'Cannot find implementation' for mapstruct mappers

[pumano]

I prepare repo: https://github.com/pumano/vscode-mapstruct-tests
just check via gradle clean test and then try to run via vscode.

You got java.lang.ExceptionInInitializerError which Caused by: java.lang.ClassNotFoundException: Cannot find implementation for com.example.vscode.mapstructdemo.mappers.ExampleMapper

looks like path to generated code not included to tests.

Also I link this issue with issue in redhat repo: redhat-developer/vscode-java#1660

[mrvigneshmca]

Can any one tel the answer for this. In my case implementation class got generated but its not able to detect the impl class while performing unit testing

[jdneo]

The annotation processing for Gradle projects were not supported when this issue is created. And that's why tests are failed.

But now it's supported upstream: eclipse-jdtls/eclipse.jdt.ls#2319.