[FLINK-20156] JavaDocs of WatermarkStrategy.withTimestampAssigner are wrong wrt Java 8

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.11.2, 1.12.0
• Fix Version/s: 1.11.3, 1.12.0
• Component/s: API / DataStream, Documentation
• Labels: pull-request-available usability
• Assignee: Till Rohrmann
• Reporter: Till Rohrmann
• Created: 13/Nov/20 16:07
• Updated: 13/Apr/21 20:41
• Resolved: 16/Nov/20 10:32

Description

According to the JavaDocs of WatermarkStrategy.withTimestampAssigner one can define a watermark strategy with the following code:

WatermarkStrategy<CustomObject> wmStrategy = WatermarkStrategy
	 .forMonotonousTimestamps()
	 .withTimestampAssigner((event, timestamp) -> event.getTimestamp());

However because of https://e.printstacktrace.blog/java-type-inference-generic-methods-chain-call/, this won't compile.

Issue Links

• links to: GitHub Pull Request #14069