package top.infra.test.classloader;
   
   import org.junit.runners.model.InitializationError;
   
   import java.net.URLClassLoader;
   import java.util.Arrays;
   
   public class ClassUtils {
   
      public static Class<?> loadFromCustomClassloader(final ClassLoader classLoader, final Class<?> clazz) throws InitializationError {
          try {
              final Class<?> loaded;
              loaded = Class.forName(clazz.getName(), true, classLoader);
              //loaded = customClassLoader.loadClass(clazz.getName()); // attempted  duplicate class definition
              return loaded;
          } catch (final ClassNotFoundException ex) {
              throw new InitializationError(ex);
          }
      }
  
      public static String printClassLoader(final Class<?> target) {
          final ClassLoader classLoader = target.getClassLoader();
  
          final String result;
  
          if (classLoader instanceof URLClassLoader) {
              result = target.getName()
                  + "/classLoader = "
                  + classLoader
                  + "/URLs/" + Arrays.asList(((URLClassLoader) classLoader).getURLs());
          } else {
              result = target.getName() + "/classLoader = " + classLoader;
          }
          System.out.println(result);
  
          return result;
      }
  }