private void getAllRolePermissions(RoleEntry parent, Set<PermissionEntry> rolePermissions) {
        rolePermissions.addAll(permissionStore.findByRoleId(parent.getId()));
        Set<RoleGroupEntry> roleGroupEntries = (Set<RoleGroupEntry>) roleGroupStore.findByGroupId(parent.getId());
        for (RoleGroupEntry entry : roleGroupEntries) {
            Optional<RoleEntry> role = (Optional<RoleEntry>) roleStore.findByRoleId(entry.getRoleId());
            getAllRolePermissions(role.get(), rolePermissions);
        }
    }
private void getAllRolePermissions(RoleEntry parent, Set<PermissionEntry> rolePermissions) {
        rolePermissions.addAll(permissionStore.findByRoleId(parent.getId()));
        Set<RoleGroupEntry> roleGroupEntries = (Set<RoleGroupEntry>) roleGroupStore.findByGroupId(parent.getId());
        for (RoleGroupEntry entry : roleGroupEntries) {
            Optional<RoleEntry> role = (Optional<RoleEntry>) roleStore.findByRoleId(entry.getRoleId());
            getAllRolePermissions(role.get(), rolePermissions);
        }
    }
private void getAllRolePermissions ( RoleEntry parent , Set < PermissionEntry > rolePermissions ) { rolePermissions . addAll ( permissionStore . findByRoleId ( parent . getId ( ) ) ) ; Set < RoleGroupEntry > roleGroupEntries = ( Set < RoleGroupEntry > ) roleGroupStore . findByGroupId ( parent . getId ( ) ) ; for ( RoleGroupEntry entry : roleGroupEntries ) { Optional < RoleEntry > role = ( Optional < RoleEntry > ) roleStore . findByRoleId ( entry . getRoleId ( ) ) ; getAllRolePermissions ( role . get ( ) , rolePermissions ) ; } }
Fill  permission list  with role and sub-role permissions recursively.

@param parent          Role to traverse.
@param rolePermissions list of all permissions of the given role.
Fill permission list with role and sub - role permissions recursively .