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########################################################################
#
# File Name: ForEachElement.py
#
#
"""
Implementation of the XSLT Spec for-each stylesheet element.
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
"""
from xml.dom import EMPTY_NAMESPACE
import xml.dom.Element
import xml.dom.ext
import xml.xslt
from xml.xslt import XsltElement, XsltException, Error, XSL_NAMESPACE
from xml.xpath import XPathParser
class ForEachElement(XsltElement):
legalAttrs = ('select',)
def __init__(self, doc, uri=xml.xslt.XSL_NAMESPACE, localName='for-each',
prefix='xsl', baseUri=''):
XsltElement.__init__(self, doc, uri, localName, prefix, baseUri)
def setup(self):
self.__dict__['_select'] = self.getAttributeNS(EMPTY_NAMESPACE, 'select')
self.__dict__['_nss'] = xml.dom.ext.GetAllNs(self)
if self._select:
parser = XPathParser.XPathParser()
self.__dict__['_expr'] = parser.parseExpression(self._select)
else:
self.__dict__['_expr'] = None
self.__dict__['_sortSpecs'] = []
for child in self.childNodes:
if (child.namespaceURI, child.localName) == (XSL_NAMESPACE, 'sort'):
self._sortSpecs.append(child)
return
def instantiate(self, context, processor):
origState = context.copy()
context.setNamespaces(self._nss)
if self._select:
result = self._expr.evaluate(context)
#Check the result type. Note: we should really normalize the data typing so that we can throw an error if the result is not a node-set
if type(result) != type([]):
raise XsltException(Error.INVALID_FOREACH_SELECT)
else:
result = context.node.childNodes
size = len(result)
if size > 1 and self._sortSpecs:
result = self._sortSpecs[0].instantiate(context, processor, result, self._sortSpecs[1:])[1]
for ctr in range(size):
node = result[ctr]
context.setNodePosSize((node,ctr+1,size))
context.currentNode = node
for child in self.childNodes:
child.instantiate(context, processor)[0]
context.set(origState)
return (context,)
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, self._select, self._sortSpecs, self._expr)
return new_state
def __setstate__(self, state):
XsltElement.__setstate__(self, state[0])
self._nss = state[1]
self._select = state[2]
self._sortSpecs = state[3]
self._expr = state[4]
return
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