class
UnmodifiableMapBase<K, V>

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

Properties

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

Constructors

UnmodifiableMapBase()
const

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].

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.