Refine BindingReflectionHintsRegistrar Kotlin support

Closes gh-29593

spring-core/src/main/java/org/springframework/aot/hint/BindingReflectionHintsRegistrar.java

@@ -111,6 +111,8 @@ public class BindingReflectionHintsRegistrar {
 				if (KotlinDetector.isKotlinType(clazz)) {
 					KotlinDelegate.registerComponentHints(hints, clazz);
 					registerKotlinSerializationHints(hints, clazz);
+					// For Kotlin reflection
+					typeHint.withMembers(MemberCategory.INTROSPECT_DECLARED_METHODS);
 				}
 			});
 		}
@@ -192,7 +194,7 @@ public class BindingReflectionHintsRegistrar {
 			if (kClass.isData()) {
 				for (Method method : type.getMethods()) {
 					String methodName = method.getName();
-					if (methodName.startsWith("component") || methodName.equals("copy")) {
+					if (methodName.startsWith("component") || methodName.equals("copy") || methodName.equals("copy$default")) {
 						hints.registerMethod(method, ExecutableMode.INVOKE);
 					}
 				}

spring-core/src/test/kotlin/org/springframework/aot/hint/KotlinBindingReflectionHintsRegistrarTests.kt

@@ -20,6 +20,7 @@ import org.assertj.core.api.Assertions.assertThat
 import org.assertj.core.api.ThrowingConsumer
 import org.junit.jupiter.api.Test
 import org.springframework.aot.hint.predicate.RuntimeHintsPredicates
+import java.lang.reflect.Method
 
 /**
  * Tests for Kotlin support in [BindingReflectionHintsRegistrar].
@@ -67,6 +68,16 @@ class KotlinBindingReflectionHintsRegistrarTests {
 		assertThat(RuntimeHintsPredicates.reflection().onMethod(SampleDataClass::class.java, "component1")).accepts(hints)
 		assertThat(RuntimeHintsPredicates.reflection().onMethod(SampleDataClass::class.java, "copy")).accepts(hints)
 		assertThat(RuntimeHintsPredicates.reflection().onMethod(SampleDataClass::class.java, "getName")).accepts(hints)
+		val copyDefault: Method = SampleDataClass::class.java.getMethod("copy\$default", SampleDataClass::class.java,
+			String::class.java , Int::class.java, Object::class.java)
+		assertThat(RuntimeHintsPredicates.reflection().onMethod(copyDefault)).accepts(hints)
+	}
+
+	@Test
+	fun `Register reflection hints on declared methods for Kotlin class`() {
+		bindingRegistrar.registerReflectionHints(hints.reflection(), SampleClass::class.java)
+		assertThat(RuntimeHintsPredicates.reflection().onType(SampleClass::class.java)
+			.withMemberCategory(MemberCategory.INTROSPECT_DECLARED_METHODS)).accepts(hints)
 	}
 }
 
@@ -74,3 +85,5 @@ class KotlinBindingReflectionHintsRegistrarTests {
 class SampleSerializableClass(val name: String)
 
 data class SampleDataClass(val name: String)
+
+class SampleClass(val name: String)