code: AppConfigurationEntry[] getAppConfigurationEntry(String config)
      {
          Vector entry = null;
          if ((_fileMap != null) && (_fileMap.size() != 0)) {
              entry = (Vector) _fileMap.get(config);
          }
  
          if (entry == null || entry.size() == 0)
          {
              return null;
          }
  
          int appSize = entry.size();
          AppConfigurationEntry appConfig[] = new AppConfigurationEntry[appSize];
          Iterator it = entry.iterator();
          for (int i = 0; it.hasNext(); i++)
          {
              AppConfigurationEntry appCfg = (AppConfigurationEntry) it.next();
              appConfig[i] = new AppConfigurationEntry(appCfg.getLoginModuleName(), appCfg.getControlFlag(), appCfg.getOptions());
          }
          return appConfig;
      }
docs: This method returns an AppConfigurationEntry from internal storage based on the input key or alias.
  
  @param config String that is used as the key or alias to fetch AppConfigurationEntry information for.
  @return The AppConfigurationEntry for the supplied alias.
  @see com.ibm.ws.security.auth.login.Configuration
  @see javax.security.auth.login.Configuration
  @see javax.security.auth.login.AppConfigurationEntry