Upgrade to Kotlin 2.2.0

Kotlin 2.2 is the new baseline for Spring Framework 7.0.

-Xannotation-default-target=param-property is specified to avoid
warnings when compiling tests or documentation snippets. It is
expected to become the default behavior in an upcoming version
of Kotlin, see https://youtrack.jetbrains.com/issue/KT-73255 for
more details.

Closes gh-34453

Author: sdeleuze

buildSrc/src/main/java/org/springframework/build/KotlinConventions.java

@@ -34,16 +34,17 @@ void apply(Project project) {
 
 	private void configure(KotlinCompile compile) {
 		compile.compilerOptions(options -> {
-			options.getApiVersion().set(KotlinVersion.KOTLIN_2_1);
-			options.getLanguageVersion().set(KotlinVersion.KOTLIN_2_1);
+			options.getApiVersion().set(KotlinVersion.KOTLIN_2_2);
+			options.getLanguageVersion().set(KotlinVersion.KOTLIN_2_2);
 			options.getJvmTarget().set(JvmTarget.JVM_17);
 			options.getJavaParameters().set(true);
 			options.getAllWarningsAsErrors().set(true);
 			options.getFreeCompilerArgs().addAll(
 					"-Xsuppress-version-warnings",
 					"-Xjsr305=strict", // For dependencies using JSR 305
 					"-opt-in=kotlin.RequiresOptIn",
-					"-Xjdk-release=17" // Needed due to https://youtrack.jetbrains.com/issue/KT-49746
+					"-Xjdk-release=17", // Needed due to https://youtrack.jetbrains.com/issue/KT-49746
+					"-Xannotation-default-target=param-property" // Upcoming default, see https://youtrack.jetbrains.com/issue/KT-73255
 			);
 		});
 	}

framework-docs/framework-docs.gradle

@@ -46,6 +46,7 @@ repositories {
 // To avoid a redeclaration error with Kotlin compiler
 tasks.named('compileKotlin', KotlinCompilationTask.class) {
 	javaSources.from = []
+	compilerOptions.freeCompilerArgs = [ "-Xannotation-default-target=param-property" ] // Upcoming default, see https://youtrack.jetbrains.com/issue/KT-73255
 }
 
 dependencies {

framework-docs/modules/ROOT/pages/languages/kotlin/requirements.adoc

@@ -2,7 +2,7 @@
 = Requirements
 :page-section-summary-toc: 1
 
-Spring Framework supports Kotlin 2.1+ and requires
+Spring Framework supports Kotlin 2.2+ and requires
 https://search.maven.org/artifact/org.jetbrains.kotlin/kotlin-stdlib[`kotlin-stdlib`]
 and https://search.maven.org/artifact/org.jetbrains.kotlin/kotlin-reflect[`kotlin-reflect`]
 to be present on the classpath. They are provided by default if you bootstrap a Kotlin project on

gradle.properties

@@ -4,7 +4,7 @@ org.gradle.caching=true
 org.gradle.jvmargs=-Xmx2048m
 org.gradle.parallel=true
 
-kotlinVersion=2.2.0-RC2
+kotlinVersion=2.2.0
 
 kotlin.jvm.target.validation.mode=ignore
 kotlin.stdlib.default.dependency=false