UnmodifiableMapView<K, V> class
View of a Map that disallow modifying the map.
A wrapper around a Map that forwards all members to the map provided in the constructor, except for operations that modify the map. Modifying operations throw instead.
Constructors
- UnmodifiableMapView(Map<
K, V> map)
Properties
- entries → Iterable<
MapEntry< K, V> >read-only, inherited - The map entries of this.
- hashCode → int read-only, inherited
- The hash code for this object. [...]
- isEmpty → bool read-only, inherited
- Whether there is no key/value pair in the map.
- isNotEmpty → bool read-only, inherited
- Whether there is at least one key/value pair in the map.
- keys → Iterable<
K> read-only, inherited - The keys of this. [...]
- length → int read-only, inherited
- The number of key/value pairs in the map.
- runtimeType → Type read-only, inherited
- A representation of the runtime type of the object.
- values → Iterable<
V> read-only, inherited - The values of this. [...]
Methods
- addAll(
Map< K, V> other) → voidinherited - This operation is not supported by an unmodifiable map.
- addEntries(
Iterable< MapEntry< entries) → voidK, V> >inherited - This operation is not supported by an unmodifiable map.
- cast<
RK, RV> () → Map< RK, RV> override - Provides a view of this map as having
RKkeys andRVinstances, if necessary. [...] - clear(
) → void inherited - This operation is not supported by an unmodifiable map.
- containsKey(
Object? key) → bool inherited - Whether this map contains the given
key. [...] - containsValue(
Object? value) → bool inherited - Whether this map contains the given
value. [...] - forEach(
void action(K key, V value)) → void inherited - Applies
actionto each key/value pair of the map. [...] - map<
K2, V2> (MapEntry< K2, V2> transform(K key, V value)) → Map<K2, V2> inherited - Returns a new map where all entries of this map are transformed by the given
convertfunction. - noSuchMethod(
Invocation invocation) → dynamic inherited - Invoked when a non-existent method or property is accessed. [...]
- putIfAbsent(
K key, V ifAbsent()) → V inherited - This operation is not supported by an unmodifiable map.
- remove(
Object? key) → V? inherited - This operation is not supported by an unmodifiable map.
- removeWhere(
bool test(K key, V value)) → void inherited - This operation is not supported by an unmodifiable map.
- toString(
) → String inherited - A string representation of this object. [...]
- update(
K key, V update(V value), {V ifAbsent()}) → V inherited - This operation is not supported by an unmodifiable map.
- updateAll(
V update(K key, V value)) → void inherited - This operation is not supported by an unmodifiable map.
Operators
- operator ==(
Object other) → bool inherited - The equality operator. [...]
- operator [](
Object? key) → V? inherited - The value for the given
key, ornullifkeyis not in the map. [...] - operator []=(
K key, V value) → void inherited - This operation is not supported by an unmodifiable map.
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.13.0/dart-collection/UnmodifiableMapView-class.html