Hi does Kotlin serialisation have an equivalent fe...

# serialization

[Tower Guidev2]

Hi
does Kotlin serialisation have an equivalent feature to Jackson Json's

@JsonAnyGetter

    @JsonAnySetter

that can be employed to cope with any unexpected json message fields?

[Emil Kantis]

Are you interested in the unexpected fields? What do you want to do with them?

[Tower Guidev2]

i am interested in unexpected fields
i want to stop them crashing my mobile application when json parsing fails!
😄

[Emil Kantis]

You could write your own wrapper for decodeFromString which prints the value if decoding fails.

inline fun <reified T> Json.decodeOrThrow(s: String): T = runCatching {
  decodeFromString(d)
}.onFailure { t ->
  logger.error("Failed to parse <$s> to ${T::class.simpleName}", t)
}.getOrThrow()

[CLOVIS]

You can just configure the serializer to ignore everything it doesn't expect:

Json {
    ignoreUnknownKeys = true
}

[Tower Guidev2]

You can just configure the serializer to ignore everything it doesn't expect:
@CLOVIS I do not want to do that, or atleast not for all my api calls
my application has to conditionally fail fast when it encounters unexpected json fields

[CLOVIS]

I don't understand your problem then, "conditionally fail fast when it encounters unexpected json fields" is what ignoreUnknownKeys = false does. You don't need to do anything more.

[Tower Guidev2]

my application retrieves data from multiple remote servers
i use retrofit configured in hilt modules for all these calls
some of the remote services i need to fail fast
the remaining remore services need to be lenient and allow unexpected json fields
im looking for a simple solution to configuring this difference in behaviour

[CLOVIS]

Have a different Json instance for each remote server, with the configuration you want for that remote server.