Source code for surf.exceptions

# Copyright (c) 2009, Digital Enterprise Research Institute (DERI),
# NUI Galway
# All rights reserved.

# author: Cosmin Basca
# email: cosmin.basca@gmail.com

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#      notice, this list of conditions and the following disclaimer.
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#      names of its contributors may be used to endorse or promote
#      products derived from this software without specific prior
#      written permission.

# THIS SOFTWARE IS PROVIDED BY DERI ''AS IS'' AND ANY
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# -*- coding: utf-8 -*-
""" Module for SuRF exceptions. """

__author__ = ['Peteris Caune', 'Cosmin Basca']

# -----------------------------------------------------------------------------
#
# SuRF exceptions
#
# -----------------------------------------------------------------------------
class CardinalityException(Exception):
    """ Raised when list length != 1.   
    
    Subclasses of this exception are raised by 
    :meth:`surf.resource.result_proxy.ResultProxy.one()` and 
    :meth:`surf.resource.value.ResultValue.get_one()`. 
    
    """

    pass

class NoResultFound(CardinalityException):
    """ Raised when list length == 0. 

    This exception is raised by 
    :meth:`surf.resource.result_proxy.ResultProxy.one()` and 
    :meth:`surf.resource.value.ResultValue.get_one()`. 
    
    """

    pass

class MultipleResultsFound(CardinalityException):
    """ Raised when list length > 1.  
 
    This exception is raised by 
    :meth:`surf.resource.result_proxy.ResultProxy.one()` and 
    :meth:`surf.resource.value.ResultValue.get_one()`. 

    """

    pass


class PluginNotFoundException(Exception):
    """ Raised when the required Plugin is not found

    """
    pass