bak.pcj.set
Class LongOpenHashSet

java.lang.Object
  bak.pcj.AbstractLongCollection
      bak.pcj.set.AbstractLongSet
          bak.pcj.set.LongOpenHashSet

All Implemented Interfaces:

Cloneable, LongCollection, LongSet, Serializable

public class LongOpenHashSet

extends AbstractLongSet

implements LongSet, Cloneable, Serializable

This class represents open addressing hash table based sets of long values. Unlike the Java Collections HashSet instances of this class are not backed up by a map. It is implemented using a simple open addressing hash table where the keys are stored directly as entries.

Since:

1.0

See Also:

LongOpenHashSet, HashSet, Serialized Form

Field Summary

static int	DEFAULT_CAPACITY The default capacity of this set.
static int	DEFAULT_GROWTH_CHUNK The default chunk size with which to increase the capacity of this set.
static double	DEFAULT_GROWTH_FACTOR The default factor with which to increase the capacity of this set.
static double	DEFAULT_LOAD_FACTOR The default load factor of this set.

Constructor Summary

LongOpenHashSet()
Creates a new hash set with capacity 11, a relative growth factor of 1.0, and a load factor of 75%.

LongOpenHashSet(double loadFactor)
Creates a new hash set with a capacity of 11, a relative growth factor of 1.0, and a specified load factor.

LongOpenHashSet(int capacity)
Creates a new hash set with a specified capacity, a relative growth factor of 1.0, and a load factor of 75%.

LongOpenHashSet(int capacity, double loadFactor)
Creates a new hash set with a specified capacity and load factor, and a relative growth factor of 1.0.

LongOpenHashSet(int capacity, double loadFactor, double growthFactor)
Creates a new hash set with a specified capacity, load factor, and relative growth factor.

LongOpenHashSet(int capacity, double loadFactor, int growthChunk)
Creates a new hash set with a specified capacity, load factor, and absolute growth factor.

LongOpenHashSet(long[] a)
Creates a new hash set with the same elements as the specified array.

LongOpenHashSet(LongCollection c)
Creates a new hash set with the same elements as a specified collection.

LongOpenHashSet(LongHashFunction keyhash)
Creates a new hash set with capacity 11, a relative growth factor of 1.0, and a load factor of 75%.

LongOpenHashSet(LongHashFunction keyhash, double loadFactor)
Creates a new hash set with a capacity of 11, a relative growth factor of 1.0, and a specified load factor.

LongOpenHashSet(LongHashFunction keyhash, int capacity)
Creates a new hash set with a specified capacity, a relative growth factor of 1.0, and a load factor of 75%.

LongOpenHashSet(LongHashFunction keyhash, int capacity, double loadFactor)
Creates a new hash set with a specified capacity and load factor, and a relative growth factor of 1.0.

LongOpenHashSet(LongHashFunction keyhash, int capacity, double loadFactor, double growthFactor)
Creates a new hash set with a specified capacity, load factor, and relative growth factor.

LongOpenHashSet(LongHashFunction keyhash, int capacity, double loadFactor, int growthChunk)
Creates a new hash set with a specified capacity, load factor, and absolute growth factor.

Method Summary

boolean	add(long v) Adds an element to this collection.
void	clear() Clears this collection.
Object	clone() Returns a clone of this hash set.
boolean	contains(long v) Indicates whether this collection contains a specified element.
int	hashCode() Returns a hash code value for this collection.
LongIterator	iterator() Returns an iterator over this collection.
boolean	remove(long v) Removes a specified element from this collection.
int	size() Returns the number of elements in this collection.
long[]	toArray(long[] a) Returns the elements of this collection as an array.
void	trimToSize() Minimizes the memory used by this collection.

Methods inherited from class bak.pcj.set.AbstractLongSet

equals

Methods inherited from class bak.pcj.AbstractLongCollection

addAll, containsAll, isEmpty, removeAll, retainAll, toArray, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface bak.pcj.LongCollection

addAll, containsAll, equals, isEmpty, removeAll, retainAll, toArray

Field Detail

DEFAULT_GROWTH_FACTOR

public static final double DEFAULT_GROWTH_FACTOR

The default factor with which to increase the capacity of this set.

See Also:

Constant Field Values

DEFAULT_GROWTH_CHUNK

public static final int DEFAULT_GROWTH_CHUNK

The default chunk size with which to increase the capacity of this set.

See Also:

Constant Field Values

DEFAULT_CAPACITY

public static final int DEFAULT_CAPACITY

The default capacity of this set.

See Also:

Constant Field Values

DEFAULT_LOAD_FACTOR

public static final double DEFAULT_LOAD_FACTOR

The default load factor of this set.

See Also:

Constant Field Values

Constructor Detail

LongOpenHashSet

public LongOpenHashSet()

Creates a new hash set with capacity 11, a relative growth factor of 1.0, and a load factor of 75%.

LongOpenHashSet

public LongOpenHashSet(LongCollection c)

Creates a new hash set with the same elements as a specified collection.

Parameters:

c - the collection whose elements to add to the new set.

Throws:

NullPointerException - if c is null.

LongOpenHashSet

public LongOpenHashSet(long[] a)

Creates a new hash set with the same elements as the specified array.

Parameters:

a - the array whose elements to add to the new set.

Throws:

NullPointerException - if a is null.

Since:

1.1

LongOpenHashSet

public LongOpenHashSet(int capacity)

Creates a new hash set with a specified capacity, a relative growth factor of 1.0, and a load factor of 75%.

Parameters:

capacity - the initial capacity of the set.

Throws:

IllegalArgumentException - if capacity is negative.

LongOpenHashSet

public LongOpenHashSet(double loadFactor)

Creates a new hash set with a capacity of 11, a relative growth factor of 1.0, and a specified load factor.

Parameters:

loadFactor - the load factor of the set.

Throws:

IllegalArgumentException - if loadFactor is negative or zero.

LongOpenHashSet

public LongOpenHashSet(int capacity,
                       double loadFactor)

Creates a new hash set with a specified capacity and load factor, and a relative growth factor of 1.0.

Parameters:

capacity - the initial capacity of the set.

loadFactor - the load factor of the set.

Throws:

IllegalArgumentException - if capacity is negative; if loadFactor is not positive.

LongOpenHashSet

public LongOpenHashSet(int capacity,
                       double loadFactor,
                       double growthFactor)

Creates a new hash set with a specified capacity, load factor, and relative growth factor.

The set capacity increases to capacity()*(1+growthFactor). This strategy is good for avoiding many capacity increases, but the amount of wasted memory is approximately the size of the set.

Parameters:

capacity - the initial capacity of the set.

loadFactor - the load factor of the set.

growthFactor - the relative amount with which to increase the the capacity when a capacity increase is needed.

Throws:

IllegalArgumentException - if capacity is negative; if loadFactor is not positive; if growthFactor is not positive.

LongOpenHashSet

public LongOpenHashSet(int capacity,
                       double loadFactor,
                       int growthChunk)

Creates a new hash set with a specified capacity, load factor, and absolute growth factor.

The set capacity increases to capacity()+growthChunk. This strategy is good for avoiding wasting memory. However, an overhead is potentially introduced by frequent capacity increases.

Parameters:

capacity - the initial capacity of the set.

loadFactor - the load factor of the set.

growthChunk - the absolute amount with which to increase the the capacity when a capacity increase is needed.

Throws:

IllegalArgumentException - if capacity is negative; if loadFactor is not positive; if growthChunk is not positive.

LongOpenHashSet

public LongOpenHashSet(LongHashFunction keyhash)

Creates a new hash set with capacity 11, a relative growth factor of 1.0, and a load factor of 75%.

Parameters:

keyhash - the hash function to use when hashing keys.

Throws:

NullPointerException - if keyhash is null.

LongOpenHashSet

public LongOpenHashSet(LongHashFunction keyhash,
                       int capacity)

Creates a new hash set with a specified capacity, a relative growth factor of 1.0, and a load factor of 75%.

Parameters:

keyhash - the hash function to use when hashing keys.

capacity - the initial capacity of the set.

Throws:

IllegalArgumentException - if capacity is negative.

NullPointerException - if keyhash is null.

LongOpenHashSet

public LongOpenHashSet(LongHashFunction keyhash,
                       double loadFactor)

Creates a new hash set with a capacity of 11, a relative growth factor of 1.0, and a specified load factor.

Parameters:

keyhash - the hash function to use when hashing keys.

loadFactor - the load factor of the set.

Throws:

IllegalArgumentException - if loadFactor is negative or zero.

NullPointerException - if keyhash is null.

LongOpenHashSet

public LongOpenHashSet(LongHashFunction keyhash,
                       int capacity,
                       double loadFactor)

Creates a new hash set with a specified capacity and load factor, and a relative growth factor of 1.0.

Parameters:

keyhash - the hash function to use when hashing keys.

capacity - the initial capacity of the set.

loadFactor - the load factor of the set.

Throws:

IllegalArgumentException - if capacity is negative; if loadFactor is not positive.

NullPointerException - if keyhash is null.

LongOpenHashSet

public LongOpenHashSet(LongHashFunction keyhash,
                       int capacity,
                       double loadFactor,
                       double growthFactor)

Creates a new hash set with a specified capacity, load factor, and relative growth factor.

The set capacity increases to capacity()*(1+growthFactor). This strategy is good for avoiding many capacity increases, but the amount of wasted memory is approximately the size of the set.

Parameters:

keyhash - the hash function to use when hashing keys.

capacity - the initial capacity of the set.

loadFactor - the load factor of the set.

growthFactor - the relative amount with which to increase the the capacity when a capacity increase is needed.

Throws:

IllegalArgumentException - if capacity is negative; if loadFactor is not positive; if growthFactor is not positive.

NullPointerException - if keyhash is null.

LongOpenHashSet

public LongOpenHashSet(LongHashFunction keyhash,
                       int capacity,
                       double loadFactor,
                       int growthChunk)

Creates a new hash set with a specified capacity, load factor, and absolute growth factor.

Parameters:

keyhash - the hash function to use when hashing keys.

The set capacity increases to capacity()+growthChunk. This strategy is good for avoiding wasting memory. However, an overhead is potentially introduced by frequent capacity increases.

capacity - the initial capacity of the set.

loadFactor - the load factor of the set.

growthChunk - the absolute amount with which to increase the the capacity when a capacity increase is needed.

Throws:

IllegalArgumentException - if capacity is negative; if loadFactor is not positive; if growthChunk is not positive.

NullPointerException - if keyhash is null.

Method Detail

add

public boolean add(long v)

Description copied from interface: LongCollection

Adds an element to this collection.

Specified by:

add in interface LongCollection

Overrides:

add in class AbstractLongCollection

iterator

public LongIterator iterator()

Description copied from interface: LongCollection

Returns an iterator over this collection.

Specified by:

iterator in interface LongCollection

Returns:

an iterator over this collection.

trimToSize

public void trimToSize()

Description copied from interface: LongCollection

Minimizes the memory used by this collection. The exact operation of this method depends on the class implementing it. Implementors may choose to ignore it completely.

Specified by:

trimToSize in interface LongCollection

Overrides:

trimToSize in class AbstractLongCollection

clone

public Object clone()

Returns a clone of this hash set.

Returns:

a clone of this hash set.

Since:

1.1

size

public int size()

Description copied from interface: LongCollection

Returns the number of elements in this collection.

Specified by:

size in interface LongCollection

Overrides:

size in class AbstractLongCollection

clear

public void clear()

Description copied from interface: LongCollection

Clears this collection.

Specified by:

clear in interface LongCollection

Overrides:

clear in class AbstractLongCollection

contains

public boolean contains(long v)

Description copied from interface: LongCollection

Indicates whether this collection contains a specified element.

Specified by:

contains in interface LongCollection

Overrides:

contains in class AbstractLongCollection

hashCode

public int hashCode()

Description copied from interface: LongCollection

Returns a hash code value for this collection.

Specified by:

hashCode in interface LongCollection

Overrides:

hashCode in class AbstractLongSet

remove

public boolean remove(long v)

Description copied from interface: LongCollection

Removes a specified element from this collection.

Specified by:

remove in interface LongCollection

Overrides:

remove in class AbstractLongCollection

toArray

public long[] toArray(long[] a)

Description copied from interface: LongCollection

Returns the elements of this collection as an array.

Specified by:

toArray in interface LongCollection

Overrides:

toArray in class AbstractLongCollection