文章/答案/技术大牛

发布

社区首页 >问答首页 >为大型数据类创建自定义序列化程序

问为大型数据类创建自定义序列化程序
EN

Stack Overflow用户

提问于 2022-07-17 13:33:03

回答 1查看 154关注 0票数 1

我有一个用于货币换算率响应的数据类。

我一直收到这个错误:拒绝调用、预期的76个参数寄存器、方法签名有78个或更多.

你可以在下面看到。( Conversion Rates类有超过160种货币)

我正在使用Ktor客户端，我的数据类如下所示：

@Entity(tableName = "exchange")
@Serializable
data class Exchange(
    val base_code: String,
    @Contextual
    val conversion_rates: ConversionRates,
    val documentation: String,
    val result: String,
    val terms_of_use: String,
    @PrimaryKey
    val time_last_update_unix: Int,
    val time_last_update_utc: String,
    val time_next_update_unix: Int,
    val time_next_update_utc: String
)

@Serializable
data class ConversionRates(
    val AED: Double,
    val AFN: Double,
    val ALL: Double,
    val AMD: Double,
    val ANG: Double,
    val AOA: Double,
    val ARS: Double,
    val AUD: Double,
    val AWG: Double,
    val AZN: Double,
    val BAM: Double,
    val BBD: Double,
    val BDT: Double,
    val BGN: Double,
...

失败，例外: com.example.testingxml.data.models.ConversionRates$$serializer: com.example.testingxml.data.models.ConversionRates com.example.testingxml.data.models.ConversionRates$$serializer.deserialize(kotlinx.serialization.encoding.Decoder)：验证器拒绝类java.lang.VerifyError无法验证: com.example.testingxml.data.models.ConversionRates com.example.testingxml.data.models.ConversionRates$$serializer.deserialize(kotlinx.serialization.encoding.Decoder)：0x10F0拒绝调用，预期有76个参数寄存器，方法签名有78或更多( 'com.example.testingxml.data.models.ConversionRates$$serializer‘声明出现在/data/data/com.example.testingxml/code_cache/.overlay/base.apk/classes7.dex) 2022-07-17 16:23:27.926 8855-8855 AndroidRuntime com.example.testingxml E致命异常: main )中。

我试着用hashmap/ TreeMap.这不起作用，因为科特林无法对此做出反应。

有解决办法吗？

更新我得到的Json响应

{
 "result":"success",
 "documentation":"https://www.exchangerate-api.com/docs",
 "terms_of_use":"https://www.exchangerate-api.com/terms",
 "time_last_update_unix":1658016002,
 "time_last_update_utc":"Sun, 17 Jul 2022 00:00:02 +0000",
 "time_next_update_unix":1658102402,
 "time_next_update_utc":"Mon, 18 Jul 2022 00:00:02 +0000",
 "base_code":"USD",
 "conversion_rates":{
  "USD":1,
  "AED":3.6725,
  "AFN":87.9897,
  "ALL":116.9156,
  "AMD":413.3227,
  "ANG":1.7900,
  "AOA":431.4219,
  "ARS":127.5711,
  "AUD":1.4762,
  "AWG":1.7900,
  "AZN":1.6932,
  "BAM":1.9426,
  "BBD":2.0000,
  "BDT":93.1628,
  "BGN":1.9427,
  "BHD":0.3760,
  "BIF":2032.0309,
  "BMD":1.0000,
  "BND":1.3978,
  "BOB":6.8633,
  "BRL":5.4199,
  "BSD":1.0000,
  "BTN":79.8199,
  "BWP":12.8324,
  "BYN":2.8230,
  "BZD":2.0000,
  "CAD":1.3050,
  "CDF":1988.6057,
  "CHF":0.9782,
  "CLP":1047.4250,
  "CNY":6.7686,
  "COP":4573.0573,
  "CRC":686.8741,
  "CUP":24.0000,
  "CVE":109.5198,
  "CZK":24.2810,
  "DJF":177.7210,
  "DKK":7.4100,
  "DOP":54.7252,
  "DZD":147.0795,
  "EGP":18.8746,
  "ERN":15.0000,
  "ETB":51.8192,
  "EUR":0.9932,
  "FJD":2.2271,
  "FKP":0.8452,
  "FOK":7.4100,
  "GBP":0.8452,
  "GEL":2.8469,
  "GGP":0.8452,
  "GHS":8.3242,
  "GIP":0.8452,
  "GMD":53.9357,
  "GNF":8643.2884,
  "GTQ":7.7432,
  "GYD":208.4165,
  "HKD":7.8518,
  "HNL":24.5589,
  "HRK":7.4836,
  "HTG":114.4866,
  "HUF":398.6438,
  "IDR":14976.7866,
  "ILS":3.4749,
  "IMP":0.8452,
  "INR":79.8209,
  "IQD":1454.0600,
  "IRR":42056.7004,
  "ISK":138.3686,
  "JEP":0.8452,
  "JMD":151.4748,
  "JOD":0.7090,
  "JPY":138.7800,
  "KES":117.9526,
  "KGS":81.3321,
  "KHR":4065.7093,
  "KID":1.4762,
  "KMF":488.6430,
  "KRW":1321.7446,
  "KWD":0.2996,
  "KYD":0.8333,
  "KZT":480.8824,
  "LAK":16868.6002,
  "LBP":1507.5000,
  "LKR":356.0525,
  "LRD":152.3277,
  "LSL":17.0698,
  "LYD":4.8552,
  "MAD":9.9367,
  "MDL":19.3046,
  "MGA":4084.1272,
  "MKD":61.1373,
  "MMK":1834.4490,
  "MNT":3130.7286,
  "MOP":8.0873,
  "MRU":36.7687,
  "MUR":44.7852,
  "MVR":15.4430,
  "MWK":1033.6225,
  "MXN":20.6318,
  "MYR":4.4398,
  "MZN":64.4837,
  "NAD":17.0698,
  "NGN":413.4387,
  "NIO":35.8600,
  "NOK":10.1891,
  "NPR":127.7119,
  "NZD":1.6266,
  "OMR":0.3845,
  "PAB":1.0000,
  "PEN":3.9116,
  "PGK":3.5170,
  "PHP":56.3397,
  "PKR":209.4856,
  "PLN":4.7442,
  "PYG":6855.2462,
  "QAR":3.6400,
  "RON":4.8888,
  "RSD":116.5282,
  "RUB":57.7811,
  "RWF":1058.9331,
  "SAR":3.7500,
  "SBD":8.0297,
  "SCR":13.0412,
  "SDG":461.6883,
  "SEK":10.5059,
  "SGD":1.3978,
  "SHP":0.8452,
  "SLE":13.6370,
  "SLL":13636.9704,
  "SOS":576.2883,
  "SRD":22.3936,
  "SSP":544.8830,
  "STN":24.3344,
  "SYP":2526.6716,
  "SZL":17.0698,
  "THB":36.6993,
  "TJS":10.4715,
  "TMT":3.4981,
  "TND":2.8755,
  "TOP":2.3438,
  "TRY":17.4168,
  "TTD":6.7612,
  "TVD":1.4762,
  "TWD":29.8712,
  "TZS":2320.8657,
  "UAH":31.0508,
  "UGX":3768.5019,
  "UYU":40.3063,
  "UZS":10908.3372,
  "VES":5.6990,
  "VND":23432.6566,
  "VUV":119.1620,
  "WST":2.7261,
  "XAF":651.5240,
  "XCD":2.7000,
  "XDR":0.7635,
  "XOF":651.5240,
  "XPF":118.5255,
  "YER":249.9997,
  "ZAR":17.0702,
  "ZMW":16.4457,
  "ZWL":395.1049
 }
}

产生错误的行。

_exchangeRates.emit((it.data as Exchange).conversion_rates.toConversionItem())

我所犯的错误

com.example.testingxml.util.status.NetworkRequest$Success :无法转换为com.example.testingxml.data.models.Exchange java.lang.VerifyError:验证器拒绝了类com.example.testingxml.data.models.ConversionRates$$serializer: com.example.testingxml.data.models.ConversionRates com.example.testingxml.data.models.ConversionRates$$serializer.deserialize(kotlinx.serialization.encoding.Decoder)，无法验证: com.example.testingxml.data.models.ConversionRates com.example.testingxml.data.models.ConversionRates$$serializer.deserialize(kotlinx.serialization.encoding.Decoder)：0x10F0拒绝调用，预期的76个参数寄存器，方法签名有78个或更多( 'com.example.testingxml.data.models.ConversionRates$$serializer‘的声明出现在/data/data/com.example.testingxml/code_cache/.overlay/base.apk/classes7.dex)中无法删除dir '/data/data/com.example.testingxml/code_cache/.ll/'：没有这样的文件或目录

更新2

我的Ktor客户：

object Client {

    val client = HttpClient(Android) {
        install(Logging) {

            logger = object : Logger {
                override fun log(message: String) {
                    Log.d(KTOR_CLIENT_LOGGER, message)
                }
            }
            level = LogLevel.ALL
        }
        install(ContentNegotiation) {
            val converter = KotlinxSerializationConverter(Json {
                ignoreUnknownKeys = true
                prettyPrint = true
                isLenient = true
            })
            register(Json, converter)
            register(ContentType.Application.OctetStream, converter)
        }

        engine {
            socketTimeout = KTOR_TIMEOUT
            connectTimeout = KTOR_TIMEOUT
            sslManager = { HttpsURLConnection ->
                HttpsURLConnection.sslSocketFactory = SslSettings.getSslContext()!!.socketFactory
            }
        }
        defaultRequest {
            contentType(Json)
        }
    }
}

我的储藏室

 override fun getAllFromApi(mainCurrency: String): Flow<RepositoryStatus> = flow {
        currencyApi.getCurrencyRate(mainCurrency).collect {networkRequest ->
            when (networkRequest) {
                is NetworkRequest.Failure -> emit(RepositoryStatus.Failure(networkRequest.error))
                is NetworkRequest.Success<*> -> emit(RepositoryStatus.Success(networkRequest))
            }
        }

    }.flowOn(Dispatchers.IO)

我的阿皮

  override fun getCurrencyRate(mainCurrency: String): Flow<NetworkRequest> = flow {
        try {
            val result = client.get(Routes.Api.url.plus(mainCurrency))
            if (result.status == HttpStatusCode.OK) emit(NetworkRequest.Success(result.body<Exchange>()))
             else emit(NetworkRequest.Failure(result.toString()))
        }  catch  (e: ClientRequestException) {
            emit(NetworkRequest.Failure(e.message))
        } catch (e: ServerResponseException) {
            emit(NetworkRequest.Failure(e.message))
        } catch (e: IOException) {
            emit(NetworkRequest.Failure(e.localizedMessage!!))
        } catch (e: SerializationException) {
            emit(NetworkRequest.Failure(e.localizedMessage!!))
        }
    }.flowOn(Dispatchers.IO)

serialization

ktor-client

android

json

kotlin

回答 1

Stack Overflow用户

回答已采纳

发布于 2022-07-17 14:25:15

有一个已知臭虫，它具有自动序列化例程支持的最大字段数。

假设您有一个大型数据类(超过250个条目)来表示容器类中的嵌套对象(就像您拥有的那样)：

@Serializable
data class LargeData(
    val x1: String,
    val x2: String,
    val x3: String,
    val x4: String,
    //...
    val x258: String,
    val x259: String,
    val x260: String,
)

@Serializable
data class Container(
    val name: String,
    val rates: LargeData
)

当您尝试序列化/反序列化它时，会出现一个关于参数太多的错误。为了绕过它，您只需将数据存储在地图中，就可以处理无限的条目。

@Serializable
data class Container(
    val name: String,
    val rates: Map<String,Double>
)

在您的示例中，您只需将大型ConversionRates数据类转换为一个映射，如下所示：

@Serializable
data class Exchange(
    val base_code: String,
    val conversion_rates: Map<String,Double>, // change this line, and remove the ConversionRates data class
    val documentation: String,
    val result: String,
    val terms_of_use: String,
    @PrimaryKey
    val time_last_update_unix: Int,
    val time_last_update_utc: String,
    val time_next_update_unix: Int,
    val time_next_update_utc: String
)

如果您想将JSON部件与应用程序的其余部分隔离开来，您可以添加一个单元测试，它只接受一个JSON字符串，并检查它是否可以反序列化它

class JSONUnitTest {
    private val testJson = "{\"name\":\"some name\"}"

    @Test
    fun testJson()  {
        val t2 = Json.decodeFromString<Exchange>(testJson)
        println(t2)
    }
}

票数 1

页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://stackoverflow.com/questions/73012212

复制

相似问题

问为大型数据类创建自定义序列化程序
EN

回答 1

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问为大型数据类创建自定义序列化程序EN

回答 1

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问为大型数据类创建自定义序列化程序
EN