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Many To One BAEL-2329 (#5878) 

* Many To One BAEL-2329

* xml config
This commit is contained in:
myluckagain 2018-12-24 03:30:03 +05:00 committed by Diego Moreira
parent fda7ff2690
commit a444d51ae1
5 changed files with 230 additions and 1 deletions
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71
persistence-modules/spring-hibernate4/src/main/java/com/baeldung/hibernate/oneToMany/main/HibernateManyisOwningSide.java Normal file
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package com.baeldung.hibernate.oneToMany.main;
import java.util.HashSet;
import java.util.Set;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import com.baeldung.hibernate.oneToMany.config.HibernateAnnotationUtil;
import com.baeldung.hibernate.oneToMany.model.Cart;
import com.baeldung.hibernate.oneToMany.model.Items;
import com.baeldung.hibernate.oneToMany.model.ItemsOIO;
public class HibernateManyisOwningSide {
public static void main(String[] args) {
Cart cart = new Cart();
Cart cart2 = new Cart();
Items item1 = new Items(cart);
Items item2 = new Items(cart2);
Set<Items> itemsSet = new HashSet<Items>();
itemsSet.add(item1);
itemsSet.add(item2);
cart.setItems(itemsSet);
SessionFactory sessionFactory = null;
Session session = null;
Transaction tx = null;
try {
// Get Session
sessionFactory = HibernateAnnotationUtil.getSessionFactory();
session = sessionFactory.getCurrentSession();
System.out.println("Session created");
// start transaction
tx = session.beginTransaction();
// Save the Model object
session.save(cart);
session.save(cart2);
session.save(item1);
session.save(item2);
// Commit transaction
tx.commit();
session = sessionFactory.getCurrentSession();
tx = session.beginTransaction();
item1 = (Items) session.get(Items.class, new Long(1));
item2 = (Items) session.get(Items.class, new Long(2));
tx.commit();
System.out.println("item1 ID=" + item1.getId() + ", Foreign Key CartOIO ID=" + item1.getCart()
.getId());
System.out.println("item2 ID=" + item2.getId() + ", Foreign Key CartOIO ID=" + item2.getCart()
.getId());
} catch (Exception e) {
System.out.println("Exception occured. " + e.getMessage());
e.printStackTrace();
} finally {
if (!sessionFactory.isClosed()) {
System.out.println("Closing SessionFactory");
sessionFactory.close();
}
}
}
}

67
persistence-modules/spring-hibernate4/src/main/java/com/baeldung/hibernate/oneToMany/main/HibernateOneisOwningSide.java Normal file
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package com.baeldung.hibernate.oneToMany.main;
import java.util.HashSet;
import java.util.Set;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import com.baeldung.hibernate.oneToMany.config.HibernateAnnotationUtil;
import com.baeldung.hibernate.oneToMany.model.CartOIO;
import com.baeldung.hibernate.oneToMany.model.ItemsOIO;
public class HibernateOneisOwningSide {
public static void main(String[] args) {
CartOIO cart = new CartOIO();
CartOIO cart2 = new CartOIO();
ItemsOIO item1 = new ItemsOIO(cart);
ItemsOIO item2 = new ItemsOIO(cart2);
Set<ItemsOIO> itemsSet = new HashSet<ItemsOIO>();
itemsSet.add(item1);
itemsSet.add(item2);
cart.setItems(itemsSet);
SessionFactory sessionFactory = null;
Session session = null;
Transaction tx = null;
try {
// Get Session
sessionFactory = HibernateAnnotationUtil.getSessionFactory();
session = sessionFactory.getCurrentSession();
System.out.println("Session created");
// start transaction
tx = session.beginTransaction();
// Save the Model object
session.save(cart);
session.save(cart2);
session.save(item1);
session.save(item2);
// Commit transaction
tx.commit();
session = sessionFactory.getCurrentSession();
tx = session.beginTransaction();
item1 = (ItemsOIO) session.get(ItemsOIO.class, new Long(1));
item2 = (ItemsOIO) session.get(ItemsOIO.class, new Long(2));
tx.commit();
System.out.println("item1 ID=" + item1.getId() + ", Foreign Key CartOIO ID=" + item1.getCartOIO()
.getId());
System.out.println("item2 ID=" + item2.getId() + ", Foreign Key CartOIO ID=" + item2.getCartOIO()
.getId());
} catch (Exception e) {
System.out.println("Exception occured. " + e.getMessage());
e.printStackTrace();
} finally {
if (!sessionFactory.isClosed()) {
System.out.println("Closing SessionFactory");
sessionFactory.close();
}
}
}
}

42
persistence-modules/spring-hibernate4/src/main/java/com/baeldung/hibernate/oneToMany/model/CartOIO.java Normal file
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package com.baeldung.hibernate.oneToMany.model;
import java.util.Set;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToMany;
import javax.persistence.Table;
@Entity
@Table(name = "CARTOIO")
public class CartOIO {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
@OneToMany
@JoinColumn(name = "cart_id") // we need to duplicate the physical information
private Set<ItemsOIO> items;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public Set<ItemsOIO> getItems() {
return items;
}
public void setItems(Set<ItemsOIO> items) {
this.items = items;
}
}

47
persistence-modules/spring-hibernate4/src/main/java/com/baeldung/hibernate/oneToMany/model/ItemsOIO.java Normal file
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package com.baeldung.hibernate.oneToMany.model;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
@Entity
@Table(name = "ITEMSOIO")
public class ItemsOIO {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
@ManyToOne
@JoinColumn(name = "cart_id", insertable = false, updatable = false)
private CartOIO cart;
// Hibernate requires no-args constructor
public ItemsOIO() {
}
public ItemsOIO(CartOIO c) {
this.cart = c;
}
public CartOIO getCartOIO() {
return cart;
}
public void setCartOIO(CartOIO cart) {
this.cart = cart;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
}

4
persistence-modules/spring-hibernate4/src/main/resources/hibernate-annotation.cfg.xml
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@ -9,11 +9,13 @@
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/spring_hibernate_one_to_many?createDatabaseIfNotExist=true</property>
<property name="hibernate.connection.username">myuser</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hbm2ddl.auto">create</property>
<property name="hibernate.current_session_context_class">thread</property>
<property name="hibernate.show_sql">true</property>
<mapping class="com.baeldung.hibernate.oneToMany.model.Cart"/>
<mapping class="com.baeldung.hibernate.oneToMany.model.Items"/>
<mapping class="com.baeldung.hibernate.oneToMany.model.CartOIO"/>
<mapping class="com.baeldung.hibernate.oneToMany.model.ItemsOIO"/>
</session-factory>
</hibernate-configuration>