| 28 |
|
* @param <V> the type of mapped values |
| 29 |
|
*/ |
| 30 |
|
public interface ConcurrentMap<K,V> extends Map<K,V> { |
| 31 |
+ |
|
| 32 |
+ |
/** |
| 33 |
+ |
* {@inheritDoc} |
| 34 |
+ |
* |
| 35 |
+ |
* @implNote This implementation assumes that the ConcurrentMap cannot |
| 36 |
+ |
* contain null values and get() returning null unambiguously means the key |
| 37 |
+ |
* is absent. Implementations which support null values must override this |
| 38 |
+ |
* default implementation. |
| 39 |
+ |
*/ |
| 40 |
+ |
@Override |
| 41 |
+ |
default V getOrDefault(Object key, V defaultValue) { |
| 42 |
+ |
V v; |
| 43 |
+ |
return ((v = get(key)) != null) ? v : defaultValue; |
| 44 |
+ |
} |
| 45 |
+ |
|
| 46 |
|
/** |
| 47 |
|
* If the specified key is not already associated |
| 48 |
|
* with a value, associate it with the given value. |
