Jan Dittberner
1d288681b7
work on documentation * documentation updates (addresses #13) * make stmtcreator execute as __main__ only git-svn-id: file:///home/www/usr01/svn/gnuviechadmin/trunk@254 a67ec6bc-e5d5-0310-a910-815c51eb3124
89 lines
3 KiB
Python
89 lines
3 KiB
Python
# -*- python -*-
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# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2007, 2008 by Jan Dittberner.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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# USA.
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#
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# Version: $Id$
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"""This file defines the gnuviechadmin specific exception types."""
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class GnuviechadminError(Exception):
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"""This is the base class for domain specific exceptions of
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Gnuviechadmin."""
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pass
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class MissingFieldsError(GnuviechadminError):
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"""This exception should be raised when a required field of a data
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class is missing."""
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def __init__(self, missingfields):
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self.missing = missingfields
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def __str__(self):
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return "the fields %s are missing." % (repr(self.missing))
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class CreationFailedError(GnuviechadminError):
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"""This exception should be raised if a business object could not
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be created."""
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def __init__(self, classname, cause = None):
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self.classname = classname
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self.cause = cause
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def __str__(self):
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msg = "Creating an instance of class %s failed." % (self.classname)
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if self.cause:
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msg += " The reason is %s." % (str(self.cause))
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return msg
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class DeleteFailedError(GnuviechadminError):
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"""This exception should be raise if a business object coild not
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be deleted."""
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def __init__(self, classname, cause = None):
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self.classname = classname
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self.cause = cause
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def __str__(self):
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msg = "Deleting an instance of class %s failed." % (self.classname)
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if self.cause:
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msg += " The reason is %s." % (str(self.cause))
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return msg
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class ValidationFailedError(GnuviechadminError):
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"""This exception should be raised if the validation of a business
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object failed."""
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def __init__(self, instance, cause = None):
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self.instance = instance
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self.cause = cause
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def __str__(self):
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msg = "Validating %s failed." % (str(self.instance))
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if self.cause:
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msg += " The reason is %s." % (str(self.cause))
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return msg
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class CannotDeleteError(GnuviechadminError):
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"""This exception should be raised if an entity cannot be deleted
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because of some unmatched precondition."""
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def __init__(self, instance, cause = None):
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self.instance = instance
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self.cause = cause
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def __str__(self):
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msg = "Cannot delete %s." % (str(self.instance))
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if self.cause:
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msg += " The reason is %s." % (str(self.cause))
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return msg
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