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/mappingstyle/OrmXmlOnlyEntity.java

@@ -0,0 +1,38 @@
+package com.ankurm.hibernatedemo.mappingstyle;
+
+/**
+ * Deliberately carries NO JPA/Hibernate annotations at all -- not even {@code @Entity}.
+ * Its only mapping is {@code orm-xml-only-mapping.xml}, registered via
+ * {@code spring.jpa.mapping-resources}. If a query against {@code xml_only_widgets} succeeds,
+ * orm.xml alone is enough to make this a managed entity.
+ *
+ * <p>Docs: docs/04-annotations-vs-xml.md, Topic 1.
+ */
+public class OrmXmlOnlyEntity {
+
+    private Long id;
+    private String label;
+
+    public OrmXmlOnlyEntity() {
+    }
+
+    public OrmXmlOnlyEntity(String label) {
+        this.label = label;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getLabel() {
+        return label;
+    }
+
+    public void setLabel(String label) {
+        this.label = label;
+    }
+}