Add Hibernate 7 batches 2-6, batch 7, and batch 8: mapping styles, JPA annotations, natural IDs, @Immutable, stored procedures, in-memory test databases, JNDI mocking, proxies, associations, temporal mapping, named queries, HQL, Criteria API, EntityManager bootstrapping, Ehcache 3 L2 cache configuration, HikariCP connection pooling, Hibernate Validator CDI integration, aggregate functions, sorting, pagination, interceptors, and Hibernate Search 8 (Hibernate 7.4.5.Final + Spring Boot 4.1.1 + JDK 25)

src/main/java/com/ankurm/hibernatedemo/immutable/RateWithAuditTrail.java

@@ -0,0 +1,51 @@
+package com.ankurm.hibernatedemo.immutable;
+
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.OneToMany;
+import java.util.ArrayList;
+import java.util.List;
+import org.hibernate.annotations.Immutable;
+
+/**
+ * A MUTABLE parent entity (no {@code @Immutable} on the class) whose collection is marked
+ * {@code @Immutable}. This isolates the collection-level annotation's own behaviour, per the
+ * article's "Advanced Usage: Immutable Collections" section, from the entity-level one.
+ */
+@Entity
+public class RateWithAuditTrail {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "rate_audit_seq")
+    private Long id;
+
+    private String pair;
+
+    @Immutable
+    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
+    private List<AuditTrail> auditTrails = new ArrayList<>();
+
+    protected RateWithAuditTrail() {
+        // JPA
+    }
+
+    public RateWithAuditTrail(String pair) {
+        this.pair = pair;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getPair() {
+        return pair;
+    }
+
+    public List<AuditTrail> getAuditTrails() {
+        return auditTrails;
+    }
+}