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High Performance Primitive Collections Realtime
(fork of HPPC from Carrotsearch)
Fundamental data structures (maps, sets, lists, queues, heaps, sorts) generated for
combinations of object and primitive types to conserve JVM memory and speed
up execution. The Realtime fork intends to extend the existing collections, by tweaking to remove any dynamic allocations at runtime,
and to obtain low variance execution times whatever the input nature.
package com.carrotsearch.hppcrt.maps;
import com.carrotsearch.hppcrt.*;
import com.carrotsearch.hppcrt.cursors.*;
import com.carrotsearch.hppcrt.predicates.*;
import com.carrotsearch.hppcrt.procedures.*;
import com.carrotsearch.hppcrt.hash.*;
// If RH is defined, RobinHood Hashing is in effect :
/**
* A hash map of double to float, implemented using open
* addressing with linear probing for collision resolution.
*
*
* The internal buffers of this implementation ({@link #keys}, {@link #values}),
* are always allocated to the nearest size that is a power of two. When
* the capacity exceeds the given load factor, the buffer size is doubled.
*
*
* Important note. The implementation uses power-of-two tables and linear
* probing, which may cause poor performance (many collisions) if hash values are
* not properly distributed.
*
*
*
*
*
*/
@javax.annotation.Generated(
date = "2016-01-27T20:52:01+0100",
value = "KTypeVTypeHashMap.java")
public class DoubleFloatHashMap
implements DoubleFloatMap, Cloneable
{
protected float defaultValue = (0f);
/**
* Hash-indexed array holding all keys.
*
* Direct map iteration: iterate {keys[i], values[i]} for i in [0; keys.length[ where keys[i] != 0/null, then also
* {0/null, {@link #allocatedDefaultKeyValue} } is in the map if {@link #allocatedDefaultKey} = true.
*
*/
public double []
keys;
/**
* Hash-indexed array holding all values associated to the keys.
* stored in {@link #keys}.
*/
public float []
values;
/**
* True if key = 0/null is in the map.
*/
public boolean allocatedDefaultKey = false;
/**
* if allocatedDefaultKey = true, contains the associated V to the key = 0/null
*/
public float allocatedDefaultKeyValue;
/**
* Cached number of assigned slots in {@link #keys}.
*/
protected int assigned;
/**
* The load factor for this map (fraction of allocated slots
* before the buffers must be rehashed or reallocated).
*/
protected final double loadFactor;
/**
* Resize buffers when {@link #keys} hits this value.
*/
private int resizeAt;
/**
* Per-instance size perturbation
* introduced in rehashing to create a unique key distribution.
*/
private final int perturbation = Containers.randomSeed32();
/**
* Default constructor: Creates a hash map with the default capacity of {@link Containers#DEFAULT_EXPECTED_ELEMENTS},
* load factor of {@link HashContainers#DEFAULT_LOAD_FACTOR}.
*
* See class notes about hash distribution importance.
*/
public DoubleFloatHashMap() {
this(Containers.DEFAULT_EXPECTED_ELEMENTS);
}
/**
* Creates a hash map with the given initial capacity, default load factor of
* {@link HashContainers#DEFAULT_LOAD_FACTOR}.
*
* See class notes about hash distribution importance.
*
* @param initialCapacity Initial capacity (greater than zero and automatically
* rounded to the next power of two).
*/
public DoubleFloatHashMap(final int initialCapacity) {
this(initialCapacity, HashContainers.DEFAULT_LOAD_FACTOR);
}
/**
* Creates a hash map with the given initial capacity,
* load factor.
*
* @param loadFactor The load factor (greater than zero and smaller than 1).
*/
public DoubleFloatHashMap(final int initialCapacity, final double loadFactor) {
this.loadFactor = loadFactor;
//take into account of the load factor to guarantee no reallocations before reaching initialCapacity.
allocateBuffers(HashContainers.minBufferSize(initialCapacity, loadFactor));
}
/**
* Create a hash map from all key-value pairs of another container.
*/
public DoubleFloatHashMap(final DoubleFloatAssociativeContainer container) {
this(container.size());
putAll(container);
}
/**
* {@inheritDoc}
*/
@Override
public float put(double key, float value) {
if ((Double.doubleToLongBits((key)) == 0L)) {
if (this.allocatedDefaultKey) {
final float previousValue = this.allocatedDefaultKeyValue;
this.allocatedDefaultKeyValue = value;
return previousValue;
}
this.allocatedDefaultKeyValue = value;
this.allocatedDefaultKey = true;
return this.defaultValue;
}
final int mask = this.keys.length - 1;
final double[] keys = ((this.keys));
int slot = (BitMixer.mix((key) , this.perturbation)) & mask;
double existing;
while (!(Double.doubleToLongBits((existing = keys[slot])) == 0L)) {
if ( ((Double.doubleToLongBits(((key))) == Double.doubleToLongBits(((existing)))))) {
final float oldValue = ((this.values[slot]));
this.values[slot] = value;
return oldValue;
}
slot = (slot + 1) & mask;
} //end while
// Check if we need to grow. If so, reallocate new data, fill in the last element
// and rehash.
if (this.assigned == this.resizeAt) {
expandAndPut(key, value, slot);
} else {
this.assigned++;
keys[slot] = key;
values[slot] = value;
}
return this.defaultValue;
}
/**
* {@inheritDoc}
*/
@Override
public int putAll(final DoubleFloatAssociativeContainer container) {
return putAll((Iterable) container);
}
/**
* {@inheritDoc}
*/
@Override
public int putAll(final Iterable iterable) {
final int count = this.size();
for (final DoubleFloatCursor c : iterable) {
put(c.key, c.value);
}
return this.size() - count;
}
/**
* {@inheritDoc}
*/
@Override
public boolean putIfAbsent(final double key, final float value) {
if (!containsKey(key)) {
put(key, value);
return true;
}
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).
*/
@SuppressWarnings("cast")
@Override
public float putOrAdd(final double key, float putValue, final float incrementValue) {
if (containsKey(key)) {
putValue = get(key);
putValue = (float) (((putValue) + (incrementValue)));
}
put(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 float addTo(final double key, final float incrementValue)
{
return putOrAdd(key, incrementValue, incrementValue);
}
/**
* Expand the internal storage buffers (capacity) and rehash.
*/
private void expandAndPut(final double pendingKey, final float pendingValue, final int freeSlot) {
assert this.assigned == this.resizeAt;
//default sentinel value is never in the keys[] array, so never trigger reallocs
assert !(Double.doubleToLongBits((pendingKey)) == 0L);
// Try to allocate new buffers first. If we OOM, it'll be now without
// leaving the data structure in an inconsistent state.
final double[] oldKeys = ((this.keys));
final float[] oldValues = ((this.values));
allocateBuffers(HashContainers.nextBufferSize(this.keys.length, this.assigned, this.loadFactor));
// We have succeeded at allocating new data so insert the pending key/value at
// the free slot in the old arrays before rehashing.
this.assigned++;
oldKeys[freeSlot] = pendingKey;
oldValues[freeSlot] = pendingValue;
//for inserts
final int mask = this.keys.length - 1;
double key = (0.0);
float value = (0f);
int slot = -1;
final double[] keys = ((this.keys));
final float[] values = ((this.values));
//iterate all the old arrays to add in the newly allocated buffers
//It is important to iterate backwards to minimize the conflict chain length !
final int perturb = this.perturbation;
for (int i = oldKeys.length; --i >= 0;) {
//only consider non-empty slots, of course
if (!(Double.doubleToLongBits((key = oldKeys[i])) == 0L)) {
value = oldValues[i];
slot = (BitMixer.mix((key) , (perturb))) & mask;
//similar to put(), except all inserted keys are known to be unique.
while ((!(Double.doubleToLongBits(((keys)[(slot)])) == 0L))) {
slot = (slot + 1) & mask;
} //end while
keys[slot] = key;
values[slot] = value;
}
}
}
/**
* Allocate internal buffers for a given capacity.
*
* @param capacity New capacity (must be a power of two).
*/
@SuppressWarnings("boxing")
private void allocateBuffers(final int capacity) {
try {
final double[] keys = (new double[(capacity)]);
final float[] values = (new float[(capacity)]);
this.keys = keys;
this.values = values;
//allocate so that there is at least one slot that remains allocated = false
//this is compulsory to guarantee proper stop in searching loops
this.resizeAt = HashContainers.expandAtCount(capacity, this.loadFactor);
} catch (final OutOfMemoryError e) {
throw new BufferAllocationException(
"Not enough memory to allocate buffers to grow from %d -> %d elements",
e,
(this.keys == null) ? 0 : this.keys.length,
capacity);
}
}
/**
* {@inheritDoc}
*/
@Override
public float remove(final double key) {
if ((Double.doubleToLongBits((key)) == 0L)) {
if (this.allocatedDefaultKey) {
final float previousValue = this.allocatedDefaultKeyValue;
this.allocatedDefaultKey = false;
return previousValue;
}
return this.defaultValue;
}
final int mask = this.keys.length - 1;
final double[] keys = ((this.keys));
int slot = (BitMixer.mix((key) , this.perturbation)) & mask;
double existing;
while (!(Double.doubleToLongBits((existing = keys[slot])) == 0L)
) {
if (((Double.doubleToLongBits(((key))) == Double.doubleToLongBits(((existing)))))) {
final float value = ((this.values[slot]));
shiftConflictingKeys(slot);
return value;
}
slot = (slot + 1) & mask;
} //end while true
return this.defaultValue;
}
/**
* Shift all the slot-conflicting keys allocated to (and including) slot.
*/
private void shiftConflictingKeys(int gapSlot) {
final int mask = this.keys.length - 1;
final double[] keys = ((this.keys));
final float[] values = ((this.values));
final int perturb = this.perturbation;
// Perform shifts of conflicting keys to fill in the gap.
int distance = 0;
while (true) {
final int slot = (gapSlot + (++distance)) & mask;
final double existing = keys[slot];
final float existingValue = values[slot];
if ((Double.doubleToLongBits((existing)) == 0L)) {
break;
}
final int idealSlotModMask = (BitMixer.mix((existing) , (perturb))) & mask;
//original HPPC code: shift = (slot - idealSlot) & mask;
//equivalent to shift = (slot & mask - idealSlot & mask) & mask;
//since slot and idealSlotModMask are already folded, we have :
final int shift = (slot - idealSlotModMask) & 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] = existingValue;
gapSlot = slot;
distance = 0;
}
} //end while
// Mark the last found gap slot without a conflict as empty.
keys[gapSlot] = (0.0);
/* */
this.assigned--;
}
/**
* {@inheritDoc}
*/
@SuppressWarnings("unchecked")
@Override
public int removeAll(final DoubleContainer other) {
final int before = this.size();
//1) other is a DoubleLookupContainer, so with fast lookup guarantees
//and is bigger than this, so take advantage of both and iterate over this
//and test other elements by their contains().
if (other.size() >= before && other instanceof DoubleLookupContainer) {
if (this.allocatedDefaultKey) {
if (other.contains((0.0))) {
this.allocatedDefaultKey = false;
}
}
final double[] keys = ((this.keys));
for (int i = 0; i < keys.length;) {
double existing;
if (!(Double.doubleToLongBits((existing = keys[i])) == 0L) && other.contains(existing)) {
shiftConflictingKeys(i);
// Shift, do not increment slot.
} else {
i++;
}
}
} else {
//2) Do not use contains() from container, which may lead to O(n**2) execution times,
//so it iterate linearly and call remove() from map which is O(1).
for (final DoubleCursor c : other) {
remove(((c.value)));
}
}
return before - this.size();
}
/**
* {@inheritDoc}
*/
@Override
public int removeAll(final DoublePredicate predicate) {
final int before = this.size();
if (this.allocatedDefaultKey) {
if (predicate.apply((0.0))) {
this.allocatedDefaultKey = false;
}
}
final double[] keys = ((this.keys));
for (int i = 0; i < keys.length;) {
double existing;
if (!(Double.doubleToLongBits((existing = keys[i])) == 0L) && predicate.apply(existing)) {
shiftConflictingKeys(i);
// Shift, do not increment slot.
} else {
i++;
}
}
return before - this.size();
}
/**
* {@inheritDoc}
*/
@Override
public int removeAll(final DoubleFloatPredicate predicate) {
final int before = this.size();
if (this.allocatedDefaultKey) {
if (predicate.apply((0.0), this.allocatedDefaultKeyValue)) {
this.allocatedDefaultKey = false;
}
}
final double[] keys = ((this.keys));
final float[] values = ((this.values));
for (int i = 0; i < keys.length;) {
double existing;
if (!(Double.doubleToLongBits((existing = keys[i])) == 0L) && predicate.apply(existing, values[i])) {
shiftConflictingKeys(i);
// Shift, do not increment slot.
} else {
i++;
}
}
return before - this.size();
}
/**
* {@inheritDoc}
*/
@Override
public float get(final double key) {
if ((Double.doubleToLongBits((key)) == 0L)) {
if (this.allocatedDefaultKey) {
return this.allocatedDefaultKeyValue;
}
return this.defaultValue;
}
final int mask = this.keys.length - 1;
final double[] keys = ((this.keys));
int slot = (BitMixer.mix((key) , this.perturbation)) & mask;
double existing;
while (!(Double.doubleToLongBits((existing = keys[slot])) == 0L)
) {
if (((Double.doubleToLongBits(((key))) == Double.doubleToLongBits(((existing)))))) {
return ((this.values[slot]));
}
slot = (slot + 1) & mask;
} //end while true
return this.defaultValue;
}
/**
* {@inheritDoc}
*/
@Override
public boolean containsKey(final double key) {
if ((Double.doubleToLongBits((key)) == 0L)) {
return this.allocatedDefaultKey;
}
final int mask = this.keys.length - 1;
final double[] keys = ((this.keys));
int slot = (BitMixer.mix((key) , this.perturbation)) & mask;
double existing;
while (!(Double.doubleToLongBits((existing = keys[slot])) == 0L)
) {
if (((Double.doubleToLongBits(((key))) == Double.doubleToLongBits(((existing)))))) {
return true;
}
slot = (slot + 1) & mask;
} //end while true
return false;
}
/**
* {@inheritDoc}
*/
@Override
public void clear() {
this.assigned = 0;
// States are always cleared.
this.allocatedDefaultKey = false;
//Faster than Arrays.fill(keys, null); // Help the GC.
DoubleArrays.blankArray(this.keys, 0, this.keys.length);
}
/**
* {@inheritDoc}
*/
@Override
public int size() {
return this.assigned + (this.allocatedDefaultKey ? 1 : 0);
}
/**
* {@inheritDoc}
*/
@Override
public int capacity() {
return this.resizeAt;
}
/**
* {@inheritDoc}
*
* Note that an empty container may still contain many deleted keys (that occupy buffer
* space). Adding even a single element to such a container may cause rehashing.
*/
@Override
public boolean isEmpty() {
return size() == 0;
}
/**
* {@inheritDoc}
*/
@Override
public int hashCode() {
int h = 0;
if (this.allocatedDefaultKey) {
h += BitMixer.mix(this.allocatedDefaultKeyValue);
}
final double[] keys = ((this.keys));
final float[] values = ((this.values));
for (int i = keys.length; --i >= 0;) {
double existing;
if (!(Double.doubleToLongBits((existing = keys[i])) == 0L)) {
h += BitMixer.mix(existing) ^ BitMixer.mix(values[i]);
}
}
return h;
}
/**
* {@inheritDoc}
*/
@Override
public boolean equals(final Object obj) {
if (obj != null) {
if (obj == this) {
return true;
}
//must be of the same class, subclasses are not comparable
if (obj.getClass() != this.getClass()) {
return false;
}
/* */
DoubleFloatHashMap other = (DoubleFloatHashMap) obj;
//must be of the same size
if (other.size() != this.size()) {
return false;
}
final EntryIterator it = this.iterator();
while (it.hasNext()) {
final DoubleFloatCursor c = it.next();
if (!other.containsKey(c.key)) {
//recycle
it.release();
return false;
}
final float otherValue = other.get(c.key);
if (!(Float.floatToIntBits((c.value)) == Float.floatToIntBits((otherValue)))) {
//recycle
it.release();
return false;
}
} //end while
return true;
}
return false;
}
/**
* An iterator implementation for {@link #iterator}.
* Holds a DoubleFloatCursor returning
* (key, value, index) = (double key, float value, index the position in keys {@link DoubleFloatHashMap#keys}, or keys.length for key = 0/null)
*/
public final class EntryIterator extends AbstractIterator
{
public final DoubleFloatCursor cursor;
public EntryIterator() {
this.cursor = new DoubleFloatCursor();
this.cursor.index = -2;
}
/**
* Iterate backwards w.r.t the buffer, to
* minimize collision chains when filling another hash container (ex. with putAll())
*/
@Override
protected DoubleFloatCursor fetch() {
if (this.cursor.index == DoubleFloatHashMap.this.keys.length + 1) {
if (DoubleFloatHashMap.this.allocatedDefaultKey) {
this.cursor.index = DoubleFloatHashMap.this.keys.length;
this.cursor.key = (0.0);
this.cursor.value = DoubleFloatHashMap.this.allocatedDefaultKeyValue;
return this.cursor;
}
//no value associated with the default key, continue iteration...
this.cursor.index = DoubleFloatHashMap.this.keys.length;
}
int i = this.cursor.index - 1;
while (i >= 0 && !(!(Double.doubleToLongBits(((((DoubleFloatHashMap.this.keys)))[(i)])) == 0L))) {
i--;
}
if (i == -1) {
return done();
}
this.cursor.index = i;
this.cursor.key = ((DoubleFloatHashMap.this.keys[i]));
this.cursor.value = ((DoubleFloatHashMap.this.values[i]));
return this.cursor;
}
}
/**
* internal pool of EntryIterator
*/
protected final IteratorPool entryIteratorPool = new IteratorPool(
new ObjectFactory() {
@Override
public EntryIterator create() {
return new EntryIterator();
}
@Override
public void initialize(final EntryIterator obj) {
obj.cursor.index = DoubleFloatHashMap.this.keys.length + 1;
}
@Override
public void reset(final EntryIterator obj) {
}
});
/**
* {@inheritDoc}
*/
@Override
public EntryIterator iterator() {
//return new EntryIterator();
return this.entryIteratorPool.borrow();
}
/**
* {@inheritDoc}
*/
@Override
public T forEach(final T procedure) {
if (this.allocatedDefaultKey) {
procedure.apply((0.0), this.allocatedDefaultKeyValue);
}
final double[] keys = ((this.keys));
final float[] values = ((this.values));
//Iterate in reverse for side-stepping the longest conflict chain
//in another hash, in case apply() is actually used to fill another hash container.
for (int i = keys.length - 1; i >= 0; i--) {
double existing;
if (!(Double.doubleToLongBits((existing = keys[i])) == 0L)) {
procedure.apply(existing, values[i]);
}
}
return procedure;
}
/**
* {@inheritDoc}
*/
@Override
public T forEach(final T predicate) {
if (this.allocatedDefaultKey) {
if (!predicate.apply((0.0), this.allocatedDefaultKeyValue)) {
return predicate;
}
}
final double[] keys = ((this.keys));
final float[] values = ((this.values));
//Iterate in reverse for side-stepping the longest conflict chain
//in another hash, in case apply() is actually used to fill another hash container.
for (int i = keys.length - 1; i >= 0; i--) {
double existing;
if (!(Double.doubleToLongBits((existing = keys[i])) == 0L)) {
if (!predicate.apply(existing, values[i])) {
break;
}
}
} //end for
return predicate;
}
/**
* {@inheritDoc}
* @return a new KeysCollection view of the keys of this map.
*/
@Override
public KeysCollection keys() {
return new KeysCollection();
}
/**
* A view of the keys inside this map.
*/
public final class KeysCollection extends AbstractDoubleCollection implements DoubleLookupContainer
{
private final DoubleFloatHashMap owner = DoubleFloatHashMap.this;
@Override
public boolean contains(final double e) {
return containsKey(e);
}
@Override
public T forEach(final T procedure) {
if (this.owner.allocatedDefaultKey) {
procedure.apply((0.0));
}
final double[] keys = ((this.owner.keys));
//Iterate in reverse for side-stepping the longest conflict chain
//in another hash, in case apply() is actually used to fill another hash container.
for (int i = keys.length - 1; i >= 0; i--) {
double existing;
if (!(Double.doubleToLongBits((existing = keys[i])) == 0L)) {
procedure.apply(existing);
}
}
return procedure;
}
@Override
public T forEach(final T predicate) {
if (this.owner.allocatedDefaultKey) {
if (!predicate.apply((0.0))) {
return predicate;
}
}
final double[] keys = ((this.owner.keys));
//Iterate in reverse for side-stepping the longest conflict chain
//in another hash, in case apply() is actually used to fill another hash container.
for (int i = keys.length - 1; i >= 0; i--) {
double existing;
if (!(Double.doubleToLongBits((existing = keys[i])) == 0L)) {
if (!predicate.apply(existing)) {
break;
}
}
}
return predicate;
}
/**
* {@inheritDoc}
*/
@Override
public KeysIterator iterator() {
//return new KeysIterator();
return this.keyIteratorPool.borrow();
}
/**
* {@inheritDoc}
*/
@Override
public int size() {
return this.owner.size();
}
/**
* {@inheritDoc}
*/
@Override
public int capacity() {
return this.owner.capacity();
}
@Override
public void clear() {
this.owner.clear();
}
@Override
public int removeAll(final DoublePredicate predicate) {
return this.owner.removeAll(predicate);
}
@Override
public int removeAll(final double e) {
final boolean hasKey = this.owner.containsKey(e);
int result = 0;
if (hasKey) {
this.owner.remove(e);
result = 1;
}
return result;
}
/**
* internal pool of KeysIterator
*/
protected final IteratorPool keyIteratorPool = new IteratorPool(
new ObjectFactory() {
@Override
public KeysIterator create() {
return new KeysIterator();
}
@Override
public void initialize(final KeysIterator obj) {
obj.cursor.index = DoubleFloatHashMap.this.keys.length + 1;
}
@Override
public void reset(final KeysIterator obj) {
}
});
@Override
public double[] toArray(final double[] target) {
int count = 0;
if (this.owner.allocatedDefaultKey) {
target[count++] = (0.0);
}
final double[] keys = ((this.owner.keys));
for (int i = 0; i < keys.length; i++) {
double existing;
if (!(Double.doubleToLongBits((existing = keys[i])) == 0L)) {
target[count++] = existing;
}
}
assert count == this.owner.size();
return target;
}
};
/**
* An iterator over the set of keys.
* Holds a DoubleCursor returning (value, index) = (double key, index the position in buffer {@link DoubleFloatHashMap#keys}, or keys.length for key = 0/null.)
*/
public final class KeysIterator extends AbstractIterator
{
public final DoubleCursor cursor;
public KeysIterator() {
this.cursor = new DoubleCursor();
this.cursor.index = -2;
}
/**
* Iterate backwards w.r.t the buffer, to
* minimize collision chains when filling another hash container (ex. with putAll())
*/
@Override
protected DoubleCursor fetch() {
if (this.cursor.index == DoubleFloatHashMap.this.keys.length + 1) {
if (DoubleFloatHashMap.this.allocatedDefaultKey) {
this.cursor.index = DoubleFloatHashMap.this.keys.length;
this.cursor.value = (0.0);
return this.cursor;
}
//no value associated with the default key, continue iteration...
this.cursor.index = DoubleFloatHashMap.this.keys.length;
}
int i = this.cursor.index - 1;
while (i >= 0 && !(!(Double.doubleToLongBits(((((DoubleFloatHashMap.this.keys)))[(i)])) == 0L))) {
i--;
}
if (i == -1) {
return done();
}
this.cursor.index = i;
this.cursor.value = ((DoubleFloatHashMap.this.keys[i]));
return this.cursor;
}
}
/**
* {@inheritDoc}
* @return a new ValuesCollection view of the values of this map.
*/
@Override
public ValuesCollection values() {
return new ValuesCollection();
}
/**
* A view over the set of values of this map.
*/
public final class ValuesCollection extends AbstractFloatCollection
{
private final DoubleFloatHashMap owner = DoubleFloatHashMap.this;
/**
* {@inheritDoc}
*/
@Override
public int size() {
return this.owner.size();
}
/**
* {@inheritDoc}
*/
@Override
public int capacity() {
return this.owner.capacity();
}
@Override
public boolean contains(final float value) {
if (this.owner.allocatedDefaultKey && (Float.floatToIntBits((value)) == Float.floatToIntBits((this.owner.allocatedDefaultKeyValue)))) {
return true;
}
// This is a linear scan over the values, but it's in the contract, so be it.
final double[] keys = ((this.owner.keys));
final float[] values = ((this.owner.values));
for (int slot = 0; slot < keys.length; slot++) {
if ((!(Double.doubleToLongBits(((keys)[(slot)])) == 0L)) && (Float.floatToIntBits((value)) == Float.floatToIntBits((values[slot])))) {
return true;
}
}
return false;
}
@Override
public T forEach(final T procedure) {
if (this.owner.allocatedDefaultKey) {
procedure.apply(this.owner.allocatedDefaultKeyValue);
}
final double[] keys = ((this.owner.keys));
final float[] values = ((this.owner.values));
for (int slot = 0; slot < keys.length; slot++) {
if ((!(Double.doubleToLongBits(((keys)[(slot)])) == 0L))) {
procedure.apply(values[slot]);
}
}
return procedure;
}
@Override
public T forEach(final T predicate) {
if (this.owner.allocatedDefaultKey) {
if (!predicate.apply(this.owner.allocatedDefaultKeyValue)) {
return predicate;
}
}
final double[] keys = ((this.owner.keys));
final float[] values = ((this.owner.values));
for (int slot = 0; slot < keys.length; slot++) {
if ((!(Double.doubleToLongBits(((keys)[(slot)])) == 0L))) {
if (!predicate.apply(values[slot])) {
break;
}
}
}
return predicate;
}
@Override
public ValuesIterator iterator() {
// return new ValuesIterator();
return this.valuesIteratorPool.borrow();
}
/**
* {@inheritDoc}
* Indeed removes all the (key,value) pairs matching
* (key ? , e) with the same e, from the map.
*/
@Override
public int removeAll(final float e) {
final int before = this.owner.size();
if (this.owner.allocatedDefaultKey) {
if ((Float.floatToIntBits((e)) == Float.floatToIntBits((this.owner.allocatedDefaultKeyValue)))) {
this.owner.allocatedDefaultKey = false;
}
}
final double[] keys = ((this.owner.keys));
final float[] values = ((this.owner.values));
for (int slot = 0; slot < keys.length;) {
if ((!(Double.doubleToLongBits(((keys)[(slot)])) == 0L)) && (Float.floatToIntBits((e)) == Float.floatToIntBits((values[slot])))) {
shiftConflictingKeys(slot);
// Shift, do not increment slot.
} else {
slot++;
}
}
return before - this.owner.size();
}
/**
* {@inheritDoc}
* Indeed removes all the (key,value) pairs matching
* the predicate for the values, from the map.
*/
@Override
public int removeAll(final FloatPredicate predicate) {
final int before = this.owner.size();
if (this.owner.allocatedDefaultKey) {
if (predicate.apply(this.owner.allocatedDefaultKeyValue)) {
this.owner.allocatedDefaultKey = false;
}
}
final double[] keys = ((this.owner.keys));
final float[] values = ((this.owner.values));
for (int slot = 0; slot < keys.length;) {
if ((!(Double.doubleToLongBits(((keys)[(slot)])) == 0L)) && predicate.apply(values[slot])) {
shiftConflictingKeys(slot);
// Shift, do not increment slot.
} else {
slot++;
}
}
return before - this.owner.size();
}
/**
* {@inheritDoc}
* Alias for clear() the whole map.
*/
@Override
public void clear() {
this.owner.clear();
}
/**
* internal pool of ValuesIterator
*/
protected final IteratorPool valuesIteratorPool = new IteratorPool(
new ObjectFactory() {
@Override
public ValuesIterator create() {
return new ValuesIterator();
}
@Override
public void initialize(final ValuesIterator obj) {
obj.cursor.index = DoubleFloatHashMap.this.keys.length + 1;
}
@Override
public void reset(final ValuesIterator obj) {
}
});
@Override
public float[] toArray(final float[] target) {
int count = 0;
if (this.owner.allocatedDefaultKey) {
target[count++] = this.owner.allocatedDefaultKeyValue;
}
final double[] keys = ((this.owner.keys));
final float[] values = ((this.owner.values));
for (int i = 0; i < values.length; i++) {
if ((!(Double.doubleToLongBits(((keys)[(i)])) == 0L))) {
target[count++] = values[i];
}
}
assert count == this.owner.size();
return target;
}
}
/**
* An iterator over the set of values.
* Holds a DoubleCursor returning (value, index) = (float value, index the position in buffer {@link DoubleFloatHashMap#values},
* or values.length for value = {@link DoubleFloatHashMap#allocatedDefaultKeyValue}).
*/
public final class ValuesIterator extends AbstractIterator
{
public final FloatCursor cursor;
public ValuesIterator() {
this.cursor = new FloatCursor();
this.cursor.index = -2;
}
/**
* Iterate backwards w.r.t the buffer, to
* minimize collision chains when filling another hash container (ex. with putAll())
*/
@Override
protected FloatCursor fetch() {
if (this.cursor.index == DoubleFloatHashMap.this.values.length + 1) {
if (DoubleFloatHashMap.this.allocatedDefaultKey) {
this.cursor.index = DoubleFloatHashMap.this.values.length;
this.cursor.value = DoubleFloatHashMap.this.allocatedDefaultKeyValue;
return this.cursor;
}
//no value associated with the default key, continue iteration...
this.cursor.index = DoubleFloatHashMap.this.keys.length;
}
int i = this.cursor.index - 1;
while (i >= 0 && !(!(Double.doubleToLongBits(((((DoubleFloatHashMap.this.keys)))[(i)])) == 0L))) {
i--;
}
if (i == -1) {
return done();
}
this.cursor.index = i;
this.cursor.value = ((DoubleFloatHashMap.this.values[i]));
return this.cursor;
}
}
/**
* {@inheritDoc}
*/
@Override
public DoubleFloatHashMap clone() {
//clone to size() to prevent some cases of exponential sizes,
final DoubleFloatHashMap cloned = new DoubleFloatHashMap(this.size(), this.loadFactor);
//We must NOT clone because of independent perturbations seeds
cloned.putAll(this);
return cloned;
}
/**
* 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 (final DoubleFloatCursor cursor : this) {
if (!first) {
buffer.append(", ");
}
buffer.append(cursor.key);
buffer.append("=>");
buffer.append(cursor.value);
first = false;
}
buffer.append("]");
return buffer.toString();
}
/**
* Creates a hash map from two index-aligned arrays of key-value pairs. Default load factor is used.
*/
public static DoubleFloatHashMap from(final double[] keys, final float[] values) {
if (keys.length != values.length) {
throw new IllegalArgumentException("Arrays of keys and values must have an identical length.");
}
final DoubleFloatHashMap map = new DoubleFloatHashMap(keys.length);
for (int i = 0; i < keys.length; i++) {
map.put(keys[i], values[i]);
}
return map;
}
/**
* Create a hash map from another associative container. (constructor shortcut) Default load factor is used.
*/
public static DoubleFloatHashMap from(
final DoubleFloatAssociativeContainer container) {
return new DoubleFloatHashMap(container);
}
/**
* Create a new hash map without providing the full generic signature
* (constructor shortcut).
*/
public static DoubleFloatHashMap newInstance() {
return new DoubleFloatHashMap();
}
/**
* Create a new hash map with initial capacity and load factor control.
* (constructor shortcut).
*/
public static DoubleFloatHashMap newInstance(final int initialCapacity,
final double loadFactor) {
return new DoubleFloatHashMap(initialCapacity, loadFactor);
}
/**
* Returns the "default value" value used in containers methods returning
* "default value"
*/
@Override
public float getDefaultValue() {
return this.defaultValue;
}
/**
* Set the "default value" value to be used in containers methods returning
* "default value"
*/
@Override
public void setDefaultValue(final float defaultValue) {
this.defaultValue = defaultValue;
}
//Test for existence in template
}