implementing Jackson Serialization of Java 17 Sealed Interfaces in Spring Boot
I'm working on a Spring Boot application (version 2.6.0) using Java 17 where I have a sealed interface for different types of responses. However, when I try to serialize an instance of a class implementing this sealed interface to JSON using Jackson, I encounter a `com.fasterxml.jackson.databind.JsonMappingException`. The behavior message states: \n\n`want to construct instance of 'com.example.ResponseType' (no Creators, like default constructor, exist): want to deserialize from Object value (no delegate- or property-based Creator)`. \n\nHere's a simplified version of my code: \n\n```java\nsealed interface ResponseType permits SuccessResponse, ErrorResponse {\n String getMessage();\n}\n\nfinal class SuccessResponse implements ResponseType {\n private final String message;\n \n public SuccessResponse(String message) {\n this.message = message;\n }\n \n @Override\n public String getMessage() {\n return message;\n }\n}\n\nfinal class ErrorResponse implements ResponseType {\n private final String message;\n \n public ErrorResponse(String message) {\n this.message = message;\n }\n \n @Override\n public String getMessage() {\n return message;\n }\n}\n```\n\nIn my controller, I'm trying to return a response like this: \n\n```java\n@GetMapping("/response")\npublic ResponseType getResponse() {\n return new SuccessResponse("Operation successful!");\n}\n```\n\nI've also tried adding `@JsonCreator` and `@JsonProperty` annotations on the constructors of `SuccessResponse` and `ErrorResponse`, but that didn't resolve the scenario. Any insights on how to properly configure Jackson to handle serialization of Java 17 sealed interfaces? Is there a specific configuration I need to add, or am I missing something fundamental?