[FLINK-6943] Improve exceptions within TypeExtractionUtils#getSingleAbstractMethod

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.4.0
• Assignee: Dawid Wysakowicz
• Reporter: Dawid Wysakowicz
• Created: 19/Jun/17 07:37
• Updated: 28/Feb/19 13:20
• Resolved: 25/Jun/17 06:55

Description

Exception message seems to be inexact.
Also if there is no SAM, sam would be null upon returning from the method.

The suggestion from a review was to change the message and add a check (for null sam) prior to returning.

Another suggestion is to check if the given method is an interface, as only for interface it is possible to pass lambda.

Issue Links

• links to: GitHub Pull Request #4140