import rng
"""
The contents of this file are subject to the Mozilla Public License
Version 1.1 (the "License"); you may not use this file except in
compliance with the License.
You may obtain a copy of the License at http://www.mozilla.org/MPL/
Software distributed under the License is distributed on an "AS IS"
basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
License for the specific language governing rights and limitations under
the License.
The Original Code is available at
http://downloads.xmlschemata.org/python/xvif/
The Initial Developer of the Original Code is Eric van der Vlist. Portions
created by Eric van der Vlist are Copyright (C) 2002. All Rights Reserved.
Contributor(s):
"""
def validate(self, node):
#print "validate(%s, %s)" % (self, node.nodeType)
if node == None:
return node
if isinstance(node, list):
res = self.applyElt
for token in node:
res = res.deriv(token)
if res == rng.NotAllowed():
return None
else:
res = self.applyElt.deriv(node)
if res == rng.NotAllowed() or not res.nullable():
return None
else:
return node
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