Supporting JsonPointer? about moshi HOT 4 OPEN

class JsonPathFactory : JsonAdapter.Factory {
    override fun create(type: Type?, annotations: MutableSet<out Annotation>, moshi: Moshi): JsonAdapter<*>? {
        val jsonPathAnnotation = annotations.firstOrNull { it.annotationClass == JsonPath::class }
        if (jsonPathAnnotation != null) {
            val path = Proxy.getInvocationHandler(jsonPathAnnotation).invoke(jsonPathAnnotation, JsonPath::class.java.declaredMethods.first { it.name == "path" }, arrayOf()) as String
            return object : JsonAdapter<String>() {
                
                @JsonPath()
                override fun fromJson(reader: JsonReader): String? {
                        @Suppress("UNCHECKED_CAST")
                        val map = reader.readJsonValue() as Map<String, Any>
                        var currentNode = map
                        val pathSegments = path.split("/")
                        pathSegments.dropLast(1).forEach {
                            @Suppress("UNCHECKED_CAST")
                            currentNode = currentNode[it] as Map<String, Any>
                        }
                        return currentNode[pathSegments.last()] as String
                }

                override fun toJson(writer: JsonWriter?, @JsonPath value: String?) = Unit
            }
        }
        return null
    }
}


@Retention(AnnotationRetention.RUNTIME)
@JsonQualifier
annotation class JsonPath(val path: String = "")