Viewing file:  ParsedAbbreviatedRelativeLocationPath.py (2.83 KB) -rw-r--r--
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# $Header: /var/local/cvsroot/4Suite/Ft/Xml/XPath/ParsedAbbreviatedRelativeLocationPath.py,v 1.7 2005/03/20 10:17:15 jkloth Exp $
"""
A parsed token that represents a abbreviated relative location path.
Copyright 2005 Fourthought, Inc. (USA).
Detailed license and copyright information: http://4suite.org/COPYRIGHT
Project home, documentation, distributions: http://4suite.org/
"""
from xml.dom import Node
from Ft.Lib.Set import Unique
from Ft.Xml.XPath import Types
class ParsedAbbreviatedRelativeLocationPath:
def __init__(self, left, right):
"""
left can be a step or a relative location path
right is only a step
"""
self._left = left
self._right = right
return
def _descendants(self, context, nodeset):
for child in context.node.childNodes:
context.node = child
results = self._right.select(context)
if not isinstance(results, Types.NodesetType):
raise TypeError("%r must be a node-set, not a %s" % (
self._right,
Types.g_xpathPrimitiveTypes.get(type(results),
type(results).__name__)))
if results:
nodeset.extend(results)
if child.nodeType == Node.ELEMENT_NODE:
nodeset = self._descendants(context, nodeset)
return nodeset
def evaluate(self, context):
"""Returns a node-set"""
left = self._left.select(context)
if not isinstance(left, Types.NodesetType):
raise TypeError("%r must be a node-set, not a %s" % (
self._left,
Types.g_xpathPrimitiveTypes.get(type(left),
type(left).__name__)))
state = context.copy()
results = []
for node in left:
context.node = node
nodeset = self._right.select(context)
if not isinstance(nodeset, Types.NodesetType):
raise TypeError("%r must be a node-set, not a %s" % (
self._right,
Types.g_xpathPrimitiveTypes.get(type(nodeset),
type(nodeset).__name__)))
results.extend(self._descendants(context, nodeset))
results = Unique(results)
context.set(state)
return results
select = evaluate
def pprint(self, indent=''):
print indent + str(self)
self._left.pprint(indent + ' ')
self._right.pprint(indent + ' ')
def __str__(self):
return '<AbbreviatedRelativeLocationPath at %x: %s>' % (
id(self),
repr(self),
)
def __repr__(self):
return repr(self._left) + '//' + repr(self._right)
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