protected void initialize() {
super.initialize();
this.components = new IdentityHashMap();
this.collections = new IdentityHashMap();
this.componentListener = this.buildComponentListener();
this.size = 0;
}
/** @see CollectionValueModelWrapper#engageModel() */
protected void engageModel() {
super.engageModel();
// synch our cache *after* we start listening to the wrapped collection,
// since its value might change when a listener is added;
// the following will trigger the firing of a number of unnecessary events
// (since we don't have any listeners yet),
// but it reduces the amount of duplicate code
this.addComponentSources((Iterator) this.collectionHolder.getValue());
}
/** @see CollectionValueModelWrapper#disengageModel() */
protected void disengageModel() {
super.disengageModel();
// stop listening to the components...
for (Iterator stream = this.components.values().iterator(); stream.hasNext(); ) {
((CollectionValueModel) stream.next())
.removeCollectionChangeListener(ValueModel.VALUE, this.componentListener);
}
// ...and clear the cache
this.components.clear();
this.collections.clear();
this.size = 0;
}