BAEL-6319 Hibernate 6 Boolean Converters (#13894)

Co-authored-by: Mariusz Kaczmarczyk <to@mariu.sh>

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/hibernate/HibernateUtil.java

@@ -1,4 +1,6 @@
-package com.baeldung;
+package com.baeldung.hibernate;
+
+import static org.hibernate.boot.registry.StandardServiceRegistryBuilder.DEFAULT_CFG_RESOURCE_NAME;
 
 import org.hibernate.SessionFactory;
 import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
@@ -7,19 +9,20 @@ import org.hibernate.service.ServiceRegistry;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import com.baeldung.manytomany.model.Employee;
-import com.baeldung.manytomany.model.Project;
-import com.baeldung.uuids.WebSiteUser;
-import com.baeldung.uuids.Element;
-import com.baeldung.uuids.Reservation;
-import com.baeldung.uuids.Sale;
+import com.baeldung.hibernate.booleanconverters.model.Question;
+import com.baeldung.hibernate.manytomany.model.Employee;
+import com.baeldung.hibernate.manytomany.model.Project;
+import com.baeldung.hibernate.uuids.WebSiteUser;
+import com.baeldung.hibernate.uuids.Element;
+import com.baeldung.hibernate.uuids.Reservation;
+import com.baeldung.hibernate.uuids.Sale;
 
 public class HibernateUtil {
 
+    private static final String DEFAULT_RESOURCE = "manytomany.cfg.xml";
     private static final Logger LOGGER = LoggerFactory.getLogger(HibernateUtil.class);
-    private static SessionFactory sessionFactory;
 
-    private static SessionFactory buildSessionFactory() {
+    private static SessionFactory buildSessionFactory(String resource) {
         try {
             // Create the SessionFactory from hibernate-annotation.cfg.xml
             Configuration configuration = new Configuration();
@@ -29,16 +32,16 @@ public class HibernateUtil {
             configuration.addAnnotatedClass(Element.class);
             configuration.addAnnotatedClass(Reservation.class);
             configuration.addAnnotatedClass(Sale.class);
-            configuration.configure("manytomany.cfg.xml");
+            configuration.addAnnotatedClass(Question.class);
+            configuration.addPackage(Question.class.getPackageName());
+            configuration.configure(resource);
             LOGGER.debug("Hibernate Annotation Configuration loaded");
 
             ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties())
                     .build();
             LOGGER.debug("Hibernate Annotation serviceRegistry created");
 
-            SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);
-
-            return sessionFactory;
+            return configuration.buildSessionFactory(serviceRegistry);
         } catch (Throwable ex) {
             LOGGER.error("Initial SessionFactory creation failed.", ex);
             throw new ExceptionInInitializerError(ex);
@@ -46,9 +49,10 @@ public class HibernateUtil {
     }
 
     public static SessionFactory getSessionFactory() {
-        if (sessionFactory == null) {
-            sessionFactory = buildSessionFactory();
+        return buildSessionFactory(DEFAULT_RESOURCE);
     }
-        return sessionFactory;
+
+    public static SessionFactory getSessionFactory(String resource) {
+        return buildSessionFactory(resource);
     }
 }

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/hibernate/booleanconverters/model/Question.java

@@ -0,0 +1,86 @@
+package com.baeldung.hibernate.booleanconverters.model;
+
+import java.util.UUID;
+
+import org.hibernate.type.NumericBooleanConverter;
+import org.hibernate.type.TrueFalseConverter;
+import org.hibernate.type.YesNoConverter;
+
+import jakarta.persistence.Convert;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+
+@Entity
+public class Question {
+
+    @Id
+    private UUID id;
+    private String content;
+    @Convert(converter = YesNoConverter.class)
+    private Boolean correctAnswer;
+    @Convert(converter = TrueFalseConverter.class)
+    private Boolean shouldBeAsked;
+    @Convert(converter = NumericBooleanConverter.class)
+    private Boolean isEasy;
+    private Boolean wasAskedBefore;
+
+    public Question() {
+    }
+
+    public Question(UUID id, String content, Boolean correctAnswer, Boolean shouldBeAsked, Boolean isEasy, Boolean wasAskedBefore) {
+        this.id = id;
+        this.content = content;
+        this.correctAnswer = correctAnswer;
+        this.shouldBeAsked = shouldBeAsked;
+        this.isEasy = isEasy;
+        this.wasAskedBefore = wasAskedBefore;
+    }
+
+    public UUID getId() {
+        return id;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public Boolean getCorrectAnswer() {
+        return correctAnswer;
+    }
+
+    public Boolean getShouldBeAsked() {
+        return shouldBeAsked;
+    }
+
+    public Boolean isEasy() {
+        return isEasy;
+    }
+
+    public Boolean getWasAskedBefore() {
+        return wasAskedBefore;
+    }
+
+    public void setId(UUID id) {
+        this.id = id;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+
+    public void setCorrectAnswer(Boolean correctAnswer) {
+        this.correctAnswer = correctAnswer;
+    }
+
+    public void setShouldBeAsked(Boolean shouldBeAsked) {
+        this.shouldBeAsked = shouldBeAsked;
+    }
+
+    public void setEasy(Boolean easy) {
+        isEasy = easy;
+    }
+
+    public void setWasAskedBefore(Boolean wasAskedBefore) {
+        this.wasAskedBefore = wasAskedBefore;
+    }
+}

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/hibernate/booleanconverters/model/package-info.java

@@ -0,0 +1,5 @@
+@ConverterRegistration(converter = YesNoConverter.class)
+package com.baeldung.hibernate.booleanconverters.model;
+
+import org.hibernate.annotations.ConverterRegistration;
+import org.hibernate.type.YesNoConverter;

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/hibernate/manytomany/PersistenceConfig.java

@@ -1,4 +1,4 @@
-package com.baeldung.manytomany;
+package com.baeldung.hibernate.manytomany;
 
 import java.util.Properties;
 
@@ -22,7 +22,7 @@ import org.springframework.transaction.annotation.EnableTransactionManagement;
 @Configuration
 @EnableTransactionManagement
 @PropertySource({ "classpath:persistence-h2.properties" })
-@ComponentScan({ "com.baeldung.manytomany" })
+@ComponentScan({ "com.baeldung.hibernate.manytomany" })
 public class PersistenceConfig {
 
     @Autowired
@@ -32,7 +32,7 @@ public class PersistenceConfig {
     public LocalSessionFactoryBean sessionFactory() {
         final LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
         sessionFactory.setDataSource(restDataSource());
-        sessionFactory.setPackagesToScan(new String[] { "com.baeldung.manytomany" });
+        sessionFactory.setPackagesToScan(new String[] { "com.baeldung.hibernate.manytomany" });
         sessionFactory.setHibernateProperties(hibernateProperties());
 
         return sessionFactory;

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/hibernate/manytomany/dao/IEmployeeDao.java

@@ -0,0 +1,8 @@
+package com.baeldung.hibernate.manytomany.dao;
+
+import com.baeldung.hibernate.manytomany.dao.common.IOperations;
+import com.baeldung.hibernate.manytomany.model.Employee;
+
+public interface IEmployeeDao extends IOperations<Employee>{
+
+}

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/hibernate/manytomany/dao/IProjectDao.java

@@ -0,0 +1,8 @@
+package com.baeldung.hibernate.manytomany.dao;
+
+import com.baeldung.hibernate.manytomany.dao.common.IOperations;
+import com.baeldung.hibernate.manytomany.model.Project;
+
+public interface IProjectDao extends IOperations<Project>{
+
+}

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/hibernate/manytomany/dao/common/AbstractDao.java

@@ -1,4 +1,4 @@
-package com.baeldung.manytomany.dao.common;
+package com.baeldung.hibernate.manytomany.dao.common;
 
 import java.io.Serializable;
 

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/hibernate/manytomany/dao/common/AbstractHibernateDao.java

@@ -1,4 +1,4 @@
-package com.baeldung.manytomany.dao.common;
+package com.baeldung.hibernate.manytomany.dao.common;
 
 import java.io.Serializable;
 import java.util.List;

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/hibernate/manytomany/dao/common/IOperations.java

@@ -1,4 +1,4 @@
-package com.baeldung.manytomany.dao.common;
+package com.baeldung.hibernate.manytomany.dao.common;
 
 import java.io.Serializable;
 import java.util.List;

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/hibernate/manytomany/dao/impl/EmployeeDao.java

@@ -1,10 +1,10 @@
-package com.baeldung.manytomany.dao.impl;
+package com.baeldung.hibernate.manytomany.dao.impl;
 
 import org.springframework.stereotype.Repository;
 
-import com.baeldung.manytomany.dao.IEmployeeDao;
-import com.baeldung.manytomany.dao.common.AbstractHibernateDao;
-import com.baeldung.manytomany.model.Employee;
+import com.baeldung.hibernate.manytomany.dao.IEmployeeDao;
+import com.baeldung.hibernate.manytomany.dao.common.AbstractHibernateDao;
+import com.baeldung.hibernate.manytomany.model.Employee;
 
 @Repository
 public class EmployeeDao extends AbstractHibernateDao<Employee> implements IEmployeeDao {

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/hibernate/manytomany/dao/impl/ProjectDao.java

@@ -0,0 +1,17 @@
+package com.baeldung.hibernate.manytomany.dao.impl;
+
+import org.springframework.stereotype.Repository;
+
+import com.baeldung.hibernate.manytomany.dao.IProjectDao;
+import com.baeldung.hibernate.manytomany.dao.common.AbstractHibernateDao;
+import com.baeldung.hibernate.manytomany.model.Project;
+
+@Repository
+public class ProjectDao extends AbstractHibernateDao<Project> implements IProjectDao {
+
+    public ProjectDao() {
+        super();
+
+        setClazz(Project.class);
+    }
+}

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/hibernate/manytomany/model/Employee.java

@@ -1,4 +1,4 @@
-package com.baeldung.manytomany.model;
+package com.baeldung.hibernate.manytomany.model;
 
 import java.io.Serializable;
 import java.util.HashSet;

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/hibernate/manytomany/model/Project.java

@@ -1,4 +1,4 @@
-package com.baeldung.manytomany.model;
+package com.baeldung.hibernate.manytomany.model;
 
 import java.io.Serializable;
 import java.util.HashSet;

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/hibernate/uuids/Element.java

@@ -1,4 +1,4 @@
-package com.baeldung.uuids;
+package com.baeldung.hibernate.uuids;
 
 import java.util.UUID;
 import jakarta.persistence.Entity;

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/hibernate/uuids/Reservation.java

@@ -1,4 +1,4 @@
-package com.baeldung.uuids;
+package com.baeldung.hibernate.uuids;
 
 import java.util.UUID;
 import jakarta.persistence.Id;

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/hibernate/uuids/Sale.java

@@ -1,4 +1,4 @@
-package com.baeldung.uuids;
+package com.baeldung.hibernate.uuids;
 
 import jakarta.persistence.Id;
 import jakarta.persistence.Entity;

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/hibernate/uuids/WebSiteUser.java

@@ -1,4 +1,4 @@
-package com.baeldung.uuids;
+package com.baeldung.hibernate.uuids;
 
 import java.util.UUID;
 import java.time.LocalDate;

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/manytomany/dao/IEmployeeDao.java

@@ -1,8 +0,0 @@
-package com.baeldung.manytomany.dao;
-
-import com.baeldung.manytomany.dao.common.IOperations;
-import com.baeldung.manytomany.model.Employee;
-
-public interface IEmployeeDao extends IOperations<Employee>{
-
-}

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/manytomany/dao/IProjectDao.java

@@ -1,8 +0,0 @@
-package com.baeldung.manytomany.dao;
-
-import com.baeldung.manytomany.dao.common.IOperations;
-import com.baeldung.manytomany.model.Project;
-
-public interface IProjectDao extends IOperations<Project>{
-
-}

persistence-modules/hibernate-mapping-2/src/main/java/com/baeldung/manytomany/dao/impl/ProjectDao.java

@@ -1,18 +0,0 @@
-package com.baeldung.manytomany.dao.impl;
-
-import org.springframework.stereotype.Repository;
-
-import com.baeldung.manytomany.dao.IProjectDao;
-import com.baeldung.manytomany.dao.common.AbstractHibernateDao;
-import com.baeldung.manytomany.model.Project;
-
-
-@Repository
-public class ProjectDao extends AbstractHibernateDao<Project> implements IProjectDao {
-
-    public ProjectDao() {
-        super();
-
-        setClazz(Project.class);
-    }
-}

persistence-modules/hibernate-mapping-2/src/test/java/com/baeldung/SpringContextTest.java

@@ -6,7 +6,7 @@ import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 import org.springframework.test.context.support.AnnotationConfigContextLoader;
 
-import com.baeldung.manytomany.PersistenceConfig;
+import com.baeldung.hibernate.manytomany.PersistenceConfig;
 
 @RunWith(SpringJUnit4ClassRunner.class)
 @ContextConfiguration(classes = { PersistenceConfig.class }, loader = AnnotationConfigContextLoader.class)

persistence-modules/hibernate-mapping-2/src/test/java/com/baeldung/hibernate/booleanconverters/HibernateBooleanConverterIntegrationTest.java

@@ -0,0 +1,158 @@
+package com.baeldung.hibernate.booleanconverters;
+
+import static java.lang.String.format;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+import java.util.UUID;
+
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import com.baeldung.hibernate.HibernateUtil;
+import com.baeldung.hibernate.booleanconverters.model.Question;
+
+public class HibernateBooleanConverterIntegrationTest {
+
+    private static final String PROPERTY_FILE_NAME = "booleanconverters.cfg.xml";
+
+    private static SessionFactory sessionFactory;
+    private static Session session;
+
+    @BeforeAll
+    static void createSessionFactory() {
+        sessionFactory = HibernateUtil.getSessionFactory(PROPERTY_FILE_NAME);
+    }
+
+    @BeforeEach
+    void openSessionAndBeginTransaction() {
+        session = sessionFactory.openSession();
+    }
+
+    @AfterAll
+    static void closeSessionFactory() {
+        sessionFactory.close();
+    }
+
+    @Test
+    void whenFieldAnnotatedWithYesNoConverter_ThenConversionWorks() {
+        session.beginTransaction();
+        UUID likeJavaQuestionId = UUID.randomUUID();
+        UUID sydneyCapitalOfAustraliaQuestionId = UUID.randomUUID();
+        session.persist(new QuestionBuilder().id(likeJavaQuestionId)
+          .content("Do you like Java?")
+          .correctAnswer(true)
+          .build());
+        session.persist(new QuestionBuilder().id(sydneyCapitalOfAustraliaQuestionId)
+          .content("Is Sydney the capital of Australia?")
+          .correctAnswer(false)
+          .build());
+        session.flush();
+
+        char likeJavaQuestionCorrectAnswerDbValue = session.createNativeQuery(format("SELECT correctAnswer FROM Question WHERE id='%s'", likeJavaQuestionId), Character.class)
+          .getSingleResult();
+        char sydneyCapitalOfAustraliaQuestionCorrectAnswerDbValue = session.createNativeQuery(format("SELECT correctAnswer FROM Question WHERE id='%s'", sydneyCapitalOfAustraliaQuestionId), Character.class)
+          .getSingleResult();
+        session.close();
+
+        assertEquals('Y', likeJavaQuestionCorrectAnswerDbValue);
+        assertEquals('N', sydneyCapitalOfAustraliaQuestionCorrectAnswerDbValue);
+    }
+
+    @Test
+    void whenFieldAnnotatedWithTrueFalseConverter_ThenConversionWorks() {
+        session.beginTransaction();
+        UUID codeTestedQuestionId = UUID.randomUUID();
+        UUID earningsQuestionId = UUID.randomUUID();
+        session.persist(new QuestionBuilder().id(codeTestedQuestionId)
+          .content("Is this code tested?")
+          .shouldBeAsked(true)
+          .build());
+        session.persist(new QuestionBuilder().id(earningsQuestionId)
+          .content("How much do you earn?")
+          .shouldBeAsked(false)
+          .build());
+        session.flush();
+
+        char codeTestedQuestionShouldBeAskedDbValue = session.createNativeQuery(format("SELECT shouldBeAsked FROM Question WHERE id='%s'", codeTestedQuestionId), Character.class)
+          .getSingleResult();
+        char earningsQuestionsShouldBeAskedDbValue = session.createNativeQuery(format("SELECT shouldBeAsked FROM Question WHERE id='%s'", earningsQuestionId), Character.class)
+          .getSingleResult();
+        session.close();
+
+        assertEquals('T', codeTestedQuestionShouldBeAskedDbValue);
+        assertEquals('F', earningsQuestionsShouldBeAskedDbValue);
+    }
+
+    @Test
+    void whenFieldAnnotatedWithNumericBooleanConverter_ThenConversionWorks() {
+        session.beginTransaction();
+        UUID earthFlatQuestionId = UUID.randomUUID();
+        UUID shouldLearnProgrammingQuestionId = UUID.randomUUID();
+        session.persist(new QuestionBuilder().id(earthFlatQuestionId)
+          .content("Is the Earth flat?")
+          .isEasy(true)
+          .build());
+        session.persist(new QuestionBuilder().id(shouldLearnProgrammingQuestionId)
+          .content("Should one learn programming")
+          .isEasy(false)
+          .build());
+        session.flush();
+
+        int earthFlatQuestionIsEasyDbValue = session.createNativeQuery(format("SELECT isEasy FROM Question WHERE id='%s'", earthFlatQuestionId), Integer.class)
+          .getSingleResult();
+        int shouldLearnProgrammingQuestionIsEasyDbValue = session.createNativeQuery(format("SELECT isEasy FROM Question WHERE id='%s'", shouldLearnProgrammingQuestionId), Integer.class)
+          .getSingleResult();
+        session.close();
+
+        assertEquals(1, earthFlatQuestionIsEasyDbValue);
+        assertEquals(0, shouldLearnProgrammingQuestionIsEasyDbValue);
+    }
+
+    @Test
+    void givenFieldAnnotatedWithYesNoConverter_WhenDbValueIsLowercase_ThenDomainModelValueNull() {
+        session.beginTransaction();
+        UUID mappedToNullQuestionId = UUID.randomUUID();
+        UUID behaviorIntuitiveQuestionId = UUID.randomUUID();
+        session.createNativeMutationQuery(format("INSERT INTO Question (id, content, correctAnswer) VALUES ('%s', 'Will correctAnswer be mapped to null?', 'y')", mappedToNullQuestionId))
+          .executeUpdate();
+        session.createNativeMutationQuery(format("INSERT INTO Question (id, content, correctAnswer) VALUES ('%s', 'Is this behavior intuitive?', 'n')", behaviorIntuitiveQuestionId))
+          .executeUpdate();
+
+        Question behaviorIntuitiveQuestion = session.get(Question.class, behaviorIntuitiveQuestionId);
+        Question mappedToNullQuestion = session.get(Question.class, mappedToNullQuestionId);
+        session.close();
+
+        assertNull(behaviorIntuitiveQuestion.getCorrectAnswer());
+        assertNull(mappedToNullQuestion.getCorrectAnswer());
+    }
+
+    @Test
+    void givenConverterRegisteredToAutoApply_whenFieldIsNotAnnotated_ThenConversionWorks() {
+        session.beginTransaction();
+        UUID likeJavaQuestionId = UUID.randomUUID();
+        UUID likeKotlinQuestionId = UUID.randomUUID();
+        session.persist(new QuestionBuilder().id(likeJavaQuestionId)
+          .content("Do you like Java?")
+          .wasAskedBefore(true)
+          .build());
+        session.persist(new QuestionBuilder().id(likeKotlinQuestionId)
+          .content("Do you like Kotlin?")
+          .wasAskedBefore(false)
+          .build());
+        session.flush();
+
+        char likeJavaQuestionWasAskedBeforeDbValue = session.createNativeQuery(format("SELECT wasAskedBefore FROM Question WHERE id='%s'", likeJavaQuestionId), Character.class)
+          .getSingleResult();
+        char likeKotlinQuestionWasAskedBeforeDbValue = session.createNativeQuery(format("SELECT wasAskedBefore FROM Question WHERE id='%s'", likeKotlinQuestionId), Character.class)
+          .getSingleResult();
+        session.close();
+
+        assertEquals('Y', likeJavaQuestionWasAskedBeforeDbValue);
+        assertEquals('N', likeKotlinQuestionWasAskedBeforeDbValue);
+    }
+}

persistence-modules/hibernate-mapping-2/src/test/java/com/baeldung/hibernate/booleanconverters/QuestionBuilder.java

@@ -0,0 +1,48 @@
+package com.baeldung.hibernate.booleanconverters;
+
+import java.util.UUID;
+
+import com.baeldung.hibernate.booleanconverters.model.Question;
+
+public class QuestionBuilder {
+    private UUID id;
+    private String content;
+    private Boolean correctAnswer;
+    private Boolean shouldBeAsked;
+    private Boolean isEasy;
+    private Boolean wasAskedBefore;
+
+    public QuestionBuilder id(UUID id) {
+        this.id = id;
+        return this;
+    }
+
+    public QuestionBuilder content(String content) {
+        this.content = content;
+        return this;
+    }
+
+    public QuestionBuilder correctAnswer(Boolean correctAnswer) {
+        this.correctAnswer = correctAnswer;
+        return this;
+    }
+
+    public QuestionBuilder shouldBeAsked(Boolean shouldBeAsked) {
+        this.shouldBeAsked = shouldBeAsked;
+        return this;
+    }
+
+    public QuestionBuilder isEasy(Boolean isEasy) {
+        this.isEasy = isEasy;
+        return this;
+    }
+
+    public QuestionBuilder wasAskedBefore(Boolean wasAskedBefore) {
+        this.wasAskedBefore = wasAskedBefore;
+        return this;
+    }
+
+    public Question build() {
+        return new Question(id, content, correctAnswer, shouldBeAsked, isEasy, wasAskedBefore);
+    }
+}

persistence-modules/hibernate-mapping-2/src/test/java/com/baeldung/hibernate/manytomany/HibernateManyToManyAnnotationJavaConfigMainIntegrationTest.java

@@ -13,9 +13,9 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 import org.springframework.test.context.support.AnnotationConfigContextLoader;
-import com.baeldung.manytomany.PersistenceConfig;
-import com.baeldung.manytomany.model.Employee;
-import com.baeldung.manytomany.model.Project;
+
+import com.baeldung.hibernate.manytomany.model.Employee;
+import com.baeldung.hibernate.manytomany.model.Project;
 
 @RunWith(SpringJUnit4ClassRunner.class)
 @ContextConfiguration(classes = { PersistenceConfig.class }, loader = AnnotationConfigContextLoader.class)

persistence-modules/hibernate-mapping-2/src/test/java/com/baeldung/hibernate/manytomany/HibernateManyToManyAnnotationMainIntegrationTest.java

@@ -15,9 +15,9 @@ import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
-import com.baeldung.manytomany.model.Employee;
-import com.baeldung.manytomany.model.Project;
-import com.baeldung.HibernateUtil;
+import com.baeldung.hibernate.manytomany.model.Employee;
+import com.baeldung.hibernate.manytomany.model.Project;
+import com.baeldung.hibernate.HibernateUtil;
 
 /**
  * Configured in: manytomany.cfg.xml

persistence-modules/hibernate-mapping-2/src/test/java/com/baeldung/hibernate/uuids/UUIDsHibernateGenerationIntegrationTest.java

@@ -1,18 +1,12 @@
 package com.baeldung.hibernate.uuids;
 
-import com.baeldung.HibernateUtil;
+import com.baeldung.hibernate.HibernateUtil;
 
-import com.baeldung.uuids.Reservation;
-import com.baeldung.uuids.Sale;
-import com.baeldung.uuids.WebSiteUser;
-import com.baeldung.uuids.Element;
 import org.assertj.core.api.Assertions;
 import java.io.IOException;
 
 import org.hibernate.SessionFactory;
 import org.hibernate.Session;
-import org.junit.After;
-import org.junit.AfterClass;
 import org.junit.Before;
 import org.junit.Test;
 import java.util.UUID;

persistence-modules/hibernate-mapping-2/src/test/resources/booleanconverters.cfg.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE hibernate-configuration PUBLIC
+        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
+        "http://hibernate.org/dtd/hibernate-configuration-3.0.dtd">
+<hibernate-configuration>
+    <session-factory>
+        <property name="hibernate.connection.driver_class">org.h2.Driver</property>
+        <property name="hibernate.connection.password"></property>
+        <property name="hibernate.connection.url">jdbc:h2:mem:booleanconvertersdb;DB_CLOSE_DELAY=-1;INIT=RUNSCRIPT FROM 'src/test/resources/booleanconverters/init_database.sql'</property>
+        <property name="hibernate.connection.username">sa</property>
+        <property name="hibernate.dialect">org.hibernate.dialect.H2Dialect</property>
+        <property name="hibernate.current_session_context_class">thread</property>
+        <property name="hibernate.show_sql">false</property>
+        <property name="hibernate.hbm2ddl.auto">none</property>
+    </session-factory>
+</hibernate-configuration>

persistence-modules/hibernate-mapping-2/src/test/resources/booleanconverters/init_database.sql

@@ -0,0 +1,9 @@
+CREATE TABLE Question (
+    id UUID,
+    content VARCHAR,
+    correctAnswer CHAR,
+    shouldBeAsked CHAR,
+    isEasy TINYINT,
+    wasAskedBefore CHAR,
+    PRIMARY KEY (id)
+)