package org.junit.internal.builders;
   
   import java.util.Arrays;
   import java.util.List;
   
   import org.junit.runner.Runner;
   import org.junit.runners.model.RunnerBuilder;
   
   public class AllDefaultPossibilitiesBuilder extends RunnerBuilder {
      private final boolean canUseSuiteMethod;
  
      public AllDefaultPossibilitiesBuilder(boolean canUseSuiteMethod) {
          this.canUseSuiteMethod = canUseSuiteMethod;
      }
  
      @Override
      public Runner runnerForClass(Class<?> testClass) throws Throwable {
          List<RunnerBuilder> builders = Arrays.asList(
                  ignoredBuilder(),
                  annotatedBuilder(),
                  suiteMethodBuilder(),
                  junit3Builder(),
                  junit4Builder());
  
          for (RunnerBuilder each : builders) {
              Runner runner = each.safeRunnerForClass(testClass);
              if (runner != null) {
                  return runner;
              }
          }
          return null;
      }
  
      protected JUnit4Builder junit4Builder() {
          return new JUnit4Builder();
      }
  
      protected JUnit3Builder junit3Builder() {
          return new JUnit3Builder();
      }
  
      protected AnnotatedBuilder annotatedBuilder() {
          return new AnnotatedBuilder(this);
      }
  
      protected IgnoredBuilder ignoredBuilder() {
          return new IgnoredBuilder();
      }
  
      protected RunnerBuilder suiteMethodBuilder() {
          if (canUseSuiteMethod) {
              return new SuiteMethodBuilder();
          }
          return new NullBuilder();
      }
  }