da19359626
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@3344 fd906abe-77d9-0310-91a1-e0d9ade77398
66 lines
2.3 KiB
Python
66 lines
2.3 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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Base implementation for import adapters.
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$Id$
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"""
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import csv
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from zope import component
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from zope.interface import implements
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from zope.cachedescriptors.property import Lazy
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from cybertools.external.base import BaseReader
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from cybertools.external.element import Element
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class CsvReader(BaseReader):
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elementFactories = {None: Element}
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fieldNames = ()
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start = stop = None
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def read(self, input):
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result = []
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reader = csv.DictReader(input, self.fieldNames)
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lastIdentifiers = {}
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for idx, row in enumerate(list(reader)[self.start:self.stop]):
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currentElements = {}
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for k, v in row.items():
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if k is None:
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continue
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type = None
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if '.' in k:
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type, k = k.split('.', 1)
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element = currentElements.get(type)
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if element is None:
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ef = self.elementFactories.get(type)
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if ef is None:
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raise ValueError('Missing element factory for %r.' % type)
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element = currentElements[type] = ef()
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element.type = type
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element[k] = v # ?TODO: unmarshall
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for element in sorted(currentElements.values(), key=lambda x: x.order):
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id = element.identifier
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if not id or id != lastIdentifiers.get(element.type):
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element.setParent(currentElements)
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result.append(element)
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lastIdentifiers[element.type] = id
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return result
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