Hi wizards,

I've made a new MorphProperties class to replace the 
IdentityDictionaries that were in the otherProperties instvar of 
MorphExtensions.

But I want to be able to write backwards-compatible files; this should 
be pretty easy, as I can convert back and forth between 
MorphProperties and IdentityDictionary objects.

So I overrode MorphExtension>>storeDataOn: to store an 
IdentityDictionary instead of the MorphProperties:

MorphExtension>>
storeDataOn: aDataStream
	"Store my properties as an IdentityDictionary for backwards 
compatibility"
	| oldProps |
	oldProps _ otherProperties.
	otherProperties _ otherProperties ifNotNil: [ IdentityDictionary 
newFrom: otherProperties ].
	[ super storeDataOn: aDataStream ] ensure: [ otherProperties _ 
oldProps ]


And then to read MorphExtensions back in, I have this:

readDataFrom: aDataStream size: varsOnDisk
	"Fill in the fields of self based on the contents of aDataStream.  
Return self.
	 Read in the instance-variables written by Object>>storeDataOn:."
	super readDataFrom: aDataStream size: varsOnDisk.
	otherProperties _ MorphProperties convertedFrom: otherProperties.


Problem is, when I store a project it still stores MorphProperties 
obejcts (which don't load into older images).


What do I need to do to make sure that the MorphExtensions are always 
stored with IdentityDictionaries?

Thanks,
-- 
Ned Konz
http://bike-nomad.com
GPG key ID: BEEA7EFE