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########################################################################
#
# File Name: ChooseElement.py
#
#
"""
Implementation of the XSLT Spec choose instruction
WWW: http://4suite.com/4XSLT e-mail: support@4suite.com
Copyright (c) 1999-2000 FourThought Inc, USA. All Rights Reserved.
See http://4suite.com/COPYRIGHT for license and copyright information
"""
import xml.dom.ext
from xml.xslt import XSL_NAMESPACE
from xml.xslt import XsltElement, XsltException, Error
from xml.xslt.WhenElement import WhenElement
from xml.xslt.OtherwiseElement import OtherwiseElement
from xml.xpath import CoreFunctions
from xml.dom import Node
class ChooseElement(XsltElement):
legalAttrs = ()
def __init__(self, doc, uri=XSL_NAMESPACE, localName='choose',
prefix='xsl', baseUri=''):
XsltElement.__init__(self, doc, uri, localName, prefix, baseUri)
def setup(self):
self.__dict__['_nss'] = xml.dom.ext.GetAllNs(self)
when_other_allowed = 1
when_found = 0
for child in self.childNodes:
if child.nodeType == Node.ELEMENT_NODE:
if child.namespaceURI == XSL_NAMESPACE:
if child.localName == 'when':
when_found = 1
if not when_other_allowed:
raise XsltException(Error.CHOOSE_WHEN_AFTER_OTHERWISE)
elif child.localName == 'otherwise':
if when_other_allowed:
when_other_allowed = 0
else:
raise XsltException(Error.CHOOSE_MULTIPLE_OTHERWISE)
else:
raise XsltException(Error.ILLEGAL_CHOOSE_CHILD)
else:
raise XsltException(Error.ILLEGAL_CHOOSE_CHILD)
if not when_found:
raise XsltException(Error.CHOOSE_REQUIRES_WHEN_CHILD)
return
def instantiate(self, context, processor, new_level=1):
origState = context.copy()
context.setNamespaces(self._nss)
rec_tpl_params = None
for child in self.childNodes:
context, chosen, rec_tpl_params = child.instantiate(context, processor, new_level)
if chosen: break
context.set(origState)
return (context, rec_tpl_params)
def __getinitargs__(self):
return (None, self.namespaceURI, self.localName, self.prefix,
self.baseUri)
def __getstate__(self):
base_state = XsltElement.__getstate__(self)
new_state = (base_state, self._nss, )
return new_state
def __setstate__(self, state):
XsltElement.__setstate__(self, state[0])
self._nss = state[1]
return
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