Module EaseXML.classregistry

classresolver.py

2 February 2004, Ian Bicking <ianb@colorstudy.com>

Resolves strings to classes, and runs callbacks when referenced classes are created.

Classes are referred to only by name, not by module. So that identically-named classes can coexist, classes are put into individual registries, which are keyed on strings (names). These registries are created on demand.

Use like:

>>> import classregistry
>>> registry = classregistry.registry('MyModules')
>>> def afterMyClassExists(cls):
...    print 'Class finally exists:', cls
>>> registry.addClassCallback('MyClass', afterMyClassExists)
>>> class MyClass:
...    pass
>>> registry.addClass(MyClass)
Class finally exists: MyClass