[FLINK-4645] Hard to register Kryo Serializers due to generics

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.1.2
• Fix Version/s: 1.2.0
• Assignee: Stephan Ewen
• Reporter: Stephan Ewen
• Created: 20/Sep/16 17:47
• Updated: 28/Feb/19 13:21
• Resolved: 21/Sep/16 15:55

Description

It currently does not work to do this:

env.registerTypeWithKryoSerializer(TreeMultimap.class, JavaSerializer.class);

instead on needs to do that:

env.registerTypeWithKryoSerializer(TreeMultimap.class, (Class<? extends Serializer<?>>) JavaSerializer.class);

The fix would be to change the signature of the environment method from

public void registerTypeWithKryoSerializer(Class<?> type, Class<? extends Serializer<?>> serializerClass)

to

public void registerTypeWithKryoSerializer(Class<?> type, Class<? extends Serializer> serializerClass)