HHH-16625 Introduce a compilation unit among tests to serve as reminder about Quarkus requirements

hibernate-core/src/test/java/org/hibernate/orm/test/quarkus/MetadataCopyingTest.java

@@ -0,0 +1,53 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later
+ * See the lgpl.txt file in the root directory or http://www.gnu.org/licenses/lgpl-2.1.html
+ */
+package org.hibernate.orm.test.quarkus;
+
+import org.hibernate.boot.internal.MetadataImpl;
+
+import org.junit.Test;
+
+/**
+ * Quarkus needs to be able to make a deep copy of MetadataImpl;
+ * for this to be possible, it needs to expose some of its state.
+ * Adding a test to help remembering about this requirement: we
+ * only need this to compile so that it serves as a reminder.
+ */
+public class MetadataCopyingTest {
+
+	public void copyIsPossible() {
+		MetadataImpl existingInstance = fetchSomehowOldCopy();
+		//Test that for each constructor parameter needed to create a new MetadataImpl,
+		//we can actually read the matching state from an existing MetadataImpl instance.
+		MetadataImpl newcopy = new MetadataImpl(
+				existingInstance.getUUID(),
+				existingInstance.getMetadataBuildingOptions(),
+				existingInstance.getEntityBindingMap(),
+				existingInstance.getComposites(),
+				existingInstance.getGenericComponentsMap(),
+				existingInstance.getMappedSuperclassMap(),
+				existingInstance.getCollectionBindingMap(),
+				existingInstance.getTypeDefinitionMap(),
+				existingInstance.getFilterDefinitions(),
+				existingInstance.getFetchProfileMap(),
+				existingInstance.getImports(),
+				existingInstance.getIdGeneratorDefinitionMap(),
+				existingInstance.getNamedQueryMap(),
+				existingInstance.getNamedNativeQueryMap(),
+				existingInstance.getNamedProcedureCallMap(),
+				existingInstance.getSqlResultSetMappingMap(),
+				existingInstance.getNamedEntityGraphs(),
+				existingInstance.getSqlFunctionMap(),
+				existingInstance.getDatabase(),
+				existingInstance.getBootstrapContext()
+		);
+	}
+
+	private MetadataImpl fetchSomehowOldCopy() {
+		return null;
+	}
+
+}

hibernate-core/src/test/java/org/hibernate/orm/test/quarkus/package-info.java

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+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later
+ * See the lgpl.txt file in the root directory or http://www.gnu.org/licenses/lgpl-2.1.html
+ */
+package org.hibernate.orm.test.quarkus;
+
+/**
+ * Contains hints and reminders useful to smoother compatibility with Quarkus.
+ * These are intentionally not full integration tests to avoid high coupling
+ * and circularity of builds, but meant as simple reminders during maintenance
+ * of Hibernate ORM.
+ * It's acceptable to occasionally change these, but please ensure there's
+ * a plan for progress that works for both projects.
+ */