org.apache.paimon.fileindex.bitmap

Class 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)
 

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	BitmapFileIndexMeta.DataTypeVisitorAdapter<R> simplified visitor.
static interface	BitmapFileIndexMeta.ThrowableConsumer functional interface.
static interface	BitmapFileIndexMeta.ThrowableSupplier functional interface.

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
boolean	contains(Object bitmapId)
void	deserialize(DataInput in)
int	getOffset(Object bitmapId)
int	getRowCount()
void	serialize(DataOutput out)

Methods inherited from class java.lang.Object

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

Constructor Detail

BitmapFileIndexMeta

public BitmapFileIndexMeta(DataType dataType)

BitmapFileIndexMeta

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

Method Detail

getRowCount

public int getRowCount()

contains

public boolean contains(Object bitmapId)

getOffset

public int getOffset(Object bitmapId)

serialize

public void serialize(DataOutput out)
               throws Exception

Throws:

Exception

deserialize

public void deserialize(DataInput in)
                 throws Exception

Throws:

Exception