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).
|
Object2ReferenceMap.Entry<K,V>, Object2ReferenceMap.FastEntrySet<K,V>| Modifier and Type | Field and Description |
|---|---|
static long |
serialVersionUID |
defRetValue| Modifier | Constructor and Description |
|---|---|
protected |
AbstractObject2ReferenceMap() |
| Modifier and Type | Method and Description |
|---|---|
boolean |
containsKey(Object k)
Checks whether the given value is contained in
keySet(). |
boolean |
containsValue(Object v)
Checks whether the given value is contained in
values(). |
ObjectSet<Map.Entry<K,V>> |
entrySet()
Returns a set view of the mappings contained in this map.
|
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)
Puts all pairs in the given map.
|
String |
toString() |
ReferenceCollection<V> |
values()
Returns a type-specific-set view of the values of this map.
|
clear, defaultReturnValue, defaultReturnValue, put, removeclone, finalize, getClass, notify, notifyAll, wait, wait, waitobject2ReferenceEntrySetdefaultReturnValue, defaultReturnValuepublic static final long serialVersionUID
public boolean containsValue(Object v)
values().containsValue in interface Map<K,V>public boolean containsKey(Object k)
keySet().containsKey in interface Function<K,V>containsKey in interface Map<K,V>k - the key.key.Map.containsKey(Object)public void putAll(Map<? extends K,? extends V> m)
public ObjectSet<K> keySet()
The view is backed by the set returned by 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 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 ObjectSet<Map.Entry<K,V>> entrySet()
Object2ReferenceMapNote that this specification strengthens the one given in Map.entrySet().
entrySet in interface Object2ReferenceMap<K,V>entrySet in interface Map<K,V>Map.entrySet()public int hashCode()
public boolean equals(Object o)
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