使用com.fasterxml.jackson.databind.ObjectMapper反序列化期间发生Invalid

Question

我正在尝试使用com.fasterxml.jackson.databind反序列化对象，方法如下：

val restoredProject = validationSessionHelperImpl.objectMapper2.readValue<com.fmetric.validation.api.Project>(validationData.projectJSON!!)

此处显示详细代码https://gist.github.com/iva-nova-e-katerina/f09cce0ade8a9b9a69ab9b52cbb1b0ea并得到以下错误：

com.fasterxml.jackson.databind.exc.InvalidTypeIdException: Could not resolve type id 'java.util.ArrayList' as a subtype of `java.util.List<com.fmetric.regulation.api.data.property.PropertyType>`: Configured `PolymorphicTypeValidator` (of type `com.fasterxml.jackson.databind.jsontype.BasicPolymorphicTypeValidator`) denied resolution
at [Source: (StringReader); line: 1, column: 237] (through reference chain: com.fmetric.validation.api.Project["rootBrick"]->com.fmetric.validation.api.Brick["type"]->com.fmetric.regulation.api.data.brick.BrickTypeFull["propertyTypes"])
at com.fasterxml.jackson.databind.exc.InvalidTypeIdException.from(InvalidTypeIdException.java:43)
at

源JSON字符串在这里https://gist.github.com/iva-nova-e-katerina/fa5ce8ddb03fb9db2b0dde930a6dbd5d

我必须告诉你一些关于类层次结构的事情

data class Brick(
val id: UUID?,
val name: String,
val type: BrickType,
val propertyValues: List<ProjectBrickPropertyValue<*>>,
)
open class BrickType(
open val id: UUID?,
open val name: String?
) 
class BrickTypeFull(
id: UUID?,
name: String?,
val propertyTypes: List<PropertyType>?
) : BrickType (id,name){

这个问题与我的另一个问题有关https://stackoverflow.com/questions/71339282/unrecognizedpropertyexception-during-deserialization-with-com-fasterxml-jackson

您能帮我序列化/反序列化与继承类型BrickTypeFull的对象聚合的对象吗？

Answer 1

下面是一个完整的示例

package com.example
import com.fasterxml.jackson.annotation.JsonIgnoreProperties
import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.databind.annotation.JsonDeserialize
import com.fasterxml.jackson.databind.jsontype.BasicPolymorphicTypeValidator
import com.fasterxml.jackson.module.kotlin.KotlinModule
import java.util.*
const val payload: String = """
{
"id":"f0156c1d-238b-4cfa-a5ba-17a3e2c9dc55",
"name":"Здание",
"type":["com.example.BrickTypeFull",{
"id":"24073daa-4193-4f16-bed2-d8ef226a8715",
"name":"Здание",
"propertyTypes":["java.util.ArrayList",[
{"id":"ed4e58f5-722e-4752-bf24-1b34dc5fdcd5","category":"BOOLEAN","name":"Cтатус архитектурного памятника","description":"Статус архитектурного памятника","brickTypeId":"24073daa-4193-4f16-bed2-d8ef226a8715","regulationId":null,"dictionaryValueId":null,"options":null},
{"id":"ed4e58f5-722e-4752-bf24-1b34dc5fdcd5","category":"BOOLEAN","name":"Cтатус архитектурного памятника","description":"Статус архитектурного памятника","brickTypeId":"24073daa-4193-4f16-bed2-d8ef226a8715","regulationId":null,"dictionaryValueId":null,"options":null}
]]
}]
}
"""
data class Brick(
val id: UUID?,
val name: String,
val type: BrickType,
)
open class BrickType(
open val id: UUID?,
open val name: String?
)
class BrickTypeFull(
id: UUID?,
name: String?,
val propertyTypes: List<PropertyType>?
) : BrickType(id, name)
@JsonIgnoreProperties(ignoreUnknown = true)
data class PropertyType(
val id: UUID,
val category: String,
val name: String,
val description: String,
val brickTypeId: UUID,
val regulationId: UUID?,
val dictionaryValueId: UUID?,
)
fun main(args: Array<String>) {
ObjectMapper().apply {
registerModule(KotlinModule.Builder().build())
activateDefaultTyping(
BasicPolymorphicTypeValidator.builder()
.allowIfSubType("com.example")
.allowIfSubType("java.util.ArrayList")
.build(),
ObjectMapper.DefaultTyping.NON_FINAL
)
}.also {
val result = it.readerFor(Brick::class.java).readValue<Brick>(payload)
println((result.type as BrickTypeFull).propertyTypes?.get(0))
}
}

可能您忘记将.allowIfSubType("java.util.ArrayList")添加到您的取消序列化程序中。

Answer 2

反序列化适用于以下验证器

val ptv: PolymorphicTypeValidator = BasicPolymorphicTypeValidator.builder()
.allowIfSubType("com.fmetric.regulation.api.data.brick")
.allowIfSubType("java.util.ArrayList")
.build()