org.apache.paimon.data.serializer

类 NullableSerializer<T>

java.lang.Object

org.apache.paimon.data.serializer.NullableSerializer<T>

所有已实现的接口:

Serializable, Serializer<T>

public class NullableSerializer<T>
extends Object
implements Serializer<T>

Serializer wrapper to add support of null value serialization.

另请参阅:

序列化表格

方法概要

限定符和类型	方法和说明
static <T> boolean	checkIfNullSupported(Serializer<T> serializer) This method checks if serializer supports null value.
T	copy(T from) Creates a deep copy of the given element in a new element.
T	deserialize(DataInputView source) De-serializes a record from the given source input view.
Serializer<T>	duplicate() Creates a deep copy of this serializer if it is necessary, i.e. if it is stateful.
boolean	equals(Object obj)
int	hashCode()
void	serialize(T record, DataOutputView target) Serializes the given record to the given target output view.
static <T> Serializer<T>	wrap(Serializer<T> originalSerializer) This method wraps the originalSerializer with the NullableSerializer if not already wrapped.
static <T> Serializer<T>	wrapIfNullIsNotSupported(Serializer<T> originalSerializer) This method tries to serialize null value with the originalSerializer and wraps it in case of NullPointerException, otherwise it returns the originalSerializer.

从类继承的方法 java.lang.Object

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

方法详细资料

wrapIfNullIsNotSupported

public static <T> Serializer<T> wrapIfNullIsNotSupported(@Nonnull
                                                         Serializer<T> originalSerializer)

This method tries to serialize null value with the originalSerializer and wraps it in case of NullPointerException, otherwise it returns the originalSerializer.

参数:

originalSerializer - serializer to wrap and add null support

返回:

serializer which supports null values

checkIfNullSupported

public static <T> boolean checkIfNullSupported(Serializer<T> serializer)

This method checks if serializer supports null value.

参数:

serializer - serializer to check

wrap

public static <T> Serializer<T> wrap(Serializer<T> originalSerializer)

This method wraps the originalSerializer with the NullableSerializer if not already wrapped.

参数:

originalSerializer - serializer to wrap and add null support

返回:

wrapped serializer which supports null values

duplicate

public Serializer<T> duplicate()

从接口复制的说明: Serializer

Creates a deep copy of this serializer if it is necessary, i.e. if it is stateful. This can return itself if the serializer is not stateful.

We need this because Serializers might be used in several threads. Stateless serializers are inherently thread-safe while stateful serializers might not be thread-safe.

指定者:

duplicate 在接口中 Serializer<T>

copy

public T copy(T from)

从接口复制的说明: Serializer

Creates a deep copy of the given element in a new element.

指定者:

copy 在接口中 Serializer<T>

参数:

from - The element reuse be copied.

返回:

A deep copy of the element.

serialize

public void serialize(T record,
                      DataOutputView target)
               throws IOException

从接口复制的说明: Serializer

Serializes the given record to the given target output view.

指定者:

serialize 在接口中 Serializer<T>

参数:

record - The record to serialize.

target - The output view to write the serialized data to.

抛出:

IOException - Thrown, if the serialization encountered an I/O related error. Typically raised by the output view, which may have an underlying I/O channel to which it delegates.

deserialize

public T deserialize(DataInputView source)
              throws IOException

从接口复制的说明: Serializer

De-serializes a record from the given source input view.

指定者:

deserialize 在接口中 Serializer<T>

参数:

source - The input view from which to read the data.

返回:

The deserialized element.

抛出:

IOException - Thrown, if the de-serialization encountered an I/O related error. Typically raised by the input view, which may have an underlying I/O channel from which it reads.

equals

public boolean equals(Object obj)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object