Add Hibernate 7 batches 2-5: mapping styles, JPA annotations, natural IDs, @Immutable, stored procedures, in-memory test databases, JNDI mocking, proxies, associations, temporal mapping and named queries (Hibernate 7.4.5.Final + Spring Boot 4.1.1 + JDK 25)

src/main/java/com/ankurm/hibernatedemo/persistenceannotations/EnumeratedValueEntity.java

@@ -0,0 +1,61 @@
+package com.ankurm.hibernatedemo.persistenceannotations;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Enumerated;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.EnumeratedValue;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+
+/**
+ * {@code @EnumeratedValue} is NEW in Jakarta Persistence 3.2 (confirmed present via javap on
+ * jakarta.persistence-api 3.2.0 -- it does not exist in 3.1). It lets an enum control its own
+ * persisted representation (a custom code), instead of ORDINAL or STRING.
+ *
+ * <p>Docs: docs/05-jpa-persistence-annotations.md, Topic 2.
+ */
+@Entity
+public class EnumeratedValueEntity {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    // @EnumeratedValue's own field type (String) determines the persisted column type, but
+    // Hibernate still needs to be told this is a STRING-shaped enum, not the ORDINAL default --
+    // otherwise boot fails with "@EnumeratedValue for EnumType.ORDINAL must be placed on a
+    // field whose type is byte, short, or int".
+    @Enumerated(EnumType.STRING)
+    private Priority priority;
+
+    public EnumeratedValueEntity() {
+    }
+
+    public EnumeratedValueEntity(Priority priority) {
+        this.priority = priority;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public Priority getPriority() {
+        return priority;
+    }
+
+    /** Persisted representation is the "code" string, NOT the enum's ordinal or name(). */
+    public enum Priority {
+        LOW("L"), MEDIUM("M"), HIGH("H");
+
+        @EnumeratedValue
+        private final String code;
+
+        Priority(String code) {
+            this.code = code;
+        }
+
+        public String getCode() {
+            return code;
+        }
+    }
+}