org.apache.flink.table.dataformat

类 LazyBinaryFormat<T>

java.lang.Object

org.apache.flink.table.dataformat.LazyBinaryFormat<T>

所有已实现的接口:

BinaryFormat

直接已知子类:

BinaryGeneric, BinaryString

public abstract class LazyBinaryFormat<T>
extends Object
implements BinaryFormat

Lazy binary format.

If the Binary format is used in all the SQL representations, consider the following Case: udf0(input) -> udf1(result0) -> udf2(result1) ->udf3 (result2) Such nested calls, if udf's return values are JavaObject format, will result in multiple conversions if store local variables in Binary format: converterToBinary(Udf0(converterToJavaObject(input))) -> converterToBinary(Udf1(converterToJavaObject(result0))) .....

So we introduced Lazy Binary Format to avoid this situation, Lazy Binary Format has three forms: 1. Binary form 2. JavaObject form 3. Binary and JavaObject coexist It can lazy the conversions as much as possible. Only when it is needed can it be converted into the required form.

字段概要

从接口继承的字段 org.apache.flink.table.dataformat.BinaryFormat

HIGHEST_FIRST_BIT, HIGHEST_SECOND_TO_EIGHTH_BIT, MAX_FIX_PART_DATA_SIZE

构造器概要

构造器

构造器和说明
LazyBinaryFormat()
LazyBinaryFormat(org.apache.flink.core.memory.MemorySegment[] segments, int offset, int sizeInBytes)
LazyBinaryFormat(org.apache.flink.core.memory.MemorySegment[] segments, int offset, int sizeInBytes, T javaObject)
LazyBinaryFormat(T javaObject)
LazyBinaryFormat(T javaObject, BinarySection binarySection)

方法概要

限定符和类型	方法和说明
void	ensureMaterialized(org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer) Ensure we have materialized binary format.
BinarySection	getBinarySection()
T	getJavaObject()
int	getOffset()
org.apache.flink.core.memory.MemorySegment[]	getSegments()
int	getSizeInBytes()
protected abstract BinarySection	materialize(org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer) Materialize java object to binary format.
void	setJavaObject(T javaObject) Must be public as it is used during code generation.

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.flink.table.dataformat.BinaryFormat

readBinaryFieldFromSegments, readBinaryStringFieldFromSegments

构造器详细资料

LazyBinaryFormat

public LazyBinaryFormat()

LazyBinaryFormat

public LazyBinaryFormat(org.apache.flink.core.memory.MemorySegment[] segments,
                        int offset,
                        int sizeInBytes,
                        T javaObject)

LazyBinaryFormat

public LazyBinaryFormat(org.apache.flink.core.memory.MemorySegment[] segments,
                        int offset,
                        int sizeInBytes)

LazyBinaryFormat

public LazyBinaryFormat(T javaObject)

LazyBinaryFormat

public LazyBinaryFormat(T javaObject,
                        BinarySection binarySection)

方法详细资料

getJavaObject

public T getJavaObject()

getBinarySection

public BinarySection getBinarySection()

setJavaObject

public void setJavaObject(T javaObject)

Must be public as it is used during code generation.

getSegments

public org.apache.flink.core.memory.MemorySegment[] getSegments()

指定者:

getSegments 在接口中 BinaryFormat

getOffset

public int getOffset()

指定者:

getOffset 在接口中 BinaryFormat

getSizeInBytes

public int getSizeInBytes()

指定者:

getSizeInBytes 在接口中 BinaryFormat

ensureMaterialized

public final void ensureMaterialized(org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer)

Ensure we have materialized binary format.

materialize

protected abstract BinarySection materialize(org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer)
                                      throws IOException

Materialize java object to binary format. Inherited classes need to hold the information they need. (For example, BinaryGeneric needs javaObjectSerializer).

抛出:

IOException