b380b0fcd7
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@1603 fd906abe-77d9-0310-91a1-e0d9ade77398
58 lines
2 KiB
Python
58 lines
2 KiB
Python
#
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# Copyright (c) 2006 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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interface definitions for text transformations.
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$Id$
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"""
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from zope.interface import Interface
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class ITextTransform(Interface):
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def __call__(fr):
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""" Transform the content of file fr (readfile) to plain text and
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return the result as unicode.
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"""
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class IFileTransform(ITextTransform):
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""" A transformation that is performed by calling some external program
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and that typically uses an intermediate disk file.
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"""
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def extract(dirname, filename):
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""" Extract text contents from the file specified by ``filename``,
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using some external programm, and return the result as unicode.
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``dirname`` is the path to a temporary directory that
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usually (but not necessarily) contains the file and may
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be used for creating other (temporary) files if needed.
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"""
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def execute(command):
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""" Execute a system command and return the output of the program
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called.
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"""
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def checkAvailable(progname, logMessage=''):
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""" Check the availability of the program named ``progname``.
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Return True if available; if ``logMessage`` is given, put this
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as a warning message into the log if the program is not available.
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"""
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