[Zope-Checkins] CVS: Zope3/lib/python/Zope/Publisher - RequestDataProperty.py:1.1.2.1

[Jim Fulton]

Update of /cvs-repository/Zope3/lib/python/Zope/Publisher
In directory cvs.zope.org:/tmp/cvs-serv30818

Added Files:
      Tag: Zope3-publisher-refactor-branch
	RequestDataProperty.py 
Log Message:
Added module to support read-only request properties

=== Added File Zope3/lib/python/Zope/Publisher/RequestDataProperty.py ===
##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
# 
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE
# 
##############################################################################
"""

Revision information:
$Id: RequestDataProperty.py,v 1.1.2.1 2002/03/25 23:26:38 jim Exp $
"""

class RequestDataGetter(object):

    def __init__(self, request):
        self.__get = getattr(request, self._gettrname)

    def __getitem__(self, name):
        return self.__get(name)

    def get(self, name, default=None):
        return self.__get(name, default)

class RequestDataMapper(object):

    def __init__(self, request):
        self.__map = getattr(request, self._mapname)

    def __getitem__(self, name):
        return self.__map[name]

    def get(self, name, default=None):
        return self.__map.get(name, default)

    def keys(self): return self.__map.keys()
    def items(self): return self.__map.items()
    def values(self): return self.__map.values()
    def __len__(self): return len(self.__map)

class RequestDataProperty(object):

    def __init__(self, gettr_class):
        self.__gettr_class = gettr_class

    def __get__(self, request, rclass=None):
        if request is not None:
            return self.__gettr_class(request)

    def __set__(*args):
        raise AttributeError, 'Unassignable attribute'