Better support inheritance in Resource Methods

Signed-off-by: jansupol <jan.supol@oracle.com>

core-common/src/main/java/org/glassfish/jersey/internal/util/ReflectionHelper.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2022 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2010, 2023 Oracle and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0, which is available at
@@ -23,6 +23,7 @@
 import java.lang.reflect.AnnotatedElement;
 import java.lang.reflect.Array;
 import java.lang.reflect.Constructor;
+import java.lang.reflect.Executable;
 import java.lang.reflect.Field;
 import java.lang.reflect.GenericArrayType;
 import java.lang.reflect.Member;
@@ -444,7 +445,7 @@ public Object run() {
      * @see AccessController#doPrivileged(java.security.PrivilegedAction)
      */
     public static PrivilegedAction setAccessibleMethodPA(final Method m) {
-        if (Modifier.isPublic(m.getModifiers())) {
+        if (isPublic(m)) {
             return NoOpPrivilegedACTION;
         }
 
@@ -460,6 +461,24 @@ public Object run() {
         };
     }
 
+    /**
+     * Return {@code true} iff the method is public.
+     * @param clazz The method in question
+     * @return {@code true} if mod includes the public modifier; {@code false} otherwise.
+     */
+    public static boolean isPublic(Class<?> clazz) {
+        return Modifier.isPublic(clazz.getModifiers());
+    }
+
+    /**
+     * Return {@code true} iff the executable is public.
+     * @param executable The executable in question
+     * @return {@code true} if the executable includes the public modifier; {@code false} otherwise.
+     */
+    public static boolean isPublic(Executable executable) {
+        return Modifier.isPublic(executable.getModifiers());
+    }
+
     /**
      * Get the list of classes that represent the type arguments of a
      * {@link ParameterizedType parameterized} input type.
@@ -879,8 +898,7 @@ public static Collection<Class<? extends Annotation>> getAnnotationTypes(final A
      * @return {@code true} if the method is {@code getter}, {@code false} otherwise.
      */
     public static boolean isGetter(final Method method) {
-        if (method.getParameterTypes().length == 0
-                && Modifier.isPublic(method.getModifiers())) {
+        if (method.getParameterTypes().length == 0 && isPublic(method)) {
             final String methodName = method.getName();
 
             if (methodName.startsWith("get") && methodName.length() > 3) {
@@ -921,7 +939,7 @@ public static GenericType genericTypeFor(final Object instance) {
      * @return {@code true} if the method is {@code setter}, {@code false} otherwise.
      */
     public static boolean isSetter(final Method method) {
-        return Modifier.isPublic(method.getModifiers())
+        return isPublic(method)
                 && void.class.equals(method.getReturnType())
                 && method.getParameterTypes().length == 1
                 && method.getName().startsWith("set");

core-server/src/main/java/org/glassfish/jersey/server/model/internal/AbstractJavaResourceMethodDispatcher.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, 2022 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2023 Oracle and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0, which is available at
@@ -32,6 +32,7 @@
 import javax.ws.rs.core.Response;
 import javax.ws.rs.core.SecurityContext;
 
+import org.glassfish.jersey.internal.util.ReflectionHelper;
 import org.glassfish.jersey.message.internal.OutboundJaxrsResponse;
 import org.glassfish.jersey.message.internal.OutboundMessageContext;
 import org.glassfish.jersey.message.internal.TracingLogger;
@@ -68,12 +69,23 @@ abstract class AbstractJavaResourceMethodDispatcher implements ResourceMethodDis
     AbstractJavaResourceMethodDispatcher(final Invocable resourceMethod,
                                          final InvocationHandler methodHandler,
                                          final ConfiguredValidator validator) {
-        this.method = resourceMethod.getDefinitionMethod();
+        this.method = getPublic(resourceMethod.getHandlingMethod(), resourceMethod.getDefinitionMethod());
         this.methodHandler = methodHandler;
         this.resourceMethod = resourceMethod;
         this.validator = validator;
     }
 
+    private Method getPublic(Method handlingMethod, Method definitionMethod) {
+        if (handlingMethod == definitionMethod) {
+            return handlingMethod;
+        }
+
+        boolean publicHandling = ReflectionHelper.isPublic(handlingMethod)
+                && ReflectionHelper.isPublic(handlingMethod.getDeclaringClass());
+
+        return publicHandling ? handlingMethod : definitionMethod;
+    }
+
     @Override
     public final Response dispatch(Object resource, ContainerRequest request) throws ProcessingException {
         Response response = null;

core-server/src/test/java/org/glassfish/jersey/server/model/ResourceMethodDispatcherInheritanceTest.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2023 Oracle and/or its affiliates. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0, which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the
+ * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
+ * version 2 with the GNU Classpath Exception, which is available at
+ * https://www.gnu.org/software/classpath/license.html.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
+ */
+
+package org.glassfish.jersey.server.model;
+
+import org.glassfish.jersey.server.ApplicationHandler;
+import org.glassfish.jersey.server.ContainerResponse;
+import org.glassfish.jersey.server.RequestContextBuilder;
+import org.glassfish.jersey.server.ResourceConfig;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import java.util.concurrent.ExecutionException;
+
+public class ResourceMethodDispatcherInheritanceTest {
+    public interface ResourceIfc1 {
+        @GET
+        public void get();
+    }
+
+    @Path("/")
+    static class ResourceClass1 implements ResourceIfc1 {
+        public void get() {
+
+        }
+    }
+
+    interface ResourceIfc2 {
+        @GET
+        public void get();
+    }
+
+    @Path("/")
+    public static class ResourceClass2 implements ResourceIfc2 {
+        public void get() {
+
+        }
+    }
+
+    @Test
+    public void testInheritedMethodPublicClass() throws ExecutionException, InterruptedException {
+        ApplicationHandler app = new ApplicationHandler(new ResourceConfig(ResourceClass2.class));
+        ContainerResponse response;
+        response = app.apply(RequestContextBuilder.from("/", "GET").accept("text/plain").build()).get();
+        Assertions.assertEquals(204, response.getStatus());
+    }
+
+    @Test
+    public void testInheritedMethodPublicIface() throws ExecutionException, InterruptedException {
+        ApplicationHandler app = new ApplicationHandler(new ResourceConfig(ResourceClass1.class));
+        ContainerResponse response;
+        response = app.apply(RequestContextBuilder.from("/", "GET").accept("text/plain").build()).get();
+        Assertions.assertEquals(204, response.getStatus());
+    }
+}