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""" Implements a warning handler base class and a simple handler that simply
outputs warnings to stderr. """
import _singleton
# Constants
STDERR = 1
MAILER = 2
from sys import stderr
class Warning_Handler (_singleton.Singleton):
def __init__(self, handlertype=STDERR):
""" Constructor. Type should be either STDERR or MAILER.
There are probably better ways to do this, but it is implemented
this way because I only wanted to have a dependancy on ldap if someone
actually wanted to use the mailer. """
super (Warning_Handler, self).__init__ ()
self.messages = ""
self.add_warning = self.default_add_warning
self.close = self.default_close
self.open = self.default_open
if handlertype is STDERR:
self.add_warning = self.stderr_add_warning
elif handlertype is MAILER:
from _mailer import Mailer
self.handler = Mailer ()
self.add_warning = self.handler.add_warning
self.open = self.handler.open
self.close = self.handler.close
self.get_messages = self.handler.get_messages
else:
self.add_warning = self.stderr_add_warning
def default_add_warning (self, warning_text):
pass
def default_open (self, arg = ""):
pass
def default_close (self, arg = ""):
pass
def get_messages (self):
return self.messages
def stderr_add_warning (self, warning_text):
stderr.write (warning_text)
return
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