Google Collections (Guava Libraries): ImmutableSet/List/Map and Filtering

Question

Assume that you want to build a copy of an ImmutableSet/List/Map object but filter out some of the original entries. One way to implem

Answer 1

Look at Guava's Iterators

Specifically filter(Iterator unfiltered, Predicate predicate)

Answer 2

The result of Iterables.filter() is just a view over the data in myObject: the new list is only built by ImmutableList.copyOf() using the filtering iterator provided by the Iterable