Method Details

• resolve

  AccessCheckResult resolve(List<AccessCheckResult> results, NavigationContext context)

  Determines if access is granted for a specific navigation context, based on the decisions provided by NavigationAccessCheckers.

  The decision resolver should grant access or deny it by returning an appropriate AccessCheckResult object.

  The expected result of the method should be AccessCheckDecision.ALLOW or AccessCheckDecision.DENY, or AccessCheckDecision.REJECT.

  A AccessCheckDecision.NEUTRAL result does not make because it does not provide meaningful information to NavigationAccessControl to complete the access check process. For this reason, a neutral result will produce the same effect as AccessCheckDecision.REJECT, preventing the navigation and failing with an exception in development mode.

  
   AccessCheckResult resolve(List<Result> results,
           NavigationContext context) {
  
       Map<Decision, Long> votes = results.stream()
               .collect(groupingBy(Result::decision, counting()));
  
       int allow = votes.getOrDefault(Decision.ALLOW, 0L).intValue();
       int deny = votes.getOrDefault(Decision.ALLOW, 0L).intValue();
       int diff = allow - deny;
  
       if (allow == 0 && deny == 0) {
           return AccessCheckResult.neutral();
       } else if (diff > 0) {
           return AccessCheckResult.allow();
       } else if (diff < 0) {
           return AccessCheckResult.deny(String
                   .format("Allow %d - Deny %d. Deny wins!", allow, deny));
       }
       return AccessCheckResult
               .reject("To allow, or not to allow, that is the question.");
   }
   

  Result object can also be created using NavigationContext helpers NavigationContext.allow(), NavigationContext.deny(String), NavigationContext.reject(String) and NavigationContext.neutral().

  Parameters:

  results - the decisions from access checkers.

  context - the current navigation context

  Returns:

  a result indicating weather the access to target view should be granted or not, never null.