from zope.interface import implements
from interfaces import ILinkIntegrityNotificationException
from OFS.ObjectManager import BeforeDeleteException


class LinkIntegrityNotificationException(BeforeDeleteException):
    """ an exception indicating a prevented link integrity breach """
    implements(ILinkIntegrityNotificationException)

    def __str__(self):
        args = self.args
        if args and isinstance(args, tuple):
            return repr(args[0])
        return super(LinkIntegrityNotificationException, self).__str__()