Spring Properties: Can't inject values using complex SpEL

[Sgitario]

Describe the bug

Having this class:

@RestController
@RequestMapping("/values")
public class ValueController {

    @Value("${values.text}")
    String fieldUsingValue; // works

    @Value("${values.list}")
    String[] fieldUsingArray; // works

    @Value("#{'${values.list}'.split(',')}")
    List<String> fieldUsingList; // does not work

    @Value("#{${values.map}}")
    Map<String, String> fieldUsingMap; // does not work

   // ...
}

Note the SpEL expressions I checked and that according to the Spring documentation should work.
This is the application properties I'm using:

values.text=hello
values.list=A,B
values.map={key1: '1', key2: '2', key3: '3'}

Expected behavior

To be honest, I'm not sure how complex is to make the SpEL engine to work using the Quarkus configuration engine.
If this is too complex, I guess we should note this limitation in the Spring Properties guide.

Actual behavior

No response

How to Reproduce?

No response

Output of uname -a or ver

No response

Output of java -version

No response

GraalVM version (if different from Java)

No response

Quarkus version or git rev

No response

Build tool (ie. output of mvnw --version or gradlew --version)

No response

Additional information

No response

[quarkus-bot]

/cc @geoand

[geoand]

Thanks for reporting, but this is not something we plan to support given the complexity involved in implementing it and the niche use case it addresses.

At best, we can print an error message mentioning this.