package org.apache.maven.surefire.booter;
   
   /*
    * 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.
   */
  
  import org.apache.maven.surefire.providerapi.SurefireProvider;
  
  import java.lang.reflect.InvocationHandler;
  import java.lang.reflect.Method;
  import java.lang.reflect.Proxy;
  
  /**
   * Creates the surefire provider.
   * <p/>
   * Todo: This class does a little bit too little ;)
   *
   * @author Kristian Rosenvold
   */
  public class ProviderFactory
  {
      private final StartupConfiguration startupConfiguration;
  
      private final ProviderConfiguration providerConfiguration;
  
      private final ClassLoader surefireClassLoader;
  
      private final ClassLoader testsClassLoader;
  
      private final SurefireReflector surefireReflector;
  
  
      public ProviderFactory( StartupConfiguration startupConfiguration, ProviderConfiguration providerConfiguration,
                              ClassLoader surefireClassLoader, ClassLoader testsClassLoader )
      {
          this.providerConfiguration = providerConfiguration;
          this.surefireClassLoader = surefireClassLoader;
          this.startupConfiguration = startupConfiguration;
          this.surefireReflector = new SurefireReflector( surefireClassLoader );
          this.testsClassLoader = testsClassLoader;
      }
  
      public SurefireProvider createProvider()
      {
          ClassLoader context = java.lang.Thread.currentThread().getContextClassLoader();
          Thread.currentThread().setContextClassLoader( surefireClassLoader );
  
          StartupConfiguration starterConfiguration = startupConfiguration;
          final Object o = surefireReflector.createBooterConfiguration();
          surefireReflector.setTestSuiteDefinitionAware( o, providerConfiguration.getTestSuiteDefinition() );
          surefireReflector.setProviderPropertiesAware( o, providerConfiguration.getProviderProperties() );
          surefireReflector.setReporterConfigurationAware( o, providerConfiguration.getReporterConfiguration() );
          surefireReflector.setTestClassLoaderAware( o, surefireClassLoader, testsClassLoader );
          surefireReflector.setTestArtifactInfoAware( o, providerConfiguration.getTestArtifact() );
          surefireReflector.setIfDirScannerAware( o, providerConfiguration.getDirScannerParams() );
  
          Object provider = surefireReflector.instantiateProvider( starterConfiguration.getProviderClassName(), o );
          Thread.currentThread().setContextClassLoader( context );
  
          return createClassLoaderProxy( provider );
      }
  
      private SurefireProvider createClassLoaderProxy( Object target )
      {
          return (SurefireProvider) Proxy.newProxyInstance( this.getClass().getClassLoader(),
                                                            new Class[]{ SurefireProvider.class },
                                                            new ClassLoaderProxy( target ) );
      }
  
      private class ClassLoaderProxy
          implements InvocationHandler
      {
          private final Object target;
  
          public ClassLoaderProxy( Object delegate )
          {
              this.target = delegate;
          }
  
          public Object invoke( Object proxy, Method method, Object[] args )
              throws Throwable
          {
              ClassLoader original = java.lang.Thread.currentThread().getContextClassLoader();
              Thread.currentThread().setContextClassLoader( testsClassLoader );
             try
             {
                 Method delegateMethod = target.getClass().getMethod( method.getName(), method.getParameterTypes() );
                 final Object result = delegateMethod.invoke( target, args );
                 return surefireReflector.convertIfRunResult( result );
             }
             finally
             {
                 Thread.currentThread().setContextClassLoader( original );
             }
         }
     }
 
 }