EDIT

    // @Override

    public <T extends CdmBase> Collection<CdmAuthority> findUserPermissions(Class<T> cdmType, EnumSet<CRUD> crud) {

        Set<CdmAuthority> matches = new HashSet<>();

        CdmPermissionClass permissionClass = CdmPermissionClass.getValueOf(cdmType);

        Collection<? extends GrantedAuthority> authorities = getAuthentication().getAuthorities();

        for(GrantedAuthority ga : authorities){

            try {

                CdmAuthority cdmAuthority = CdmAuthority.fromGrantedAuthority(ga);

                if(cdmAuthority.getPermissionClass().equals(permissionClass)){

                    if(cdmAuthority.getOperation().containsAll(crud)){

                        matches.add(cdmAuthority);

                    }

                }

            } catch (CdmAuthorityParsingException e) {

                continue;

            }

        }

        return matches;

    }

    /**

     * Scans the currently authenticated user for CdmAuthorities which match the given parameters

     *

     * @param cdmType

     * @param crud

     * @return

     */

    public <T extends CdmBase> Collection<CdmAuthority> findUserPermissions(Class<T> cdmType, EnumSet<CRUD> crud);