MapView<K, V> class Null safety

Wrapper around a class that implements Map that only exposes Map members.

A simple wrapper that delegates all Map members to the map provided in the constructor.

Base for delegating map implementations like UnmodifiableMapView.

Implemented types
Implementers

Constructors

MapView(Map<K, V> map)
const

Properties

entries → Iterable<MapEntry<K, V>>
The map entries of this.
read-only, override
hashCode → int
The hash code for this object. [...]
read-only, inherited
isEmpty → bool
Whether there is no key/value pair in the map.
read-only, override
isNotEmpty → bool
Whether there is at least one key/value pair in the map.
read-only, override
keys → Iterable<K>
The keys of this. [...]
read-only, override
length → int
The number of key/value pairs in the map.
read-only, override
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited
values → Iterable<V>
The values of this. [...]
read-only, override

Methods

addAll(Map<K, V> other) → void
Adds all key/value pairs of other to this map. [...]
override
addEntries(Iterable<MapEntry<K, V>> entries) → void
Adds all key/value pairs of newEntries to this map. [...]
override
cast<RK, RV>() → Map<RK, RV>
Provides a view of this map as having RK keys and RV instances, if necessary. [...]
override
clear() → void
Removes all entries from the map. [...]
override
containsKey(Object? key) → bool
Whether this map contains the given key. [...]
override
containsValue(Object? value) → bool
Whether this map contains the given value. [...]
override
forEach(void action(K key, V value)) → void
Applies action to each key/value pair of the map. [...]
override
map<K2, V2>(MapEntry<K2, V2> transform(K key, V value)) → Map<K2, V2>
Returns a new map where all entries of this map are transformed by the given convert function.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
putIfAbsent(K key, V ifAbsent()) → V
Look up the value of key, or add a new entry if it isn't there. [...]
override
remove(Object? key) → V?
Removes key and its associated value, if present, from the map. [...]
override
removeWhere(bool test(K key, V value)) → void
Removes all entries of this map that satisfy the given test. [...]
override
toString() → String
A string representation of this object. [...]
override
update(K key, V update(V value), {V ifAbsent()?}) → V
Updates the value for the provided key. [...]
override
updateAll(V update(K key, V value)) → void
Updates all values. [...]
override

Operators

operator ==(Object other) → bool
The equality operator. [...]
inherited
operator [](Object? key) → V?
The value for the given key, or null if key is not in the map. [...]
override
operator []=(K key, V value) → void
Associates the key with the given value. [...]
override