code: public static void doPreIntercept( InterceptorContext context, List/*< Interceptor >*/ interceptors )
              throws InterceptorException
      {
          if ( interceptors != null )
          {
              PreInvokeInterceptorChain chain = new PreInvokeInterceptorChain( context, interceptors );
              chain.continueChain();
          }
      }
docs: Execute a "pre" interceptor chain.  This will execute the
  {@link Interceptor#preInvoke(InterceptorContext, InterceptorChain)}
  method to be invoked on each interceptor in a chain.
  
  @param context the context for a set of interceptors
  @param interceptors the list of interceptors
  @throws InterceptorException