Detaching the model from the component

Many Swing components such as a JTextComponent have a separate model for the data. I'm concerned about what happens when that model backs multiple components, for example a single Document that is used by multiple JTextFields. Generally listeners are added to the model to update the component when it changes, but when/where are they removed? I was just looking through JTextComponent/JTextField and don't see any place it's being cleaned up.
So what happens when the model is backing two components, one which is in a containment hierarchy and one which is no longer in a containment hierarchy and has been discarded? Since the references are concrete I don't see how it can be collected. I'm trying to figure out what the convention is regarding this. Do you keep weak references to listeners? Do you simply not use a model to back multiple components? Do you override removeNotify() (or some other method) to remove listeners (and if so, what do you override to add them again if you get added to a containment hierarchy again)?
Any advice is appreciated.
waits for camickr

The only think I can suggest is to try
textComponent.setModel( null ). Before adding
DocumentLIsteners to the new model it removes the
DocumentListeners from the old model.I'm not so much concerned with swapping models as I am what happens when I have one model backing multiple components. Say I have some data that for the purposes of the GUI is backed by a Document. If I want to display that data, which might even be something that can be mutated by the user, then I use that Document. In the case of a JTextComponent it already uses a Document for it's model so you simply set the model to be your own Document. Now every JTextComponent displays the right data and can update the correct data.
The problem is what happens when some part of the GUI is discarded and it contains a component that is backed by this model? Either the entire thing being discarded needs to be self-contained and not attached to anything you're holding on to (or vice versa), or it needs to have some mechanism to detach it. How does Swing do it? I've been thinking there must be something to deal with this, something fired when it's removed from a containment hierarchy. For example, why in the world would a JTextComponent that's not even in a containment hierarchy keep updating itself when the model changes?
I found removeNotify() but from it's documentation I'm not sure if it's appropriate and JTextComponent doesn't seem to remove listeners anywhere unless you change the model. I'm quite perplexed as to how (or perhaps when) the actual visual component gets detached from whatever it needs to function when it's no longer being displayed (e.g. I removed it from the frame and no longer have a reference to it).

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