import re
true = 1
false = 0
class StringValidator:
RE_ALPHA = None
RE_ALPHANUMERIC = None
RE_NUMERIC = None
RE_EMAIL = None
validateString = ""
_patterns = {}
def __init__(self, validateString):
self.validateString = validateString
def isAlpha(self):
if not self.__class__.RE_ALPHA:
self.__class__.RE_ALPHA = re.compile("^\D+$")
return self.checkStringAgainstRe(self.__class__.RE_ALPHA)
def isAlphaNumeric(self):
if not self.__class__.RE_ALPHANUMERIC:
self.__class__.RE_ALPHANUMERIC = re.compile("^[a-zA-Z0-9]+$")
return self.checkStringAgainstRe(self.__class__.RE_ALPHANUMERIC)
def isNumeric(self):
if not self.__class__.RE_NUMERIC:
self.__class__.RE_NUMERIC = re.compile("^\d+$")
return self.checkStringAgainstRe(self.__class__.RE_NUMERIC)
def isEmail(self):
if not self.__class__.RE_EMAIL:
self.__class__.RE_EMAIL = re.compile("^.+@.+\..{2,3}$")
return self.checkStringAgainstRe(self.__class__.RE_EMAIL)
def isEmpty(self):
return self.validateString == ""
def definePattern(self, re_name, re_pat):
self._patterns[re_name] = re_pat
def isValidForPattern(self, re_name):
if self._patterns.has_key(re_name):
if type(self._patterns[re_name]) == type(''):
self._patterns[re_name] = re.compile(self._patterns[re_name])
return self.checkStringAgainstRe(self._patterns[re_name])
else:
raise KeyError, "No pattern name '%s' stored."
# this method should be considered to be private (not be be used via interface)
def checkStringAgainstRe(self, regexObject):
if regexObject.search(self.validateString) == None:
return false
return true
# example usage
sv1 = StringValidator("joe@testmail.com")
sv2 = StringValidator("rw__343")
if sv1.isEmail(): print sv1.validateString + " is a valid e-mail address"
else: print sv1.validateString + " is not a valid e-mail address"
if sv2.isAlphaNumeric(): print sv2.validateString + " is a valid alpha-numeric string"
else: print sv2.validateString + "i is not a valid alpha-numeric string"
# note, this is basically the same as the e-mail checker, just it shows
# how to do a custom re
sv2.definePattern("custom_email", "^.+@.+\..{2,3}$")
if sv1.isValidForPattern("custom_email"): print sv1.validateString + " is a valid e-mail address"
else: print sv1.validateString + " is a invalid e-mail address"
