Package com.google.common.collect

Class ForwardingSortedMap<K extends @Nullable Object,​V extends @Nullable Object>

  • All Implemented Interfaces:
    Map<K,​V>, SortedMap<K,​V>
    Direct Known Subclasses:
    ForwardingNavigableMap
    @GwtCompatible
public abstract class ForwardingSortedMap<K extends @Nullable Object,​V extends @Nullable Object>
extends ForwardingMap<K,​V>
implements SortedMap<K,​V>
    A sorted map which forwards all its method calls to another sorted map. Subclasses should override one or more methods to modify the behavior of the backing sorted map as desired per the decorator pattern.

    Warning: The methods of ForwardingSortedMap forward indiscriminately to the methods of the delegate. For example, overriding ForwardingMap.put(K, V) alone will not change the behavior of ForwardingMap.putAll(java.util.Map<? extends K, ? extends V>), which can lead to unexpected behavior. In this case, you should override putAll as well, either providing your own implementation, or delegating to the provided standardPutAll 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 ForwardingSortedMap.

    Each of the standard methods, where appropriate, use the comparator of the map to test equality for both keys and values, unlike ForwardingMap.

    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:
    2.0
    Author:
    Mike Bostock, Louis Wasserman