Package org.apache.flink.runtime.state

Class StateSnapshotTransformers.MapStateSnapshotTransformer<K,V>

java.lang.Object

org.apache.flink.runtime.state.StateSnapshotTransformers.MapStateSnapshotTransformer<K,V>

All Implemented Interfaces:

StateSnapshotTransformer<Map<K,V>>

Enclosing class:

StateSnapshotTransformers

public static class StateSnapshotTransformers.MapStateSnapshotTransformer<K,V>
extends Object
implements StateSnapshotTransformer<Map<K,V>>

General implementation of map state transformer.

This transformer wraps a transformer per-entry and transforms the whole map state.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.runtime.state.StateSnapshotTransformer

StateSnapshotTransformer.CollectionStateSnapshotTransformer<T>, StateSnapshotTransformer.StateSnapshotTransformFactory<T>

Constructor Summary

Constructors

Constructor	Description
MapStateSnapshotTransformer(StateSnapshotTransformer<V> entryValueTransformer)

Method Summary

Modifier and Type	Method	Description
Map<K,V>	filterOrTransform(Map<K,V> map)	Transform or filter out state values which are included or skipped in the snapshot.

Methods inherited from class java.lang.Object

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

Constructor Detail

MapStateSnapshotTransformer

public MapStateSnapshotTransformer(StateSnapshotTransformer<V> entryValueTransformer)

Method Detail

filterOrTransform

@Nullable
public Map<K,V> filterOrTransform(@Nullable
                                        Map<K,V> map)

Description copied from interface: StateSnapshotTransformer

Transform or filter out state values which are included or skipped in the snapshot.

Specified by:

filterOrTransform in interface StateSnapshotTransformer<K>

Parameters:

map - non-serialized form of value

Returns:

value to snapshot or null which means the entry is not included