When the getPropertyValue(Item, pValue) method gets called for a user-defined property descriptor, it is given the currently cached value in the variable pValue. If you have previously stored a value for this property in the cache, it is given to you here. Your implementation may just choose to return that value.
Two different representations of a null value can be returned:
pValue = nullindicates there is no value in the cache for this property.pValue = RepositoryItemImpl.NULL_OBJECTindicates that an explicit null value was already cached for this item.
