package org.apache.maven.surefire.common.junit4;

 /*

  * 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.NonAbstractClassFilter;

 import org.apache.maven.surefire.common.junit3.JUnit3TestChecker;

 import org.apache.maven.surefire.util.ReflectionUtils;

 import org.apache.maven.surefire.util.ScannerFilter;

 import java.lang.annotation.Annotation;

 import java.lang.reflect.Method;

 /**

  * @author Kristian Rosenvold

  */

 public class JUnit4TestChecker

     implements ScannerFilter

 {

     private final NonAbstractClassFilter nonAbstractClassFilter;

     private final Class runWith;

     private final JUnit3TestChecker jUnit3TestChecker;

     public JUnit4TestChecker( ClassLoader testClassLoader )

     {

         this.jUnit3TestChecker = new JUnit3TestChecker( testClassLoader );

         this.runWith = getJUnitClass( testClassLoader, org.junit.runner.RunWith.class.getName() );

         this.nonAbstractClassFilter = new NonAbstractClassFilter();

     }

     public boolean accept( Class testClass )

     {

         return jUnit3TestChecker.accept( testClass ) || isValidJUnit4Test( testClass );

     }

     @SuppressWarnings( { "unchecked" } )

     private boolean isValidJUnit4Test( Class testClass )

     {

         if ( !nonAbstractClassFilter.accept( testClass ) )

         {

             return false;

         }

         Annotation runWithAnnotation = testClass.getAnnotation( runWith );

         if ( runWithAnnotation != null )

         {

             return true;

         }

         Class classToCheck = testClass;

         while ( classToCheck != null )

         {

             if ( checkforTestAnnotatedMethod( classToCheck ) )

             {

                 return true;

             }

             classToCheck = classToCheck.getSuperclass();

         }

         return false;

     }

     private boolean checkforTestAnnotatedMethod( Class testClass )

     {

         for ( Method lMethod : testClass.getDeclaredMethods() )

         {

             for ( Annotation lAnnotation : lMethod.getAnnotations() )

             {

                 if ( org.junit.Test.class.isAssignableFrom( lAnnotation.annotationType() ) )

                 {

                     return true;

                 }

             }

         }

         return false;

     }

     private Class getJUnitClass( ClassLoader classLoader, String className )

     {

         return ReflectionUtils.tryLoadClass( classLoader, className );

     }

 }