Package com.google.common.collect

Class ForwardingConcurrentMap<K,​V>

  • All Implemented Interfaces:
    java.util.concurrent.ConcurrentMap<K,​V>, java.util.Map<K,​V>
    @GwtCompatible
public abstract class ForwardingConcurrentMap<K,​V>
extends ForwardingMap<K,​V>
implements java.util.concurrent.ConcurrentMap<K,​V>
    A concurrent map which forwards all its method calls to another concurrent map. Subclasses should override one or more methods to modify the behavior of the backing map as desired per the decorator pattern.

    default method warning: This class forwards calls to only some default methods. Specifically, it forwards calls only for methods that existed before default methods were introduced. For newer methods, like forEach, it inherits their default implementations. When those implementations invoke methods, they invoke methods on the ForwardingConcurrentMap.

    Since:
    2.0
    Author:
    Charles Fry

    • Method Detail

      • delegate

        protected abstract java.util.concurrent.ConcurrentMap<K,​V> delegate()
        Description copied from class: ForwardingObject
        Returns the backing delegate instance that methods are forwarded to. Abstract subclasses generally override this method with an abstract method that has a more specific return type, such as ForwardingSet.delegate(). Concrete subclasses override this method to supply the instance being decorated.
        Specified by:
        delegate in class ForwardingMap<K,​V>

      • replace

        @CanIgnoreReturnValue
public boolean replace​(K key,
                       V oldValue,
                       V newValue)
        Specified by:
        replace in interface java.util.concurrent.ConcurrentMap<K,​V>
        Specified by:
        replace in interface java.util.Map<K,​V>