TisonKun created FLINK-12822: -------------------------------- Summary: Add explicit transformer from SerializableOptional to Optional Key: FLINK-12822 URL: https://issues.apache.org/jira/browse/FLINK-12822 Project: Flink Issue Type: Improvement Components: API / Type Serialization System Affects Versions: 1.9.0 Reporter: TisonKun Assignee: TisonKun Fix For: 1.9.0
We introduce {{SerializableOptional}} to represent return value that of {{Optional}} and transported cross network. The purpose is reasonable. However, a wart is inside {{SerializableOptional}}. Calling {{SerializableOptional#map}} will returns a {{Optional}}, which might surprise contributors if they want to chain operations and get a {{SerializableOptional}} as final result(to another transport maybe). Semantically return value of {{SerializableOptional#map}} should be {{SerializableOptional}}, and for interoperation, we could introduce a {{SerializableOptional#toOptional}} which easily adapt to the correct type. cc the original author [~till.rohrmann] -- This message was sent by Atlassian JIRA (v7.6.3#76005)