76e6742b25
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@2442 fd906abe-77d9-0310-91a1-e0d9ade77398
138 lines
3.1 KiB
Python
138 lines
3.1 KiB
Python
#
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# Copyright (c) 2008 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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Base implementation for accessing external content objects.
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$Id$
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"""
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from zope.app.container.contained import Contained
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from zope.cachedescriptors.property import Lazy
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from zope import component
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from zope.interface import implements
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from cybertools.integrator.interfaces import IContainerFactory, IFileFactory
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from cybertools.integrator.interfaces import IReadContainer, IFile, IImage
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# proxy base (sample) classes
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class ReadContainer(Contained):
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implements(IReadContainer)
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factoryName = 'sample'
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__parent__ = None
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def __init__(self, address, **kw):
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self.address = address
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for k, v in kw.items():
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setattr(self, k, v)
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@Lazy
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def fileFactory(self):
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return component.getUtility(IFileFactory, name=self.factoryName)
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@Lazy
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def containerFactory(self):
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return component.getUtility(IContainerFactory, name=self.factoryName)
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def keys(self):
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return [k for k, v in self.items()]
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def __iter__(self):
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return iter(self.keys())
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def __getitem__(self, key):
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if key in self:
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return self.get(key)
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raise KeyError(key)
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def get(self, key, default=None):
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return default
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def values(self):
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return [v for k, v in self.items()]
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def __len__(self):
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return len(self.keys())
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def items(self):
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return []
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def __contains__(self, key):
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return key in self.keys()
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has_key = __contains__
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class File(object):
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implements(IFile)
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contentType = None
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data = None
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__parent__ = None
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def __init__(self, address, contentType, **kw):
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self.address = address
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self.contentType = contentType
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for k, v in kw.items():
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setattr(self, k, v)
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def getData(self, num=None):
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return ''
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data = property(getData)
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def getSize(self):
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return len(self.data)
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def Image(File):
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implements(IImage)
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def getImageSize(self):
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return 0, 0
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# factory base (sample) classes
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class Factory(object):
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proxyClass = ReadContainer
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def __call__(self, address, **kw):
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return self.proxyClass(address, **kw)
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class ContainerFactory(Factory):
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implements(IContainerFactory)
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proxyClass = ReadContainer
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class FileFactory(Factory):
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implements(IFileFactory)
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proxyClass = File # real implementations should also care about images
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