Ensures that the password follows the following criteria:

        :param value: <str>

        :return: True

def validate(self, value):
        """
        Ensures that the password follows the following criteria:

        :param value: <str>

        :return: True
        """
        if not isinstance(value, (str, unicode)):
            raise orb.errors.ColumnValidationError(self, 'Invalid password.')

        elif not self.__allowUnicode and value != projex.text.toAscii(value):
            raise orb.errors.ColumnValidationError(self, 'Only ASCII characters are allowed for your password.')

        elif len(value) < self.__minlength or \
                (self.__requireUppercase and not re.search('[A-Z]', value)) or \
                (self.__requireLowercase and not re.search('[a-z]', value)) or \
                (self.__requireNumber and not re.search('[0-9]', value)) or \
                (self.__requireWildcard and not re.search('[^a-zA-Z0-9]', value)):
            raise orb.errors.ColumnValidationError(self, self.rules())

        # check for invalid characters
        elif self.__invalidCharacters and re.search(self.__invalidCharacters, value):
            raise orb.errors.ColumnValidationError(self, self.__invalidCharactersRule)

        else:
            return super(PasswordColumn, self).validate(value)