Refine null-safety in more modules

This commit refines the null-safety in:
 - spring-jdbc
 - spring-r2dbc
 - spring-orm
 - spring-beans
 - spring-aop

See gh-32475

spring-aop/src/main/java/org/springframework/aop/aspectj/annotation/AspectJAdvisorBeanRegistrationAotProcessor.java

@@ -22,6 +22,7 @@ import org.springframework.beans.factory.aot.BeanRegistrationAotContribution;
 import org.springframework.beans.factory.aot.BeanRegistrationAotProcessor;
 import org.springframework.beans.factory.aot.BeanRegistrationCode;
 import org.springframework.beans.factory.support.RegisteredBean;
+import org.springframework.lang.Nullable;
 import org.springframework.util.ClassUtils;
 
 /**
@@ -38,6 +39,7 @@ class AspectJAdvisorBeanRegistrationAotProcessor implements BeanRegistrationAotP
 
 
 	@Override
+	@Nullable
 	public BeanRegistrationAotContribution processAheadOfTime(RegisteredBean registeredBean) {
 		if (aspectjPresent) {
 			Class<?> beanClass = registeredBean.getBeanClass();

spring-aop/src/main/java/org/springframework/aop/config/SpringConfiguredBeanDefinitionParser.java

@@ -23,6 +23,7 @@ import org.springframework.beans.factory.parsing.BeanComponentDefinition;
 import org.springframework.beans.factory.support.RootBeanDefinition;
 import org.springframework.beans.factory.xml.BeanDefinitionParser;
 import org.springframework.beans.factory.xml.ParserContext;
+import org.springframework.lang.Nullable;
 
 /**
  * {@link BeanDefinitionParser} responsible for parsing the
@@ -51,6 +52,7 @@ class SpringConfiguredBeanDefinitionParser implements BeanDefinitionParser {
 
 
 	@Override
+	@Nullable
 	public BeanDefinition parse(Element element, ParserContext parserContext) {
 		if (!parserContext.getRegistry().containsBeanDefinition(BEAN_CONFIGURER_ASPECT_BEAN_NAME)) {
 			RootBeanDefinition def = new RootBeanDefinition();

spring-aop/src/main/java/org/springframework/aop/framework/autoproxy/AbstractAutoProxyCreator.java

@@ -270,6 +270,7 @@ public abstract class AbstractAutoProxyCreator extends ProxyProcessorSupport
 	}
 
 	@Override
+	@Nullable
 	public Object postProcessBeforeInstantiation(Class<?> beanClass, String beanName) {
 		Object cacheKey = getCacheKey(beanClass, beanName);
 
@@ -311,6 +312,7 @@ public abstract class AbstractAutoProxyCreator extends ProxyProcessorSupport
 	 * @see #getAdvicesAndAdvisorsForBean
 	 */
 	@Override
+	@Nullable
 	public Object postProcessAfterInitialization(@Nullable Object bean, String beanName) {
 		if (bean != null) {
 			Object cacheKey = getCacheKey(bean.getClass(), beanName);

spring-aop/src/main/java/org/springframework/aop/framework/autoproxy/BeanNameAutoProxyCreator.java

@@ -81,6 +81,7 @@ public class BeanNameAutoProxyCreator extends AbstractAutoProxyCreator {
 	 * @see #setBeanNames(String...)
 	 */
 	@Override
+	@Nullable
 	protected TargetSource getCustomTargetSource(Class<?> beanClass, String beanName) {
 		return (isSupportedBeanName(beanClass, beanName) ?
 				super.getCustomTargetSource(beanClass, beanName) : null);

spring-aop/src/main/java/org/springframework/aop/scope/ScopedProxyBeanRegistrationAotProcessor.java

@@ -53,6 +53,7 @@ class ScopedProxyBeanRegistrationAotProcessor implements BeanRegistrationAotProc
 
 
 	@Override
+	@Nullable
 	public BeanRegistrationAotContribution processAheadOfTime(RegisteredBean registeredBean) {
 		Class<?> beanClass = registeredBean.getBeanClass();
 		if (beanClass.equals(ScopedProxyFactoryBean.class)) {

spring-aop/src/main/java/org/springframework/aop/scope/ScopedProxyFactoryBean.java

@@ -117,6 +117,7 @@ public class ScopedProxyFactoryBean extends ProxyConfig
 
 
 	@Override
+	@Nullable
 	public Object getObject() {
 		if (this.proxy == null) {
 			throw new FactoryBeanNotInitializedException();
@@ -125,6 +126,7 @@ public class ScopedProxyFactoryBean extends ProxyConfig
 	}
 
 	@Override
+	@Nullable
 	public Class<?> getObjectType() {
 		if (this.proxy != null) {
 			return this.proxy.getClass();

spring-beans/src/main/java/org/springframework/beans/BeanInstantiationException.java

@@ -69,7 +69,7 @@ public class BeanInstantiationException extends FatalBeanException {
 	 * @param cause the root cause
 	 * @since 4.3
 	 */
-	public BeanInstantiationException(Constructor<?> constructor, String msg, @Nullable Throwable cause) {
+	public BeanInstantiationException(Constructor<?> constructor, @Nullable String msg, @Nullable Throwable cause) {
 		super("Failed to instantiate [" + constructor.getDeclaringClass().getName() + "]: " + msg, cause);
 		this.beanClass = constructor.getDeclaringClass();
 		this.constructor = constructor;
@@ -84,7 +84,7 @@ public class BeanInstantiationException extends FatalBeanException {
 	 * @param cause the root cause
 	 * @since 4.3
 	 */
-	public BeanInstantiationException(Method constructingMethod, String msg, @Nullable Throwable cause) {
+	public BeanInstantiationException(Method constructingMethod, @Nullable String msg, @Nullable Throwable cause) {
 		super("Failed to instantiate [" + constructingMethod.getReturnType().getName() + "]: " + msg, cause);
 		this.beanClass = constructingMethod.getReturnType();
 		this.constructor = null;

spring-beans/src/main/java/org/springframework/beans/MethodInvocationException.java

@@ -18,6 +18,8 @@ package org.springframework.beans;
 
 import java.beans.PropertyChangeEvent;
 
+import org.springframework.lang.Nullable;
+
 /**
  * Thrown when a bean property getter or setter method throws an exception,
  * analogous to an InvocationTargetException.
@@ -38,7 +40,7 @@ public class MethodInvocationException extends PropertyAccessException {
 	 * @param propertyChangeEvent the PropertyChangeEvent that resulted in an exception
 	 * @param cause the Throwable raised by the invoked method
 	 */
-	public MethodInvocationException(PropertyChangeEvent propertyChangeEvent, Throwable cause) {
+	public MethodInvocationException(PropertyChangeEvent propertyChangeEvent, @Nullable Throwable cause) {
 		super(propertyChangeEvent, "Property '" + propertyChangeEvent.getPropertyName() + "' threw exception", cause);
 	}
 

spring-beans/src/main/java/org/springframework/beans/factory/BeanCreationException.java

@@ -94,7 +94,7 @@ public class BeanCreationException extends FatalBeanException {
 	 * @param beanName the name of the bean requested
 	 * @param msg the detail message
 	 */
-	public BeanCreationException(@Nullable String resourceDescription, @Nullable String beanName, String msg) {
+	public BeanCreationException(@Nullable String resourceDescription, @Nullable String beanName, @Nullable String msg) {
 		super("Error creating bean with name '" + beanName + "'" +
 				(resourceDescription != null ? " defined in " + resourceDescription : "") + ": " + msg);
 		this.resourceDescription = resourceDescription;
@@ -110,7 +110,7 @@ public class BeanCreationException extends FatalBeanException {
 	 * @param msg the detail message
 	 * @param cause the root cause
 	 */
-	public BeanCreationException(@Nullable String resourceDescription, String beanName, String msg, Throwable cause) {
+	public BeanCreationException(@Nullable String resourceDescription, String beanName, @Nullable String msg, Throwable cause) {
 		this(resourceDescription, beanName, msg);
 		initCause(cause);
 	}

spring-beans/src/main/java/org/springframework/beans/factory/UnsatisfiedDependencyException.java

@@ -44,7 +44,7 @@ public class UnsatisfiedDependencyException extends BeanCreationException {
 	 * @param msg the detail message
 	 */
 	public UnsatisfiedDependencyException(
-			@Nullable String resourceDescription, @Nullable String beanName, String propertyName, String msg) {
+			@Nullable String resourceDescription, @Nullable String beanName, String propertyName, @Nullable String msg) {
 
 		super(resourceDescription, beanName,
 				"Unsatisfied dependency expressed through bean property '" + propertyName + "'" +
@@ -75,7 +75,7 @@ public class UnsatisfiedDependencyException extends BeanCreationException {
 	 * @since 4.3
 	 */
 	public UnsatisfiedDependencyException(
-			@Nullable String resourceDescription, @Nullable String beanName, @Nullable InjectionPoint injectionPoint, String msg) {
+			@Nullable String resourceDescription, @Nullable String beanName, @Nullable InjectionPoint injectionPoint, @Nullable String msg) {
 
 		super(resourceDescription, beanName,
 				"Unsatisfied dependency expressed through " + injectionPoint +

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

@@ -37,6 +37,7 @@ import org.springframework.beans.factory.support.ManagedMap;
 import org.springframework.beans.factory.support.ManagedSet;
 import org.springframework.javapoet.AnnotationSpec;
 import org.springframework.javapoet.CodeBlock;
+import org.springframework.lang.Nullable;
 
 /**
  * Code generator {@link Delegate} for common bean definition property values.
@@ -101,6 +102,7 @@ abstract class BeanDefinitionPropertyValueCodeGeneratorDelegates {
 		private static final CodeBlock EMPTY_RESULT = CodeBlock.of("$T.ofEntries()", ManagedMap.class);
 
 		@Override
+		@Nullable
 		public CodeBlock generateCode(ValueCodeGenerator valueCodeGenerator, Object value) {
 			if (value instanceof ManagedMap<?, ?> managedMap) {
 				return generateManagedMapCode(valueCodeGenerator, managedMap);
@@ -137,6 +139,7 @@ abstract class BeanDefinitionPropertyValueCodeGeneratorDelegates {
 	private static class LinkedHashMapDelegate extends MapDelegate {
 
 		@Override
+		@Nullable
 		protected CodeBlock generateMapCode(ValueCodeGenerator valueCodeGenerator, Map<?, ?> map) {
 			GeneratedMethods generatedMethods = valueCodeGenerator.getGeneratedMethods();
 			if (map instanceof LinkedHashMap<?, ?> && generatedMethods != null) {
@@ -172,6 +175,7 @@ abstract class BeanDefinitionPropertyValueCodeGeneratorDelegates {
 	private static class BeanReferenceDelegate implements Delegate {
 
 		@Override
+		@Nullable
 		public CodeBlock generateCode(ValueCodeGenerator valueCodeGenerator, Object value) {
 			if (value instanceof RuntimeBeanReference runtimeBeanReference &&
 					runtimeBeanReference.getBeanType() != null) {
@@ -193,6 +197,7 @@ abstract class BeanDefinitionPropertyValueCodeGeneratorDelegates {
 	private static class TypedStringValueDelegate implements Delegate {
 
 		@Override
+		@Nullable
 		public CodeBlock generateCode(ValueCodeGenerator valueCodeGenerator, Object value) {
 			if (value instanceof TypedStringValue typedStringValue) {
 				return generateTypeStringValueCode(valueCodeGenerator, typedStringValue);

spring-beans/src/main/java/org/springframework/beans/factory/config/AbstractFactoryBean.java

@@ -151,6 +151,7 @@ public abstract class AbstractFactoryBean<T>
 	 * @see #getEarlySingletonInterfaces()
 	 */
 	@Override
+	@Nullable
 	public final T getObject() throws Exception {
 		if (isSingleton()) {
 			return (this.initialized ? this.singletonInstance : getEarlySingletonInstance());

spring-beans/src/main/java/org/springframework/beans/factory/config/FieldRetrievingFactoryBean.java

@@ -226,6 +226,7 @@ public class FieldRetrievingFactoryBean
 	}
 
 	@Override
+	@Nullable
 	public Class<?> getObjectType() {
 		return (this.fieldObject != null ? this.fieldObject.getType() : null);
 	}

spring-beans/src/main/java/org/springframework/beans/factory/config/MethodInvokingFactoryBean.java

@@ -136,6 +136,7 @@ public class MethodInvokingFactoryBean extends MethodInvokingBean implements Fac
 	 * or {@code null} if not known in advance.
 	 */
 	@Override
+	@Nullable
 	public Class<?> getObjectType() {
 		if (!isPrepared()) {
 			// Not fully initialized yet -> return null to indicate "not known yet".

spring-beans/src/main/java/org/springframework/beans/factory/config/PropertyPathFactoryBean.java

@@ -224,6 +224,7 @@ public class PropertyPathFactoryBean implements FactoryBean<Object>, BeanNameAwa
 	}
 
 	@Override
+	@Nullable
 	public Class<?> getObjectType() {
 		return this.resultType;
 	}

spring-beans/src/main/java/org/springframework/beans/factory/config/ServiceLocatorFactoryBean.java

@@ -335,6 +335,7 @@ public class ServiceLocatorFactoryBean implements FactoryBean<Object>, BeanFacto
 	}
 
 	@Override
+	@Nullable
 	public Class<?> getObjectType() {
 		return this.serviceLocatorInterface;
 	}

spring-beans/src/main/java/org/springframework/beans/factory/support/CglibSubclassingInstantiationStrategy.java

@@ -241,6 +241,7 @@ public class CglibSubclassingInstantiationStrategy extends SimpleInstantiationSt
 		}
 
 		@Override
+		@Nullable
 		public Object intercept(Object obj, Method method, Object[] args, MethodProxy mp) throws Throwable {
 			// Cast is safe, as CallbackFilter filters are used selectively.
 			LookupOverride lo = (LookupOverride) getBeanDefinition().getMethodOverrides().getOverride(method);

spring-beans/src/main/java/org/springframework/beans/factory/support/ConstructorResolver.java

@@ -1434,6 +1434,7 @@ class ConstructorResolver {
 		}
 
 		@Override
+		@Nullable
 		public Object resolveShortcut(BeanFactory beanFactory) {
 			String shortcut = this.shortcut;
 			return (shortcut != null ? beanFactory.getBean(shortcut, getDependencyType()) : null);

spring-beans/src/main/java/org/springframework/beans/factory/support/DisposableBeanAdapter.java

@@ -342,7 +342,7 @@ class DisposableBeanAdapter implements DisposableBean, Runnable, Serializable {
 		}
 	}
 
-	void logDestroyMethodException(Method destroyMethod, Throwable ex) {
+	void logDestroyMethodException(Method destroyMethod, @Nullable Throwable ex) {
 		if (logger.isWarnEnabled()) {
 			String msg = "Custom destroy method '" + destroyMethod.getName() + "' on bean with name '" +
 					this.beanName + "' propagated an exception";

spring-beans/src/main/java/org/springframework/beans/factory/support/InstanceSupplier.java

@@ -83,6 +83,7 @@ public interface InstanceSupplier<T> extends ThrowingSupplier<T> {
 				return after.applyWithException(registeredBean, InstanceSupplier.this.get(registeredBean));
 			}
 			@Override
+			@Nullable
 			public Method getFactoryMethod() {
 				return InstanceSupplier.this.getFactoryMethod();
 			}
@@ -126,6 +127,7 @@ public interface InstanceSupplier<T> extends ThrowingSupplier<T> {
 				return supplier.getWithException();
 			}
 			@Override
+			@Nullable
 			public Method getFactoryMethod() {
 				return factoryMethod;
 			}

spring-beans/src/main/java/org/springframework/beans/factory/support/RootBeanDefinition.java

@@ -277,6 +277,7 @@ public class RootBeanDefinition extends AbstractBeanDefinition {
 
 
 	@Override
+	@Nullable
 	public String getParentName() {
 		return null;
 	}

spring-beans/src/main/java/org/springframework/beans/factory/support/StaticListableBeanFactory.java

@@ -232,11 +232,13 @@ public class StaticListableBeanFactory implements ListableBeanFactory {
 	}
 
 	@Override
+	@Nullable
 	public Class<?> getType(String name) throws NoSuchBeanDefinitionException {
 		return getType(name, true);
 	}
 
 	@Override
+	@Nullable
 	public Class<?> getType(String name, boolean allowFactoryBeanInit) throws NoSuchBeanDefinitionException {
 		String beanName = BeanFactoryUtils.transformedBeanName(name);
 

spring-core/src/main/java/org/springframework/util/MethodInvoker.java

@@ -136,7 +136,7 @@ public class MethodInvoker {
 	 * Set arguments for the method invocation. If this property is not set,
 	 * or the Object array is of length 0, a method with no arguments is assumed.
 	 */
-	public void setArguments(Object... arguments) {
+	public void setArguments(@Nullable Object... arguments) {
 		this.arguments = arguments;
 	}
 

spring-core/src/main/java/org/springframework/util/ReflectionUtils.java

@@ -137,7 +137,7 @@ public abstract class ReflectionUtils {
 	 * @param ex the exception to rethrow
 	 * @throws RuntimeException the rethrown exception
 	 */
-	public static void rethrowRuntimeException(Throwable ex) {
+	public static void rethrowRuntimeException(@Nullable Throwable ex) {
 		if (ex instanceof RuntimeException runtimeException) {
 			throw runtimeException;
 		}
@@ -158,7 +158,7 @@ public abstract class ReflectionUtils {
 	 * @param throwable the exception to rethrow
 	 * @throws Exception the rethrown exception (in case of a checked exception)
 	 */
-	public static void rethrowException(Throwable throwable) throws Exception {
+	public static void rethrowException(@Nullable Throwable throwable) throws Exception {
 		if (throwable instanceof Exception exception) {
 			throw exception;
 		}

spring-jdbc/src/main/java/org/springframework/jdbc/BadSqlGrammarException.java

@@ -19,6 +19,7 @@ package org.springframework.jdbc;
 import java.sql.SQLException;
 
 import org.springframework.dao.InvalidDataAccessResourceUsageException;
+import org.springframework.lang.Nullable;
 
 /**
  * Exception thrown when SQL specified is invalid. Such exceptions always have
@@ -52,6 +53,7 @@ public class BadSqlGrammarException extends InvalidDataAccessResourceUsageExcept
 	/**
 	 * Return the wrapped SQLException.
 	 */
+	@Nullable
 	public SQLException getSQLException() {
 		return (SQLException) getCause();
 	}

spring-jdbc/src/main/java/org/springframework/jdbc/InvalidResultSetAccessException.java

@@ -64,6 +64,7 @@ public class InvalidResultSetAccessException extends InvalidDataAccessResourceUs
 	/**
 	 * Return the wrapped SQLException.
 	 */
+	@Nullable
 	public SQLException getSQLException() {
 		return (SQLException) getCause();
 	}

spring-jdbc/src/main/java/org/springframework/jdbc/SQLWarningException.java

@@ -19,6 +19,7 @@ package org.springframework.jdbc;
 import java.sql.SQLWarning;
 
 import org.springframework.dao.UncategorizedDataAccessException;
+import org.springframework.lang.Nullable;
 
 /**
  * Exception thrown when we're not ignoring {@link java.sql.SQLWarning SQLWarnings}.
@@ -49,6 +50,7 @@ public class SQLWarningException extends UncategorizedDataAccessException {
 	 * Return the underlying {@link SQLWarning}.
 	 * @since 5.3.29
 	 */
+	@Nullable
 	public SQLWarning getSQLWarning() {
 		return (SQLWarning) getCause();
 	}
@@ -58,6 +60,7 @@ public class SQLWarningException extends UncategorizedDataAccessException {
 	 * @deprecated as of 5.3.29, in favor of {@link #getSQLWarning()}
 	 */
 	@Deprecated(since = "5.3.29")
+	@Nullable
 	public SQLWarning SQLWarning() {
 		return getSQLWarning();
 	}

spring-jdbc/src/main/java/org/springframework/jdbc/UncategorizedSQLException.java

@@ -53,6 +53,7 @@ public class UncategorizedSQLException extends UncategorizedDataAccessException
 	/**
 	 * Return the underlying SQLException.
 	 */
+	@Nullable
 	public SQLException getSQLException() {
 		return (SQLException) getCause();
 	}

spring-jdbc/src/main/java/org/springframework/jdbc/core/JdbcTemplate.java

@@ -907,11 +907,13 @@ public class JdbcTemplate extends JdbcAccessor implements JdbcOperations {
 
 	@Deprecated
 	@Override
+	@Nullable
 	public <T> T queryForObject(String sql, @Nullable Object[] args, Class<T> requiredType) throws DataAccessException {
 		return queryForObject(sql, args, getSingleColumnRowMapper(requiredType));
 	}
 
 	@Override
+	@Nullable
 	public <T> T queryForObject(String sql, Class<T> requiredType, @Nullable Object... args) throws DataAccessException {
 		return queryForObject(sql, args, getSingleColumnRowMapper(requiredType));
 	}

spring-jdbc/src/main/java/org/springframework/jdbc/support/incrementer/AbstractDataFieldMaxValueIncrementer.java

@@ -20,6 +20,7 @@ import javax.sql.DataSource;
 
 import org.springframework.beans.factory.InitializingBean;
 import org.springframework.dao.DataAccessException;
+import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 
 /**
@@ -34,9 +35,11 @@ import org.springframework.util.Assert;
  */
 public abstract class AbstractDataFieldMaxValueIncrementer implements DataFieldMaxValueIncrementer, InitializingBean {
 
+	@Nullable
 	private DataSource dataSource;
 
 	/** The name of the sequence/table containing the sequence. */
+	@Nullable
 	private String incrementerName;
 
 	/** The length to which a string result should be pre-pended with zeroes. */

spring-orm/src/main/java/org/springframework/orm/ObjectOptimisticLockingFailureException.java

@@ -42,7 +42,7 @@ public class ObjectOptimisticLockingFailureException extends OptimisticLockingFa
 	 * @param msg the detail message
 	 * @param cause the source exception
 	 */
-	public ObjectOptimisticLockingFailureException(String msg, Throwable cause) {
+	public ObjectOptimisticLockingFailureException(@Nullable String msg, Throwable cause) {
 		super(msg, cause);
 		this.persistentClass = null;
 		this.identifier = null;
@@ -123,7 +123,7 @@ public class ObjectOptimisticLockingFailureException extends OptimisticLockingFa
 	 * @param cause the source exception
 	 */
 	public ObjectOptimisticLockingFailureException(
-			String persistentClassName, @Nullable Object identifier, String msg, @Nullable Throwable cause) {
+			String persistentClassName, @Nullable Object identifier, @Nullable String msg, @Nullable Throwable cause) {
 
 		super(msg, cause);
 		this.persistentClass = persistentClassName;

spring-orm/src/main/java/org/springframework/orm/ObjectRetrievalFailureException.java

@@ -42,7 +42,7 @@ public class ObjectRetrievalFailureException extends DataRetrievalFailureExcepti
 	 * @param msg the detail message
 	 * @param cause the source exception
 	 */
-	public ObjectRetrievalFailureException(String msg, Throwable cause) {
+	public ObjectRetrievalFailureException(@Nullable String msg, Throwable cause) {
 		super(msg, cause);
 		this.persistentClass = null;
 		this.identifier = null;
@@ -97,7 +97,7 @@ public class ObjectRetrievalFailureException extends DataRetrievalFailureExcepti
 	 * @param cause the source exception
 	 */
 	public ObjectRetrievalFailureException(
-			String persistentClassName, @Nullable Object identifier, String msg, @Nullable Throwable cause) {
+			String persistentClassName, @Nullable Object identifier, @Nullable String msg, @Nullable Throwable cause) {
 
 		super(msg, cause);
 		this.persistentClass = persistentClassName;

spring-orm/src/main/java/org/springframework/orm/hibernate5/HibernateJdbcException.java

@@ -21,6 +21,7 @@ import java.sql.SQLException;
 import org.hibernate.JDBCException;
 
 import org.springframework.dao.UncategorizedDataAccessException;
+import org.springframework.lang.Nullable;
 
 /**
  * Hibernate-specific subclass of UncategorizedDataAccessException,
@@ -48,6 +49,7 @@ public class HibernateJdbcException extends UncategorizedDataAccessException {
 	/**
 	 * Return the SQL that led to the problem.
 	 */
+	@Nullable
 	public String getSql() {
 		return ((JDBCException) getCause()).getSQL();
 	}

spring-orm/src/main/java/org/springframework/orm/hibernate5/HibernateQueryException.java

@@ -19,6 +19,7 @@ package org.springframework.orm.hibernate5;
 import org.hibernate.QueryException;
 
 import org.springframework.dao.InvalidDataAccessResourceUsageException;
+import org.springframework.lang.Nullable;
 
 /**
  * Hibernate-specific subclass of InvalidDataAccessResourceUsageException,
@@ -38,6 +39,7 @@ public class HibernateQueryException extends InvalidDataAccessResourceUsageExcep
 	/**
 	 * Return the HQL query string that was invalid.
 	 */
+	@Nullable
 	public String getQueryString() {
 		return ((QueryException) getCause()).getQueryString();
 	}

spring-orm/src/main/java/org/springframework/orm/hibernate5/support/AsyncRequestInterceptor.java

@@ -22,6 +22,7 @@ import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.hibernate.SessionFactory;
 
+import org.springframework.lang.Nullable;
 import org.springframework.orm.hibernate5.SessionFactoryUtils;
 import org.springframework.orm.hibernate5.SessionHolder;
 import org.springframework.transaction.support.TransactionSynchronizationManager;
@@ -72,7 +73,7 @@ class AsyncRequestInterceptor implements CallableProcessingInterceptor, Deferred
 	}
 
 	@Override
-	public <T> void postProcess(NativeWebRequest request, Callable<T> task, Object concurrentResult) {
+	public <T> void postProcess(NativeWebRequest request, Callable<T> task, @Nullable Object concurrentResult) {
 		TransactionSynchronizationManager.unbindResource(this.sessionFactory);
 	}
 

spring-orm/src/main/java/org/springframework/orm/jpa/support/AsyncRequestInterceptor.java

@@ -22,6 +22,7 @@ import jakarta.persistence.EntityManagerFactory;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
+import org.springframework.lang.Nullable;
 import org.springframework.orm.jpa.EntityManagerFactoryUtils;
 import org.springframework.orm.jpa.EntityManagerHolder;
 import org.springframework.transaction.support.TransactionSynchronizationManager;
@@ -72,7 +73,7 @@ class AsyncRequestInterceptor implements CallableProcessingInterceptor, Deferred
 	}
 
 	@Override
-	public <T> void postProcess(NativeWebRequest request, Callable<T> task, Object concurrentResult) {
+	public <T> void postProcess(NativeWebRequest request, Callable<T> task, @Nullable Object concurrentResult) {
 		TransactionSynchronizationManager.unbindResource(this.emFactory);
 	}
 

spring-r2dbc/src/main/java/org/springframework/r2dbc/BadSqlGrammarException.java

@@ -19,6 +19,7 @@ package org.springframework.r2dbc;
 import io.r2dbc.spi.R2dbcException;
 
 import org.springframework.dao.InvalidDataAccessResourceUsageException;
+import org.springframework.lang.Nullable;
 
 /**
  * Exception thrown when SQL specified is invalid. Such exceptions always have a
@@ -52,6 +53,7 @@ public class BadSqlGrammarException extends InvalidDataAccessResourceUsageExcept
 	/**
 	 * Return the wrapped {@link R2dbcException}.
 	 */
+	@Nullable
 	public R2dbcException getR2dbcException() {
 		return (R2dbcException) getCause();
 	}

spring-r2dbc/src/main/java/org/springframework/r2dbc/UncategorizedR2dbcException.java

@@ -51,6 +51,7 @@ public class UncategorizedR2dbcException extends UncategorizedDataAccessExceptio
 	/**
 	 * Return the wrapped {@link R2dbcException}.
 	 */
+	@Nullable
 	public R2dbcException getR2dbcException() {
 		return (R2dbcException) getCause();
 	}

spring-r2dbc/src/main/java/org/springframework/r2dbc/connection/R2dbcTransactionManager.java

@@ -448,6 +448,7 @@ public class R2dbcTransactionManager extends AbstractReactiveTransactionManager
 
 		@SuppressWarnings("unchecked")
 		@Override
+		@Nullable
 		public <T> T getAttribute(Option<T> option) {
 			return (T) doGetValue(option);
 		}

spring-r2dbc/src/main/java/org/springframework/r2dbc/core/binding/BindMarkersFactoryResolver.java

@@ -129,6 +129,7 @@ public final class BindMarkersFactoryResolver {
 
 
 		@Override
+		@Nullable
 		public BindMarkersFactory getBindMarkers(ConnectionFactory connectionFactory) {
 			ConnectionFactoryMetadata metadata = connectionFactory.getMetadata();
 			BindMarkersFactory r2dbcDialect = BUILTIN.get(metadata.getName());