Native reflection hints missing for nested properties declared in a superclass

[justin-tay]

Trying to configure the ssl bundle for the application which worked normally but failed when compiling to a graal native image.

The following is the sample configuration.

spring:
  ssl:
    bundle:
      jks:
        server:
          key:
            alias: my-key-alias
          keystore:
            location: file:my-keystore.p12
            type: PKCS12
          options:
            enabled-protocols:
            - TLSv1.2
            - TLSv1.3

The values under spring.ssl.bundle.jks.server.key and spring.ssl.bundle.jks.server.options are null in the native image.

When checking the generated reflect-config.json it looks like this is because no hints were generated for org.springframework.boot.autoconfigure.ssl.SslBundleProperties$Options and org.springframework.boot.autoconfigure.ssl.SslBundleProperties$Key.

I have created a simple reproducer at https://github.com/justin-tay/spring-boot-native-sslbundle-issue

The logs when run using mvn spring-boot:run is

2023-07-14T11:36:58.218+08:00  INFO 8892 --- [           main] com.example.demo.DemoConfiguration       : Bundle [server] Key Alias [my-key-alias]
2023-07-14T11:36:58.218+08:00  INFO 8892 --- [           main] com.example.demo.DemoConfiguration       : Bundle [server] Keystore Location [file:my-keystore.p12]
2023-07-14T11:36:58.218+08:00  INFO 8892 --- [           main] com.example.demo.DemoConfiguration       : Bundle [server] Options Enabled Protocols [[TLSv1.2, TLSv1.3]]

The logs when run after compiling to a native image is

2023-07-14T11:36:13.253+08:00  INFO 13908 --- [           main] com.example.demo.DemoConfiguration       : Bundle [server] Key Alias [null]
2023-07-14T11:36:13.253+08:00  INFO 13908 --- [           main] com.example.demo.DemoConfiguration       : Bundle [server] Keystore Location [file:my-keystore.p12]
2023-07-14T11:36:13.253+08:00  INFO 13908 --- [           main] com.example.demo.DemoConfiguration       : Bundle [server] Options Enabled Protocols [null]

[wilkinsona]

Thanks for the reproducer and initial analysis, @justin-tay. The problem affects any nested properties class that's declared in a superclass. SslBundleProperties and its two sub-classes JksSslBundleProperties and PemSslBundleProperties may be the only place where we have such an arrangement though.