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Add kotlin.serialization implementation of Serializer #338
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98 changes: 98 additions & 0 deletions
98
...in/src/main/kotlin/org/axonframework/extensions/kotlin/serialization/ArrayResponseType.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| package org.axonframework.extensions.kotlin.serialization | ||
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| import org.axonframework.common.ReflectionUtils | ||
| import org.axonframework.common.TypeReflectionUtils | ||
| import org.axonframework.messaging.responsetypes.AbstractResponseType | ||
| import org.axonframework.messaging.responsetypes.InstanceResponseType | ||
| import org.axonframework.messaging.responsetypes.ResponseType | ||
| import java.lang.reflect.Type | ||
| import java.util.concurrent.Future | ||
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| /** | ||
| * A [ResponseType] implementation that will match with query handlers which return a multiple instances of the | ||
| * expected response type. If matching succeeds, the [ResponseType.convert] function will be called, which | ||
| * will cast the query handler it's response to an [Array] with element type [E]. | ||
| * | ||
| * @param E The element type which will be matched against and converted to | ||
| * @author Gerard de Leeuw | ||
| * @see org.axonframework.messaging.responsetypes.MultipleInstancesResponseType | ||
| */ | ||
| class ArrayResponseType<E>(elementType: Class<E>) : AbstractResponseType<Array<E>>(elementType) { | ||
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| companion object { | ||
| /** | ||
| * Indicates that the response matches with the [Type] while returning an iterable result. | ||
| * | ||
| * @see ResponseType.MATCH | ||
| * | ||
| * @see ResponseType.NO_MATCH | ||
| */ | ||
| const val ITERABLE_MATCH = 1024 | ||
| } | ||
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| private val instanceResponseType: InstanceResponseType<E> = InstanceResponseType(elementType) | ||
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| /** | ||
| * Match the query handler's response [Type] with this implementation's [E]. | ||
| * Will return true in the following scenarios: | ||
| * | ||
| * * If the response type is an [Array] | ||
| * * If the response type is a [E] | ||
| * | ||
| * If there is no match at all, it will return false to indicate a non-match. | ||
| * | ||
| * @param responseType the response [Type] of the query handler which is matched against | ||
| * @return true for [Array] or [E] and [ResponseType.NO_MATCH] for non-matches | ||
| */ | ||
| override fun matches(responseType: Type): Boolean = | ||
| matchRank(responseType) > NO_MATCH | ||
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| /** | ||
| * Match the query handler's response [Type] with this implementation's [E]. | ||
| * Will return a value greater than 0 in the following scenarios: | ||
| * | ||
| * * [ITERABLE_MATCH]: If the response type is an [Array] | ||
| * * [ResponseType.MATCH]: If the response type is a [E] | ||
| * | ||
| * If there is no match at all, it will return [ResponseType.NO_MATCH] to indicate a non-match. | ||
| * | ||
| * @param responseType the response [Type] of the query handler which is matched against | ||
| * @return [ITERABLE_MATCH] for [Array], [ResponseType.MATCH] for [E] and [ResponseType.NO_MATCH] for non-matches | ||
| */ | ||
| override fun matchRank(responseType: Type): Int = when { | ||
| isMatchingArray(responseType) -> ITERABLE_MATCH | ||
| else -> instanceResponseType.matchRank(responseType) | ||
| } | ||
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| /** | ||
| * Converts the given [response] of type [Object] into an [Array] with element type [E] from | ||
| * this [ResponseType] instance. Should only be called if [ResponseType.matches] returns true. | ||
| * Will throw an [IllegalArgumentException] if the given response | ||
| * is not convertible to an [Array] of the expected response type. | ||
| * | ||
| * @param response the [Object] to convert into an [Array] with element type [E] | ||
| * @return an [Array] with element type [E], based on the given [response] | ||
| */ | ||
| override fun convert(response: Any): Array<E> { | ||
| val responseType: Class<*> = response.javaClass | ||
| if (responseType.isArray) { | ||
| @Suppress("UNCHECKED_CAST") | ||
| return response as Array<E> | ||
| } | ||
| throw IllegalArgumentException( | ||
| "Retrieved response [$responseType] is not convertible to an array with the expected element type [$expectedResponseType]" | ||
| ) | ||
| } | ||
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| @Suppress("UNCHECKED_CAST") | ||
| override fun responseMessagePayloadType(): Class<Array<E>> = | ||
| Array::class.java as Class<Array<E>> | ||
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| override fun toString(): String = "ArrayResponseType[$expectedResponseType]" | ||
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| private fun isMatchingArray(responseType: Type): Boolean { | ||
| val unwrapped = ReflectionUtils.unwrapIfType(responseType, Future::class.java) | ||
| val iterableType = TypeReflectionUtils.getExactSuperType(unwrapped, Array::class.java) | ||
| return iterableType != null && isParameterizedTypeOfExpectedType(iterableType) | ||
| } | ||
| } | ||
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