Adopt Hiberate's CamelCaseToUnderscoresNamingStrategy

Closes gh-27352

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/orm/jpa/HibernateProperties.java

@@ -21,11 +21,11 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.function.Supplier;
 
+import org.hibernate.boot.model.naming.CamelCaseToUnderscoresNamingStrategy;
 import org.hibernate.cfg.AvailableSettings;
 
 import org.springframework.boot.context.properties.ConfigurationProperties;
 import org.springframework.boot.orm.jpa.hibernate.SpringImplicitNamingStrategy;
-import org.springframework.boot.orm.jpa.hibernate.SpringPhysicalNamingStrategy;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
 import org.springframework.util.ObjectUtils;
@@ -175,7 +175,7 @@ public class HibernateProperties {
 			applyNamingStrategy(properties, AvailableSettings.IMPLICIT_NAMING_STRATEGY, this.implicitStrategy,
 					SpringImplicitNamingStrategy.class.getName());
 			applyNamingStrategy(properties, AvailableSettings.PHYSICAL_NAMING_STRATEGY, this.physicalStrategy,
-					SpringPhysicalNamingStrategy.class.getName());
+					CamelCaseToUnderscoresNamingStrategy.class.getName());
 		}
 
 		private void applyNamingStrategy(Map<String, Object> properties, String key, Object strategy,

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfigurationTests.java

@@ -37,6 +37,7 @@ import javax.transaction.TransactionManager;
 import javax.transaction.UserTransaction;
 
 import com.zaxxer.hikari.HikariDataSource;
+import org.hibernate.boot.model.naming.CamelCaseToUnderscoresNamingStrategy;
 import org.hibernate.boot.model.naming.ImplicitNamingStrategy;
 import org.hibernate.boot.model.naming.PhysicalNamingStrategy;
 import org.hibernate.cfg.AvailableSettings;
@@ -61,7 +62,6 @@ import org.springframework.boot.autoconfigure.orm.jpa.test.City;
 import org.springframework.boot.autoconfigure.transaction.jta.JtaAutoConfiguration;
 import org.springframework.boot.orm.jpa.hibernate.SpringImplicitNamingStrategy;
 import org.springframework.boot.orm.jpa.hibernate.SpringJtaPlatform;
-import org.springframework.boot.orm.jpa.hibernate.SpringPhysicalNamingStrategy;
 import org.springframework.boot.sql.init.dependency.DependsOnDatabaseInitialization;
 import org.springframework.boot.test.context.assertj.AssertableApplicationContext;
 import org.springframework.boot.test.context.runner.ContextConsumer;
@@ -534,7 +534,7 @@ class HibernateJpaAutoConfigurationTests extends AbstractJpaAutoConfigurationTes
 
 		@Bean
 		PhysicalNamingStrategy testPhysicalNamingStrategy() {
-			return new SpringPhysicalNamingStrategy();
+			return new CamelCaseToUnderscoresNamingStrategy();
 		}
 
 	}
@@ -542,7 +542,7 @@ class HibernateJpaAutoConfigurationTests extends AbstractJpaAutoConfigurationTes
 	@Configuration(proxyBeanMethods = false)
 	static class TestHibernatePropertiesCustomizerConfiguration {
 
-		private final PhysicalNamingStrategy physicalNamingStrategy = new SpringPhysicalNamingStrategy();
+		private final PhysicalNamingStrategy physicalNamingStrategy = new CamelCaseToUnderscoresNamingStrategy();
 
 		private final ImplicitNamingStrategy implicitNamingStrategy = new SpringImplicitNamingStrategy();
 

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/orm/jpa/HibernatePropertiesTests.java

@@ -20,6 +20,7 @@ import java.util.Map;
 import java.util.function.Consumer;
 import java.util.function.Supplier;
 
+import org.hibernate.boot.model.naming.CamelCaseToUnderscoresNamingStrategy;
 import org.hibernate.cfg.AvailableSettings;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
@@ -28,7 +29,6 @@ import org.mockito.junit.jupiter.MockitoExtension;
 
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.boot.orm.jpa.hibernate.SpringImplicitNamingStrategy;
-import org.springframework.boot.orm.jpa.hibernate.SpringPhysicalNamingStrategy;
 import org.springframework.boot.test.context.assertj.AssertableApplicationContext;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.boot.test.context.runner.ContextConsumer;
@@ -60,7 +60,7 @@ class HibernatePropertiesTests {
 		this.contextRunner.run(assertHibernateProperties((hibernateProperties) -> {
 			assertThat(hibernateProperties).doesNotContainKeys("hibernate.ejb.naming_strategy");
 			assertThat(hibernateProperties).containsEntry(AvailableSettings.PHYSICAL_NAMING_STRATEGY,
-					SpringPhysicalNamingStrategy.class.getName());
+					CamelCaseToUnderscoresNamingStrategy.class.getName());
 			assertThat(hibernateProperties).containsEntry(AvailableSettings.IMPLICIT_NAMING_STRATEGY,
 					SpringImplicitNamingStrategy.class.getName());
 		}));

spring-boot-project/spring-boot-docs/src/main/java/org/springframework/boot/docs/howto/dataaccess/configurehibernatenamingstrategy/spring/MyHibernateConfiguration.java

@@ -16,9 +16,9 @@
 
 package org.springframework.boot.docs.howto.dataaccess.configurehibernatenamingstrategy.spring;
 
+import org.hibernate.boot.model.naming.CamelCaseToUnderscoresNamingStrategy;
 import org.hibernate.engine.jdbc.env.spi.JdbcEnvironment;
 
-import org.springframework.boot.orm.jpa.hibernate.SpringPhysicalNamingStrategy;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
@@ -26,8 +26,8 @@ import org.springframework.context.annotation.Configuration;
 public class MyHibernateConfiguration {
 
 	@Bean
-	public SpringPhysicalNamingStrategy caseSensitivePhysicalNamingStrategy() {
-		return new SpringPhysicalNamingStrategy() {
+	public CamelCaseToUnderscoresNamingStrategy caseSensitivePhysicalNamingStrategy() {
+		return new CamelCaseToUnderscoresNamingStrategy() {
 
 			@Override
 			protected boolean isCaseInsensitive(JdbcEnvironment jdbcEnvironment) {

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/orm/jpa/hibernate/SpringPhysicalNamingStrategy.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2021 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.
@@ -18,6 +18,7 @@ package org.springframework.boot.orm.jpa.hibernate;
 
 import java.util.Locale;
 
+import org.hibernate.boot.model.naming.CamelCaseToUnderscoresNamingStrategy;
 import org.hibernate.boot.model.naming.Identifier;
 import org.hibernate.boot.model.naming.PhysicalNamingStrategy;
 import org.hibernate.engine.jdbc.env.spi.JdbcEnvironment;
@@ -29,7 +30,10 @@ import org.hibernate.engine.jdbc.env.spi.JdbcEnvironment;
  * @author Phillip Webb
  * @author Madhura Bhave
  * @since 1.4.0
+ * @deprecated since 2.6.0 for removal in 2.8.0 in favor of
+ * {@link CamelCaseToUnderscoresNamingStrategy}
  */
+@Deprecated
 public class SpringPhysicalNamingStrategy implements PhysicalNamingStrategy {
 
 	@Override

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/orm/jpa/hibernate/SpringPhysicalNamingStrategyTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2021 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.
@@ -35,6 +35,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  * @author Phillip Webb
  * @author Madhura Bhave
  */
+@Deprecated
 class SpringPhysicalNamingStrategyTests {
 
 	private Metadata metadata;