模块 roaringbitmap

程序包 org.bitlap.roaringbitmap.longlong

接口 ImmutableLongBitmapDataProvider

所有已知子接口:

LongBitmapDataProvider

所有已知实现类:

Roaring64Bitmap, Roaring64NavigableMap

public interface ImmutableLongBitmapDataProvider

Interface representing an immutable bitmap.

嵌套类概要

嵌套类

修饰符和类型	接口	说明
static final class	ImmutableLongBitmapDataProvider.RoaringOfLong	An internal class to help provide streams.

方法概要

修饰符和类型	方法	说明
boolean	contains(long x)	Checks whether the value in included, which is equivalent to checking if the corresponding bit is set (get in BitSet class).
long	first()	Get the first (smallest) integer in this RoaringBitmap, that is, return the minimum of the set.
void	forEach(LongConsumer lc)	Visit all values in the bitmap and pass them to the consumer
long	getLongCardinality()	Returns the number of distinct integers added to the bitmap (e.g., number of bits set).
LongIterator	getLongIterator()	For better performance, consider the Use the forEach method.
long	getLongSizeInBytes()	Estimate of the memory usage of this data structure.
LongIterator	getReverseLongIterator()
int	getSizeInBytes()	Estimate of the memory usage of this data structure.
boolean	isEmpty()	Checks whether the bitmap is empty.
long	last()	Get the last (largest) integer in this RoaringBitmap, that is, return the maximum of the set.
ImmutableLongBitmapDataProvider	limit(long x)	Create a new bitmap of the same class, containing at most maxcardinality integers.
long	rankLong(long x)	Rank returns the number of integers that are smaller or equal to x (Rank(infinity) would be GetCardinality()).
default LongStream	reverseStream()
long	select(long j)	Return the jth value stored in this bitmap.
void	serialize(DataOutput out)	Serialize this bitmap.
long	serializedSizeInBytes()	Report the number of bytes required to serialize this bitmap.
default LongStream	stream()
long[]	toArray()	Return the set values as an array.

方法详细资料

contains

boolean contains(long x)

Checks whether the value in included, which is equivalent to checking if the corresponding bit is set (get in BitSet class).

参数:

x - long value

返回:

whether the long value is included.

getLongCardinality

long getLongCardinality()

Returns the number of distinct integers added to the bitmap (e.g., number of bits set). This returns a full 64-bit result.

返回:

the cardinality

forEach

void forEach(LongConsumer lc)

Visit all values in the bitmap and pass them to the consumer. * Usage:

 
  bitmap.forEach(new LongConsumer() {

    {@literal @}Override
    public void accept(long value) {
      // do something here
      
    }});
   
 }
 

参数:

lc - the consumer

getLongIterator

LongIterator getLongIterator()

For better performance, consider the Use the forEach method.

返回:

a custom iterator over set bits, the bits are traversed in ascending sorted order

getReverseLongIterator

LongIterator getReverseLongIterator()

返回:

a custom iterator over set bits, the bits are traversed in descending sorted order

stream

default LongStream stream()

返回:

an Ordered, Distinct, Sorted and Sized IntStream in ascending order

reverseStream

default LongStream reverseStream()

返回:

an Ordered, Distinct and Sized IntStream providing bits in descending sorted order

getSizeInBytes

int getSizeInBytes()

Estimate of the memory usage of this data structure. Internally, this is computed as a 64-bit counter.

返回:

estimated memory usage.

getLongSizeInBytes

long getLongSizeInBytes()

Estimate of the memory usage of this data structure. Provides full 64-bit number.

返回:

estimated memory usage.

isEmpty

boolean isEmpty()

Checks whether the bitmap is empty.

返回:

true if this bitmap contains no set bit

limit

ImmutableLongBitmapDataProvider limit(long x)

Create a new bitmap of the same class, containing at most maxcardinality integers.

参数:

x - maximal cardinality

返回:

a new bitmap with cardinality no more than maxcardinality

rankLong

long rankLong(long x)

Rank returns the number of integers that are smaller or equal to x (Rank(infinity) would be GetCardinality()). The value is a full 64-bit value.

参数:

x - upper limit

返回:

the rank

select

long select(long j)

Return the jth value stored in this bitmap.

参数:

j - index of the value

返回:

the value

first

long first()

Get the first (smallest) integer in this RoaringBitmap, that is, return the minimum of the set.

返回:

the first (smallest) integer

抛出:

NoSuchElementException - if empty

last

long last()

Get the last (largest) integer in this RoaringBitmap, that is, return the maximum of the set.

返回:

the last (largest) integer

抛出:

NoSuchElementException - if empty

serialize

void serialize(DataOutput out)
        throws IOException

Serialize this bitmap. The current bitmap is not modified.

参数:

out - the DataOutput stream

抛出:

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

serializedSizeInBytes

long serializedSizeInBytes()

Report the number of bytes required to serialize this bitmap. This is the number of bytes written out when using the serialize method. When using the writeExternal method, the count will be higher due to the overhead of Java serialization.

返回:

the size in bytes

toArray

long[] toArray()

Return the set values as an array. The integer values are in sorted order.

返回:

array representing the set values.