BAEL-1280: Mapping Dynamic Values (@Formula, @Filter, @Any, @Where)

hibernate5/pom.xml

@@ -22,7 +22,7 @@
         <dependency>
             <groupId>org.hibernate</groupId>
             <artifactId>hibernate-core</artifactId>
-            <version>5.2.9.Final</version>
+            <version>5.2.12.Final</version>
         </dependency>
         <dependency>
             <groupId>junit</groupId>

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

@@ -68,7 +68,7 @@ public class HibernateMultiTenantUtil {
         Properties properties = new Properties();
         URL propertiesURL = Thread.currentThread()
             .getContextClassLoader()
-            .getResource("hibernate.properties");
+            .getResource("hibernate-multitenancy.properties");
         FileInputStream inputStream = new FileInputStream(propertiesURL.getFile());
         properties.load(inputStream);
         System.out.println("LOADED PROPERTIES FROM hibernate.properties");

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

@@ -1,24 +1,58 @@
 package com.baeldung.hibernate;
 
+import com.baeldung.hibernate.pojo.Employee;
+import com.baeldung.hibernate.pojo.EntityDescription;
+import com.baeldung.hibernate.pojo.Phone;
 import org.hibernate.SessionFactory;
-import org.hibernate.cfg.Configuration;
+import org.hibernate.boot.Metadata;
+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;
 
 public class HibernateUtil {
+    private static SessionFactory sessionFactory;
 
-    private static final SessionFactory sessionFactory;
-
-    static {
-        try {
-            Configuration configuration = new Configuration().configure();
-            sessionFactory = configuration.buildSessionFactory();
-
-        } catch (Throwable ex) {
-            System.err.println("Initial SessionFactory creation failed." + ex);
-            throw new ExceptionInInitializerError(ex);
+    public static SessionFactory getSessionFactory() throws IOException {
+        if (sessionFactory == null) {
+            ServiceRegistry serviceRegistry = configureServiceRegistry();
+            sessionFactory = makeSessionFactory(serviceRegistry);
         }
-    }
-
-    public static SessionFactory getSessionFactory() {
         return sessionFactory;
     }
+
+    private static SessionFactory makeSessionFactory(ServiceRegistry serviceRegistry) {
+        MetadataSources metadataSources = new MetadataSources(serviceRegistry);
+        metadataSources.addPackage("com.baeldung.hibernate.pojo");
+        metadataSources.addAnnotatedClass(Employee.class);
+        metadataSources.addAnnotatedClass(Phone.class);
+        metadataSources.addAnnotatedClass(EntityDescription.class);
+
+        Metadata metadata = metadataSources.buildMetadata();
+        return metadata.getSessionFactoryBuilder()
+                .build();
+
+    }
+
+    private static ServiceRegistry configureServiceRegistry() throws IOException {
+        Properties properties = getProperties();
+        return new StandardServiceRegistryBuilder().applySettings(properties)
+                .build();
+    }
+
+    private static Properties getProperties() throws IOException {
+        Properties properties = new Properties();
+        URL propertiesURL = Thread.currentThread()
+                .getContextClassLoader()
+                .getResource("hibernate.properties");
+        try (FileInputStream inputStream = new FileInputStream(propertiesURL.getFile())) {
+            properties.load(inputStream);
+        }
+        return properties;
+    }
+
 }

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

@@ -0,0 +1,87 @@
+package com.baeldung.hibernate.pojo;
+
+import org.hibernate.annotations.*;
+
+import javax.persistence.Entity;
+import javax.persistence.*;
+import java.io.Serializable;
+import java.util.HashSet;
+import java.util.Set;
+
+@Entity
+@Where(clause = "deleted = false")
+@FilterDef(name = "incomeLevelFilter", parameters = @ParamDef(name = "incomeLimit", type = "int"))
+@Filter(name = "incomeLevelFilter", condition = "grossIncome > :incomeLimit")
+public class Employee implements Serializable {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Integer id;
+
+    private long grossIncome;
+
+    private int taxInPercents;
+
+    private boolean deleted;
+
+    public long getTaxJavaWay() {
+        return grossIncome * taxInPercents / 100;
+    }
+
+    @Formula("grossIncome * taxInPercents / 100")
+    private long tax;
+
+    @OneToMany
+    @JoinColumn(name = "employee_id")
+    @Where(clause = "deleted = false")
+    private Set<Phone> phones = new HashSet<>(0);
+
+    public Employee() {
+    }
+
+    public Employee(long grossIncome, int taxInPercents) {
+        this.grossIncome = grossIncome;
+        this.taxInPercents = taxInPercents;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public long getGrossIncome() {
+        return grossIncome;
+    }
+
+    public int getTaxInPercents() {
+        return taxInPercents;
+    }
+
+    public long getTax() {
+        return tax;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public void setGrossIncome(long grossIncome) {
+        this.grossIncome = grossIncome;
+    }
+
+    public void setTaxInPercents(int taxInPercents) {
+        this.taxInPercents = taxInPercents;
+    }
+
+    public boolean getDeleted() {
+        return deleted;
+    }
+
+    public void setDeleted(boolean deleted) {
+        this.deleted = deleted;
+    }
+
+    public Set<Phone> getPhones() {
+        return phones;
+    }
+
+}

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

@@ -0,0 +1,55 @@
+package com.baeldung.hibernate.pojo;
+
+import org.hibernate.annotations.Any;
+
+import javax.persistence.*;
+import java.io.Serializable;
+
+@Entity
+public class EntityDescription implements Serializable {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Integer id;
+
+    private String description;
+
+    @Any(
+            metaDef = "EntityDescriptionMetaDef",
+            metaColumn = @Column(name = "entity_type")
+    )
+    @JoinColumn(name = "entity_id")
+    private Serializable entity;
+
+    public EntityDescription() {
+    }
+
+    public EntityDescription(String description, Serializable entity) {
+        this.description = description;
+        this.entity = entity;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public Serializable getEntity() {
+        return entity;
+    }
+
+    public void setEntity(Serializable entity) {
+        this.entity = entity;
+    }
+}

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

@@ -0,0 +1,50 @@
+package com.baeldung.hibernate.pojo;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import java.io.Serializable;
+
+@Entity
+public class Phone implements Serializable {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Integer id;
+
+    private boolean deleted;
+
+    private String number;
+
+    public Phone() {
+    }
+
+    public Phone(String number) {
+        this.number = number;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public boolean isDeleted() {
+        return deleted;
+    }
+
+    public void setDeleted(boolean deleted) {
+        this.deleted = deleted;
+    }
+
+    public String getNumber() {
+        return number;
+    }
+
+    public void setNumber(String number) {
+        this.number = number;
+    }
+}

hibernate5/src/main/java/com/baeldung/hibernate/pojo/package-info.java

@@ -0,0 +1,9 @@
+@AnyMetaDef(name = "EntityDescriptionMetaDef", metaType = "string", idType = "int",
+        metaValues = {
+                @MetaValue(value = "Employee", targetEntity = Employee.class),
+                @MetaValue(value = "Phone", targetEntity = Phone.class)
+        })
+package com.baeldung.hibernate.pojo;
+
+import org.hibernate.annotations.AnyMetaDef;
+import org.hibernate.annotations.MetaValue;

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

@@ -0,0 +1,164 @@
+package com.baeldung.hibernate;
+
+import com.baeldung.hibernate.pojo.Employee;
+import com.baeldung.hibernate.pojo.EntityDescription;
+import com.baeldung.hibernate.pojo.Phone;
+import org.hibernate.Session;
+import org.hibernate.Transaction;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.util.List;
+
+import static org.junit.Assert.*;
+
+public class DynamicMappingTest {
+
+    private Session session;
+
+    private Transaction transaction;
+
+    @Before
+    public void setUp() throws IOException {
+        session = HibernateUtil.getSessionFactory().openSession();
+        transaction = session.beginTransaction();
+
+        session.createNativeQuery("delete from phone").executeUpdate();
+        session.createNativeQuery("delete from employee").executeUpdate();
+
+        transaction.commit();
+        transaction = session.beginTransaction();
+    }
+
+    @After
+    public void tearDown() {
+        transaction.commit();
+        session.close();
+    }
+
+    @Test
+    public void givenEntity_whenFieldMappedWithFormula_thenFieldIsCalculated() {
+        Employee employee = new Employee(10_000L, 25);
+        assertEquals(2_500L, employee.getTaxJavaWay());
+
+        session.save(employee);
+        session.flush();
+        session.clear();
+
+        employee = session.get(Employee.class, employee.getId());
+        assertEquals(2_500L, employee.getTax());
+    }
+
+    @Test
+    public void givenEntityMappedWithWhere_whenDeletedIsTrue_thenEntityNotFetched() {
+        Employee employee = new Employee();
+
+        session.save(employee);
+        session.clear();
+
+        employee = session.find(Employee.class, employee.getId());
+        assertNotNull(employee);
+
+        employee.setDeleted(true);
+        session.flush();
+
+        employee = session.find(Employee.class, employee.getId());
+        assertNotNull(employee);
+
+        session.clear();
+
+        employee = session.find(Employee.class, employee.getId());
+        assertNull(employee);
+
+    }
+
+    @Test
+    public void givenCollectionMappedWithWhere_whenDeletedIsTrue_thenEntityNotFetched() {
+        Employee employee = new Employee();
+        Phone phone1 = new Phone("555-45-67");
+        Phone phone2 = new Phone("555-89-01");
+        employee.getPhones().add(phone1);
+        employee.getPhones().add(phone2);
+
+        session.save(phone1);
+        session.save(phone2);
+        session.save(employee);
+        session.flush();
+        session.clear();
+
+        employee = session.find(Employee.class, employee.getId());
+        assertEquals(employee.getPhones().size(), 2);
+
+        employee.getPhones().iterator().next().setDeleted(true);
+        session.flush();
+        session.clear();
+
+        employee = session.find(Employee.class, employee.getId());
+        assertEquals(employee.getPhones().size(), 1);
+
+        List<Phone> fullPhoneList = session.createQuery("from Phone").getResultList();
+        assertEquals(2, fullPhoneList.size());
+
+    }
+
+    @Test
+    public void givenFilterByIncome_whenIncomeLimitSet_thenFilterIsApplied() throws IOException {
+        session.save(new Employee(10_000, 25));
+        session.save(new Employee(12_000, 25));
+        session.save(new Employee(15_000, 25));
+
+        session.flush();
+        session.clear();
+
+        session.enableFilter("incomeLevelFilter")
+                .setParameter("incomeLimit", 11_000);
+
+        List<Employee> employees = session.createQuery("from Employee").getResultList();
+
+        assertEquals(2, employees.size());
+
+        Employee employee = session.get(Employee.class, 1);
+        assertEquals(10_000, employee.getGrossIncome());
+
+        session.close();
+
+        session = HibernateUtil.getSessionFactory().openSession();
+        transaction = session.beginTransaction();
+
+        employees = session.createQuery("from Employee").getResultList();
+
+        assertEquals(3, employees.size());
+
+    }
+
+    @Test
+    public void givenMappingWithAny_whenDescriptionAddedToEntity_thenDescriptionCanReferAnyEntity() {
+        Employee employee = new Employee();
+        Phone phone1 = new Phone("555-45-67");
+        Phone phone2 = new Phone("555-89-01");
+        employee.getPhones().add(phone1);
+        employee.getPhones().add(phone2);
+
+        EntityDescription employeeDescription = new EntityDescription("Send to conference next year", employee);
+        EntityDescription phone1Description = new EntityDescription("Home phone (do not call after 10PM)", phone1);
+        EntityDescription phone2Description = new EntityDescription("Work phone", phone1);
+
+        session.save(phone1);
+        session.save(phone2);
+        session.save(employee);
+        session.save(employeeDescription);
+        session.save(phone1Description);
+        session.save(phone2Description);
+        session.flush();
+        session.clear();
+
+        List<EntityDescription> descriptions = session.createQuery("from EntityDescription").getResultList();
+
+        assertTrue(Employee.class.isAssignableFrom(descriptions.get(0).getEntity().getClass()));
+        assertTrue(Phone.class.isAssignableFrom(descriptions.get(1).getEntity().getClass()));
+        assertTrue(Phone.class.isAssignableFrom(descriptions.get(2).getEntity().getClass()));
+    }
+
+}

hibernate5/src/test/resources/hibernate-multitenancy.properties

@@ -0,0 +1,9 @@
+hibernate.connection.driver_class=org.h2.Driver
+hibernate.connection.url=jdbc:h2:mem:mydb1;DB_CLOSE_DELAY=-1
+hibernate.connection.username=sa
+hibernate.connection.autocommit=true
+jdbc.password=
+
+hibernate.dialect=org.hibernate.dialect.H2Dialect
+hibernate.show_sql=true
+hibernate.multiTenancy=DATABASE

hibernate5/src/test/resources/hibernate.properties

@@ -6,4 +6,4 @@ jdbc.password=
 
 hibernate.dialect=org.hibernate.dialect.H2Dialect
 hibernate.show_sql=true
-hibernate.multiTenancy=DATABASE
+hibernate.hbm2ddl.auto=create-drop