An annotation map is a map specialized for the requirements of an annotation model. The annotation map supports a customizable lock object which is used to synchronize concurrent operations on the map (see ISynchronizable . The map supports two iterator methods, one for the values and one for the keys of the map. The returned iterators are robust, i.e. they work on a copy of the values and keys set that is made at the point in time the iterator methods are called.

The returned collections of the methods values, entrySet, and keySet are not synchronized on the annotation map's lock object.