Viewing file:  XPathParserBase.py (2.86 KB) -rw-r--r--
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try:
import os, gettext
locale_dir = os.path.split(__file__)[0]
gettext.install('4Suite', locale_dir)
except (ImportError,AttributeError,IOError):
def _(msg):
return msg
SYNTAX_ERR_MSG = _("Error parsing expression:\n'%s'\nSyntax error at or near '%s' Line: %d")
INTERNAL_ERR_MSG = _("Error parsing expression:\n'%s'\nInternal error in processing at or near '%s', Line: %d, Exception: %s")
class SyntaxException(Exception):
def __init__(self, source, lineNum, location):
Exception.__init__(self, SYNTAX_ERR_MSG%(source, location, lineNum))
self.source = source
self.lineNum = lineNum
self.loc = location
class InternalException(Exception):
def __init__(self, source, lineNum, location, exc, val, tb):
Exception.__init__(self, INTERNAL_ERR_MSG%(source, location, lineNum, exc))
self.source = source
self.lineNum = lineNum
self.loc = location
self.errorType = exc
self.errorValue = val
self.errorTraceback = tb
class XPathParserBase:
def __init__(self):
self.initialize()
def initialize(self):
self.results = None
self.__stack = []
XPath.cvar.g_errorOccured = 0
def parse(self,st):
g_parseLock.acquire()
try:
self.initialize()
XPath.my_XPathparse(self,st)
if XPath.cvar.g_errorOccured == 1:
raise SyntaxException(
st,
XPath.cvar.lineNum,
XPath.cvar.g_errorLocation)
if XPath.cvar.g_errorOccured == 2:
raise InternalException(
st,
XPath.cvar.lineNum,
XPath.cvar.g_errorLocation,
XPath.cvar.g_errorType,
XPath.cvar.g_errorValue,
XPath.cvar.g_errorTraceback)
return self.__stack
finally:
g_parseLock.release()
def pop(self):
if len(self.__stack):
rt = self.__stack[-1]
del self.__stack[-1]
return rt
self.raiseException("Pop with 0 stack length")
def push(self,item):
self.__stack.append(item)
def empty(self):
return len(self.__stack) == 0
def size(self):
return len(self.__stack)
def raiseException(self, message):
raise Exception(message)
### Callback methods ###
def PrintSyntaxException(e):
print "********** Syntax Exception **********"
print "Exception at or near '%s'" % e.loc
print " Line: %d" % (e.lineNum)
def PrintInternalException(e):
print "********** Internal Exception **********"
print "Exception at or near '%s'" % e.loc
print " Line: %d" % (e.lineNum)
print " Exception: %s" % e.errorType
print "Original traceback:"
import traceback
traceback.print_tb(e.errorTraceback)
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