Register SpringApplication on ReflectionHints for binding

Closes gh-31534

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/SpringApplication.java

@@ -33,6 +33,8 @@ import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
 import org.springframework.aot.AotDetector;
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.RuntimeHintsRegistrar;
 import org.springframework.beans.BeansException;
 import org.springframework.beans.CachedIntrospectionResults;
 import org.springframework.beans.factory.config.BeanDefinition;
@@ -45,6 +47,7 @@ import org.springframework.beans.factory.support.BeanNameGenerator;
 import org.springframework.beans.factory.support.DefaultListableBeanFactory;
 import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
 import org.springframework.boot.Banner.Mode;
+import org.springframework.boot.context.properties.ConfigurationPropertiesReflectionHintsRegistrar;
 import org.springframework.boot.context.properties.bind.Bindable;
 import org.springframework.boot.context.properties.bind.Binder;
 import org.springframework.boot.context.properties.source.ConfigurationPropertySources;
@@ -1390,4 +1393,14 @@ public class SpringApplication {
 
 	}
 
+	static class SpringApplicationRuntimeHints implements RuntimeHintsRegistrar {
+
+		@Override
+		public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
+			ConfigurationPropertiesReflectionHintsRegistrar.processConfigurationProperties(SpringApplication.class,
+					hints.reflection());
+		}
+
+	}
+
 }

spring-boot-project/spring-boot/src/main/resources/META-INF/spring/aot.factories

@@ -4,6 +4,7 @@ org.springframework.boot.env.PropertySourceRuntimeHints,\
 org.springframework.boot.json.JacksonRuntimeHints,\
 org.springframework.boot.logging.java.JavaLoggingSystemRuntimeHints,\
 org.springframework.boot.logging.logback.LogbackRuntimeHints,\
+org.springframework.boot.SpringApplication.SpringApplicationRuntimeHints,\
 org.springframework.boot.WebApplicationType.WebApplicationTypeRuntimeHints
 
 org.springframework.beans.factory.aot.BeanFactoryInitializationAotProcessor=\