def evaluate(self, context):
"""Evaluate the left, then if op =// the parsedStep, then the right, push context each time"""
"""Returns a node set"""
rt = self._left.evaluate(context)
if type(rt) != type([]):
raise "Invalid Expression for a PathExpr %s" % str(self._left)
origState = context.copyNodePosSize()
if self._step:
res = []
l = len(rt)
for ctr in range(l):
r = rt[ctr]
context.setNodePosSize((r,ctr+1,l))
subRt = self._step.select(context)
res = Set.Union(res,subRt)
rt = res
res = []
l = len(rt)
for ctr in range(l):
r = rt[ctr]
context.setNodePosSize((r,ctr+1,l))
subRt = self._right.select(context)
if type(subRt) != type([]):
raise Exception("Right Expression does not evaluate to a Node Set")
res = Set.Union(res,subRt)
context.setNodePosSize(origState)
return res
def evaluate(self, context):
lSet = self._left.evaluate(context)
if type(lSet) != type([]):
raise "Left Expression does not evaluate to a node set"
rSet = self._right.evaluate(context)
if type(rSet) != type([]):
raise "Right Expression does not evaluate to a node set"
set = Set.Union(lSet, rSet)
set = Util.SortDocOrder(set)
return set
def evaluate(self, context):
res = []
rt = self._left.select(context)
l = len(rt)
origState = context.copyNodePosSize()
for ctr in range(l):
context.setNodePosSize((rt[ctr], ctr + 1, l))
subRt = self._middle.select(context)
res = Set.Union(res, subRt)
rt = res
res = []
l = len(rt)
for ctr in range(l):
context.setNodePosSize((rt[ctr], ctr + 1, l))
subRt = self._right.select(context)
res = Set.Union(res, subRt)
context.setNodePosSize(origState)
return res