public abstract class AbstractObject2ReferenceMap<K,V> extends AbstractObject2ReferenceFunction<K,V> implements Object2ReferenceMap<K,V>, Serializable
Optional operations just throw an UnsupportedOperationException. Generic versions of accessors delegate to
the corresponding type-specific counterparts following the interface rules
(they take care of returning null on a missing key).
As a further help, this class provides a BasicEntry inner class
that implements a type-specific version of Map.Entry; it
is particularly useful for those classes that do not implement their own
entries (e.g., most immutable maps).
| Modifier and Type | Class and Description |
|---|---|
static class |
AbstractObject2ReferenceMap.BasicEntry<K,V>
This class provides a basic but complete type-specific entry class for all those maps implementations
that do not have entries on their own (e.g., most immutable maps).
|
static class |
AbstractObject2ReferenceMap.BasicEntrySet<K,V>
This class provides a basic implementation for an Entry set which forwards some queries to the map.
|
Object2ReferenceMap.Entry<K,V>, Object2ReferenceMap.FastEntrySet<K,V>defRetValue| Modifier | Constructor and Description |
|---|---|
protected |
AbstractObject2ReferenceMap() |
| Modifier and Type | Method and Description |
|---|---|
boolean |
containsKey(Object k)
Returns true if this function contains a mapping for the specified key.
|
boolean |
containsValue(Object v) |
boolean |
equals(Object o) |
int |
hashCode()
Returns a hash code for this map.
|
boolean |
isEmpty() |
ObjectSet<K> |
keySet()
Returns a type-specific-set view of the keys of this map.
|
void |
putAll(Map<? extends K,? extends V> m) |
String |
toString() |
ReferenceCollection<V> |
values()
Returns a type-specific-set view of the values of this map.
|
defaultReturnValue, defaultReturnValueclone, finalize, getClass, notify, notifyAll, wait, wait, waitclear, defaultReturnValue, defaultReturnValue, entrySet, object2ReferenceEntrySet, put, remove, sizegetcompute, computeIfAbsent, computeIfPresent, forEach, get, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAllpublic boolean containsValue(Object v)
containsValue in interface Map<K,V>public boolean containsKey(Object k)
Object2ReferenceMapcontainsKey in interface Object2ReferenceMap<K,V>containsKey in interface Map<K,V>k - the key.key.Map.containsKey(Object)public ObjectSet<K> keySet()
The view is backed by the set returned by Map.entrySet(). Note that
no attempt is made at caching the result of this method, as this would
require adding some attributes that lightweight implementations would
not need. Subclasses may easily override this policy by calling
this method and caching the result, but implementors are encouraged to
write more efficient ad-hoc implementations.
keySet in interface Object2ReferenceMap<K,V>keySet in interface Map<K,V>Map.keySet()public ReferenceCollection<V> values()
The view is backed by the set returned by Map.entrySet(). Note that
no attempt is made at caching the result of this method, as this would
require adding some attributes that lightweight implementations would
not need. Subclasses may easily override this policy by calling
this method and caching the result, but implementors are encouraged to
write more efficient ad-hoc implementations.
values in interface Object2ReferenceMap<K,V>values in interface Map<K,V>Map.values()public int hashCode()
public boolean equals(Object o)
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