package com.atlassian.event.internal;
   
   import com.google.common.collect.Sets;
   
   import java.util.Set;
   
   class ClassUtils {
       private ClassUtils() {
       }
  
      /**
       * Finds all super classes and interfaces for a given class
       *
       * @param cls The class to scan
       * @return The collected related classes found
       */
      static Set<Class<?>> findAllTypes(final Class<?> cls) {
          final Set<Class<?>> types = Sets.newLinkedHashSet();
          findAllTypes(cls, types);
          return types;
      }
  
      /**
       * Finds all super classes and interfaces for a given class
       *
       * @param cls   The class to scan
       * @param types The collected related classes found
       */
      static void findAllTypes(final Class<?> cls, final Set<Class<?>> types) {
          if (cls == null) {
              return;
          }
  
          // check to ensure it hasn't been scanned yet
          if (types.contains(cls)) {
              return;
          }
  
          types.add(cls);
  
          findAllTypes(cls.getSuperclass(), types);
          for (int x = 0; x < cls.getInterfaces().length; x++) {
              findAllTypes(cls.getInterfaces()[x], types);
          }
      }
  }