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

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;