Package com.google.common.collect

Class ForwardingNavigableSet<E extends @Nullable Object>

  • All Implemented Interfaces:
    Iterable<E>, Collection<E>, NavigableSet<E>, Set<E>, SortedSet<E>
    Direct Known Subclasses:
    ForwardingNavigableSet.StandardDescendingSet
    @GwtIncompatible
public abstract class ForwardingNavigableSet<E extends @Nullable Object>
extends ForwardingSortedSet<E>
implements NavigableSet<E>
    A navigable set which forwards all its method calls to another navigable set. Subclasses should override one or more methods to modify the behavior of the backing set as desired per the decorator pattern.

    Warning: The methods of ForwardingNavigableSet forward indiscriminately to the methods of the delegate. For example, overriding ForwardingCollection.add(E) alone will not change the behavior of ForwardingCollection.addAll(java.util.Collection<? extends E>), which can lead to unexpected behavior. In this case, you should override addAll as well, either providing your own implementation, or delegating to the provided standardAddAll method.

    default method warning: This class does not forward calls to default methods. Instead, it inherits their default implementations. When those implementations invoke methods, they invoke methods on the ForwardingNavigableSet.

    Each of the standard methods uses the set's comparator (or the natural ordering of the elements, if there is no comparator) to test element equality. As a result, if the comparator is not consistent with equals, some of the standard implementations may violate the Set contract.

    The standard methods and the collection views they return are not guaranteed to be thread-safe, even when all of the methods that they depend on are thread-safe.

    Since:
    12.0
    Author:
    Louis Wasserman