Add Hibernate 7 batches 2-6 and batch 7: 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, and Hibernate Validator CDI integration (Hibernate 7.4.5.Final + Spring Boot 4.1.1 + JDK 25)

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01EQNA6DJ9VgCtW6zhCE8Xud

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);
+    }
+}

src/main/java/com/ankurm/hibernatedemo/query/Employee.java

@@ -0,0 +1,97 @@
+package com.ankurm.hibernatedemo.query;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import java.time.LocalDate;
+
+/**
+ * Shared by the HQL chapter (15) and the Criteria API chapter (16).
+ *
+ * <p>Docs: docs/15-hql-queries.md, docs/16-criteria-queries.md.
+ *
+ * <p>{@code status} and {@code hireDate} exist specifically for the bulk-update/bulk-delete
+ * scenarios both chapters cover ({@code UPDATE ... WHERE lastLogin/hireDate < :cutoff}-shaped
+ * queries), and {@code department} is LAZY so the fetch-join chapter has a real N+1 to avoid
+ * rather than an asserted one.
+ */
+@Entity
+public class Employee {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    private String firstName;
+
+    private String lastName;
+
+    private Double salary;
+
+    private String status;
+
+    private LocalDate hireDate;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "department_id")
+    private Department department;
+
+    protected Employee() {
+        // JPA
+    }
+
+    public Employee(String firstName, String lastName, Double salary, String status, LocalDate hireDate, Department department) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+        this.salary = salary;
+        this.status = status;
+        this.hireDate = hireDate;
+        this.department = department;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public Double getSalary() {
+        return salary;
+    }
+
+    public void setSalary(Double salary) {
+        this.salary = salary;
+    }
+
+    public String getStatus() {
+        return status;
+    }
+
+    public void setStatus(String status) {
+        this.status = status;
+    }
+
+    public LocalDate getHireDate() {
+        return hireDate;
+    }
+
+    public Department getDepartment() {
+        return department;
+    }
+
+    @Override
+    public String toString() {
+        return "Employee{id=%s, firstName=%s, lastName=%s, salary=%s, status=%s}"
+                .formatted(id, firstName, lastName, salary, status);
+    }
+}