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Support nullable Kotlin value class arguments

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This commit refines WebMVC and WebFlux argument resolution in order to
convert properly Kotlin value class arguments by using the type of the
value instead of the type of the value class.

Closes gh-32353
This commit is contained in:
Sébastien Deleuze
2024-03-01 14:44:37 +01:00
parent de828e9764
commit 227e75dae4
4 changed files with 78 additions and 16 deletions
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38
spring-web/src/test/kotlin/org/springframework/web/method/annotation/RequestParamMethodArgumentResolverKotlinTests.kt
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2023 the original author or authors.
* Copyright 2002-2024 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -25,7 +25,6 @@ import org.springframework.core.annotation.SynthesizingMethodParameter
import org.springframework.core.convert.support.DefaultConversionService
import org.springframework.http.HttpMethod
import org.springframework.http.MediaType
import org.springframework.util.ReflectionUtils
import org.springframework.web.bind.MissingServletRequestParameterException
import org.springframework.web.bind.annotation.RequestParam
import org.springframework.web.bind.support.ConfigurableWebBindingInitializer
@@ -39,6 +38,7 @@ import org.springframework.web.testfixture.servlet.MockHttpServletRequest
import org.springframework.web.testfixture.servlet.MockHttpServletResponse
import org.springframework.web.testfixture.servlet.MockMultipartFile
import org.springframework.web.testfixture.servlet.MockMultipartHttpServletRequest
import kotlin.reflect.jvm.javaMethod
/**
* Kotlin test fixture for [RequestParamMethodArgumentResolver].
@@ -70,6 +70,9 @@ class RequestParamMethodArgumentResolverKotlinTests {
lateinit var nonNullableMultipartParamRequired: MethodParameter
lateinit var nonNullableMultipartParamNotRequired: MethodParameter
lateinit var nonNullableValueClassParam: MethodParameter
lateinit var nullableValueClassParam: MethodParameter
@BeforeEach
fun setup() {
@@ -80,10 +83,8 @@ class RequestParamMethodArgumentResolverKotlinTests {
binderFactory = DefaultDataBinderFactory(initializer)
webRequest = ServletWebRequest(request, MockHttpServletResponse())
val method = ReflectionUtils.findMethod(javaClass, "handle",
String::class.java, String::class.java, String::class.java, String::class.java,
Boolean::class.java, Boolean::class.java, Int::class.java, Int::class.java, String::class.java, String::class.java,
MultipartFile::class.java, MultipartFile::class.java, MultipartFile::class.java, MultipartFile::class.java)!!
val method = RequestParamMethodArgumentResolverKotlinTests::handle.javaMethod!!
val valueClassMethod = RequestParamMethodArgumentResolverKotlinTests::handleValueClass.javaMethod!!
nullableParamRequired = SynthesizingMethodParameter(method, 0)
nullableParamNotRequired = SynthesizingMethodParameter(method, 1)
@@ -101,6 +102,9 @@ class RequestParamMethodArgumentResolverKotlinTests {
nullableMultipartParamNotRequired = SynthesizingMethodParameter(method, 11)
nonNullableMultipartParamRequired = SynthesizingMethodParameter(method, 12)
nonNullableMultipartParamNotRequired = SynthesizingMethodParameter(method, 13)
nonNullableValueClassParam = SynthesizingMethodParameter(valueClassMethod, 0)
nullableValueClassParam = SynthesizingMethodParameter(valueClassMethod, 1)
}
@Test
@@ -317,6 +321,20 @@ class RequestParamMethodArgumentResolverKotlinTests {
}
}
@Test
fun resolveNonNullableValueClass() {
request.addParameter("value", "123")
var result = resolver.resolveArgument(nonNullableValueClassParam, null, webRequest, binderFactory)
assertThat(result).isEqualTo(123)
}
@Test
fun resolveNullableValueClass() {
request.addParameter("value", "123")
var result = resolver.resolveArgument(nullableValueClassParam, null, webRequest, binderFactory)
assertThat(result).isEqualTo(123)
}
@Suppress("unused_parameter")
fun handle(
@@ -338,5 +356,13 @@ class RequestParamMethodArgumentResolverKotlinTests {
@RequestParam("mfile", required = false) nonNullableMultipartParamNotRequired: MultipartFile) {
}
@Suppress("unused_parameter")
fun handleValueClass(
@RequestParam("value") nonNullable: ValueClass,
@RequestParam("value") nullable: ValueClass?) {
}
@JvmInline value class ValueClass(val value: Int)
}