[jira] [Created] (FLINK-11740) Ill-defined CompositeTypeSerializerSnapshot class signature

[Shang Yuanchun (Jira)]

Tzu-Li (Gordon) Tai created FLINK-11740:
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             Summary: Ill-defined CompositeTypeSerializerSnapshot class signature
                 Key: FLINK-11740
                 URL: https://issues.apache.org/jira/browse/FLINK-11740
             Project: Flink
          Issue Type: Improvement
          Components: Type Serialization System
            Reporter: Tzu-Li (Gordon) Tai
            Assignee: Tzu-Li (Gordon) Tai
             Fix For: 1.8.0


The class signature of {{CompositeTypeSerializerSnapshot}} allows subclasses to have raw types, while also requiring subclasses to erase types and re-cast when providing the expected serializer class in constructors.

The signature should be changed to as follows:
{code}
public abstract class CompositeTypeSerializerSnapshot<T, S extends TypeSerializer<T>> implements TypeSerializerSnapshot<T> { ... }
{code}



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