Package org.apache.flink.api.common.typeutils

Class NestedSerializersSnapshotDelegate

java.lang.Object

org.apache.flink.api.common.typeutils.NestedSerializersSnapshotDelegate

@Internal
public class NestedSerializersSnapshotDelegate
extends Object

A NestedSerializersSnapshotDelegate represents the snapshots of multiple serializers that are used by an outer serializer. Examples would be tuples, where the outer serializer is the tuple format serializer, and the NestedSerializersSnapshotDelegate holds the serializers for the different tuple fields.

The NestedSerializersSnapshotDelegate does not implement the TypeSerializerSnapshot interface. It is not meant to be inherited from, but to be composed with a serializer snapshot implementation.

The NestedSerializersSnapshotDelegate has its own versioning internally, it does not couple its versioning to the versioning of the TypeSerializerSnapshot that builds on top of this class. That way, the NestedSerializersSnapshotDelegate and enclosing TypeSerializerSnapshot the can evolve their formats independently.

Constructor Summary

Constructors

Constructor	Description
NestedSerializersSnapshotDelegate(TypeSerializer<?>... serializers)	Constructor to create a snapshot for writing.

Method Summary

Modifier and Type	Method	Description
TypeSerializerSnapshot<?>[]	getNestedSerializerSnapshots()	Returns the snapshots of the nested serializers.
<T> TypeSerializer<T>	getRestoredNestedSerializer(int pos)	Creates the restore serializer from the pos-th config snapshot.
TypeSerializer<?>[]	getRestoredNestedSerializers()	Produces a restore serializer from each contained serializer configuration snapshot.
static NestedSerializersSnapshotDelegate	readNestedSerializerSnapshots(DataInputView in, ClassLoader cl)	Reads the composite snapshot of all the contained serializers.
<T> TypeSerializerSchemaCompatibility<T>	resolveCompatibilityWithNested(TypeSerializerSchemaCompatibility<?> outerCompatibility, TypeSerializer<?>... newNestedSerializers)	Deprecated. this no method will be removed in the future.
void	writeNestedSerializerSnapshots(DataOutputView out)	Writes the composite snapshot of all the contained serializers.

Methods inherited from class java.lang.Object

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

Constructor Detail

NestedSerializersSnapshotDelegate

public NestedSerializersSnapshotDelegate(TypeSerializer<?>... serializers)

Constructor to create a snapshot for writing.

Method Detail

getRestoredNestedSerializers

public TypeSerializer<?>[] getRestoredNestedSerializers()

Produces a restore serializer from each contained serializer configuration snapshot. The serializers are returned in the same order as the snapshots are stored.

getRestoredNestedSerializer

public <T> TypeSerializer<T> getRestoredNestedSerializer(int pos)

Creates the restore serializer from the pos-th config snapshot.

getNestedSerializerSnapshots

public TypeSerializerSnapshot<?>[] getNestedSerializerSnapshots()

Returns the snapshots of the nested serializers.

Returns:

the snapshots of the nested serializers.

resolveCompatibilityWithNested

@Deprecated
public <T> TypeSerializerSchemaCompatibility<T> resolveCompatibilityWithNested(TypeSerializerSchemaCompatibility<?> outerCompatibility,
                                                                               TypeSerializer<?>... newNestedSerializers)

Deprecated.

this no method will be removed in the future. Resolving compatibility for nested serializers is now handled by CompositeTypeSerializerSnapshot.

Resolves the compatibility of the nested serializer snapshots with the nested serializers of the new outer serializer.

writeNestedSerializerSnapshots

public final void writeNestedSerializerSnapshots(DataOutputView out)
                                          throws IOException

Writes the composite snapshot of all the contained serializers.

Throws:

IOException

readNestedSerializerSnapshots

public static NestedSerializersSnapshotDelegate readNestedSerializerSnapshots(DataInputView in,
                                                                              ClassLoader cl)
                                                                       throws IOException

Reads the composite snapshot of all the contained serializers.

Throws:

IOException