When you initialize a map that is annotated with @ElementCollection and @LazyCollection(LazyCollectionOption.EXTRA) any changes to the embeddables are not written to the database.
Reproducer:
{code:java}package org.hibernate.bugs;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
/**
* This template demonstrates how to develop a test case for Hibernate ORM, using the Java
* Persistence API.
*/
public class JPAUnitTestCase {
private EntityManagerFactory entityManagerFactory;
@Before
public void init() {
entityManagerFactory = Persistence.createEntityManagerFactory("templatePU");
}
@After
public void destroy() {
entityManagerFactory.close();
}
@Test
public void hhh123Test() throws Exception {
// Given:
EntityManager entityManager = entityManagerFactory.createEntityManager();
entityManager.getTransaction().begin();
String primaryKey = "chewing gum";
Product product1 = new Product(primaryKey);
product1.setPrice("France", 100);
entityManager.persist(product1);
entityManager.getTransaction().commit();
// When:
entityManager.clear();
entityManager.getTransaction().begin();
Product product2 = entityManager.find(Product.class, primaryKey);
product2.setPrice("France", 999);
entityManager.getTransaction().commit();
// Then:
entityManager.getTransaction().begin();
Product product3 = entityManager.find(Product.class, primaryKey);
long actual = product3.getPrice("France");
entityManager.getTransaction().commit();
entityManager.close();
Assert.assertEquals(999L, actual);
entityManager.close();
}
}{code}
{noformat}package org.hibernate.bugs;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import javax.persistence.ElementCollection;
import javax.persistence.Entity;
import javax.persistence.Id;
import org.hibernate.annotations.LazyCollection;
import org.hibernate.annotations.LazyCollectionOption;
@Entity
public class Product {
@Id
private String name;
@ElementCollection
@LazyCollection(LazyCollectionOption.EXTRA)
private Map<String, Price> prices = new HashMap<>();
Product() {}
public Product(String name) {
this.name = name;
}
public void setPrice(String country, long cents) {
Price price = prices.computeIfAbsent(country, it -> new Price());
price.setCents(cents);
}
public Long getPrice(String country) {
return Optional.ofNullable(prices.get(country)).map(it -> it.getCents()).orElse(null);
}
@Override
public int hashCode() {
return Objects.hash(name, prices);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
Product other = (Product) obj;
return Objects.equals(name, other.name) && Objects.equals(prices, other.prices);
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("Product [name=");
builder.append(name);
builder.append(", prices=");
builder.append(prices);
builder.append("]");
return builder.toString();
}
}{noformat}
{noformat}package org.hibernate.bugs;
import java.util.Objects;
import javax.persistence.Column;
import javax.persistence.Embeddable;
@Embeddable
public class Price {
@Column
private long cents;
Price() {}
public Price(long cents) {
this.cents = cents;
}
public long getCents() {
return cents;
}
public void setCents(long cents) {
this.cents = cents;
}
@Override
public int hashCode() {
return Objects.hash(cents);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
Price other = (Price) obj;
return cents == other.cents;
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("Price [cents=");
builder.append(cents);
builder.append("]");
return builder.toString();
}
}{noformat} |
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