Cannot parse map if the map contains 0 about jackson-dataformat-hocon HOT 2 OPEN

class FixedMapDeserializer : JsonDeserializer<Map<*, *>>() {
    override fun deserialize(p0: JsonParser, p1: DeserializationContext): Map<*, *> {
        val any = p0.readValueAsTree<TreeNode>()
        if (any.isArray) {
            val values = mutableMapOf<Any?, Any?>()
            repeat(any.size()) {
                values[it] = any.get(it)
             }
            return values
         } else {
             val values = mutableMapOf<Any?, Any?>()
             any.fieldNames().forEach {
                 values[it] = any.get(it)
             }
             return values
        }
    }
}

val module = SimpleModule()

module.setDeserializerModifier(object: BeanDeserializerModifier() {
      override fun modifyMapDeserializer(config: DeserializationConfig, type: MapType, beanDesc: BeanDescription, deserializer: JsonDeserializer<*>): JsonDeserializer<*> {
          return FixedMapDeserializer()
      }
})

mapper.registerModule(module)