[
https://issues.apache.org/jira/browse/GROOVY-7204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16470028#comment-16470028
]
ASF GitHub Bot commented on GROOVY-7204:
----------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/groovy/pull/699
> Static type checking and compilation fail when multiple generics in use
> -----------------------------------------------------------------------
>
> Key: GROOVY-7204
> URL: https://issues.apache.org/jira/browse/GROOVY-7204
> Project: Groovy
> Issue Type: Bug
> Components: Static compilation, Static Type Checker
> Affects Versions: 2.3.8
> Reporter: Mauro Molinari
> Priority: Critical
>
> Consider the following interfaces:
> {code:title=CrudRepository.java}
> package f;
> import java.io.Serializable;
> public interface CrudRepository<T, S extends Serializable> {
> void delete(S arg);
> void delete(T arg);
> }
> {code}
> {code:title=MyRepository.java}
> package f;
> public interface MyRepository extends CrudRepository<String, Long> {
> }
> {code}
> The following implementation class:
> {code:title=MyRepositoryImpl.java}
> package f;
> public class MyRepositoryImpl implements MyRepository {
> @Override
> public void delete(String arg) {
> System.out.println("String");
> }
> @Override
> public void delete(Long arg) {
> System.out.println("Long");
> }
> }
> {code}
> And the following Groovy class:
> {code:title=MyClass.groovy}
> package f
> import groovy.transform.CompileStatic;
> import groovy.transform.TypeChecked;
> @TypeChecked
> class MyClass {
> static MyRepository factory() {
> return new MyRepositoryImpl()
> }
>
> static void main(String[] args) {
> MyRepository r = factory()
> r.delete('foo')
> }
> }
> {code}
> Static type checking returns the following error:
> {noformat}
> MyClass.groovy: 15: [Static type checking] - Cannot call
> f.MyRepository#delete(S) with arguments [java.lang.String]
> {noformat}
> The same applies if you use {{@CompileStatic}} instead of {{@TypeChecked}}.
> Note that if, In the previous code, you change the method {{main}} by
> replacing:
> {code}
> MyRepository r = factory()
> {code}
> with:
> {code}
> MyRepository r = new MyRepositoryImpl()
> {code}
> compilation succeeds. However in real code this might not be possible (the
> {{MyRepository}} instance may be injected and auto-generated, think of Spring
> Data for instance).
> The only workaround is (yet again...) to disable static type checking and
> static compilation.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
