UnmodifiableMapBase<K, V> class

Basic implementation of an unmodifiable Map.

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.

Extends

Constructors

UnmodifiableMapBase()
const

Instance Properties

length int Inherited
read-only
isEmpty bool Inherited
read-only
isNotEmpty bool Inherited
read-only
values Iterable<V> Inherited
read-only
keys Iterable<K> Inherited
read-only
values Iterable<V> Inherited
read-only

Instance Methods

toString() → String Inherited
Returns a string representation of this object.
forEach(void action(K key, V value)) → void Inherited
Applies [f] to each key-value pair of the map.
addAll(Map<K,V> other) → void Inherited
Adds all key-value pairs of [other] to this map.
containsValue(V value) → bool Inherited
Returns true if this map contains the given [value].
putIfAbsent(K key, V ifAbsent()) → V Inherited
Look up the value of [key], or add a new value if it isn't there.
containsKey(Object key) → bool Inherited
Returns true if this map contains the given [key].
clear() → void Inherited
Removes all pairs from the map.
remove(Object key) → V Inherited
Removes [key] and its associated value, if present, from the map.
remove(Object key) → V Inherited
Removes [key] and its associated value, if present, from the map.
clear() → void Inherited
Removes all pairs from the map.
addAll(Map<K,V> other) → void Inherited
Adds all key-value pairs of [other] to this map.
forEach(void action(K key, V value)) → void Inherited
Applies [f] to 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.

Operators

operator [](Object key) → V Inherited
Returns the value for the given [key] or null if [key] is not in the map.
operator []=(K key, V value) → void Inherited
Associates the [key] with the given [value].