Apply "instanceof pattern matching" in spring-tx

This commit applies "instanceof pattern matching" to the rest of the
code in spring-tx.

See gh-30019

spring-tx/src/main/java/org/springframework/dao/annotation/PersistenceExceptionTranslationPostProcessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 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.
@@ -82,12 +82,11 @@ public class PersistenceExceptionTranslationPostProcessor extends AbstractBeanFa
 	public void setBeanFactory(BeanFactory beanFactory) {
 		super.setBeanFactory(beanFactory);
 
-		if (!(beanFactory instanceof ListableBeanFactory)) {
+		if (!(beanFactory instanceof ListableBeanFactory lbf)) {
 			throw new IllegalArgumentException(
 					"Cannot use PersistenceExceptionTranslator autodetection without ListableBeanFactory");
 		}
-		this.advisor = new PersistenceExceptionTranslationAdvisor(
-				(ListableBeanFactory) beanFactory, this.repositoryAnnotationType);
+		this.advisor = new PersistenceExceptionTranslationAdvisor(lbf, this.repositoryAnnotationType);
 	}
 
 }

spring-tx/src/main/java/org/springframework/dao/support/DataAccessUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 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.
@@ -169,9 +169,9 @@ public abstract class DataAccessUtils {
 			if (String.class == requiredType) {
 				result = result.toString();
 			}
-			else if (Number.class.isAssignableFrom(requiredType) && result instanceof Number) {
+			else if (Number.class.isAssignableFrom(requiredType) && result instanceof Number number) {
 				try {
-					result = NumberUtils.convertNumberToTargetClass(((Number) result), (Class<? extends Number>) requiredType);
+					result = NumberUtils.convertNumberToTargetClass(number, (Class<? extends Number>) requiredType);
 				}
 				catch (IllegalArgumentException ex) {
 					throw new TypeMismatchDataAccessException(ex.getMessage());

spring-tx/src/main/java/org/springframework/dao/support/PersistenceExceptionTranslationInterceptor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 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.
@@ -114,11 +114,11 @@ public class PersistenceExceptionTranslationInterceptor
 	public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
 		if (this.persistenceExceptionTranslator == null) {
 			// No explicit exception translator specified - perform autodetection.
-			if (!(beanFactory instanceof ListableBeanFactory)) {
+			if (!(beanFactory instanceof ListableBeanFactory lbf)) {
 				throw new IllegalArgumentException(
 						"Cannot use PersistenceExceptionTranslator autodetection without ListableBeanFactory");
 			}
-			this.beanFactory = (ListableBeanFactory) beanFactory;
+			this.beanFactory = lbf;
 		}
 	}
 

spring-tx/src/main/java/org/springframework/jca/endpoint/AbstractMessageEndpointFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 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.

spring-tx/src/main/java/org/springframework/transaction/interceptor/TransactionAspectSupport.java

@@ -343,7 +343,7 @@ public abstract class TransactionAspectSupport implements BeanFactoryAware, Init
 		final TransactionAttribute txAttr = (tas != null ? tas.getTransactionAttribute(method, targetClass) : null);
 		final TransactionManager tm = determineTransactionManager(txAttr);
 
-		if (this.reactiveAdapterRegistry != null && tm instanceof ReactiveTransactionManager) {
+		if (this.reactiveAdapterRegistry != null && tm instanceof ReactiveTransactionManager rtm) {
 			boolean isSuspendingFunction = KotlinDetector.isSuspendingFunction(method);
 			boolean hasSuspendingFlowReturnType = isSuspendingFunction &&
 					COROUTINES_FLOW_CLASS_NAME.equals(new MethodParameter(method, -1).getParameterType().getName());
@@ -367,7 +367,7 @@ public abstract class TransactionAspectSupport implements BeanFactoryAware, Init
 			if (corInv != null) {
 				callback = () -> KotlinDelegate.invokeSuspendingFunction(method, corInv);
 			}
-			Object result = txSupport.invokeWithinTransaction(method, targetClass, callback, txAttr, (ReactiveTransactionManager) tm);
+			Object result = txSupport.invokeWithinTransaction(method, targetClass, callback, txAttr, rtm);
 			if (corInv != null) {
 				Publisher<?> pr = (Publisher<?>) result;
 				return (hasSuspendingFlowReturnType ? KotlinDelegate.asFlow(pr) :
@@ -379,7 +379,7 @@ public abstract class TransactionAspectSupport implements BeanFactoryAware, Init
 		PlatformTransactionManager ptm = asPlatformTransactionManager(tm);
 		final String joinpointIdentification = methodIdentification(method, targetClass, txAttr);
 
-		if (txAttr == null || !(ptm instanceof CallbackPreferringPlatformTransactionManager)) {
+		if (txAttr == null || !(ptm instanceof CallbackPreferringPlatformTransactionManager cpptm)) {
 			// Standard transaction demarcation with getTransaction and commit/rollback calls.
 			TransactionInfo txInfo = createTransactionIfNecessary(ptm, txAttr, joinpointIdentification);
 
@@ -416,7 +416,7 @@ public abstract class TransactionAspectSupport implements BeanFactoryAware, Init
 
 			// It's a CallbackPreferringPlatformTransactionManager: pass a TransactionCallback in.
 			try {
-				result = ((CallbackPreferringPlatformTransactionManager) ptm).execute(txAttr, status -> {
+				result = cpptm.execute(txAttr, status -> {
 					TransactionInfo txInfo = prepareTransactionInfo(ptm, txAttr, joinpointIdentification, status);
 					try {
 						Object retVal = invocation.proceedWithInvocation();
@@ -429,8 +429,8 @@ public abstract class TransactionAspectSupport implements BeanFactoryAware, Init
 					catch (Throwable ex) {
 						if (txAttr.rollbackOn(ex)) {
 							// A RuntimeException: will lead to a rollback.
-							if (ex instanceof RuntimeException rex) {
-								throw rex;
+							if (ex instanceof RuntimeException runtimeException) {
+								throw runtimeException;
 							}
 							else {
 								throw new ThrowableHolderException(ex);
@@ -524,8 +524,11 @@ public abstract class TransactionAspectSupport implements BeanFactoryAware, Init
 
 	@Nullable
 	private PlatformTransactionManager asPlatformTransactionManager(@Nullable Object transactionManager) {
-		if (transactionManager == null || transactionManager instanceof PlatformTransactionManager) {
-			return (PlatformTransactionManager) transactionManager;
+		if (transactionManager == null) {
+			return null;
+		}
+		if (transactionManager instanceof PlatformTransactionManager ptm) {
+			return ptm;
 		}
 		else {
 			throw new IllegalStateException(

spring-tx/src/main/java/org/springframework/transaction/jta/JtaTransactionManager.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 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.

spring-tx/src/main/java/org/springframework/transaction/reactive/TransactionSynchronizationUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 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.
@@ -55,8 +55,8 @@ abstract class TransactionSynchronizationUtils {
 		Assert.notNull(resource, "Resource must not be null");
 		Object resourceRef = resource;
 		// unwrap infrastructure proxy
-		if (resourceRef instanceof InfrastructureProxy infraProxy) {
-			resourceRef = infraProxy.getWrappedObject();
+		if (resourceRef instanceof InfrastructureProxy infrastructureProxy) {
+			resourceRef = infrastructureProxy.getWrappedObject();
 		}
 		if (aopAvailable) {
 			// now unwrap scoped proxy
@@ -125,8 +125,8 @@ abstract class TransactionSynchronizationUtils {
 	private static class ScopedProxyUnwrapper {
 
 		public static Object unwrapIfNecessary(Object resource) {
-			if (resource instanceof ScopedObject so) {
-				return so.getTargetObject();
+			if (resource instanceof ScopedObject scopedObject) {
+				return scopedObject.getTargetObject();
 			}
 			else {
 				return resource;

spring-tx/src/main/java/org/springframework/transaction/reactive/TransactionalOperatorImpl.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.

spring-tx/src/main/java/org/springframework/transaction/support/DefaultTransactionStatus.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 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.
@@ -161,8 +161,8 @@ public class DefaultTransactionStatus extends AbstractTransactionStatus {
 	 */
 	@Override
 	public boolean isGlobalRollbackOnly() {
-		return ((this.transaction instanceof SmartTransactionObject) &&
-				((SmartTransactionObject) this.transaction).isRollbackOnly());
+		return (this.transaction instanceof SmartTransactionObject smartTransactionObject &&
+				smartTransactionObject.isRollbackOnly());
 	}
 
 	/**
@@ -174,11 +174,11 @@ public class DefaultTransactionStatus extends AbstractTransactionStatus {
 	@Override
 	protected SavepointManager getSavepointManager() {
 		Object transaction = this.transaction;
-		if (!(transaction instanceof SavepointManager manager)) {
+		if (!(transaction instanceof SavepointManager savepointManager)) {
 			throw new NestedTransactionNotSupportedException(
 					"Transaction object [" + this.transaction + "] does not support savepoints");
 		}
-		return manager;
+		return savepointManager;
 	}
 
 	/**
@@ -198,8 +198,8 @@ public class DefaultTransactionStatus extends AbstractTransactionStatus {
 	 */
 	@Override
 	public void flush() {
-		if (this.transaction instanceof SmartTransactionObject transactionObject) {
-			transactionObject.flush();
+		if (this.transaction instanceof SmartTransactionObject smartTransactionObject) {
+			smartTransactionObject.flush();
 		}
 	}
 

spring-tx/src/main/java/org/springframework/transaction/support/TransactionSynchronizationManager.java

@@ -146,7 +146,7 @@ public abstract class TransactionSynchronizationManager {
 		}
 		Object value = map.get(actualKey);
 		// Transparently remove ResourceHolder that was marked as void...
-		if (value instanceof ResourceHolder && ((ResourceHolder) value).isVoid()) {
+		if (value instanceof ResourceHolder resourceHolder && resourceHolder.isVoid()) {
 			map.remove(actualKey);
 			// Remove entire ThreadLocal if empty...
 			if (map.isEmpty()) {
@@ -175,7 +175,7 @@ public abstract class TransactionSynchronizationManager {
 		}
 		Object oldValue = map.put(actualKey, value);
 		// Transparently suppress a ResourceHolder that was marked as void...
-		if (oldValue instanceof ResourceHolder && ((ResourceHolder) oldValue).isVoid()) {
+		if (oldValue instanceof ResourceHolder resourceHolder && resourceHolder.isVoid()) {
 			oldValue = null;
 		}
 		if (oldValue != null) {
@@ -226,7 +226,7 @@ public abstract class TransactionSynchronizationManager {
 			resources.remove();
 		}
 		// Transparently suppress a ResourceHolder that was marked as void...
-		if (value instanceof ResourceHolder && ((ResourceHolder) value).isVoid()) {
+		if (value instanceof ResourceHolder resourceHolder && resourceHolder.isVoid()) {
 			value = null;
 		}
 		return value;

spring-tx/src/main/java/org/springframework/transaction/support/TransactionSynchronizationUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 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.
@@ -64,8 +64,8 @@ public abstract class TransactionSynchronizationUtils {
 		Assert.notNull(resource, "Resource must not be null");
 		Object resourceRef = resource;
 		// unwrap infrastructure proxy
-		if (resourceRef instanceof InfrastructureProxy infrasProxy) {
-			resourceRef = infrasProxy.getWrappedObject();
+		if (resourceRef instanceof InfrastructureProxy infrastructureProxy) {
+			resourceRef = infrastructureProxy.getWrappedObject();
 		}
 		if (aopAvailable) {
 			// now unwrap scoped proxy

spring-tx/src/main/java/org/springframework/transaction/support/TransactionTemplate.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 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.
@@ -130,8 +130,8 @@ public class TransactionTemplate extends DefaultTransactionDefinition
 	public <T> T execute(TransactionCallback<T> action) throws TransactionException {
 		Assert.state(this.transactionManager != null, "No PlatformTransactionManager set");
 
-		if (this.transactionManager instanceof CallbackPreferringPlatformTransactionManager) {
-			return ((CallbackPreferringPlatformTransactionManager) this.transactionManager).execute(this, action);
+		if (this.transactionManager instanceof CallbackPreferringPlatformTransactionManager cpptm) {
+			return cpptm.execute(this, action);
 		}
 		else {
 			TransactionStatus status = this.transactionManager.getTransaction(this);