spring ide not working with nested @ConstructorBinding when not an inner class

Version: Spring IDE 4.5.0.RELEASE

I’m using Spring Boot 2.2.2 I have the following @ConfigurationProperties setup with @ConstructorBinding which works great during runtime but the IDE fails to auto complete. Any ideas?

package test;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.ConstructorBinding;

@ConfigurationProperties(prefix = "someConfig")
public class ConfigProperties {

  @ConstructorBinding
  public ConfigProperties(NestedConfigProperties nested, NestedConfigProperties nested2) {}
}

package test;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.ConstructorBinding;

@ConfigurationProperties
public class NestedConfigProperties {

  @ConstructorBinding
  public NestedConfigProperties(String dude) {}

  public String getBob() {
    return null;
  }

  public void setBob(String dude) {}
}

I would expect to see “dude” as an option. Instead I get an error.

Oddly enough the IDE seems to like bob in this case even though it doesn’t exist in the configuration metadata.

This is what the configuration metadata looks like:

{
  "groups": [
    {
      "name": "",
      "type": "test.NestedConfigProperties",
      "sourceType": "test.NestedConfigProperties"
    },
    {
      "name": "someConfig",
      "type": "test.ConfigProperties",
      "sourceType": "test.ConfigProperties"
    }
  ],
  "properties": [
    {
      "name": "dude",
      "type": "java.lang.String",
      "sourceType": "test.NestedConfigProperties"
    },
    {
      "name": "someConfig.nested",
      "type": "test.NestedConfigProperties",
      "sourceType": "test.ConfigProperties"
    },
    {
      "name": "someConfig.nested2",
      "type": "test.NestedConfigProperties",
      "sourceType": "test.ConfigProperties"
    }
  ],
  "hints": []
}

[kdvolder]

Martin suggested we can still merge it in last minute if it is ‘low risk’. So… Okay, I think its low-impact and low-risk. The extra code just handles an extra case (when it sees specific annotation on a type). So its merged now.

[kdvolder]

This didn’t make it yet into the next release. But the fix is in a branch waiting to be merged right after.

Branch: https://github.com/spring-projects/sts4/tree/gh_404