# Copyright (c) 2003-2008 Ralph Meijer
# See LICENSE for details.

class Error(Exception):
    msg = ''

    def __str__(self):
        return self.msg

class NodeNotFound(Error):
    pass

class NodeExists(Error):
    pass

class NotSubscribed(Error):
    """
    Entity is not subscribed to this node.
    """

class SubscriptionExists(Error):
    pass

class Forbidden(Error):
    pass

class ItemForbidden(Error):
    pass

class ItemRequired(Error):
    pass

class NoInstantNodes(Error):
    pass

class InvalidConfigurationOption(Error):
    msg = 'Invalid configuration option'

class InvalidConfigurationValue(Error):
    msg = 'Bad configuration value'

class NodeNotPersistent(Error):
    pass

class NoRootNode(Error):
    pass