a9cf186875
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@3574 fd906abe-77d9-0310-91a1-e0d9ade77398
91 lines
2.7 KiB
Python
91 lines
2.7 KiB
Python
#
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# Copyright (c) 2009 Helmut Merz helmutm@cy55.de
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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,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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Basic implementations for configuration options
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$Id$
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"""
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import os
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from zope.interface import implements
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from cybertools.meta.element import Element
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from cybertools.meta.interfaces import IOptions, IConfigurator
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from cybertools.meta.namespace import AutoNamespace, Executor, ExecutionError
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class Options(AutoNamespace):
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implements(IOptions)
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def __call__(self, key, default=None):
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value = self
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for part in key.split('.'):
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value = getattr(value, part, None)
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if isinstance(value, Element):
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value = default
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return value
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class GlobalOptions(Options):
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_filename = None
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_lastChange = None
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def __call__(self, key, default=None):
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if self._filename is not None:
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fn = self._filename
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if os.path.exists(fn):
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modified = os.path.getmtime(fn)
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if self._lastChange is None or self._lastChange < modified:
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Configurator(self).load(file=fn)
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self._lastChange = modified
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return super(GlobalOptions, self).__call__(key, default)
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class Configurator(object):
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implements(IConfigurator)
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def __init__(self, context):
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self.context = context
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def load(self, text=None, file=None):
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if file is not None:
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if hasattr(file, 'read'):
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text = file.read()
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else: # must be a file name
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f = open(file, 'r')
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text = f.read()
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f.close()
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result = Executor(self.context).execute(text)
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if result:
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raise ExecutionError('\n' + result)
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def dump(self, file=None):
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text = str(options)
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if file is not None:
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if hasattr(file, 'write'):
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file.write(text)
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else: # must be a file name
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f = open(file, 'w')
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f.write(text)
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f.close()
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return text
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