package org.junit.internal.runners;
   
   import junit.extensions.TestDecorator;
   import junit.framework.AssertionFailedError;
   import junit.framework.Test;
   import junit.framework.TestCase;
   import junit.framework.TestListener;
   import junit.framework.TestResult;
   import junit.framework.TestSuite;
  import org.junit.runner.Describable;
  import org.junit.runner.Description;
  import org.junit.runner.Runner;
  import org.junit.runner.manipulation.Filter;
  import org.junit.runner.manipulation.Filterable;
  import org.junit.runner.manipulation.NoTestsRemainException;
  import org.junit.runner.manipulation.Sortable;
  import org.junit.runner.manipulation.Sorter;
  import org.junit.runner.notification.Failure;
  import org.junit.runner.notification.RunNotifier;
  import java.lang.annotation.Annotation;
  import java.lang.reflect.Method;
  
  public class JUnit38ClassRunner extends Runner implements Filterable, Sortable {
      private static final class OldTestClassAdaptingListener implements
              TestListener {
          private final RunNotifier notifier;
  
          private OldTestClassAdaptingListener(RunNotifier notifier) {
              this.notifier = notifier;
          }
  
          public void endTest(Test test) {
              notifier.fireTestFinished(asDescription(test));
          }
  
          public void startTest(Test test) {
              notifier.fireTestStarted(asDescription(test));
          }
  
          // Implement junit.framework.TestListener
          public void addError(Test test, Throwable e) {
              Failure failure = new Failure(asDescription(test), e);
              notifier.fireTestFailure(failure);
          }
  
          private Description asDescription(Test test) {
              if (test instanceof Describable) {
                  Describable facade = (Describable) test;
                  return facade.getDescription();
              }
              return Description.createTestDescription(getEffectiveClass(test), getName(test));
          }
  
          private Class<? extends Test> getEffectiveClass(Test test) {
              return test.getClass();
          }
  
          private String getName(Test test) {
              if (test instanceof TestCase) {
                  return ((TestCase) test).getName();
              } else {
                  return test.toString();
              }
          }
  
          public void addFailure(Test test, AssertionFailedError t) {
              addError(test, t);
          }
      }
  
      private volatile Test test;
  
      public JUnit38ClassRunner(Class<?> klass) {
          this(new TestSuite(klass.asSubclass(TestCase.class)));
      }
  
      public JUnit38ClassRunner(Test test) {
          super();
          setTest(test);
      }
  
      @Override
      public void run(RunNotifier notifier) {
          TestResult result = new TestResult();
          result.addListener(createAdaptingListener(notifier));
          getTest().run(result);
      }
  
      public TestListener createAdaptingListener(final RunNotifier notifier) {
          return new OldTestClassAdaptingListener(notifier);
      }
  
      @Override
      public Description getDescription() {
          return makeDescription(getTest());
      }
  
      private static Description makeDescription(Test test) {
          if (test instanceof TestCase) {
             TestCase tc = (TestCase) test;
             return Description.createTestDescription(tc.getClass(), tc.getName(),
                     getAnnotations(tc));
         } else if (test instanceof TestSuite) {
             TestSuite ts = (TestSuite) test;
             String name = ts.getName() == null ? createSuiteDescription(ts) : ts.getName();
             Description description = Description.createSuiteDescription(name);
             int n = ts.testCount();
             for (int i = 0; i < n; i++) {
                 Description made = makeDescription(ts.testAt(i));
                 description.addChild(made);
             }
             return description;
         } else if (test instanceof Describable) {
             Describable adapter = (Describable) test;
             return adapter.getDescription();
         } else if (test instanceof TestDecorator) {
             TestDecorator decorator = (TestDecorator) test;
             return makeDescription(decorator.getTest());
         } else {
             // This is the best we can do in this case
             return Description.createSuiteDescription(test.getClass());
         }
     }
 
     /**
      * Get the annotations associated with given TestCase.
      * @param test the TestCase.
      */
     private static Annotation[] getAnnotations(TestCase test) {
         try {
             Method m = test.getClass().getMethod(test.getName());
             return m.getDeclaredAnnotations();
         } catch (SecurityException e) {
         } catch (NoSuchMethodException e) {
         }
         return new Annotation[0];
     }
 
     private static String createSuiteDescription(TestSuite ts) {
         int count = ts.countTestCases();
         String example = count == 0 ? "" : String.format(" [example: %s]", ts.testAt(0));
         return String.format("TestSuite with %s tests%s", count, example);
     }
 
     public void filter(Filter filter) throws NoTestsRemainException {
         if (getTest() instanceof Filterable) {
             Filterable adapter = (Filterable) getTest();
             adapter.filter(filter);
         } else if (getTest() instanceof TestSuite) {
             TestSuite suite = (TestSuite) getTest();
             TestSuite filtered = new TestSuite(suite.getName());
             int n = suite.testCount();
             for (int i = 0; i < n; i++) {
                 Test test = suite.testAt(i);
                 if (filter.shouldRun(makeDescription(test))) {
                     filtered.addTest(test);
                 }
             }
             setTest(filtered);
             if (filtered.testCount() == 0) {
                 throw new NoTestsRemainException();
             }
         }
     }
 
     public void sort(Sorter sorter) {
         if (getTest() instanceof Sortable) {
             Sortable adapter = (Sortable) getTest();
             adapter.sort(sorter);
         }
     }
 
     private void setTest(Test test) {
         this.test = test;
     }
 
     private Test getTest() {
         return test;
     }
 }