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

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