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.

Inheritance

Constructors

UnmodifiableMapView(Map<K, V> map)

Properties

entriesIterable<MapEntry<K, V>>
read-only, inherited
The map entries of this.
hashCodeint
read-only, inherited
The hash code for this object. [...]
isEmptybool
read-only, inherited
Whether there is no key/value pair in the map.
isNotEmptybool
read-only, inherited
Whether there is at least one key/value pair in the map.
keysIterable<K>
read-only, inherited
The keys of this. [...]
lengthint
read-only, inherited
The number of key/value pairs in the map.
runtimeTypeType
read-only, inherited
A representation of the runtime type of the object.
valuesIterable<V>
read-only, inherited
The values of this. [...]

Methods

addAll(Map<K, V> other) → void
inherited
This operation is not supported by an unmodifiable map.
addEntries(Iterable<MapEntry<K, V>> entries) → void
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 RK keys and RV instances, 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 action to 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 convert function.
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, or null if key is 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