如何在 Kotlin 中处理 Cognito 身份提供商异常

Question

我正在使用 AWS SDK 设置 Cognito（无放大）。 我注意到，当发生某些情况时，我的 try/catch

Exception

类型无法捕获 AWS 特定的

Exception

类型。

如何在一个 catch 块中雄辩地捕获 AWS 的所有异常？

下面是一些示例代码，理想情况下我想在一个块中捕获所有 Cognito 特定异常：

    AuthenticationScreenState.REGISTER_VALIDATION -> {
      try {
        // confirm account request
        confirmSignUp()

        setScreenVisibility(false)
        delay(300)

        screenStateTo(AuthenticationScreenState.VALIDATION_COMPLETE)

      }catch(e: UsernameExistsException){
        setAuthenticationErrorMessage(e.message)
      }
      catch(e: NotAuthorizedException){
        setAuthenticationErrorMessage(e.message)
      }
      catch(e: ExpiredCodeException){
        setAuthenticationErrorMessage(e.message)
      }
      catch(e: Exception){
        Log.d("Exception", e.message.toString())
        setAuthenticationErrorMessage(e.message)
      }
    }

现在，看看他们的模型，他们有多个继承自

CognitoIdentityProviderException(builder.message) 

的异常情况。我在下面粘贴了异常片段的示例。

   //Exception snippet from aws.sdk.kotlin.services.cognitoIdentityprovider -> model

  public class ExpiredCodeException private constructor(builder: Builder) : CognitoIdentityProviderException(builder.message) {

    init {
        sdkErrorMetadata.attributes[ServiceErrorMetadata.ErrorType] = ErrorType.Client
    }

    public companion object {
        public operator fun invoke(block: Builder.() -> kotlin.Unit): aws.sdk.kotlin.services.cognitoidentityprovider.model.ExpiredCodeException = Builder().apply(block).build()
    }

    override fun toString(): kotlin.String = buildString {
        append("ExpiredCodeException(")
        append("message=$message")
        append(")")
    }

    override fun hashCode(): kotlin.Int {
        var result = message?.hashCode() ?: 0
        return result
    }

    override fun equals(other: kotlin.Any?): kotlin.Boolean {
        if (this === other) return true
        if (other == null || this::class != other::class) return false

        other as ExpiredCodeException

        if (message != other.message) return false

        return true
    }

    public inline fun copy(block: Builder.() -> kotlin.Unit = {}): aws.sdk.kotlin.services.cognitoidentityprovider.model.ExpiredCodeException = Builder(this).apply(block).build()

    @SdkDsl
    public class Builder {
        /**
         * The message returned when the expired code exception is thrown.
         */
        public var message: kotlin.String? = null

        @PublishedApi
        internal constructor()
        @PublishedApi
        internal constructor(x: aws.sdk.kotlin.services.cognitoidentityprovider.model.ExpiredCodeException) : this() {
            this.message = x.message
        }

        @PublishedApi
        internal fun build(): aws.sdk.kotlin.services.cognitoidentityprovider.model.ExpiredCodeException = ExpiredCodeException(this)

        internal fun correctErrors(): Builder {
            return this
        }
    }
}

我尝试添加此代码片段，但它似乎无法推断所有子异常的父类型。

catch(e: CognitoIdentityProviderException){
  Log.d("CognitoProviderException", e.message)
  setAuthenticationErrorMessage(e.message)
}

Answer 1

找到了一种方法来做到这一点：将继续测试，但我使用了以下代码，它似乎有效。

      }catch (e: CognitoIdentityProviderException) {
        val exceptionName = e::class.simpleName
        Log.d("Exception", exceptionName.toString() + e.message)
        setAuthenticationErrorMessage("$exceptionName: ${e.message}")
      }