Regression: GenericTypeResolver returns null for partially resolvable type arguments [SPR-11763]

[spring-projects-issues]

Oliver Drotbohm opened SPR-11763 and commented

Assume the following types:

interface Repository<T, ID extends Serializable> {}

interface IdFixingRepository<T> extends Repository<T, Long> {}

Trying to resolve the type arguments of IdFixingRepository using GenericTypeResolver returns null on Spring 4, works fine with latest 3.2.8. The test below fails starting with version 4.0.

asserNotNull(GenericTypeResolver.resolveTypeArguments(IdFixingRepository.class, Repository.class));

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Affects: 4.0.4

Issue Links:

• DATACMNS-501 ID type not detected for intermediate repository interface
• GenericTypeResolver.resolveTypeArguments(…) returns Object for raw types [SPR-11052] #15679 GenericTypeResolver.resolveTypeArguments(…) returns Object for raw types

Referenced from: commits bea34ea, fccec21

[spring-projects-issues]

Juergen Hoeller commented

This is a consequence of the fix for #15679 which turns out to be incomplete in aligning with 3.2.x's behavior. Completed for 4.0.5 now.

Juergen