Package com.google.common.collect

Class ForwardingSet<E extends @Nullable Object>

  • All Implemented Interfaces:
    Iterable<E>, Collection<E>, Set<E>
    Direct Known Subclasses:
    ForwardingSortedSet, TypeToken.TypeSet
    @GwtCompatible
public abstract class ForwardingSet<E extends @Nullable Object>
extends ForwardingCollection<E>
implements Set<E>
    A set which forwards all its method calls to another 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 ForwardingSet 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 ForwardingSet.

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

    Since:
    2.0
    Author:
    Kevin Bourrillion, Louis Wasserman