org.apache.iotdb.tsfile.utils

Class BitMap

java.lang.Object

org.apache.iotdb.tsfile.utils.BitMap

public class BitMap
extends Object

Constructor Summary

Constructors

Constructor and Description
BitMap(int size) Initialize a BitMap with given size.
BitMap(int size, byte[] bits) Initialize a BitMap with given size and bytes.

Method Summary

Modifier and Type	Method and Description
BitMap	clone()
static void	copyOfRange(BitMap src, int srcPos, BitMap dest, int destPos, int length) Copies a bitmap from the specified source bitmap, beginning at the specified position, to the specified position of the destination bitmap.
boolean	equals(Object obj)
byte[]	getByteArray()
int	getSize()
int	hashCode()
boolean	isAllMarked() whether all bits are one, i.e., all are Null
boolean	isAllUnmarked() whether all bits are zero, i.e., no Null value
boolean	isMarked(int position) returns the value of the bit with the specified index.
void	mark(int position) mark as 1 at the given bit position.
void	markAll() mark as 1 at all positions.
void	reset() mark as 0 at all positions.
String	toString()
void	unmark(int position)

Methods inherited from class java.lang.Object

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

Constructor Detail

BitMap

public BitMap(int size)

Initialize a BitMap with given size.

BitMap

public BitMap(int size,
              byte[] bits)

Initialize a BitMap with given size and bytes.

Method Detail

getByteArray

public byte[] getByteArray()

getSize

public int getSize()

isMarked

public boolean isMarked(int position)

returns the value of the bit with the specified index.

markAll

public void markAll()

mark as 1 at all positions.

mark

public void mark(int position)

mark as 1 at the given bit position.

reset

public void reset()

mark as 0 at all positions.

unmark

public void unmark(int position)

isAllUnmarked

public boolean isAllUnmarked()

whether all bits are zero, i.e., no Null value

isAllMarked

public boolean isAllMarked()

whether all bits are one, i.e., all are Null

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

clone

public BitMap clone()

Overrides:

clone in class Object

copyOfRange

public static void copyOfRange(BitMap src,
                               int srcPos,
                               BitMap dest,
                               int destPos,
                               int length)

Copies a bitmap from the specified source bitmap, beginning at the specified position, to the specified position of the destination bitmap. A subsequence of bits are copied from the source bitmap referenced by src to the destination bitmap referenced by dest. The number of bits copied is equal to the length argument. The bits at positions srcPos through srcPos+length-1 in the source bitmap are copied into positions destPos through destPos+length-1, respectively, of the destination bitmap.

Parameters:

src - the source bitmap.

srcPos - starting position in the source bitmap.

dest - the destination bitmap.

destPos - starting position in the destination bitmap.

length - the number of bits to be copied.

Throws:

IndexOutOfBoundsException - if copying would cause access of data outside bitmap bounds.