Enforce static @ConfigurationPropertyBinding @bean methods

See gh-45640

Signed-off-by: Tran Ngoc Nhan <[email protected]>

Author: ngocnhan-tran1996

buildSrc/src/main/java/org/springframework/boot/build/architecture/ArchitectureRules.java

@@ -59,6 +59,7 @@
  * @author Scott Frederick
  * @author Ivan Malutin
  * @author Phillip Webb
+ * @author Ngoc Nhan
  */
 final class ArchitectureRules {
 
@@ -88,6 +89,7 @@ static List<ArchRule> standard() {
 		rules.add(noClassesShouldCallStringToLowerCaseWithoutLocale());
 		rules.add(conditionalOnMissingBeanShouldNotSpecifyOnlyATypeThatIsTheSameAsMethodReturnType());
 		rules.add(enumSourceShouldNotSpecifyOnlyATypeThatIsTheSameAsMethodParameterType());
+		rules.add(allConfigurationPropertiesBindingBeanMethodsShouldBeStatic());
 		return List.copyOf(rules);
 	}
 
@@ -230,6 +232,14 @@ private static void notSpecifyOnlyATypeThatIsTheSameAsTheMethodParameterType(Jav
 		}
 	}
 
+	private static ArchRule allConfigurationPropertiesBindingBeanMethodsShouldBeStatic() {
+		return methodsThatAreAnnotatedWith("org.springframework.context.annotation.Bean").and()
+			.areAnnotatedWith("org.springframework.boot.context.properties.ConfigurationPropertiesBinding")
+			.should()
+			.beStatic()
+			.allowEmptyShould(true);
+	}
+
 	private static boolean containsOnlySingleType(JavaType[] types, JavaType type) {
 		return types.length == 1 && type.equals(types[0]);
 	}