Removed `OFS.DefaultObservable` - an early predecessor of `zope.event`.

doc/CHANGES.rst

@@ -44,6 +44,8 @@ Features Added
 Restructuring
 +++++++++++++
 
+- Removed `OFS.DefaultObservable` - an early predecessor of `zope.event`.
+
 - Removed `mime-types` option from `zope.conf`. You can use the `add_files`
   API from `zope.contenttype` instead.
 

src/OFS/DefaultObservable.py

-##############################################################################
-#
-# Copyright (c) 2002 Zope Foundation and Contributors.
-#
-# This software is subject to the provisions of the Zope Public License,
-# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
-# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
-# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
-# FOR A PARTICULAR PURPOSE
-#
-##############################################################################
-"""Implement Observable interface (see
-http://www.zope.org/Members/michel/Projects/Interfaces/ObserverAndNotification)
-This class is intended to be used as a mixin (note that it doesn't
-derive from any Zope persistence classes, for instance).
-"""
-
-from types import StringType
-
-class DefaultObservable:
-    """
-    See the Interfaces wiki for design notes:
-
-http://www.zope.org/Members/michel/Projects/Interfaces/ObserverAndNotification
-
-    DefaultObservable is intended to be used as a mix-in, like so::
-
-        from OFS.SimpleItem import SimpleItem
-        from OFS.DefaultObservable import DefaultObservable
-
-        class Foo( SimpleItem, DefaultObservable ):
-            '''
-                Some foo or other
-            '''
-            ...
-            def bar( self, ... ):
-                '''
-                '''
-                ...
-                self.notify( "bar" )
-
-    Clients register with a Foo instance using the methods of the
-    Observable interface, e.g.::
-
-        foo.registerObserver( self.getPhysicalPath() + ( 'watchFoo',) )
-
-    When the Foo instance has its 'bar()' method called, it will
-    notify all registered observers, passing 'bar' as the event;  in
-    this case, the client's 'watchFoo()' method will be called, with
-    the foo object and 'bar' passed as parameters.
-    """
-
-    def __init__( self, debug=0 ):
-        self._observers = []
-        self._debug = debug
-
-    def _normalize( self, observer ):
-
-        # Assert that observer is a string or a sequence of strings.
-        if type( observer ) != StringType:
-            observer = '/'.join( observer)
-
-        return observer
-
-    #
-    #   Observable interface methods.
-    #
-    def registerObserver( self, observer ):
-
-        normal = self._normalize( observer )
-        if self.restrictedTraverse( normal, None ):
-            self._observers.append( normal )
-        else:
-            raise NameError, observer
-
-    def unregisterObserver( self, observer ):
-
-        self._observers.remove( self._normalize( observer ) )
-
-    #
-    #   Convenience method for derivatives.
-    #
-    def notify( self, event=None ):
-
-        bozos = []
-
-        for observer in self._observers:
-
-            obj = self.restrictedTraverse( observer, None )
-
-            if obj is not None:
-                try:
-                    obj( self, event )
-                except:
-                    bozos.append( observer ) # Veto not allowed!
-                    if self._debug:
-                        import traceback
-                        traceback.print_exc()
-            else:
-                bozos.append( observer )
-
-        for bozo in bozos:
-            try: # avoid race condition if unregister() called before now
-                self._observers.remove( bozo )
-            except:
-                pass