code: private void checkParams()
     {
        if (adminIdentity == null)
        {
           throw new IllegalArgumentException("Admin identity is not configured");
        }
  
        StringTokenizer listTokenizer = new StringTokenizer(adminIdentity, AccessControlList.DELIMITER);
  
        if (listTokenizer.countTokens() < 1)
        {
           throw new IllegalArgumentException("AccessControlList " + adminIdentity + " is empty or have a bad format");
        }
  
        adminIdentitys = new ArrayList<String>(listTokenizer.countTokens());
  
        while (listTokenizer.hasMoreTokens())
        {
           adminIdentitys.add(listTokenizer.nextToken());
        }
        if (defaultIdentity == null)
        {
           defaultIdentity = IdentityConstants.ANY;
        }
  
     }
docs: Check read params and initialize.
  
  @throws RepositoryConfigurationException