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/mappingstyle/MappingXmlNaturalIdEntity.java

@@ -0,0 +1,39 @@
+package com.ankurm.hibernatedemo.mappingstyle;
+
+/**
+ * Zero annotations. Mapped entirely by {@code mapping-xml-natural-id.xml}, using Hibernate's
+ * native "mapping.xml" XML dialect (namespace {@code http://www.hibernate.org/xsd/orm/mapping},
+ * schema {@code mapping-7.0.xsd}) -- NOT the JPA-standard orm.xml dialect, which has no
+ * <natural-id> element at all. Proves a Hibernate-only concept (@NaturalId) can be expressed
+ * in XML, just not in the portable JPA orm.xml XSD.
+ *
+ * <p>Docs: docs/04-annotations-vs-xml.md, Topic 1 ("what XML can do that annotations cannot" --
+ * inverted: what one XML dialect can do that the other XML dialect and annotations both cannot
+ * express the same way).
+ */
+public class MappingXmlNaturalIdEntity {
+
+    private Long id;
+    private String sku;
+    private String name;
+
+    public MappingXmlNaturalIdEntity() {
+    }
+
+    public MappingXmlNaturalIdEntity(String sku, String name) {
+        this.sku = sku;
+        this.name = name;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getSku() {
+        return sku;
+    }
+
+    public String getName() {
+        return name;
+    }
+}