Merge pull request #5195 from priyeshmashelkar/master

BAEL-2096 Added classes for article

hibernate5/src/main/java/com/baeldung/hibernate/HibernateUtil.java

@@ -1,5 +1,11 @@
 package com.baeldung.hibernate;
 
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.net.URL;
+import java.util.Properties;
+
+import com.baeldung.hibernate.entities.DeptEmployee;
 import com.baeldung.hibernate.optimisticlocking.OptimisticLockingCourse;
 import com.baeldung.hibernate.optimisticlocking.OptimisticLockingStudent;
 import com.baeldung.hibernate.pessimisticlocking.Individual;
@@ -16,10 +22,30 @@ import org.hibernate.boot.MetadataSources;
 import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
 import org.hibernate.service.ServiceRegistry;
 
-import java.io.FileInputStream;
-import java.io.IOException;
-import java.net.URL;
-import java.util.Properties;
+import com.baeldung.hibernate.pojo.Course;
+import com.baeldung.hibernate.pojo.Employee;
+import com.baeldung.hibernate.pojo.EntityDescription;
+import com.baeldung.hibernate.pojo.OrderEntry;
+import com.baeldung.hibernate.pojo.OrderEntryIdClass;
+import com.baeldung.hibernate.pojo.OrderEntryPK;
+import com.baeldung.hibernate.pojo.Person;
+import com.baeldung.hibernate.pojo.Phone;
+import com.baeldung.hibernate.pojo.PointEntity;
+import com.baeldung.hibernate.pojo.PolygonEntity;
+import com.baeldung.hibernate.pojo.Product;
+import com.baeldung.hibernate.pojo.Student;
+import com.baeldung.hibernate.pojo.TemporalValues;
+import com.baeldung.hibernate.pojo.User;
+import com.baeldung.hibernate.pojo.UserProfile;
+import com.baeldung.hibernate.pojo.inheritance.Animal;
+import com.baeldung.hibernate.pojo.inheritance.Bag;
+import com.baeldung.hibernate.pojo.inheritance.Book;
+import com.baeldung.hibernate.pojo.inheritance.Car;
+import com.baeldung.hibernate.pojo.inheritance.MyEmployee;
+import com.baeldung.hibernate.pojo.inheritance.MyProduct;
+import com.baeldung.hibernate.pojo.inheritance.Pen;
+import com.baeldung.hibernate.pojo.inheritance.Pet;
+import com.baeldung.hibernate.pojo.inheritance.Vehicle;
 
 public class HibernateUtil {
     private static SessionFactory sessionFactory;
@@ -72,6 +98,8 @@ public class HibernateUtil {
         metadataSources.addAnnotatedClass(PessimisticLockingCourse.class);
         metadataSources.addAnnotatedClass(com.baeldung.hibernate.pessimisticlocking.Customer.class);
         metadataSources.addAnnotatedClass(com.baeldung.hibernate.pessimisticlocking.Address.class);
+        metadataSources.addAnnotatedClass(DeptEmployee.class);
+        metadataSources.addAnnotatedClass(com.baeldung.hibernate.entities.Department.class);
         metadataSources.addAnnotatedClass(OptimisticLockingCourse.class);
         metadataSources.addAnnotatedClass(OptimisticLockingStudent.class);
 

hibernate5/src/main/java/com/baeldung/hibernate/entities/Department.java

@@ -0,0 +1,45 @@
+package com.baeldung.hibernate.entities;
+
+import java.util.List;
+
+import javax.persistence.*;
+
+@Entity
+public class Department {
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE)
+    private long id;
+
+    private String name;
+
+    @OneToMany(mappedBy="department")
+    private List<DeptEmployee> employees;
+
+    public Department(String name) {
+        this.name = name;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public List<DeptEmployee> getEmployees() {
+        return employees;
+    }
+
+    public void setEmployees(List<DeptEmployee> employees) {
+        this.employees = employees;
+    }
+}

hibernate5/src/main/java/com/baeldung/hibernate/entities/DeptEmployee.java

@@ -0,0 +1,65 @@
+package com.baeldung.hibernate.entities;
+
+import javax.persistence.*;
+
+@Entity
+public class DeptEmployee {
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE)
+    private long id;
+
+    private String employeeNumber;
+
+    private String designation;
+
+    private String name;
+
+    @ManyToOne
+    private Department department;
+    
+    public DeptEmployee(String name, String employeeNumber, Department department) {
+        this.name = name;
+        this.employeeNumber = employeeNumber;
+        this.department = department;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getEmployeeNumber() {
+        return employeeNumber;
+    }
+
+    public void setEmployeeNumber(String employeeNumber) {
+        this.employeeNumber = employeeNumber;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Department getDepartment() {
+        return department;
+    }
+
+    public void setDepartment(Department department) {
+        this.department = department;
+    }
+
+    public String getDesignation() {
+        return designation;
+    }
+
+    public void setDesignation(String designation) {
+        this.designation = designation;
+    }
+}

hibernate5/src/main/java/com/baeldung/hibernate/pojo/Result.java

@@ -0,0 +1,31 @@
+package com.baeldung.hibernate.pojo;
+
+public class Result {
+    private String employeeName;
+
+    private String departmentName;
+    
+    public Result(String employeeName, String departmentName) {
+        this.employeeName = employeeName;
+        this.departmentName = departmentName;
+    }
+
+    public Result() {
+    }
+
+    public String getEmployeeName() {
+        return employeeName;
+    }
+
+    public void setEmployeeName(String employeeName) {
+        this.employeeName = employeeName;
+    }
+
+    public String getDepartmentName() {
+        return departmentName;
+    }
+
+    public void setDepartmentName(String departmentName) {
+        this.departmentName = departmentName;
+    }
+}

hibernate5/src/test/java/com/baeldung/hibernate/CustomClassIntegrationTest.java

@@ -0,0 +1,77 @@
+package com.baeldung.hibernate;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.io.IOException;
+import java.util.List;
+
+import com.baeldung.hibernate.entities.DeptEmployee;
+import org.hibernate.Session;
+import org.hibernate.Transaction;
+import org.hibernate.query.Query;
+import org.hibernate.transform.Transformers;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import com.baeldung.hibernate.entities.Department;
+import com.baeldung.hibernate.pojo.Result;
+
+public class CustomClassIntegrationTest {
+
+    private Session session;
+
+    private Transaction transaction;
+
+    @BeforeEach
+    public void setUp() throws IOException {
+        session = HibernateUtil.getSessionFactory().openSession();
+        transaction = session.beginTransaction();
+        session.createNativeQuery("delete from manager").executeUpdate();
+        session.createNativeQuery("delete from department").executeUpdate();
+        Department department = new Department("Sales");
+        DeptEmployee employee = new DeptEmployee("John Smith", "001", department);
+        session.persist(department);
+        session.persist(employee);
+        transaction.commit();
+        transaction = session.beginTransaction();
+    }
+    
+    @Test
+    public void whenAllManagersAreSelected_ThenObjectGraphIsReturned() {
+        Query<DeptEmployee> query = session.createQuery("from com.baeldung.hibernate.entities.DeptEmployee");
+        List<DeptEmployee> deptEmployees = query.list();
+        DeptEmployee deptEmployee = deptEmployees.get(0);
+        assertEquals("John Smith", deptEmployee.getName());
+        assertEquals("Sales", deptEmployee.getDepartment().getName());
+    }
+    
+    @Test
+    public void whenIndividualPropertiesAreSelected_ThenObjectArrayIsReturned() {
+        Query query = session.createQuery("select m.name, m.department.name from com.baeldung.hibernate.entities.DeptEmployee m");
+        List managers = query.list();
+        Object[] manager = (Object[]) managers.get(0);
+        assertEquals("John Smith", manager[0]);
+        assertEquals("Sales", manager[1]);
+    }
+    
+    @Test
+    public void whenResultConstructorInSelect_ThenListOfResultIsReturned() {
+        Query<Result> query = session.createQuery("select new com.baeldung.hibernate.pojo.Result(m.name, m.department.name) "
+                + "from DeptEmployee m");
+        List<Result> results = query.list();
+        Result result = results.get(0);
+        assertEquals("John Smith", result.getEmployeeName());
+        assertEquals("Sales", result.getDepartmentName());
+    }
+    
+    @Test
+    public void whenResultTransformerOnQuery_ThenListOfResultIsReturned() {
+        Query query = session.createQuery("select m.name as employeeName, m.department.name as departmentName "
+                + "from com.baeldung.hibernate.entities.DeptEmployee m");
+        query.setResultTransformer(Transformers.aliasToBean(Result.class));
+        List<Result> results = query.list();
+        Result result = results.get(0);
+        assertEquals("John Smith", result.getEmployeeName());
+        assertEquals("Sales", result.getDepartmentName());   
+    }
+}