content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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
   *
   *      http://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.apache.camel.component.bean;
  
  import java.util.Collections;
  
  import net.bytebuddy.ByteBuddy;
  import net.bytebuddy.description.modifier.Ownership;
  import net.bytebuddy.description.modifier.SyntheticState;
  import net.bytebuddy.description.modifier.Visibility;
  import net.bytebuddy.implementation.MethodDelegation;
  import net.bytebuddy.implementation.bind.annotation.RuntimeType;
  import org.apache.camel.CamelContext;
  import org.apache.camel.Handler;
  import org.apache.camel.spi.Registry;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.Mock;
  import org.mockito.junit.jupiter.MockitoExtension;
  
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.mockito.Mockito.lenient;
  
  @ExtendWith(MockitoExtension.class)
  public class BeanInfoTest {
  
      @Mock
      private CamelContext context;
  
      @Mock
      private Registry registry;
  
      private BeanComponent beanComponent;
  
      @BeforeEach
      public void setup() {
          beanComponent = new BeanComponent();
          lenient().when(context.getComponent("bean", BeanComponent.class)).thenReturn(beanComponent);
          lenient().when(context.getRegistry()).thenReturn(registry);
          lenient()
                  .when(registry.findByType(ParameterMappingStrategy.class))
                  .thenReturn(Collections.EMPTY_SET);
      }
  
      @Test
      public void testHandlerClass() {
          BeanInfo info = new BeanInfo(context, MyClass.class);
          assertTrue(info.hasAnyMethodHandlerAnnotation());
      }
  
      @Test
      public void testHandlerOnSyntheticProxy() {
          Object proxy = buildProxyObject();
  
          BeanInfo info = new BeanInfo(context, proxy.getClass());
          assertTrue(info.hasAnyMethodHandlerAnnotation());
      }
  
      @Test
      public void testHandlerOnDerived() {
          BeanInfo info = new BeanInfo(context, MyDerivedClass.class);
          assertFalse(info.hasAnyMethodHandlerAnnotation());
      }
  
      @Test
      public void testHandlerInFunctionalInterfaceWithLambda() {
          MyHandlerInterface mhi = (MyHandlerInterface) () -> null;
  
          BeanInfo info = new BeanInfo(context, mhi.getClass());
          assertTrue(info.hasAnyMethodHandlerAnnotation());
      }
  
      @Test
      public void testHandlerInFunctionalInterfaceWithMethodReference() {
          MyClass myClass = new MyClass();
          MyHandlerInterface mhi = (MyHandlerInterface) myClass::myOtherMethod;
          BeanInfo info = new BeanInfo(context, mhi.getClass());
          assertTrue(info.hasAnyMethodHandlerAnnotation());
      }
  
      @Test
      public void testHandlerInFunctionalInterfaceWithAnonymousInnerClass() {
          MyHandlerInterface mhi = new MyHandlerInterface() {
              @Override
              public String myMethod() {
                  return "";
              }
          };
  
          BeanInfo info = new BeanInfo(context, mhi.getClass());
          assertTrue(info.hasAnyMethodHandlerAnnotation());
      }
  
      private Object buildProxyObject() {
          try {
              return new ByteBuddy()
                      .subclass(MyClass.class)
                      .modifiers(SyntheticState.SYNTHETIC, Visibility.PUBLIC, Ownership.STATIC)
                      .method(named("myMethod"))
                      .intercept(MethodDelegation.to(
                              new Object() {
                                  @RuntimeType
                                  public void intercept() {
                                  }
                              }))
                      .make()
                      .load(getClass().getClassLoader())
                      .getLoaded()
                      .getDeclaredConstructor()
                      .newInstance();
  
          } catch (Exception ignored) {
              return new Object();
          }
      }
  
      public static class MyClass {
          @Handler
          public void myMethod() {
          }
  
          public String myOtherMethod() {
              return "";
          }
      }
  
      public static class MyDerivedClass extends MyClass {
          @Override
          public void myMethod() {
          }
      }
  
      @FunctionalInterface
      public interface MyHandlerInterface {
          @Handler
          String myMethod();
      }
  
  }
  