Mercurial > parpg-core

annotate src/parpg/components/lockable.py @ 66:96af64cf3b81

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Renamed grease to bGrease (Basic Grease) to get rid of conflicts with an already installed grease.
author KarstenBock@gmx.net
date Mon, 05 Sep 2011 15:00:34 +0200
parents 3024ded5ae61
children 0f659c7675f6
rev   line source
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5ac50245e42c Refactored components and began defining basic Entities and Systems.
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1 # This program is free software: you can redistribute it and/or modify
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2 # it under the terms of the GNU General Public License as published by
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3 # the Free Software Foundation, either version 3 of the License, or
5ac50245e42c Refactored components and began defining basic Entities and Systems.
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4 # (at your option) any later version.
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5 #
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6 # This program is distributed in the hope that it will be useful,
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7 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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8 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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9 # GNU General Public License for more details.
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10 #
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11 # You should have received a copy of the GNU General Public License
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12 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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13
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14 from bGrease.component import Component
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16 class Lockable(Component):
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17 """Component that stores the data of a lock"""
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18
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19 def __init__(self):
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20 """Constructor"""
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21 Component.__init__(self, closed=bool, locked=bool)
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22
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23 class LockedError(Exception):
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24
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25 def __str__(self):
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26 return "Is locked"
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27
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28 class OpenError(Exception):
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29
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30 def __str__(self):
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31 return "Is open"
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32
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33 def lock(lock):
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34 if not lock.closed:
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35 raise OpenError
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36 lock.locked = True
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37
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38 def unlock(lock):
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39 lock.locked = False
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40
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41 def open(lock):
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42 if lock.locked:
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43 raise LockedError
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44 lock.closed = False
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45
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46 def close(lock):
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47 lock.closed = True