1) Make all decorators implement serializable, but some will fail at runtime if you decorate a non-serializable instance.
2) Implement serializable subclasses of each decorator, and use the factory method to create either the serializable or non-serializable subclass as required.
#1 is easy, #2 will take much longer. Any views? #1 is the default choice.
I like #1 also. It just seems easier.
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