Class CanopyCache

Package: Udanax-Gold
All Superclasses: Object Heaper
Protocols: Object
Categories: Xanadu-Be-Canopy

Class Methods

Clear the cache because the canopy has
changed. This ought to destroy the cachedPath.
This must be cleared after every episode!!!

Overrides: Heaper

Return the set of all crums from canopyCrum
(inclusive) to the top of canopyCrum's canopy.

Return the crum at the top of canopyCrum's canopy.

If the cache contains childCrum it must be made
to contain childCrum's new parent: parentCrum.
Also update CachedRoot.

If the cache contains canopyCrum, it must be updated
because canopyCrum has new parents. For now, just
invalidate the cache.