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##############################################################################
#
# Copyright (c) 2002 Zope Corporation and Contributors. All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (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
#
##############################################################################
"""Provide an apply-like facility that works with any mapping object
"""
def mapply(object,
positional=(),
keyword={},
maybe=True,
):
if hasattr(object,'__bases__'): # the object is a class
raise TypeError('Cannot publish class %s' % object)
f = object
im = False
if hasattr(f, 'im_func'):
im = True
elif not hasattr(f, 'func_defaults'):
if hasattr(f, '__call__'):
f = f.__call__
if hasattr(f, 'im_func'):
im = True
elif not hasattr(f, 'func_defaults') and maybe:
return object
elif maybe:
return object
if im:
f = f.im_func
c = f.func_code
defaults = f.func_defaults
names = c.co_varnames[1:c.co_argcount]
else:
defaults = f.func_defaults
c = f.func_code
names = c.co_varnames[:c.co_argcount]
nargs = len(names)
if positional:
positional = list(positional)
if len(positional) > nargs:
raise TypeError('too many arguments')
args = positional
else:
args = []
get = keyword.get
nrequired = len(names) - (len(defaults or ()))
for index in range(len(args), len(names)):
name = names[index]
v = get(name, args)
if v is args:
if index < nrequired:
raise TypeError('Argument %s was omitted' % name)
else:
v = defaults[index-nrequired]
args.append(v)
args = tuple(args)
return object(*args)
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