Is it possible to get entity filled with example field values?

[Jaraxxuss]

I want retrieve a new User(101L, "Alice Johnson") from Java class is there anything existing api for it?
Is there also something similiar for JsonSubTypes?

public class User {
    @Schema(description = "Unique ID of the user", example = "101")
    private Long id;

    @Schema(description = "Full name of the user", example = "Alice Johnson")
    private String name;
}

[Mattias-Sehlstedt]

It is unclear what you are asking for/about. Please add further details regarding what you are after

[Jaraxxuss]

Hello @Mattias-Sehlstedt, i think it maybe related to the swagger, but anyway imagine i have a User class with @Schema or even without it, in swagger ui we can see the response/request example in json, is it possible in java code get the same request/reponse examples with type of Class (User for example)

var user = swaggerApi.getRequestExample();
user.equals(new User(101L, "Alice Johnson"))

[Mattias-Sehlstedt]

Yes this is most likely a question for swagger-core. But given that these annotations are mainly read during runtime, I do not see how they would easily provide the possibility to create valid Java instances. There is also nothing that forces a user to align the @Schema annotation with the actual Java type, e.g., you can have:

public class User {
    @Schema(description = "Number as Roman numeral", example = "IV", type = "string")
    private int id;

    @Schema(description = "Full name of the user", example = "Alice Johnson")
    private String name;
}

This makes absolutely no sense from your perspective, since new User("IV", "Alice Johnson") will not work. But it is completely valid from a REST-application context, since it all depends on how you have configured your deserializer for the object.

[Jaraxxuss]

@Mattias-Sehlstedt thanks for your's response. Yes, look's like it not possible.

My main goal is that i want to make a frontend dynamic and make an api which returns all possible JsonSubtypes values, and foreach subtype front end is creating a required form with inputs. I didn't find anything in web, and wan't to check all before implementing own "bicycle"

[Jaraxxuss]

@Mattias-Sehlstedt Oh, actually i managed to find it,
Schema is even better, dont need to use dummy example values
https://github.com/victools/jsonschema-generator