Polishing.

Use ResolvableType for type assignability check when resolving Type from a KType.

See #2324.

src/main/java/org/springframework/data/mapping/model/KotlinCopyMethod.java

@@ -33,6 +33,7 @@ import java.util.List;
 import java.util.Optional;
 import java.util.stream.Collectors;
 
+import org.springframework.core.ResolvableType;
 import org.springframework.data.mapping.PersistentEntity;
 import org.springframework.data.mapping.PersistentProperty;
 import org.springframework.data.mapping.SimplePropertyHandler;
@@ -277,11 +278,7 @@ class KotlinCopyMethod {
 
 		Type parameterType = ReflectJvmMapping.getJavaType(source);
 
-		if (parameterType instanceof Class) {
-			return target.isAssignableFrom((Class<?>) parameterType);
-		}
-
-		return false;
+		return ResolvableType.forClass(target).isAssignableFrom(ResolvableType.forType(parameterType));
 	}
 
 	/**

src/test/java/org/springframework/data/mapping/model/KotlinCopyMethodUnitTests.java

@@ -72,4 +72,12 @@ class KotlinCopyMethodUnitTests {
 		assertThat(copyMethod.shouldUsePublicCopyMethod(mappingContext.getRequiredPersistentEntity(DataClassKt.class)))
 				.isTrue();
 	}
+
+	@Test // #2324
+	void shouldDetermineCopyMethodForParametrizedType() {
+
+		Optional<KotlinCopyMethod> copyMethod = KotlinCopyMethod.findCopyMethod(ImmutableKotlinPerson.class);
+
+		assertThat(copyMethod).isPresent();
+	}
 }

src/test/kotlin/org/springframework/data/mapping/model/DataClasses.kt

@@ -15,6 +15,7 @@
  */
 package org.springframework.data.mapping.model
 
+import org.springframework.data.annotation.Id
 import java.time.LocalDateTime
 import java.util.*
 
@@ -59,3 +60,8 @@ data class WithCustomCopyMethod(
 	)
 
 }
+
+data class ImmutableKotlinPerson(
+	@Id val name: String,
+	val wasOnboardedBy: List<ImmutableKotlinPerson>
+)