[Kotlin] ForyJsonException occurs when integrating ForyJsonKotlin with Spring

[li-fcb1899]

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• I had searched in the issues and found no similar issues.

Version

fory-json-kotlin 1.7.3
OS: Windows 11 25H2
Jdk 26.0.2.1
Kotlin 2.4.20

Component(s)

Java, Other

Minimal reproduce step

Result wrapper class:

data class Rt<T>(val flag: Boolean, val data: T? = null, val msg: String? = null)

fun <T> success(data: T): Rt<T> = Rt(true, data)

When using AbstractHttpMessageConverter, an error is reported: ForyJsonException: Unresolved Kotlin JSON type parameter 0

@Configuration
class WebConfig : WebMvcConfigurer {
    @get:Bean
    val foryJson: ForyJson = ForyJsonKotlin.builder().registerMixin<WithDetailMixin>().writeLongAsString(true)
        .defaultPropertyInclusion(NON_EMPTY).build()

    override fun configureMessageConverters(builder: HttpMessageConverters.ServerBuilder) {
        builder.withJsonConverter(
            object : AbstractHttpMessageConverter<Any>(APPLICATION_JSON) {
                override fun supports(clazz: Class<*>): Boolean = true
                override fun readInternal(clazz: Class<out Any>, inputMessage: HttpInputMessage): Any =
                    foryJson.fromJson(inputMessage.body.readAllBytes(), clazz)

                override fun writeInternal(t: Any, outputMessage: HttpOutputMessage) =
                    foryJson.writeJsonTo(t, outputMessage.body)
            })
    }
}

When using AbstractGenericHttpMessageConverter, an error is reported: ForyJsonException: Platform-typed Kotlin JSON occurrence java.util.List<com.reggie.entity.Employee> is unsupported

    override fun configureMessageConverters(builder: HttpMessageConverters.ServerBuilder) {
        builder.withJsonConverter(
            object : AbstractGenericHttpMessageConverter<Any>(APPLICATION_JSON) {
                override fun supports(clazz: Class<*>): Boolean = true
                override fun readInternal(clazz: Class<out Any>, inputMessage: HttpInputMessage): Any =
                    foryJson.fromJson(inputMessage.body.readAllBytes(), clazz)

                override fun writeInternal(t: Any, type: Type?, outputMessage: HttpOutputMessage) =
                    foryJson.writeJsonTo(t, TypeRef.of(type), outputMessage.body)

                override fun read(type: Type, contextClass: Class<*>?, inputMessage: HttpInputMessage): Any =
                    foryJson.fromJson(inputMessage.body.readAllBytes(), TypeRef.of(type))
            })

In the subclass methods of HttpMessageConverter, I don't know how to use jsonTypeRef<T>().
However, using only ForyJson for construction can achieve normal serialization.

What did you expect to see?

Serialize Rt<List> to JSON.

What did you see instead?

Constructed only using ForyJson.

@get:Bean
    val foryJson: ForyJson = ForyJson.builder().registerMixin<WithDetailMixin>().writeLongAsString(true)
        .defaultPropertyInclusion(NON_EMPTY).build()

Anything Else?

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!

[chaokunyang]

Hi @li-fcb1899 , thanks for reporting this issue, does #4054 resolve this issue?