Support code generation for Set with non-comparable elements

Closes gh-29792

spring-beans/src/main/java/org/springframework/beans/factory/aot/BeanDefinitionPropertyValueCodeGenerator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -55,6 +55,7 @@ import org.springframework.util.ObjectUtils;
  *
  * @author Stephane Nicoll
  * @author Phillip Webb
+ * @author Sebastien Deleuze
  * @since 6.0
  */
 class BeanDefinitionPropertyValueCodeGenerator {
@@ -448,7 +449,12 @@ class BeanDefinitionPropertyValueCodeGenerator {
 				return CodeBlock.of("new $T($L)", LinkedHashSet.class,
 						generateCollectionOf(set, List.class, elementType));
 			}
-			set = orderForCodeConsistency(set);
+			try {
+				set = orderForCodeConsistency(set);
+			}
+			catch (ClassCastException ex) {
+				// If elements are not comparable, just keep the original set
+			}
 			return super.generateCollectionCode(elementType, set);
 		}
 

spring-beans/src/test/java/org/springframework/beans/factory/aot/BeanDefinitionPropertyValueCodeGeneratorTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -59,6 +59,7 @@ import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException
  *
  * @author Stephane Nicoll
  * @author Phillip Webb
+ * @author Sebastien Deleuze
  * @since 6.0
  * @see BeanDefinitionPropertyValueCodeGeneratorTests
  */
@@ -438,6 +439,12 @@ class BeanDefinitionPropertyValueCodeGeneratorTests {
 			});
 		}
 
+		@Test
+		void generateWhenSetOfClass() {
+			Set<Class<?>> set = Set.of(String.class, Integer.class, Long.class);
+			compile(set, (instance, compiler) -> assertThat(instance).isEqualTo(set));
+		}
+
 	}
 
 	@Nested