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# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in LICENSE.txt and may be redistributed only under
# the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
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class ProviderNotRegisteredError(Exception):
    """ Raised when a provider is requested by ID and not found. """

    def __init__(self, provider_id):
        self.provider_id = provider_id

    def __str__(self):
        msg = "Selection provider with ID '{id}' not found."
        return msg.format(id=self.provider_id)


class IDConflictError(Exception):
    """ Raised when a provider is added and its ID is already registered. """

    def __init__(self, provider_id):
        self.provider_id = provider_id

    def __str__(self):
        msg = "A selection provider with ID '{id}' is already registered."
        return msg.format(id=self.provider_id)


class ListenerNotConnectedError(Exception):
    """ Raised when a listener that was never connected is disconnected. """

    def __init__(self, provider_id, listener):
        self.provider_id = provider_id
        self.listener = listener

    def __str__(self):
        msg = "Selection listener {lr} is not connected to provider '{id}'."
        return msg.format(lr=self.listener, id=self.provider_id)