org.apache.flink.table.dataview

Class ListViewSerializer<T>

java.lang.Object

org.apache.flink.api.common.typeutils.TypeSerializer<ListView<T>>

org.apache.flink.table.dataview.ListViewSerializer<T>

Type Parameters:

T - The type of element in the list.

All Implemented Interfaces:

Serializable, org.apache.flink.api.common.typeutils.LegacySerializerSnapshotTransformer<ListView<T>>

@Internal
public class ListViewSerializer<T>
extends org.apache.flink.api.common.typeutils.TypeSerializer<ListView<T>>
implements org.apache.flink.api.common.typeutils.LegacySerializerSnapshotTransformer<ListView<T>>

A serializer for [[ListView]]. The serializer relies on an element serializer for the serialization of the list's elements.

The serialization format for the list is as follows: four bytes for the length of the list, followed by the serialized representation of each element.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ListViewSerializer(org.apache.flink.api.common.typeutils.TypeSerializer<List<T>> listSerializer)

Method Summary

Modifier and Type	Method and Description
void	copy(org.apache.flink.core.memory.DataInputView source, org.apache.flink.core.memory.DataOutputView target)
ListView<T>	copy(ListView<T> from)
ListView<T>	copy(ListView<T> from, ListView<T> reuse)
ListView<T>	createInstance()
ListView<T>	deserialize(org.apache.flink.core.memory.DataInputView source)
ListView<T>	deserialize(ListView<T> reuse, org.apache.flink.core.memory.DataInputView source)
org.apache.flink.api.common.typeutils.TypeSerializer<ListView<T>>	duplicate()
boolean	equals(Object obj)
int	getLength()
org.apache.flink.api.common.typeutils.TypeSerializer<List<T>>	getListSerializer()
int	hashCode()
boolean	isImmutableType()
void	serialize(ListView<T> record, org.apache.flink.core.memory.DataOutputView target)
org.apache.flink.api.common.typeutils.TypeSerializerSnapshot<ListView<T>>	snapshotConfiguration()
<U> org.apache.flink.api.common.typeutils.TypeSerializerSnapshot<ListView<T>>	transformLegacySerializerSnapshot(org.apache.flink.api.common.typeutils.TypeSerializerSnapshot<U> legacySnapshot) We need to override this as a LegacySerializerSnapshotTransformer because in Flink 1.6.x and below, this serializer was incorrectly returning directly the snapshot of the nested list serializer as its own snapshot.

Methods inherited from class java.lang.Object

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

Constructor Detail

ListViewSerializer

public ListViewSerializer(org.apache.flink.api.common.typeutils.TypeSerializer<List<T>> listSerializer)

Method Detail

isImmutableType

public boolean isImmutableType()

Specified by:

isImmutableType in class org.apache.flink.api.common.typeutils.TypeSerializer<ListView<T>>

duplicate

public org.apache.flink.api.common.typeutils.TypeSerializer<ListView<T>> duplicate()

Specified by:

duplicate in class org.apache.flink.api.common.typeutils.TypeSerializer<ListView<T>>

createInstance

public ListView<T> createInstance()

Specified by:

createInstance in class org.apache.flink.api.common.typeutils.TypeSerializer<ListView<T>>

copy

public ListView<T> copy(ListView<T> from)

Specified by:

copy in class org.apache.flink.api.common.typeutils.TypeSerializer<ListView<T>>

copy

public ListView<T> copy(ListView<T> from,
                        ListView<T> reuse)

Specified by:

copy in class org.apache.flink.api.common.typeutils.TypeSerializer<ListView<T>>

getLength

public int getLength()

Specified by:

getLength in class org.apache.flink.api.common.typeutils.TypeSerializer<ListView<T>>

serialize

public void serialize(ListView<T> record,
                      org.apache.flink.core.memory.DataOutputView target)
               throws IOException

Specified by:

serialize in class org.apache.flink.api.common.typeutils.TypeSerializer<ListView<T>>

Throws:

IOException

deserialize

public ListView<T> deserialize(org.apache.flink.core.memory.DataInputView source)
                        throws IOException

Specified by:

deserialize in class org.apache.flink.api.common.typeutils.TypeSerializer<ListView<T>>

Throws:

IOException

deserialize

public ListView<T> deserialize(ListView<T> reuse,
                               org.apache.flink.core.memory.DataInputView source)
                        throws IOException

Specified by:

deserialize in class org.apache.flink.api.common.typeutils.TypeSerializer<ListView<T>>

Throws:

IOException

copy

public void copy(org.apache.flink.core.memory.DataInputView source,
                 org.apache.flink.core.memory.DataOutputView target)
          throws IOException

Specified by:

copy in class org.apache.flink.api.common.typeutils.TypeSerializer<ListView<T>>

Throws:

IOException

equals

public boolean equals(Object obj)

Specified by:

equals in class org.apache.flink.api.common.typeutils.TypeSerializer<ListView<T>>

hashCode

public int hashCode()

Specified by:

hashCode in class org.apache.flink.api.common.typeutils.TypeSerializer<ListView<T>>

snapshotConfiguration

public org.apache.flink.api.common.typeutils.TypeSerializerSnapshot<ListView<T>> snapshotConfiguration()

Specified by:

snapshotConfiguration in class org.apache.flink.api.common.typeutils.TypeSerializer<ListView<T>>

transformLegacySerializerSnapshot

public <U> org.apache.flink.api.common.typeutils.TypeSerializerSnapshot<ListView<T>> transformLegacySerializerSnapshot(org.apache.flink.api.common.typeutils.TypeSerializerSnapshot<U> legacySnapshot)

We need to override this as a LegacySerializerSnapshotTransformer because in Flink 1.6.x and below, this serializer was incorrectly returning directly the snapshot of the nested list serializer as its own snapshot.

This method transforms the incorrect list serializer snapshot to be a proper ListViewSerializerSnapshot.

Specified by:

transformLegacySerializerSnapshot in interface org.apache.flink.api.common.typeutils.LegacySerializerSnapshotTransformer<ListView<T>>

getListSerializer

public org.apache.flink.api.common.typeutils.TypeSerializer<List<T>> getListSerializer()