Make methods of reachable hibernate services reflectively queryable

Relates to quarkusio#41995
Closes quarkusio#45525

Author: zakkak

extensions/hibernate-orm/deployment/src/main/java/io/quarkus/hibernate/orm/deployment/HibernateOrmProcessor.java

@@ -97,6 +97,7 @@
 import io.quarkus.deployment.builditem.LaunchModeBuildItem;
 import io.quarkus.deployment.builditem.LiveReloadBuildItem;
 import io.quarkus.deployment.builditem.LogCategoryBuildItem;
+import io.quarkus.deployment.builditem.NativeImageFeatureBuildItem;
 import io.quarkus.deployment.builditem.ServiceStartBuildItem;
 import io.quarkus.deployment.builditem.SystemPropertyBuildItem;
 import io.quarkus.deployment.builditem.TransformedClassesBuildItem;
@@ -125,6 +126,7 @@
 import io.quarkus.hibernate.orm.runtime.boot.xml.RecordableXmlMapping;
 import io.quarkus.hibernate.orm.runtime.config.DialectVersions;
 import io.quarkus.hibernate.orm.runtime.dev.HibernateOrmDevIntegrator;
+import io.quarkus.hibernate.orm.runtime.graal.RegisterServicesForReflectionFeature;
 import io.quarkus.hibernate.orm.runtime.integration.HibernateOrmIntegrationStaticDescriptor;
 import io.quarkus.hibernate.orm.runtime.migration.MultiTenancyStrategy;
 import io.quarkus.hibernate.orm.runtime.proxies.PreGeneratedProxies;
@@ -160,6 +162,11 @@ public final class HibernateOrmProcessor {
 
     private static final String INTEGRATOR_SERVICE_FILE = "META-INF/services/org.hibernate.integrator.spi.Integrator";
 
+    @BuildStep
+    NativeImageFeatureBuildItem registerServicesForReflection() {
+        return new NativeImageFeatureBuildItem(RegisterServicesForReflectionFeature.class);
+    }
+
     @BuildStep
     void registerHibernateOrmMetadataForCoreDialects(
             BuildProducer<DatabaseKindDialectBuildItem> producer) {

extensions/hibernate-orm/runtime/src/main/java/io/quarkus/hibernate/orm/runtime/graal/RegisterServicesForReflectionFeature.java

@@ -0,0 +1,35 @@
+package io.quarkus.hibernate.orm.runtime.graal;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import org.graalvm.nativeimage.hosted.Feature;
+import org.graalvm.nativeimage.hosted.RuntimeReflection;
+
+/**
+ * Makes methods of reachable hibernate services accessible through {@link Class#getMethods()}.
+ *
+ * See <a href="https://github.com/quarkusio/quarkus/issues/45525">Github issue #45525</a>.
+ */
+public class RegisterServicesForReflectionFeature implements Feature {
+
+    @Override
+    public String getDescription() {
+        return "Makes methods of reachable hibernate services accessible through getMethods()`";
+    }
+
+    // The {@code duringAnalysis} method is invoked multiple times and increases the set of reachable types, thus we
+    // need to invoke {@link DuringAnalysisAccess#requireAnalysisIteration()} each time we register new methods.
+    private static final int ANTICIPATED_SERVICES = 100;
+    private static final Set<Class<?>> registeredClasses = new HashSet<>(ANTICIPATED_SERVICES);
+
+    @Override
+    public void duringAnalysis(DuringAnalysisAccess access) {
+        for (Class<?> service : access.reachableSubtypes(org.hibernate.service.Service.class)) {
+            if (registeredClasses.add(service)) {
+                RuntimeReflection.registerAllMethods(service);
+                access.requireAnalysisIteration();
+            }
+        }
+    }
+}