Missing configuration metadata in Gateway MVC

[ThomasVitale]

Describe the bug

The configuration properties in the spring.cloud.gateway.mvc.routes-map group are missing metadata, resulting in IDEs not being able to validate values or suggest completions. It looks like something related to the fact that it's defined as a Map and includes an object which is defined in another class, not nested. The latter scenario would be typically solved with the @NestedConfigurationProperty annotation, but it doesn't support Maps. On the other hand, the spring.cloud.gateway.mvc.routes group (defined as a List) comes with the right metadata.

A possible solution would be to add the metadata explicitly in a additional-spring-configuration-metadata.json file. I'm not sure if there's some way in Spring Boot to support this scenario automatically via the Configuration Processor.

[spencergibb]

Let me ask the boot folks

[spencergibb]

After chatting with @snicoll (assuming you're using IntelliJ) there is likely a bug in IntelliJ.

Adding this code to any project and the spring-boot-configuration-processor and I get completion.

@Component
@ConfigurationProperties(prefix = "my.test")
public class MyConfigProperties {

	private final Map<String, RouteProperties> routes = new LinkedHashMap<>();

	public Map<String, RouteProperties> getRoutes() {
		return this.routes;
	}

}