Optimize Hibernate native footprint by making ByteBuddy unreachable

As a workaround before a proper solution the Spring team is trying to
find with the Hibernate team in a future version of Hibernate, this
commit introduces 2 GraalVM substitutions that should allow to remove
ByteBuddy reachability with Hibernate 6.3.

Closes gh-29549

Author: sdeleuze

spring-orm/src/main/java/org/springframework/orm/jpa/vendor/Target_BytecodeProvider.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2002-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.orm.jpa.vendor;
+
+import java.util.Map;
+
+import com.oracle.svm.core.annotate.Substitute;
+import com.oracle.svm.core.annotate.TargetClass;
+import org.hibernate.bytecode.spi.ReflectionOptimizer;
+import org.hibernate.property.access.spi.PropertyAccess;
+
+/**
+ * Hibernate 6.3+ substitution designed to leniently return {@code null}, as authorized by the API, to avoid throwing an
+ * {@code HibernateException}.
+ * TODO Ask Hibernate team to fix this as it looks like a bug
+ *
+ * @author Sebastien Deleuze
+ * @since 6.1
+ */
+@TargetClass(className = "org.hibernate.bytecode.internal.none.BytecodeProviderImpl")
+final class Target_BytecodeProvider {
+
+	@Substitute
+	public ReflectionOptimizer getReflectionOptimizer(Class<?> clazz, Map<String, PropertyAccess> propertyAccessMap) {
+		return null;
+	}
+}

spring-orm/src/main/java/org/springframework/orm/jpa/vendor/Target_BytecodeProviderInitiator.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2002-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.orm.jpa.vendor;
+
+import com.oracle.svm.core.annotate.Alias;
+import com.oracle.svm.core.annotate.RecomputeFieldValue;
+import com.oracle.svm.core.annotate.Substitute;
+import com.oracle.svm.core.annotate.TargetClass;
+import org.hibernate.bytecode.spi.BytecodeProvider;
+
+import static com.oracle.svm.core.annotate.RecomputeFieldValue.Kind;
+
+/**
+ * Hibernate substitution designed to prevent ByteBuddy reachability on native, and to enforce the
+ * usage of {@code org.hibernate.bytecode.internal.none.BytecodeProviderImpl} with Hibernate 6.3+.
+ * TODO Collaborate with Hibernate team on a substitution-less alternative that does not require a custom list of StandardServiceInitiator
+ *
+ * @author Sebastien Deleuze
+ * @since 6.1
+ */
+@TargetClass(className = "org.hibernate.bytecode.internal.BytecodeProviderInitiator")
+final class Target_BytecodeProviderInitiator {
+
+	@Alias
+	public static String BYTECODE_PROVIDER_NAME_NONE;
+
+	@Alias
+	@RecomputeFieldValue(kind = Kind.FromAlias)
+	public static String BYTECODE_PROVIDER_NAME_DEFAULT = BYTECODE_PROVIDER_NAME_NONE;
+
+	@Substitute
+	public static BytecodeProvider buildBytecodeProvider(String providerName) {
+		return new org.hibernate.bytecode.internal.none.BytecodeProviderImpl();
+	}
+}

src/checkstyle/checkstyle-suppressions.xml

@@ -84,6 +84,7 @@
 
 	<!-- spring-orm -->
 	<suppress files="jpa[\\/]vendor[\\/]Database" checks="JavadocVariable|JavadocStyle"/>
+	<suppress files="Target_BytecodeProviderInitiator" checks="HideUtilityClassConstructorCheck"/>
 
 	<!-- spring-tx -->
 	<suppress files="TransactionSystemException" checks="MutableException"/>