Polishing

spring-core/src/main/java/org/springframework/core/DefaultParameterNameDiscoverer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -41,6 +41,7 @@ public class DefaultParameterNameDiscoverer extends PrioritizedParameterNameDisc
 	private static final boolean kotlinPresent =
 			ClassUtils.isPresent("kotlin.Unit", DefaultParameterNameDiscoverer.class.getClassLoader());
 
+
 	public DefaultParameterNameDiscoverer() {
 		if (kotlinPresent) {
 			addDiscoverer(new KotlinReflectionParameterNameDiscoverer());

spring-jdbc/src/main/java/org/springframework/jdbc/datasource/ConnectionHolder.java

@@ -25,9 +25,9 @@ import org.springframework.transaction.support.ResourceHolderSupport;
 import org.springframework.util.Assert;
 
 /**
- * Connection holder, wrapping a JDBC Connection.
+ * Resource holder wrapping a JDBC {@link Connection}.
  * {@link DataSourceTransactionManager} binds instances of this class
- * to the thread, for a specific DataSource.
+ * to the thread, for a specific {@link javax.sql.DataSource}.
  *
  * <p>Inherits rollback-only support for nested JDBC transactions
  * and reference count functionality from the base class.

spring-jms/src/main/java/org/springframework/jms/connection/JmsResourceHolder.java

@@ -38,9 +38,9 @@ import org.springframework.util.CollectionUtils;
 import org.springframework.util.ReflectionUtils;
 
 /**
- * JMS resource holder, wrapping a JMS Connection and a JMS Session.
- * JmsTransactionManager binds instances of this class to the thread,
- * for a given JMS ConnectionFactory.
+ * Resource holder wrapping a JMS {@link Connection} and a JMS {@link Session}.
+ * {@link JmsTransactionManager} binds instances of this class to the thread,
+ * for a given JMS {@link ConnectionFactory}.
  *
  * <p>Note: This is an SPI class, not intended to be used by applications.
  *

spring-jms/src/main/java/org/springframework/jms/listener/LocallyExposedJmsResourceHolder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2008 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -21,7 +21,7 @@ import javax.jms.Session;
 import org.springframework.jms.connection.JmsResourceHolder;
 
 /**
- * JmsResourceHolder marker subclass that indicates local exposure,
+ * {@link JmsResourceHolder} marker subclass that indicates local exposure,
  * i.e. that does not indicate an externally managed transaction.
  *
  * @author Juergen Hoeller

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

@@ -203,7 +203,7 @@ public class HibernateTransactionManager extends AbstractPlatformTransactionMana
 	 * @see org.springframework.jdbc.core.JdbcTemplate
 	 */
 	public void setDataSource(@Nullable DataSource dataSource) {
-		if (dataSource != null && dataSource instanceof TransactionAwareDataSourceProxy) {
+		if (dataSource instanceof TransactionAwareDataSourceProxy) {
 			// If we got a TransactionAwareDataSourceProxy, we need to perform transactions
 			// for its underlying target DataSource, else data access code won't see
 			// properly exposed transactions (i.e. transactions for the target DataSource).

spring-orm/src/main/java/org/springframework/orm/jpa/JpaTransactionManager.java

@@ -255,7 +255,7 @@ public class JpaTransactionManager extends AbstractPlatformTransactionManager
 	 * @see org.springframework.jdbc.core.JdbcTemplate
 	 */
 	public void setDataSource(@Nullable DataSource dataSource) {
-		if (dataSource != null && dataSource instanceof TransactionAwareDataSourceProxy) {
+		if (dataSource instanceof TransactionAwareDataSourceProxy) {
 			// If we got a TransactionAwareDataSourceProxy, we need to perform transactions
 			// for its underlying target DataSource, else data access code won't see
 			// properly exposed transactions (i.e. transactions for the target DataSource).

spring-tx/src/main/java/org/springframework/jca/cci/connection/ConnectionHolder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -21,10 +21,9 @@ import javax.resource.cci.Connection;
 import org.springframework.transaction.support.ResourceHolderSupport;
 
 /**
- * Connection holder, wrapping a CCI Connection.
- *
- * <p>CciLocalTransactionManager binds instances of this class
- * to the thread, for a given ConnectionFactory.
+ * Resource holder wrapping a CCI {@link Connection}.
+ * {@link CciLocalTransactionManager} binds instances of this class to the thread,
+ * for a given {@link javax.resource.cci.ConnectionFactory}.
  *
  * <p>Note: This is an SPI class, not intended to be used by applications.
  *
@@ -38,10 +37,12 @@ public class ConnectionHolder extends ResourceHolderSupport {
 
 	private final Connection connection;
 
+
 	public ConnectionHolder(Connection connection) {
 		this.connection = connection;
 	}
 
+
 	public Connection getConnection() {
 		return this.connection;
 	}