
}
@Override
public MutableIntIntMap flipUniqueValues()
{
MutableIntIntMap result = IntIntMaps.mutable.empty();
this.forEachKeyValue((key, value) -> {
if (result.containsKey(value))
{
throw new IllegalStateException("Duplicate value: " + value + " found at key: " + result.get(value) + " and key: " + key);
}
result.put(value, key);
});
return result;
}
@Override
public IntIntHashMap select(IntIntPredicate predicate)
{
IntIntHashMap result = new IntIntHashMap();
if (this.sentinelValues != null)
{
if (this.sentinelValues.containsZeroKey && predicate.accept(EMPTY_KEY, this.sentinelValues.zeroValue))
{
result.put(EMPTY_KEY, this.sentinelValues.zeroValue);
}
if (this.sentinelValues.containsOneKey && predicate.accept(REMOVED_KEY, this.sentinelValues.oneValue))
{
result.put(REMOVED_KEY, this.sentinelValues.oneValue);
}
}
for (int i = 0; i < this.keysValues.length; i += 2)
{
if (isNonSentinel(this.keysValues[i]) && predicate.accept(this.keysValues[i], this.keysValues[i + 1]))
{
result.put(this.keysValues[i], this.keysValues[i + 1]);
}
}
return result;
}
@Override
public IntIntHashMap reject(IntIntPredicate predicate)
{
IntIntHashMap result = new IntIntHashMap();
if (this.sentinelValues != null)
{
if (this.sentinelValues.containsZeroKey && !predicate.accept(EMPTY_KEY, this.sentinelValues.zeroValue))
{
result.put(EMPTY_KEY, this.sentinelValues.zeroValue);
}
if (this.sentinelValues.containsOneKey && !predicate.accept(REMOVED_KEY, this.sentinelValues.oneValue))
{
result.put(REMOVED_KEY, this.sentinelValues.oneValue);
}
}
for (int i = 0; i < this.keysValues.length; i += 2)
{
if (isNonSentinel(this.keysValues[i]) && !predicate.accept(this.keysValues[i], this.keysValues[i + 1]))
{
result.put(this.keysValues[i], this.keysValues[i + 1]);
}
}
return result;
}
@Override
public void writeExternal(ObjectOutput out) throws IOException
{
out.writeInt(this.size());
if (this.sentinelValues != null)
{
if (this.sentinelValues.containsZeroKey)
{
out.writeInt(EMPTY_KEY);
out.writeInt(this.sentinelValues.zeroValue);
}
if (this.sentinelValues.containsOneKey)
{
out.writeInt(REMOVED_KEY);
out.writeInt(this.sentinelValues.oneValue);
}
}
for (int i = 0; i < this.keysValues.length; i += 2)
{
if (isNonSentinel(this.keysValues[i]))
{
out.writeInt(this.keysValues[i]);
out.writeInt(this.keysValues[i + 1]);
}
}
}
@Override
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
{
int size = in.readInt();
for (int i = 0; i < size; i++)
{
this.put(in.readInt(), in.readInt());
}
}
public void compact()
{
this.rehash(this.smallestPowerOfTwoGreaterThan(this.size()));
}
private void rehashAndGrow()
{
this.rehash(this.keysValues.length);
}
private void rehash(int newCapacity)
{
int oldLength = this.keysValues.length;
int[] old = this.keysValues;
this.allocateTable(newCapacity);
this.occupiedWithData = 0;
this.occupiedWithSentinels = 0;
for (int i = 0; i < oldLength; i += 2)
{
if (isNonSentinel(old[i]))
{
this.put(old[i], old[i + 1]);
}
}
}
int probe(int element)
{
int index = this.mask((int) element) << 1;
int keyAtIndex = this.keysValues[index];
if (keyAtIndex == element || keyAtIndex == EMPTY_KEY)
{
return index;
}
int removedIndex = keyAtIndex == REMOVED_KEY ? index : -1;
for (int i = 2; i < INITIAL_LINEAR_PROBE; i += 2)
{
int nextIndex = (index + i) & (this.keysValues.length - 1);
keyAtIndex = this.keysValues[nextIndex];
if (keyAtIndex == element)
{
return nextIndex;
}
if (keyAtIndex == EMPTY_KEY)
{
return removedIndex == -1 ? nextIndex : removedIndex;
}
if (keyAtIndex == REMOVED_KEY && removedIndex == -1)
{
removedIndex = nextIndex;
}
}
return this.probeTwo(element, removedIndex);
}
int probeTwo(int element, int removedIndex)
{
int index = this.spreadTwoAndMask(element) << 1;
for (int i = 0; i < INITIAL_LINEAR_PROBE; i += 2)
{
int nextIndex = (index + i) & (this.keysValues.length - 1);
int keyAtIndex = this.keysValues[nextIndex];
if (keyAtIndex == element)
{
return nextIndex;
}
if (keyAtIndex == EMPTY_KEY)
{
return removedIndex == -1 ? nextIndex : removedIndex;
}
if (keyAtIndex == REMOVED_KEY && removedIndex == -1)
{
removedIndex = nextIndex;
}
}
return this.probeThree(element, removedIndex);
}
int probeThree(int element, int removedIndex)
{
int nextIndex = (int) SpreadFunctions.intSpreadOne(element) << 1;
int spreadTwo = Integer.reverse(SpreadFunctions.intSpreadTwo(element)) | 1;
while (true)
{
nextIndex = this.mask((nextIndex >> 1) + spreadTwo) << 1;
int keyAtIndex = this.keysValues[nextIndex];
if (keyAtIndex == element)
{
return nextIndex;
}
if (keyAtIndex == EMPTY_KEY)
{
return removedIndex == -1 ? nextIndex : removedIndex;
}
if (keyAtIndex == REMOVED_KEY && removedIndex == -1)
{
removedIndex = nextIndex;
}
}
}
int spreadAndMask(int element)
{
int code = SpreadFunctions.intSpreadOne(element);
return this.mask(code);
}
int spreadTwoAndMask(int element)
{
int code = SpreadFunctions.intSpreadTwo(element);
return this.mask(code);
}
private int mask(int spread)
{
return spread & ((this.keysValues.length >> 1) - 1);
}
private void allocateTable(int sizeToAllocate)
{
this.keysValues = new int[sizeToAllocate << 1];
}
private static boolean isEmptyKey(int key)
{
return key == EMPTY_KEY;
}
private static boolean isRemovedKey(int key)
{
return key == REMOVED_KEY;
}
private static boolean isNonSentinel(int key)
{
return !isEmptyKey(key) && !isRemovedKey(key);
}
@Override
protected boolean isNonSentinelAtIndex(int index)
{
return !isEmptyKey(this.keysValues[index * 2]) && !isRemovedKey(this.keysValues[index * 2]);
}
private int maxOccupiedWithData()
{
return this.keysValues.length >> 2;
}
private int maxOccupiedWithSentinels()
{
return this.keysValues.length >> 3;
}
private class InternalIntIterator implements MutableIntIterator
{
private int count;
private int position;
private int lastKey;
private boolean handledZero;
private boolean handledOne;
private boolean canRemove;
@Override
public boolean hasNext()
{
return this.count < IntIntHashMap.this.size();
}
@Override
public int next()
{
if (!this.hasNext())
{
throw new NoSuchElementException("next() called, but the iterator is exhausted");
}
this.count++;
this.canRemove = true;
if (!this.handledZero)
{
this.handledZero = true;
if (IntIntHashMap.this.containsKey(EMPTY_KEY))
{
this.lastKey = EMPTY_KEY;
return IntIntHashMap.this.get(EMPTY_KEY);
}
}
if (!this.handledOne)
{
this.handledOne = true;
if (IntIntHashMap.this.containsKey(REMOVED_KEY))
{
this.lastKey = REMOVED_KEY;
return IntIntHashMap.this.get(REMOVED_KEY);
}
}
int[] keys = IntIntHashMap.this.keysValues;
while (!isNonSentinel(keys[this.position]))
{
this.position += 2;
}
this.lastKey = keys[this.position];
int result = IntIntHashMap.this.keysValues[this.position + 1];
this.position += 2;
return result;
}
@Override
public void remove()
{
if (!this.canRemove)
{
throw new IllegalStateException();
}
IntIntHashMap.this.removeKey(this.lastKey);
this.count--;
this.canRemove = false;
}
}
private class KeysView extends AbstractLazyIntIterable
{
@Override
public IntIterator intIterator()
{
return new UnmodifiableIntIterator(new KeySetIterator());
}
@Override
public void each(IntProcedure procedure)
{
IntIntHashMap.this.forEachKey(procedure);
}
}
private class KeySetIterator implements MutableIntIterator
{
private int count;
private int position;
private int lastKey;
private boolean handledZero;
private boolean handledOne;
private boolean canRemove;
@Override
public boolean hasNext()
{
return this.count < IntIntHashMap.this.size();
}
@Override
public int next()
{
if (!this.hasNext())
{
throw new NoSuchElementException("next() called, but the iterator is exhausted");
}
this.count++;
this.canRemove = true;
if (!this.handledZero)
{
this.handledZero = true;
if (IntIntHashMap.this.containsKey(EMPTY_KEY))
{
this.lastKey = EMPTY_KEY;
return this.lastKey;
}
}
if (!this.handledOne)
{
this.handledOne = true;
if (IntIntHashMap.this.containsKey(REMOVED_KEY))
{
this.lastKey = REMOVED_KEY;
return this.lastKey;
}
}
int[] keys = IntIntHashMap.this.keysValues;
while (!isNonSentinel(keys[this.position]))
{
this.position += 2;
}
this.lastKey = keys[this.position];
this.position += 2;
return this.lastKey;
}
@Override
public void remove()
{
if (!this.canRemove)
{
throw new IllegalStateException();
}
IntIntHashMap.this.removeKey(this.lastKey);
this.count--;
this.canRemove = false;
}
}
@Override
public MutableIntSet keySet()
{
return new KeySet();
}
private class KeySet extends AbstractMutableIntKeySet
{
@Override
protected MutableIntKeysMap getOuter()
{
return IntIntHashMap.this;
}
@Override
protected SentinelValues getSentinelValues()
{
return IntIntHashMap.this.sentinelValues;
}
@Override
protected int getKeyAtIndex(int index)
{
return IntIntHashMap.this.keysValues[index * 2];
}
@Override
protected int getTableSize()
{
return IntIntHashMap.this.keysValues.length / 2;
}
@Override
public MutableIntIterator intIterator()
{
return new KeySetIterator();
}
@Override
public boolean retainAll(IntIterable source)
{
int oldSize = IntIntHashMap.this.size();
final IntSet sourceSet = source instanceof IntSet ? (IntSet) source : source.toSet();
IntIntHashMap retained = IntIntHashMap.this.select((int key, int value) -> sourceSet.contains(key));
if (retained.size() != oldSize)
{
IntIntHashMap.this.keysValues = retained.keysValues;
IntIntHashMap.this.sentinelValues = retained.sentinelValues;
IntIntHashMap.this.occupiedWithData = retained.occupiedWithData;
IntIntHashMap.this.occupiedWithSentinels = retained.occupiedWithSentinels;
return true;
}
return false;
}
@Override
public boolean retainAll(int... source)
{
return this.retainAll(IntHashSet.newSetWith(source));
}
@Override
public IntSet freeze()
{
IntIntHashMap.this.copyKeysOnWrite = true;
boolean containsZeroKey = false;
boolean containsOneKey = false;
if (IntIntHashMap.this.sentinelValues != null)
{
containsZeroKey = IntIntHashMap.this.sentinelValues.containsZeroKey;
containsOneKey = IntIntHashMap.this.sentinelValues.containsOneKey;
}
return new ImmutableIntIntMapKeySet(IntIntHashMap.this.keysValues, IntIntHashMap.this.occupiedWithData, containsZeroKey, containsOneKey);
}
@Override
public MutableIntSet newEmpty()
{
return new IntHashSet();
}
}
@Override
public MutableIntCollection values()
{
return new ValuesCollection();
}
private class ValuesCollection extends AbstractIntValuesCollection
{
@Override
public MutableIntIterator intIterator()
{
return IntIntHashMap.this.intIterator();
}
@Override
public boolean remove(int item)
{
int oldSize = IntIntHashMap.this.size();
if (IntIntHashMap.this.sentinelValues != null)
{
if (IntIntHashMap.this.sentinelValues.containsZeroKey && item == IntIntHashMap.this.sentinelValues.zeroValue)
{
IntIntHashMap.this.removeKey(EMPTY_KEY);
}
if (IntIntHashMap.this.sentinelValues.containsOneKey && item == IntIntHashMap.this.sentinelValues.oneValue)
{
IntIntHashMap.this.removeKey(REMOVED_KEY);
}
}
for (int i = 0; i < IntIntHashMap.this.keysValues.length; i += 2)
{
if (isNonSentinel(IntIntHashMap.this.keysValues[i]) && item == IntIntHashMap.this.keysValues[i + 1])
{
IntIntHashMap.this.removeKey(IntIntHashMap.this.keysValues[i]);
}
}
return oldSize != IntIntHashMap.this.size();
}
@Override
public boolean retainAll(IntIterable source)
{
int oldSize = IntIntHashMap.this.size();
final IntSet sourceSet = source instanceof IntSet ? (IntSet) source : source.toSet();
IntIntHashMap retained = IntIntHashMap.this.select((int key, int value) -> sourceSet.contains(value));
if (retained.size() != oldSize)
{
IntIntHashMap.this.keysValues = retained.keysValues;
IntIntHashMap.this.sentinelValues = retained.sentinelValues;
IntIntHashMap.this.occupiedWithData = retained.occupiedWithData;
IntIntHashMap.this.occupiedWithSentinels = retained.occupiedWithSentinels;
return true;
}
return false;
}
@Override
public MutableIntCollection newEmpty()
{
return new IntHashBag();
}
}
private class KeyValuesView extends AbstractLazyIterable<IntIntPair>
{
@Override
public void each(Procedure<? super IntIntPair> procedure)
{
if (IntIntHashMap.this.sentinelValues != null)
{
if (IntIntHashMap.this.sentinelValues.containsZeroKey)
{
procedure.value(PrimitiveTuples.pair(EMPTY_KEY, IntIntHashMap.this.sentinelValues.zeroValue));
}
if (IntIntHashMap.this.sentinelValues.containsOneKey)
{
procedure.value(PrimitiveTuples.pair(REMOVED_KEY, IntIntHashMap.this.sentinelValues.oneValue));
}
}
for (int i = 0; i < IntIntHashMap.this.keysValues.length; i += 2)
{
if (isNonSentinel(IntIntHashMap.this.keysValues[i]))
{
procedure.value(PrimitiveTuples.pair(IntIntHashMap.this.keysValues[i], IntIntHashMap.this.keysValues[i + 1]));
}
}
}
@Override
public void forEachWithIndex(ObjectIntProcedure<? super IntIntPair> objectIntProcedure)
{
int index = 0;
if (IntIntHashMap.this.sentinelValues != null)
{
if (IntIntHashMap.this.sentinelValues.containsZeroKey)
{
objectIntProcedure.value(PrimitiveTuples.pair(EMPTY_KEY, IntIntHashMap.this.sentinelValues.zeroValue), index);
index++;
}
if (IntIntHashMap.this.sentinelValues.containsOneKey)
{
objectIntProcedure.value(PrimitiveTuples.pair(REMOVED_KEY, IntIntHashMap.this.sentinelValues.oneValue), index);
index++;
}
}
for (int i = 0; i < IntIntHashMap.this.keysValues.length; i += 2)
{
if (isNonSentinel(IntIntHashMap.this.keysValues[i]))
{
objectIntProcedure.value(PrimitiveTuples.pair(IntIntHashMap.this.keysValues[i], IntIntHashMap.this.keysValues[i + 1]), index);
index++;
}
}
}
@Override
public <P> void forEachWith(Procedure2<? super IntIntPair, ? super P> procedure, P parameter)
{
if (IntIntHashMap.this.sentinelValues != null)
{
if (IntIntHashMap.this.sentinelValues.containsZeroKey)
{
procedure.value(PrimitiveTuples.pair(EMPTY_KEY, IntIntHashMap.this.sentinelValues.zeroValue), parameter);
}
if (IntIntHashMap.this.sentinelValues.containsOneKey)
{
procedure.value(PrimitiveTuples.pair(REMOVED_KEY, IntIntHashMap.this.sentinelValues.oneValue), parameter);
}
}
for (int i = 0; i < IntIntHashMap.this.keysValues.length; i += 2)
{
if (isNonSentinel(IntIntHashMap.this.keysValues[i]))
{
procedure.value(PrimitiveTuples.pair(IntIntHashMap.this.keysValues[i], IntIntHashMap.this.keysValues[i + 1]), parameter);
}
}
}
@Override
public Iterator<IntIntPair> iterator()
{
return new InternalKeyValuesIterator();
}
public class InternalKeyValuesIterator implements Iterator<IntIntPair>
{
private int count;
private int position;
private boolean handledZero;
private boolean handledOne;
@Override
public IntIntPair next()
{
if (!this.hasNext())
{
throw new NoSuchElementException("next() called, but the iterator is exhausted");
}
this.count++;
if (!this.handledZero)
{
this.handledZero = true;
if (IntIntHashMap.this.containsKey(EMPTY_KEY))
{
return PrimitiveTuples.pair(EMPTY_KEY, IntIntHashMap.this.sentinelValues.zeroValue);
}
}
if (!this.handledOne)
{
this.handledOne = true;
if (IntIntHashMap.this.containsKey(REMOVED_KEY))
{
return PrimitiveTuples.pair(REMOVED_KEY, IntIntHashMap.this.sentinelValues.oneValue);
}
}
int[] keys = IntIntHashMap.this.keysValues;
while (!isNonSentinel(keys[this.position]))
{
this.position += 2;
}
IntIntPair result = PrimitiveTuples.pair(keys[this.position], IntIntHashMap.this.keysValues[this.position + 1]);
this.position += 2;
return result;
}
@Override
public void remove()
{
throw new UnsupportedOperationException("Cannot call remove() on " + this.getClass().getSimpleName());
}
@Override
public boolean hasNext()
{
return this.count != IntIntHashMap.this.size();
}
}
}
}
IntIntHashMap
EMPTY_VALUE: int
getOccupiedWithData(): int
probe(int): int
https://github.com/eclipse/eclipse-collections/eclipse-collections: Eclipse Collections is a collections framework for Java. It has JDK-compatible List, Set and Map
implementations with a rich API and set of utility classes that work with any JDK compatible Collections,
Arrays, Maps or Strings. The iteration protocol was inspired by the Smalltalk collection framework.