from zope.interface import Interface, Attribute

class ParserError(Exception):
    pass

class MyInterface(Interface):
    def setDict(self, attr, key, value):
	dict=self.get(attr)
	dict[key]=value
	try:
	    self.set(attr,dict)
	except:
	    self.setTaggedValue(attr,dict)

class ParserPlugin(MyInterface):
    """ A python interface to a parser of some sort """
    running = Attribute(""" The enabled state of the parser """)
    displayName = Attribute(""" The name of the tokenizer """)
    preferences = Attribute(""" A dictionary of config values and their types """)
    values = Attribute(""" A dictionary of config attributes and their values """)
    def start(self):
        for p in self.preferences:
            p=Attribute(""" I have no value. """)
	""" Start the tokenizer """
    def stop(self):
	""" Stop the tokenizer """
    def parse(self, tokenList):
	""" Parse a list of tokens """
    def version(self):
	""" Return the version string of the tokenizer """
    def preferences(self):
	""" Return a list of config values to store """