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    * 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.maven.surefire.junitplatform;
  
  import java.lang.reflect.Method;
  
  import org.apache.maven.surefire.api.util.ReflectionUtils;
  import org.junit.platform.launcher.Launcher;
  import org.junit.platform.launcher.LauncherDiscoveryRequest;
  import org.junit.platform.launcher.TestExecutionListener;
  import org.junit.platform.launcher.TestPlan;
  
  import static java.util.Objects.requireNonNull;
  import static org.apache.maven.surefire.junitplatform.CancellationTokenAdapter.CANCELLATION_TOKEN_CLASS;
  
  final class LauncherAdapter {
  
      static final Class<?> LAUNCHER_EXECUTION_REQUEST_CLASS = loadLauncherExecutionRequestClass();
      static final Method EXECUTE_METHOD_WITH_LAUNCHER_EXECUTION_REQUEST_PARAMETER =
              findExecuteMethodWithLauncherExecutionRequestParameter();
  
      private final Launcher delegate;
      private final CancellationTokenAdapter cancellationToken;
  
      LauncherAdapter(Launcher delegate, CancellationTokenAdapter cancellationToken) {
          this.delegate = delegate;
          this.cancellationToken = cancellationToken;
      }
  
      TestPlan discover(LauncherDiscoveryRequest discoveryRequest) {
          return delegate.discover(discoveryRequest);
      }
  
      void execute(LauncherDiscoveryRequest discoveryRequest, TestExecutionListener... listeners) {
          if (cancellationToken == null) {
              executeWithoutCancellationToken(discoveryRequest, listeners);
          } else {
              executeWithCancellationToken(discoveryRequest, listeners);
          }
      }
  
      void executeWithoutCancellationToken(
              LauncherDiscoveryRequest discoveryRequest, TestExecutionListener... listeners) {
          delegate.execute(discoveryRequest, listeners);
      }
  
      private void executeWithCancellationToken(
              LauncherDiscoveryRequest discoveryRequest, TestExecutionListener... listeners) {
  
          Method executeMethod = requireNonNull(EXECUTE_METHOD_WITH_LAUNCHER_EXECUTION_REQUEST_PARAMETER);
          Object executionRequest = createExecutionRequest(discoveryRequest, listeners);
          ReflectionUtils.invokeMethodWithArray(delegate, executeMethod, executionRequest);
      }
  
      private static Method findExecuteMethodWithLauncherExecutionRequestParameter() {
          if (LAUNCHER_EXECUTION_REQUEST_CLASS == null) {
              return null;
          }
          return ReflectionUtils.getMethod(Launcher.class, "execute", LAUNCHER_EXECUTION_REQUEST_CLASS);
      }
  
      private static Class<?> loadLauncherExecutionRequestClass() {
          return ReflectionUtils.tryLoadClass(
                  Launcher.class.getClassLoader(), "org.junit.platform.launcher.LauncherExecutionRequest");
      }
  
      private Object createExecutionRequest(
              LauncherDiscoveryRequest discoveryRequest, TestExecutionListener[] listeners) {
  
          Object builder = createLauncherExecutionRequestBuilder(discoveryRequest);
          ReflectionUtils.invokeSetter(builder, "listeners", TestExecutionListener[].class, listeners);
          ReflectionUtils.invokeSetter(
                  builder, "cancellationToken", CANCELLATION_TOKEN_CLASS, cancellationToken.getDelegate());
          return ReflectionUtils.invokeGetter(builder, "build");
      }
  
      private static Object createLauncherExecutionRequestBuilder(LauncherDiscoveryRequest discoveryRequest) {
          ClassLoader classLoader = discoveryRequest.getClass().getClassLoader();
          Class<?> builderClass = ReflectionUtils.loadClass(
                  classLoader, "org.junit.platform.launcher.core.LauncherExecutionRequestBuilder");
          Class<?>[] parameterTypes = {LauncherDiscoveryRequest.class};
          Object[] parameters = {discoveryRequest};
          return ReflectionUtils.invokeStaticMethod(builderClass, "request", parameterTypes, parameters);
     }
 }