private void validatePermissions(ShareACL acl) {

    if (acl == null) {
      return;
    }
    /*
     * String permissionTypeValue = acl.getPermissionType(); try {
     * SharePermissionType permissionType = SharePermissionType
     * .valueOf(permissionTypeValue.toUpperCase()); if (permissionType !=
     * null) { acl.proceedToNextStep(); } } catch (Exception e) {
     * _log.error("Invalid value for permission type: {}",
     * permissionTypeValue);
     * acl.cancelNextStep(ShareACLOperationErrorType.INVALID_PERMISSION_TYPE
     * ); return; }
     */
    String permissionValue = acl.getPermission();
    try {
      SharePermission permission = SharePermission.valueOf(permissionValue.toUpperCase());
      if (permission != null) {
        acl.setPermission(getFormattedPermissionText(permission));
        acl.proceedToNextStep();
      }
    } catch (Exception e) {
      _log.error("Invalid value for permission: {}", permissionValue);
      acl.cancelNextStep(ShareACLOperationErrorType.INVALID_PERMISSION);
      return;
    }

    if (this.snapshot != null) {
      // Snapshot share permission must be read only
      if (!SharePermission.READ.name().equalsIgnoreCase(acl.getPermission())) {
        _log.error("Snapshot permission should be read only");
        acl.cancelNextStep(ShareACLOperationErrorType.SNAPSHOT_SHARE_SHOULD_BE_READ_ONLY);
      }
    }
  }
  private void reportAddErrors(CifsShareACLUpdateParams param) {

    String opName = ShareACLOperationType.ADD.name();
    // Report Add ACL Errors
    ShareACLs shareAcls = param.getAclsToAdd();
    if (shareAcls == null || shareAcls.getShareACLs().size() == 0) return;

    List<ShareACL> shareAclList = shareAcls.getShareACLs();
    for (ShareACL acl : shareAclList) {
      if (!acl.canProceedToNextStep()) {
        ShareACLOperationErrorType error = acl.getErrorType();

        switch (error) {
          case SNAPSHOT_SHARE_SHOULD_BE_READ_ONLY:
            {
              throw APIException.badRequests.snapshotSMBSharePermissionReadOnly();
            }

          case INVALID_PERMISSION:
            {
              if (acl.getPermission() != null) {
                throw APIException.badRequests.invalidPermissionForACL(acl.getPermission());
              } else {
                throw APIException.badRequests.missingValueInACE(opName, REQUEST_PARAM_PERMISSION);
              }
            }

          case USER_AND_GROUP_PROVIDED:
            {
              throw APIException.badRequests.bothUserAndGroupInACLFound(
                  acl.getUser(), acl.getGroup());
            }

          case USER_OR_GROUP_NOT_PROVIDED:
            {
              throw APIException.badRequests.missingUserOrGroupInACE(opName);
            }

          case MULTIPLE_ACES_WITH_SAME_USER_OR_GROUP:
            {
              String userOrGroup = acl.getUser() == null ? acl.getGroup() : acl.getUser();

              throw APIException.badRequests.multipleACLsWithUserOrGroupFound(opName, userOrGroup);
            }

          case MULTIPLE_DOMAINS_FOUND:
            {
              String domain1 = acl.getDomain();
              String userOrGroup = acl.getUser() == null ? acl.getGroup() : acl.getUser();
              String domain2 = userOrGroup.substring(0, userOrGroup.indexOf("\\"));
              throw APIException.badRequests.multipleDomainsFound(opName, domain1, domain2);
            }

          case ACL_EXISTS:
            {
              throw APIException.badRequests.shareACLAlreadyExists(opName, acl.toString());
            }
            // case ACL_NOT_FOUND:
          default:
            break;
        }
      }
    }
  }