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/query/Department.java

@@ -0,0 +1,49 @@
+package com.ankurm.hibernatedemo.query;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+
+/**
+ * Shared by the HQL chapter (15) and the Criteria API chapter (16) — both posts use the
+ * same Employee/Department pair in their examples, so one real mapping backs both rather than
+ * two near-duplicates.
+ *
+ * <p>Named {@code QueryDept} (entity name, via {@code @Entity(name = ...)}), not {@code
+ * Department}, because chapter 06's {@code naturalid.Department} already claims that entity
+ * name in this same persistence unit -- Hibernate requires distinct entity names project-wide,
+ * not just distinct class names.
+ *
+ * <p>Docs: docs/15-hql-queries.md, docs/16-criteria-queries.md.
+ */
+@Entity(name = "QueryDept")
+public class Department {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    private String name;
+
+    protected Department() {
+        // JPA
+    }
+
+    public Department(String name) {
+        this.name = name;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    @Override
+    public String toString() {
+        return "Department{id=%s, name=%s}".formatted(id, name);
+    }
+}