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public class MyInterceptor implements Interceptor {
  // ...
  public String intercept(ActionInvocation invocation) throws Exception {
    
    invocation.addPreResultListener(new PreResultListener() {

      public void beforeResult(ActionInvocation invocation, String resultCode) {
        Map resultsMap = invocation.getProxy().getConfig().getResults();
        ResultConfig finalResultConfig = resultsMap.get(resultCode);

          // do something interesting with the 'to-be' executed result

        }

      });

    return invocation.invoke();
  }
  // ...
}