Include interfaces as bean types of RR resources

extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/main/java/io/quarkus/resteasy/reactive/server/deployment/ResteasyReactiveProcessor.java

@@ -16,6 +16,7 @@
 import java.util.Deque;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Iterator;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
@@ -733,7 +734,8 @@ private FilterClassIntrospector createFilterClassIntrospector() {
     public void transformEndpoints(
             ResourceScanningResultBuildItem resourceScanningResultBuildItem,
             ResourceInterceptorsBuildItem resourceInterceptorsBuildItem,
-            BuildProducer<io.quarkus.arc.deployment.AnnotationsTransformerBuildItem> annotationsTransformer) {
+            BuildProducer<io.quarkus.arc.deployment.AnnotationsTransformerBuildItem> annotationsTransformer,
+            BeanArchiveIndexBuildItem beanArchiveIndexBuildItem) {
 
         // all found resources and sub-resources
         Set<DotName> allResources = new HashSet<>();
@@ -774,7 +776,7 @@ public void transform(TransformationContext context) {
                         // check if the class is one of resources/sub-resources
                         if (allResources.contains(clazz.name())
                                 && clazz.declaredAnnotation(ResteasyReactiveDotNames.TYPED) == null) {
-                            context.transform().add(createTypedAnnotationInstance(clazz)).done();
+                            context.transform().add(createTypedAnnotationInstance(clazz, beanArchiveIndexBuildItem)).done();
                             return;
                         }
                         // check if the class is one of providers, either explicitly declaring the annotation
@@ -783,17 +785,52 @@ public void transform(TransformationContext context) {
                                 || filtersAndInterceptors.contains(clazz.name().toString()))
                                 && clazz.declaredAnnotation(ResteasyReactiveDotNames.TYPED) == null) {
                             // Add @Typed(MyResource.class)
-                            context.transform().add(createTypedAnnotationInstance(clazz)).done();
+                            context.transform().add(createTypedAnnotationInstance(clazz, beanArchiveIndexBuildItem)).done();
                         }
                     }
                 }));
     }
 
-    private AnnotationInstance createTypedAnnotationInstance(ClassInfo clazz) {
+    private AnnotationInstance createTypedAnnotationInstance(ClassInfo clazz,
+            BeanArchiveIndexBuildItem beanArchiveIndexBuildItem) {
+        Set<DotName> interfaceNames = new HashSet<>();
+        ClassInfo currentClazz = clazz;
+        while (!ResteasyReactiveDotNames.OBJECT.equals(currentClazz.name())) {
+            currentClazz.interfaceNames().forEach(iface -> interfaceNames.add(iface));
+            // inspect super class
+            currentClazz = beanArchiveIndexBuildItem.getIndex().getClassByName(currentClazz.superName());
+        }
+        Set<DotName> allInterfaces = new HashSet<>();
+        recursiveInterfaceSearch(interfaceNames, allInterfaces, beanArchiveIndexBuildItem);
+        AnnotationValue[] annotationValues = new AnnotationValue[allInterfaces.size() + 1];
+        // always add the bean impl class
+        annotationValues[0] = AnnotationValue.createClassValue("value",
+                Type.create(clazz.name(), Type.Kind.CLASS));
+        Iterator<DotName> iterator = allInterfaces.iterator();
+        for (int i = 1; i < annotationValues.length; i++) {
+            annotationValues[i] = AnnotationValue.createClassValue("value",
+                    Type.create(iterator.next(), Type.Kind.CLASS));
+        }
         return AnnotationInstance.create(ResteasyReactiveDotNames.TYPED, clazz,
                 new AnnotationValue[] { AnnotationValue.createArrayValue("value",
-                        new AnnotationValue[] { AnnotationValue.createClassValue("value",
-                                Type.create(clazz.name(), Type.Kind.CLASS)) }) });
+                        annotationValues) });
+    }
+
+    private void recursiveInterfaceSearch(Set<DotName> interfacesToProcess, Set<DotName> allDiscoveredInterfaces,
+            BeanArchiveIndexBuildItem beanArchiveIndexBuildItem) {
+        allDiscoveredInterfaces.addAll(interfacesToProcess);
+        Set<DotName> additionalInterfacesToProcess = new HashSet<>();
+        for (DotName name : interfacesToProcess) {
+            ClassInfo clazz = beanArchiveIndexBuildItem.getIndex().getClassByName(name);
+            if (clazz != null) {
+                // get all interface that this interface extends
+                additionalInterfacesToProcess.addAll(clazz.interfaceNames());
+            }
+        }
+        if (!additionalInterfacesToProcess.isEmpty()) {
+            // recursively process newly found interfaces
+            recursiveInterfaceSearch(additionalInterfacesToProcess, allDiscoveredInterfaces, beanArchiveIndexBuildItem);
+        }
     }
 
     private Collection<DotName> additionalContextTypes(List<ContextTypeBuildItem> contextTypeBuildItems) {

extensions/resteasy-reactive/rest-client-reactive/deployment/src/test/java/io/quarkus/rest/client/reactive/beanTypes/Alpha.java

@@ -0,0 +1,4 @@
+package io.quarkus.rest.client.reactive.beanTypes;
+
+public interface Alpha extends Delta {
+}

extensions/resteasy-reactive/rest-client-reactive/deployment/src/test/java/io/quarkus/rest/client/reactive/beanTypes/Beta.java

@@ -0,0 +1,4 @@
+package io.quarkus.rest.client.reactive.beanTypes;
+
+public interface Beta extends Delta {
+}

extensions/resteasy-reactive/rest-client-reactive/deployment/src/test/java/io/quarkus/rest/client/reactive/beanTypes/Charlie.java

@@ -0,0 +1,4 @@
+package io.quarkus.rest.client.reactive.beanTypes;
+
+public interface Charlie extends Beta {
+}

extensions/resteasy-reactive/rest-client-reactive/deployment/src/test/java/io/quarkus/rest/client/reactive/beanTypes/Client.java

@@ -0,0 +1,17 @@
+package io.quarkus.rest.client.reactive.beanTypes;
+
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+
+import org.eclipse.microprofile.rest.client.inject.RegisterRestClient;
+
+@Path("/")
+@RegisterRestClient(configKey = "hello2")
+public interface Client extends Alpha {
+    @GET
+    @Produces(MediaType.TEXT_PLAIN)
+    String test();
+
+}

extensions/resteasy-reactive/rest-client-reactive/deployment/src/test/java/io/quarkus/rest/client/reactive/beanTypes/ClientMock.java

@@ -0,0 +1,20 @@
+package io.quarkus.rest.client.reactive.beanTypes;
+
+import javax.enterprise.context.ApplicationScoped;
+import javax.enterprise.inject.Alternative;
+
+import org.eclipse.microprofile.rest.client.inject.RestClient;
+
+import io.quarkus.arc.Priority;
+
+@Alternative()
+@Priority(1)
+@ApplicationScoped
+@RestClient
+public class ClientMock implements Client, Charlie {
+
+    @Override
+    public String test() {
+        return "hello from " + ClientMock.class;
+    }
+}

extensions/resteasy-reactive/rest-client-reactive/deployment/src/test/java/io/quarkus/rest/client/reactive/beanTypes/Delta.java

@@ -0,0 +1,4 @@
+package io.quarkus.rest.client.reactive.beanTypes;
+
+public interface Delta {
+}

extensions/resteasy-reactive/rest-client-reactive/deployment/src/test/java/io/quarkus/rest/client/reactive/beanTypes/MyBean.java

@@ -0,0 +1,18 @@
+package io.quarkus.rest.client.reactive.beanTypes;
+
+import javax.enterprise.context.ApplicationScoped;
+import javax.inject.Inject;
+
+import org.eclipse.microprofile.rest.client.inject.RestClient;
+
+@ApplicationScoped
+public class MyBean {
+
+    @Inject
+    @RestClient
+    Client client;
+
+    String test() {
+        return client.test();
+    }
+}

extensions/resteasy-reactive/rest-client-reactive/deployment/src/test/java/io/quarkus/rest/client/reactive/beanTypes/ResourceBeanTypeTest.java

@@ -0,0 +1,47 @@
+package io.quarkus.rest.client.reactive.beanTypes;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.Set;
+
+import javax.enterprise.context.ApplicationScoped;
+import javax.enterprise.inject.spi.Bean;
+import javax.enterprise.inject.spi.BeanManager;
+import javax.inject.Inject;
+
+import org.eclipse.microprofile.rest.client.inject.RestClient;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.quarkus.arc.Arc;
+import io.quarkus.test.QuarkusUnitTest;
+
+/**
+ * Tests that resources processed by RR have bean types equivalent to that of the impl class plus all interfaces in
+ * their hierarchy
+ */
+public class ResourceBeanTypeTest {
+
+    @RegisterExtension
+    static final QuarkusUnitTest TEST = new QuarkusUnitTest()
+            .withApplicationRoot((jar) -> jar
+                    .addClasses(Client.class, ClientMock.class, MyBean.class, Alpha.class, Beta.class,
+                            Charlie.class, Delta.class));
+
+    @Inject
+    MyBean myBean;
+
+    @Test
+    void shouldHaveAllInterfaceTypes() {
+        // firstly, sanity check
+        assertThat(myBean.test()).isEqualTo("hello from " + ClientMock.class);
+
+        // now see what types does the Client bean have - the impl class and all interfaces should be in place
+        BeanManager beanManager = Arc.container().beanManager();
+        Set<Bean<?>> beans = beanManager.getBeans(Client.class, RestClient.LITERAL);
+        Bean<?> resolvedBean = beanManager.resolve(beans);
+        assertThat(resolvedBean.getScope()).isEqualTo(ApplicationScoped.class);
+        assertThat(resolvedBean.getTypes()).contains(Client.class, ClientMock.class, Alpha.class, Beta.class, Charlie.class,
+                Delta.class);
+    }
+}