Basic implementation of an unmodifiable Map.
This class has a basic implementation of all but two of the members of
an umodifiable Map.
A simple unmodifiable Map class can be implemented by extending this
class and implementing keys and operator[].
Modifying operations throw when used.
The remaining non-modifying operations are implemented in terms of keys
and operator[].
The keys iterable should have efficient length and contains
operations, and it should catch concurrent modifications of the keys
while iterating.
A more efficient implementation is usually possible by overriding some of the other members as well.
Properties
Constructors
- UnmodifiableMapBase()
-
const
Operators
-
operator [](
Object key) → V -
inherited
Returns the value for the given
keyor null ifkeyis not in the map.… -
operator []=(
K key, V value) → void -
inherited
Associates the
keywith the givenvalue.…
Methods
-
addAll(
Map<K,V> other) → void -
inherited
Adds all key-value pairs of
otherto this map.… -
clear(
) → void -
inherited
Removes all pairs from the map.…
-
containsKey(
Object key) → bool -
inherited
Returns true if this map contains the given
key.… -
containsValue(
V value) → bool -
inherited
Returns true if this map contains the given
value.… -
forEach(
void action(K key, V value)) → void -
inherited
Applies
fto each key-value pair of the map.… -
putIfAbsent(
K key, V ifAbsent()) → V -
inherited
Look up the value of
key, or add a new value if it isn't there.… -
remove(
Object key) → V -
inherited
Removes
keyand its associated value, if present, from the map.… -
toString(
) → String -
inherited
Returns a string representation of this object.