org.roaringbitmap

Class ArrayContainer

java.lang.Object

org.roaringbitmap.Container

org.roaringbitmap.ArrayContainer

All Implemented Interfaces:

Externalizable, Serializable, Cloneable, Iterable<Short>

public final class ArrayContainer
extends Container
implements Cloneable, Serializable

Simple container made of an array of 16-bit integers

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected int	cardinality

Constructor Summary

Constructors

Modifier	Constructor and Description
	ArrayContainer() Create an array container with default capacity
	ArrayContainer(int capacity) Create an array container with specified capacity
	ArrayContainer(int firstOfRun, int lastOfRun) Create an array container with a run of ones from firstOfRun to lastOfRun, inclusive.
protected	ArrayContainer(short[] newContent)

Method Summary

Modifier and Type	Method and Description
Container	add(short x) running time is in O(n) time if insert is not in order.
ArrayContainer	and(ArrayContainer value2) Computes the bitwise AND of this container with another (intersection).
Container	and(BitmapContainer x) Computes the bitwise AND of this container with another (intersection).
ArrayContainer	andNot(ArrayContainer value2) Computes the bitwise ANDNOT of this container with another (difference).
ArrayContainer	andNot(BitmapContainer value2) Computes the bitwise ANDNOT of this container with another (difference).
void	clear() Empties the container
ArrayContainer	clone()
boolean	contains(short x) Checks whether the contain contains the provided value
void	deserialize(DataInput in) Deserialize (recover) the container.
boolean	equals(Object o)
void	fillLeastSignificant16bits(int[] x, int i, int mask) Fill the least significant 16 bits of the integer array, starting at index index, with the short values from this container.
protected int	getArraySizeInBytes() Size of the underlying array
int	getCardinality() Computes the distinct number of short values in the container.
ShortIterator	getShortIterator() Iterator to visit the short values in the container
int	getSizeInBytes() Computes an estimate of the memory usage of this container.
int	hashCode()
ArrayContainer	iand(ArrayContainer value2) Computes the in-place bitwise AND of this container with another (intersection).
Container	iand(BitmapContainer value2) Computes the in-place bitwise AND of this container with another (intersection).
ArrayContainer	iandNot(ArrayContainer value2) Computes the in-place bitwise ANDNOT of this container with another (difference).
ArrayContainer	iandNot(BitmapContainer value2) Computes the in-place bitwise ANDNOT of this container with another (difference).
Container	inot(int firstOfRange, int lastOfRange) Computes the in-place bitwise NOT of this container (complement).
Container	ior(ArrayContainer value2) Computes the in-place bitwise OR of this container with another (union).
Container	ior(BitmapContainer x) Computes the in-place bitwise OR of this container with another (union).
Iterator<Short>	iterator()
Container	ixor(ArrayContainer value2) Computes the in-place bitwise OR of this container with another (union).
Container	ixor(BitmapContainer x) Computes the in-place bitwise OR of this container with another (union).
Container	limit(int maxcardinality) Create a new Container containing at most maxcardinality integers.
protected void	loadData(BitmapContainer bitmapContainer)
Container	not(int firstOfRange, int lastOfRange) Computes the bitwise NOT of this container (complement).
Container	or(ArrayContainer value2) Computes the bitwise OR of this container with another (union).
Container	or(BitmapContainer x) Computes the bitwise OR of this container with another (union).
int	rank(short lowbits) Rank returns the number of integers that are smaller or equal to x (Rank(infinity) would be GetCardinality()).
void	readExternal(ObjectInput in)
Container	remove(short x) Remove the short from this container.
short	select(int j) Return the jth value
void	serialize(DataOutput out) Serialize the container.
int	serializedSizeInBytes() Report the number of bytes required to serialize this container.
BitmapContainer	toBitmapContainer() Copies the data in a bitmap container.
String	toString()
void	trim() If possible, recover wasted memory.
protected void	writeArray(DataOutput out) Write just the underlying array.
void	writeExternal(ObjectOutput out)
Container	xor(ArrayContainer value2) Computes the bitwise OR of this container with another (union).
Container	xor(BitmapContainer x) Computes the bitwise OR of this container with another (union).

Methods inherited from class org.roaringbitmap.Container

and, andNot, iand, iandNot, ior, ixor, lazyIOR, lazyOR, or, rangeOfOnes, xor

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

cardinality

protected int cardinality

Constructor Detail

ArrayContainer

public ArrayContainer()

Create an array container with default capacity

ArrayContainer

public ArrayContainer(int capacity)

Create an array container with specified capacity

Parameters:

capacity - The capacity of the container

ArrayContainer

public ArrayContainer(int firstOfRun,
                      int lastOfRun)

Create an array container with a run of ones from firstOfRun to lastOfRun, inclusive. Caller is responsible for making sure the range is small enough that ArrayContainer is appropriate.

Parameters:

firstOfRun - first index

lastOfRun - last index (range is inclusive)

ArrayContainer

protected ArrayContainer(short[] newContent)

Method Detail

add

public Container add(short x)

running time is in O(n) time if insert is not in order.

Specified by:

add in class Container

Parameters:

x - short to be added

Returns:

the new container

and

public ArrayContainer and(ArrayContainer value2)

Description copied from class: Container

Computes the bitwise AND of this container with another (intersection). This container as well as the provided container are left unaffected.

Specified by:

and in class Container

Parameters:

value2 - other container

Returns:

aggregated container

and

public Container and(BitmapContainer x)

Description copied from class: Container

Computes the bitwise AND of this container with another (intersection). This container as well as the provided container are left unaffected.

Specified by:

and in class Container

Parameters:

x - other container

Returns:

aggregated container

andNot

public ArrayContainer andNot(ArrayContainer value2)

Description copied from class: Container

Computes the bitwise ANDNOT of this container with another (difference). This container as well as the provided container are left unaffected.

Specified by:

andNot in class Container

Parameters:

value2 - other container

Returns:

aggregated container

andNot

public ArrayContainer andNot(BitmapContainer value2)

Description copied from class: Container

Computes the bitwise ANDNOT of this container with another (difference). This container as well as the provided container are left unaffected.

Specified by:

andNot in class Container

Parameters:

value2 - other container

Returns:

aggregated container

clear

public void clear()

Description copied from class: Container

Empties the container

Specified by:

clear in class Container

clone

public ArrayContainer clone()

Specified by:

clone in class Container

contains

public boolean contains(short x)

Description copied from class: Container

Checks whether the contain contains the provided value

Specified by:

contains in class Container

Parameters:

x - value to check

Returns:

whether the value is in the container

deserialize

public void deserialize(DataInput in)
                 throws IOException

Description copied from class: Container

Deserialize (recover) the container.

Specified by:

deserialize in class Container

Parameters:

in - the DataInput stream

Throws:

IOException - Signals that an I/O exception has occurred.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

fillLeastSignificant16bits

public void fillLeastSignificant16bits(int[] x,
                                       int i,
                                       int mask)

Description copied from class: Container

Fill the least significant 16 bits of the integer array, starting at index index, with the short values from this container. The caller is responsible to allocate enough room. The most significant 16 bits of each integer are given by the most significant bits of the provided mask.

Specified by:

fillLeastSignificant16bits in class Container

Parameters:

x - provided array

i - starting index

mask - indicates most significant bits

getArraySizeInBytes

protected int getArraySizeInBytes()

Description copied from class: Container

Size of the underlying array

Specified by:

getArraySizeInBytes in class Container

Returns:

size in bytes

getCardinality

public int getCardinality()

Description copied from class: Container

Computes the distinct number of short values in the container. Can be expected to run in constant time.

Specified by:

getCardinality in class Container

Returns:

the cardinality

getShortIterator

public ShortIterator getShortIterator()

Description copied from class: Container

Iterator to visit the short values in the container

Specified by:

getShortIterator in class Container

Returns:

iterator

getSizeInBytes

public int getSizeInBytes()

Description copied from class: Container

Computes an estimate of the memory usage of this container. The estimate is not meant to be exact.

Specified by:

getSizeInBytes in class Container

Returns:

estimated memory usage in bytes

hashCode

public int hashCode()

Overrides:

hashCode in class Object

iand

public ArrayContainer iand(ArrayContainer value2)

Description copied from class: Container

Computes the in-place bitwise AND of this container with another (intersection). The current container is generally modified, whereas the provided container (x) is unaffected. May generate a new container.

Specified by:

iand in class Container

Parameters:

value2 - other container

Returns:

aggregated container

iand

public Container iand(BitmapContainer value2)

Description copied from class: Container

Computes the in-place bitwise AND of this container with another (intersection). The current container is generally modified, whereas the provided container (x) is unaffected. May generate a new container.

Specified by:

iand in class Container

Parameters:

value2 - other container

Returns:

aggregated container

iandNot

public ArrayContainer iandNot(ArrayContainer value2)

Description copied from class: Container

Computes the in-place bitwise ANDNOT of this container with another (difference). The current container is generally modified, whereas the provided container (x) is unaffected. May generate a new container.

Specified by:

iandNot in class Container

Parameters:

value2 - other container

Returns:

aggregated container

iandNot

public ArrayContainer iandNot(BitmapContainer value2)

Description copied from class: Container

Computes the in-place bitwise ANDNOT of this container with another (difference). The current container is generally modified, whereas the provided container (x) is unaffected. May generate a new container.

Specified by:

iandNot in class Container

Parameters:

value2 - other container

Returns:

aggregated container

inot

public Container inot(int firstOfRange,
                      int lastOfRange)

Description copied from class: Container

Computes the in-place bitwise NOT of this container (complement). Only those bits within the range are affected. The current container is generally modified. May generate a new container.

Specified by:

inot in class Container

Parameters:

firstOfRange - beginning of range (inclusive); 0 is beginning of this container.

lastOfRange - ending of range (exclusive)

Returns:

(partially) completmented container

ior

public Container ior(ArrayContainer value2)

Description copied from class: Container

Computes the in-place bitwise OR of this container with another (union). The current container is generally modified, whereas the provided container (x) is unaffected. May generate a new container.

Specified by:

ior in class Container

Parameters:

value2 - other container

Returns:

aggregated container

ior

public Container ior(BitmapContainer x)

Description copied from class: Container

Computes the in-place bitwise OR of this container with another (union). The current container is generally modified, whereas the provided container (x) is unaffected. May generate a new container.

Specified by:

ior in class Container

Parameters:

x - other container

Returns:

aggregated container

iterator

public Iterator<Short> iterator()

Specified by:

iterator in interface Iterable<Short>

ixor

public Container ixor(ArrayContainer value2)

Description copied from class: Container

Computes the in-place bitwise OR of this container with another (union). The current container is generally modified, whereas the provided container (x) is unaffected. May generate a new container.

Specified by:

ixor in class Container

Parameters:

value2 - other container

Returns:

aggregated container

ixor

public Container ixor(BitmapContainer x)

Description copied from class: Container

Computes the in-place bitwise OR of this container with another (union). The current container is generally modified, whereas the provided container (x) is unaffected. May generate a new container.

Specified by:

ixor in class Container

Parameters:

x - other container

Returns:

aggregated container

loadData

protected void loadData(BitmapContainer bitmapContainer)

not

public Container not(int firstOfRange,
                     int lastOfRange)

Description copied from class: Container

Computes the bitwise NOT of this container (complement). Only those bits within the range are affected. The current container is left unaffected.

Specified by:

not in class Container

Parameters:

firstOfRange - beginning of range (inclusive); 0 is beginning of this container.

lastOfRange - ending of range (exclusive)

Returns:

(partially) completmented container

or

public Container or(ArrayContainer value2)

Description copied from class: Container

Computes the bitwise OR of this container with another (union). This container as well as the provided container are left unaffected.

Specified by:

or in class Container

Parameters:

value2 - other container

Returns:

aggregated container

or

public Container or(BitmapContainer x)

Description copied from class: Container

Computes the bitwise OR of this container with another (union). This container as well as the provided container are left unaffected.

Specified by:

or in class Container

Parameters:

x - other container

Returns:

aggregated container

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException

remove

public Container remove(short x)

Description copied from class: Container

Remove the short from this container. May create a new container.

Specified by:

remove in class Container

Parameters:

x - to be removed

Returns:

New container

serialize

public void serialize(DataOutput out)
               throws IOException

Description copied from class: Container

Serialize the container.

Specified by:

serialize in class Container

Parameters:

out - the DataOutput stream

Throws:

IOException - Signals that an I/O exception has occurred.

serializedSizeInBytes

public int serializedSizeInBytes()

Description copied from class: Container

Report the number of bytes required to serialize this container.

Specified by:

serializedSizeInBytes in class Container

Returns:

the size in bytes

toBitmapContainer

public BitmapContainer toBitmapContainer()

Copies the data in a bitmap container.

Returns:

the bitmap container

toString

public String toString()

Overrides:

toString in class Object

trim

public void trim()

Description copied from class: Container

If possible, recover wasted memory.

Specified by:

trim in class Container

writeArray

protected void writeArray(DataOutput out)
                   throws IOException

Description copied from class: Container

Write just the underlying array.

Specified by:

writeArray in class Container

Parameters:

out - output stream

Throws:

IOException - in case of failure

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

xor

public Container xor(ArrayContainer value2)

Description copied from class: Container

Computes the bitwise OR of this container with another (union). This container as well as the provided container are left unaffected.

Specified by:

xor in class Container

Parameters:

value2 - other container

Returns:

aggregated container

xor

public Container xor(BitmapContainer x)

Description copied from class: Container

Computes the bitwise OR of this container with another (union). This container as well as the provided container are left unaffected.

Specified by:

xor in class Container

Parameters:

x - other container

Returns:

aggregated container

rank

public int rank(short lowbits)

Description copied from class: Container

Rank returns the number of integers that are smaller or equal to x (Rank(infinity) would be GetCardinality()).

Specified by:

rank in class Container

Parameters:

lowbits - upper limit

Returns:

the rank

select

public short select(int j)

Description copied from class: Container

Return the jth value

Specified by:

select in class Container

Parameters:

j - index of the value

Returns:

the value

limit

public Container limit(int maxcardinality)

Description copied from class: Container

Create a new Container containing at most maxcardinality integers.

Specified by:

limit in class Container

Parameters:

maxcardinality - maximal cardinality

Returns:

a new bitmap with cardinality no more than maxcardinality