Support for Hibernate ORM 5.2

Issue: SPR-14327

build.gradle

@@ -46,7 +46,7 @@ configure(allprojects) { project ->
 	ext.hamcrestVersion      = "1.3"
 	ext.hibernate3Version    = "3.6.10.Final"
 	ext.hibernate4Version    = "4.3.11.Final"
-	ext.hibernate5Version    = "5.1.0.Final"
+	ext.hibernate5Version    = "5.2.0.Final"
 	ext.hibval4Version       = "4.3.2.Final"
 	ext.hibval5Version       = "5.2.4.Final"
 	ext.hsqldbVersion        = "2.3.4"
@@ -798,7 +798,6 @@ project("spring-orm-hibernate5") {
 		provided(project(":spring-tx"))
 		optional(project(":spring-web"))
 		optional("org.hibernate:hibernate-core:${hibernate5Version}")
-		optional("org.hibernate:hibernate-entitymanager:${hibernate5Version}")
 		optional("javax.servlet:javax.servlet-api:3.0.1")
 		optional("javax.transaction:javax.transaction-api:${jtaVersion}")
 	}

spring-orm-hibernate4/src/main/java/org/springframework/orm/hibernate4/HibernateTransactionManager.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -480,7 +480,7 @@ public class HibernateTransactionManager extends AbstractPlatformTransactionMana
 			if (!definition.isReadOnly() && !txObject.isNewSession()) {
 				// We need AUTO or COMMIT for a non-read-only transaction.
 				FlushMode flushMode = session.getFlushMode();
-				if (session.getFlushMode().equals(FlushMode.MANUAL)) {
+				if (FlushMode.MANUAL.equals(flushMode)) {
 					session.setFlushMode(FlushMode.AUTO);
 					txObject.getSessionHolder().setPreviousFlushMode(flushMode);
 				}

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -27,7 +27,6 @@ import java.util.List;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-
 import org.hibernate.Criteria;
 import org.hibernate.Filter;
 import org.hibernate.FlushMode;
@@ -35,7 +34,6 @@ import org.hibernate.Hibernate;
 import org.hibernate.HibernateException;
 import org.hibernate.LockMode;
 import org.hibernate.LockOptions;
-import org.hibernate.Query;
 import org.hibernate.ReplicationMode;
 import org.hibernate.Session;
 import org.hibernate.SessionFactory;
@@ -211,7 +209,7 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 	 * <p>To specify the query region to be used for queries cached
 	 * by this template, set the "queryCacheRegion" property.
 	 * @see #setQueryCacheRegion
-	 * @see Query#setCacheable
+	 * @see org.hibernate.Query#setCacheable
 	 * @see Criteria#setCacheable
 	 */
 	public void setCacheQueries(boolean cacheQueries) {
@@ -232,7 +230,7 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 	 * <p>The cache region will not take effect unless queries created by this
 	 * template are configured to be cached via the "cacheQueries" property.
 	 * @see #setCacheQueries
-	 * @see Query#setCacheRegion
+	 * @see org.hibernate.Query#setCacheRegion
 	 * @see Criteria#setCacheRegion
 	 */
 	public void setQueryCacheRegion(String queryCacheRegion) {
@@ -317,6 +315,7 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 	 * @return a result object returned by the action, or {@code null}
 	 * @throws DataAccessException in case of Hibernate errors
 	 */
+	@SuppressWarnings("deprecation")
 	protected <T> T doExecute(HibernateCallback<T> action, boolean enforceNativeSession) throws DataAccessException {
 		Assert.notNull(action, "Callback object must not be null");
 
@@ -499,7 +498,7 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 	public <T> List<T> loadAll(final Class<T> entityClass) throws DataAccessException {
 		return executeWithNativeSession(new HibernateCallback<List<T>>() {
 			@Override
-			@SuppressWarnings("unchecked")
+			@SuppressWarnings({"unchecked", "deprecation"})
 			public List<T> doInHibernate(Session session) throws HibernateException {
 				Criteria criteria = session.createCriteria(entityClass);
 				criteria.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
@@ -862,8 +861,9 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 	public List<?> find(final String queryString, final Object... values) throws DataAccessException {
 		return executeWithNativeSession(new HibernateCallback<List<?>>() {
 			@Override
+			@SuppressWarnings({"rawtypes", "deprecation"})
 			public List<?> doInHibernate(Session session) throws HibernateException {
-				Query queryObject = session.createQuery(queryString);
+				org.hibernate.Query queryObject = session.createQuery(queryString);
 				prepareQuery(queryObject);
 				if (values != null) {
 					for (int i = 0; i < values.length; i++) {
@@ -891,13 +891,12 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 		}
 		return executeWithNativeSession(new HibernateCallback<List<?>>() {
 			@Override
+			@SuppressWarnings({"rawtypes", "deprecation"})
 			public List<?> doInHibernate(Session session) throws HibernateException {
-				Query queryObject = session.createQuery(queryString);
+				org.hibernate.Query queryObject = session.createQuery(queryString);
 				prepareQuery(queryObject);
-				if (values != null) {
+				for (int i = 0; i < values.length; i++) {
-					for (int i = 0; i < values.length; i++) {
+					applyNamedParameterToQuery(queryObject, paramNames[i], values[i]);
-						applyNamedParameterToQuery(queryObject, paramNames[i], values[i]);
-					}
 				}
 				return queryObject.list();
 			}
@@ -910,8 +909,9 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 
 		return executeWithNativeSession(new HibernateCallback<List<?>>() {
 			@Override
+			@SuppressWarnings({"rawtypes", "deprecation"})
 			public List<?> doInHibernate(Session session) throws HibernateException {
-				Query queryObject = session.createQuery(queryString);
+				org.hibernate.Query queryObject = session.createQuery(queryString);
 				prepareQuery(queryObject);
 				queryObject.setProperties(valueBean);
 				return queryObject.list();
@@ -928,8 +928,9 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 	public List<?> findByNamedQuery(final String queryName, final Object... values) throws DataAccessException {
 		return executeWithNativeSession(new HibernateCallback<List<?>>() {
 			@Override
+			@SuppressWarnings({"rawtypes", "deprecation"})
 			public List<?> doInHibernate(Session session) throws HibernateException {
-				Query queryObject = session.getNamedQuery(queryName);
+				org.hibernate.Query queryObject = session.getNamedQuery(queryName);
 				prepareQuery(queryObject);
 				if (values != null) {
 					for (int i = 0; i < values.length; i++) {
@@ -958,8 +959,9 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 		}
 		return executeWithNativeSession(new HibernateCallback<List<?>>() {
 			@Override
+			@SuppressWarnings({"rawtypes", "deprecation"})
 			public List<?> doInHibernate(Session session) throws HibernateException {
-				Query queryObject = session.getNamedQuery(queryName);
+				org.hibernate.Query queryObject = session.getNamedQuery(queryName);
 				prepareQuery(queryObject);
 				if (values != null) {
 					for (int i = 0; i < values.length; i++) {
@@ -977,8 +979,9 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 
 		return executeWithNativeSession(new HibernateCallback<List<?>>() {
 			@Override
+			@SuppressWarnings({"rawtypes", "deprecation"})
 			public List<?> doInHibernate(Session session) throws HibernateException {
-				Query queryObject = session.getNamedQuery(queryName);
+				org.hibernate.Query queryObject = session.getNamedQuery(queryName);
 				prepareQuery(queryObject);
 				queryObject.setProperties(valueBean);
 				return queryObject.list();
@@ -1033,6 +1036,7 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 	}
 
 	@Override
+	@SuppressWarnings("deprecation")
 	public <T> List<T> findByExample(
 			final String entityName, final T exampleEntity, final int firstResult, final int maxResults)
 			throws DataAccessException {
@@ -1066,8 +1070,9 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 	public Iterator<?> iterate(final String queryString, final Object... values) throws DataAccessException {
 		return executeWithNativeSession(new HibernateCallback<Iterator<?>>() {
 			@Override
+			@SuppressWarnings({"rawtypes", "deprecation"})
 			public Iterator<?> doInHibernate(Session session) throws HibernateException {
-				Query queryObject = session.createQuery(queryString);
+				org.hibernate.Query queryObject = session.createQuery(queryString);
 				prepareQuery(queryObject);
 				if (values != null) {
 					for (int i = 0; i < values.length; i++) {
@@ -1093,8 +1098,9 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 	public int bulkUpdate(final String queryString, final Object... values) throws DataAccessException {
 		return executeWithNativeSession(new HibernateCallback<Integer>() {
 			@Override
+			@SuppressWarnings({"rawtypes", "deprecation"})
 			public Integer doInHibernate(Session session) throws HibernateException {
-				Query queryObject = session.createQuery(queryString);
+				org.hibernate.Query queryObject = session.createQuery(queryString);
 				prepareQuery(queryObject);
 				if (values != null) {
 					for (int i = 0; i < values.length; i++) {
@@ -1122,7 +1128,7 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 	 * @see FlushMode#MANUAL
 	 */
 	protected void checkWriteOperationAllowed(Session session) throws InvalidDataAccessApiUsageException {
-		if (isCheckWriteOperations() && session.getFlushMode().lessThan(FlushMode.COMMIT)) {
+		if (isCheckWriteOperations() && SessionFactoryUtils.getFlushMode(session).lessThan(FlushMode.COMMIT)) {
 			throw new InvalidDataAccessApiUsageException(
 					"Write operations are not allowed in read-only mode (FlushMode.MANUAL): "+
 					"Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition.");
@@ -1136,7 +1142,8 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 	 * @see #setCacheQueries
 	 * @see #setQueryCacheRegion
 	 */
-	protected void prepareQuery(Query queryObject) {
+	@SuppressWarnings({"rawtypes", "deprecation"})
+	protected void prepareQuery(org.hibernate.Query queryObject) {
 		if (isCacheQueries()) {
 			queryObject.setCacheable(true);
 			if (getQueryCacheRegion() != null) {
@@ -1192,7 +1199,8 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 	 * @param value the value of the parameter
 	 * @throws HibernateException if thrown by the Query object
 	 */
-	protected void applyNamedParameterToQuery(Query queryObject, String paramName, Object value)
+	@SuppressWarnings({"rawtypes", "deprecation"})
+	protected void applyNamedParameterToQuery(org.hibernate.Query queryObject, String paramName, Object value)
 			throws HibernateException {
 
 		if (value instanceof Collection) {
@@ -1221,6 +1229,7 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 		}
 
 		@Override
+		@SuppressWarnings("deprecation")
 		public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
 			// Invocation on Session interface coming in...
 
@@ -1243,8 +1252,8 @@ public class HibernateTemplate implements HibernateOperations, InitializingBean
 
 				// If return value is a Query or Criteria, apply transaction timeout.
 				// Applies to createQuery, getNamedQuery, createCriteria.
-				if (retVal instanceof Query) {
+				if (retVal instanceof org.hibernate.Query) {
-					prepareQuery(((Query) retVal));
+					prepareQuery(((org.hibernate.Query) retVal));
 				}
 				if (retVal instanceof Criteria) {
 					prepareCriteria(((Criteria) retVal));

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -412,6 +412,7 @@ public class HibernateTransactionManager extends AbstractPlatformTransactionMana
 	}
 
 	@Override
+	@SuppressWarnings("deprecation")
 	protected void doBegin(Object transaction, TransactionDefinition definition) {
 		HibernateTransactionObject txObject = (HibernateTransactionObject) transaction;
 
@@ -476,8 +477,8 @@ public class HibernateTransactionManager extends AbstractPlatformTransactionMana
 
 			if (!definition.isReadOnly() && !txObject.isNewSession()) {
 				// We need AUTO or COMMIT for a non-read-only transaction.
-				FlushMode flushMode = session.getFlushMode();
+				FlushMode flushMode = SessionFactoryUtils.getFlushMode(session);
-				if (session.getFlushMode().equals(FlushMode.MANUAL)) {
+				if (FlushMode.MANUAL.equals(flushMode)) {
 					session.setFlushMode(FlushMode.AUTO);
 					txObject.getSessionHolder().setPreviousFlushMode(flushMode);
 				}
@@ -627,6 +628,7 @@ public class HibernateTransactionManager extends AbstractPlatformTransactionMana
 	}
 
 	@Override
+	@SuppressWarnings("deprecation")
 	protected void doCleanupAfterCompletion(Object transaction) {
 		HibernateTransactionObject txObject = (HibernateTransactionObject) transaction;
 
@@ -703,6 +705,7 @@ public class HibernateTransactionManager extends AbstractPlatformTransactionMana
 	 * @param session the Hibernate Session to check
 	 * @see ConnectionReleaseMode#ON_CLOSE
 	 */
+	@SuppressWarnings("deprecation")
 	protected boolean isSameConnectionForEntireSession(Session session) {
 		if (!(session instanceof SessionImplementor)) {
 			// The best we can do is to assume we're safe.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -16,10 +16,12 @@
 
 package org.springframework.orm.hibernate5;
 
+import java.lang.reflect.Method;
 import javax.sql.DataSource;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.hibernate.FlushMode;
 import org.hibernate.HibernateException;
 import org.hibernate.JDBCException;
 import org.hibernate.NonUniqueObjectException;
@@ -59,6 +61,8 @@ import org.springframework.dao.InvalidDataAccessApiUsageException;
 import org.springframework.dao.InvalidDataAccessResourceUsageException;
 import org.springframework.dao.PessimisticLockingFailureException;
 import org.springframework.jdbc.datasource.DataSourceUtils;
+import org.springframework.util.Assert;
+import org.springframework.util.ReflectionUtils;
 
 /**
  * Helper class featuring methods for Hibernate Session handling.
@@ -86,6 +90,57 @@ public abstract class SessionFactoryUtils {
 	static final Log logger = LogFactory.getLog(SessionFactoryUtils.class);
 
 
+	private static Method getFlushMode;
+
+	static {
+		try {
+			// Hibernate 5.2+ getHibernateFlushMode()
+			getFlushMode = Session.class.getMethod("getHibernateFlushMode");
+		}
+		catch (NoSuchMethodException ex) {
+			try {
+				// Hibernate 5.0/5.1 getFlushMode() with FlushMode return type
+				getFlushMode = Session.class.getMethod("getFlushMode");
+			}
+			catch (NoSuchMethodException ex2) {
+				throw new IllegalStateException("No compatible Hibernate getFlushMode signature found", ex2);
+			}
+		}
+		// Check that it is the Hibernate FlushMode type, not JPA's...
+		Assert.state(FlushMode.class == getFlushMode.getReturnType());
+	}
+
+
+	/**
+	 * Get the native Hibernate FlushMode, adapting between Hibernate 5.0/5.1 and 5.2+.
+	 * @param session the Hibernate Session to get the flush mode from
+	 * @return the FlushMode (never {@code null})
+	 * @since 4.3
+	 */
+	static FlushMode getFlushMode(Session session) {
+		return (FlushMode) ReflectionUtils.invokeMethod(getFlushMode, session);
+	}
+
+	/**
+	 * Perform actual closing of the Hibernate Session,
+	 * catching and logging any cleanup exceptions thrown.
+	 * @param session the Hibernate Session to close (may be {@code null})
+	 * @see Session#close()
+	 */
+	public static void closeSession(Session session) {
+		if (session != null) {
+			try {
+				session.close();
+			}
+			catch (HibernateException ex) {
+				logger.debug("Could not close Hibernate Session", ex);
+			}
+			catch (Throwable ex) {
+				logger.debug("Unexpected exception on closing Hibernate Session", ex);
+			}
+		}
+	}
+
 	/**
 	 * Determine the DataSource of the given SessionFactory.
 	 * @param sessionFactory the SessionFactory to check
@@ -114,26 +169,6 @@ public abstract class SessionFactoryUtils {
 		return null;
 	}
 
-	/**
-	 * Perform actual closing of the Hibernate Session,
-	 * catching and logging any cleanup exceptions thrown.
-	 * @param session the Hibernate Session to close (may be {@code null})
-	 * @see Session#close()
-	 */
-	public static void closeSession(Session session) {
-		if (session != null) {
-			try {
-				session.close();
-			}
-			catch (HibernateException ex) {
-				logger.debug("Could not close Hibernate Session", ex);
-			}
-			catch (Throwable ex) {
-				logger.debug("Unexpected exception on closing Hibernate Session", ex);
-			}
-		}
-	}
-
 	/**
 	 * Convert the given HibernateException to an appropriate exception
 	 * from the {@code org.springframework.dao} hierarchy.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -38,6 +38,7 @@ public class SpringJtaSessionContext extends JTASessionContext {
 	}
 
 	@Override
+	@SuppressWarnings("deprecation")
 	protected Session buildOrObtainSession() {
 		Session session = super.buildOrObtainSession();
 		if (TransactionSynchronizationManager.isCurrentTransactionReadOnly()) {

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -76,6 +76,7 @@ public class SpringSessionContext implements CurrentSessionContext {
 	 * Retrieve the Spring-managed Session for the current thread, if any.
 	 */
 	@Override
+	@SuppressWarnings("deprecation")
 	public Session currentSession() throws HibernateException {
 		Object value = TransactionSynchronizationManager.getResource(this.sessionFactory);
 		if (value instanceof Session) {
@@ -91,7 +92,7 @@ public class SpringSessionContext implements CurrentSessionContext {
 				sessionHolder.setSynchronizedWithTransaction(true);
 				// Switch to FlushMode.AUTO, as we have to assume a thread-bound Session
 				// with FlushMode.MANUAL, which needs to allow flushing within the transaction.
-				FlushMode flushMode = session.getFlushMode();
+				FlushMode flushMode = SessionFactoryUtils.getFlushMode(session);
 				if (flushMode.equals(FlushMode.MANUAL) &&
 						!TransactionSynchronizationManager.isCurrentTransactionReadOnly()) {
 					session.setFlushMode(FlushMode.AUTO);

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -111,6 +111,7 @@ public class SpringSessionSynchronization implements TransactionSynchronization,
 	}
 
 	@Override
+	@SuppressWarnings("deprecation")
 	public void beforeCompletion() {
 		try {
 			Session session = this.sessionHolder.getSession();

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -199,6 +199,7 @@ public class OpenSessionInViewFilter extends OncePerRequestFilter {
 	 * @throws DataAccessResourceFailureException if the Session could not be created
 	 * @see FlushMode#MANUAL
 	 */
+	@SuppressWarnings("deprecation")
 	protected Session openSession(SessionFactory sessionFactory) throws DataAccessResourceFailureException {
 		try {
 			Session session = sessionFactory.openSession();

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -179,6 +179,7 @@ public class OpenSessionInViewInterceptor implements AsyncWebRequestInterceptor
 	 * @throws DataAccessResourceFailureException if the Session could not be created
 	 * @see FlushMode#MANUAL
 	 */
+	@SuppressWarnings("deprecation")
 	protected Session openSession() throws DataAccessResourceFailureException {
 		try {
 			Session session = getSessionFactory().openSession();

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -102,6 +102,7 @@ public class OpenSessionInterceptor implements MethodInterceptor, InitializingBe
 	 * @throws DataAccessResourceFailureException if the Session could not be created
 	 * @see FlushMode#MANUAL
 	 */
+	@SuppressWarnings("deprecation")
 	protected Session openSession() throws DataAccessResourceFailureException {
 		try {
 			Session session = getSessionFactory().openSession();

spring-orm/src/main/java/org/springframework/orm/jpa/vendor/HibernateJpaDialect.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -66,13 +66,14 @@ import org.springframework.orm.jpa.JpaSystemException;
 import org.springframework.transaction.InvalidIsolationLevelException;
 import org.springframework.transaction.TransactionDefinition;
 import org.springframework.transaction.TransactionException;
+import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
 import org.springframework.util.ReflectionUtils;
 
 /**
  * {@link org.springframework.orm.jpa.JpaDialect} implementation for
  * Hibernate EntityManager. Developed and tested against Hibernate 3.6,
- * 4.2/4.3 as well as 5.0.
+ * 4.2/4.3 as well as 5.0/5.1/5.2.
  *
  * @author Juergen Hoeller
  * @author Costin Leau
@@ -88,6 +89,8 @@ public class HibernateJpaDialect extends DefaultJpaDialect {
 
 	private static Class<?> pessimisticLockExceptionClass;
 
+	private static Method getFlushMode;
+
 	static {
 		// Checking for Hibernate 4.x's Optimistic/PessimisticEntityLockException
 		ClassLoader cl = HibernateJpaDialect.class.getClassLoader();
@@ -104,6 +107,22 @@ public class HibernateJpaDialect extends DefaultJpaDialect {
 		catch (ClassNotFoundException ex) {
 			pessimisticLockExceptionClass = null;
 		}
+
+		try {
+			// Hibernate 5.2+ getHibernateFlushMode()
+			getFlushMode = Session.class.getMethod("getHibernateFlushMode");
+		}
+		catch (NoSuchMethodException ex) {
+			try {
+				// Classic Hibernate getFlushMode() with FlushMode return type
+				getFlushMode = Session.class.getMethod("getFlushMode");
+			}
+			catch (NoSuchMethodException ex2) {
+				throw new IllegalStateException("No compatible Hibernate getFlushMode signature found", ex2);
+			}
+		}
+		// Check that it is the Hibernate FlushMode type, not JPA's...
+		Assert.state(FlushMode.class == getFlushMode.getReturnType());
 	}
 
 
@@ -184,7 +203,7 @@ public class HibernateJpaDialect extends DefaultJpaDialect {
 	}
 
 	protected FlushMode prepareFlushMode(Session session, boolean readOnly) throws PersistenceException {
-		FlushMode flushMode = session.getFlushMode();
+		FlushMode flushMode = (FlushMode) ReflectionUtils.invokeMethod(getFlushMode, session);
 		if (readOnly) {
 			// We should suppress flushing for a read-only transaction.
 			if (!flushMode.equals(FlushMode.MANUAL)) {

spring-orm/src/main/java/org/springframework/orm/jpa/vendor/HibernateJpaVendorAdapter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -35,7 +35,7 @@ import org.hibernate.dialect.SQLServerDialect;
 
 /**
  * {@link org.springframework.orm.jpa.JpaVendorAdapter} implementation for Hibernate
- * EntityManager. Developed and tested against Hibernate 3.6, 4.2/4.3 as well as 5.0.
+ * EntityManager. Developed and tested against Hibernate 3.6, 4.2/4.3 as well as 5.x.
  * <b>Hibernate 4.2+ is strongly recommended for use with Spring 4.0+.</b>
  *
  * <p>Exposes Hibernate's persistence provider and EntityManager extension interface,