org.apache.paimon.fileindex.bitmap

类 BitmapFileIndexMeta

java.lang.Object

org.apache.paimon.fileindex.bitmap.BitmapFileIndexMeta

public class BitmapFileIndexMeta
extends Object

 Bitmap file index format (V1)
 +-------------------------------------------------+-----------------
 ｜ version (1 byte)                               ｜
 +-------------------------------------------------+
 ｜ row count (4 bytes int)                        ｜
 +-------------------------------------------------+
 ｜ non-null value bitmap number (4 bytes int)     ｜
 +-------------------------------------------------+
 ｜ has null value (1 byte)                        ｜
 +-------------------------------------------------+
 ｜ null value offset (4 bytes if has null value)  ｜       HEAD
 +-------------------------------------------------+
 ｜ value 1 | offset 1                             ｜
 +-------------------------------------------------+
 ｜ value 2 | offset 2                             ｜
 +-------------------------------------------------+
 ｜ value 3 | offset 3                             ｜
 +-------------------------------------------------+
 ｜ ...                                            ｜
 +-------------------------------------------------+-----------------
 ｜ serialized bitmap 1                            ｜
 +-------------------------------------------------+
 ｜ serialized bitmap 2                            ｜
 +-------------------------------------------------+       BODY
 ｜ serialized bitmap 3                            ｜
 +-------------------------------------------------+
 ｜ ...                                            ｜
 +-------------------------------------------------+-----------------

 value x:                       var bytes for any data type (as bitmap identifier)
 offset:                        4 bytes int (when it is negative, it represents that there is only one value
                                  and its position is the inverse of the negative value)
 

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	BitmapFileIndexMeta.DataTypeVisitorAdapter<R> simplified visitor.
static interface	BitmapFileIndexMeta.ThrowableConsumer functional interface.
static interface	BitmapFileIndexMeta.ThrowableSupplier functional interface.

构造器概要

构造器

构造器和说明
BitmapFileIndexMeta(DataType dataType)
BitmapFileIndexMeta(DataType dataType, int rowCount, int nonNullBitmapNumber, boolean hasNullValue, int nullValueOffset, LinkedHashMap<Object,Integer> bitmapOffsets)

方法概要

限定符和类型	方法和说明
boolean	contains(Object bitmapId)
void	deserialize(DataInput in)
int	getOffset(Object bitmapId)
int	getRowCount()
void	serialize(DataOutput out)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

BitmapFileIndexMeta

public BitmapFileIndexMeta(DataType dataType)

BitmapFileIndexMeta

public BitmapFileIndexMeta(DataType dataType,
                           int rowCount,
                           int nonNullBitmapNumber,
                           boolean hasNullValue,
                           int nullValueOffset,
                           LinkedHashMap<Object,Integer> bitmapOffsets)

方法详细资料

getRowCount

public int getRowCount()

contains

public boolean contains(Object bitmapId)

getOffset

public int getOffset(Object bitmapId)

serialize

public void serialize(DataOutput out)
               throws Exception

抛出:

Exception

deserialize

public void deserialize(DataInput in)
                 throws Exception

抛出:

Exception