DelegatingMap<K, V> class

A Map that delegates all operations to a base map.

This class can be used to hide non-Map methods of an object that extends Map, or it can be extended to add extra functionality on top of an existing map object.

Implemented types
Implementers

Constructors

DelegatingMap(Map<K, V> base)
const

Properties

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

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<K2, V2>() Map<K2, V2>
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 f(K, V)) → void
Applies action to each key/value pair of the map.
override
map<K2, V2>(MapEntry<K2, V2> transform(K, V)) 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 nonexistent 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, V)) → void
Removes all entries of this map that satisfy the given test.
override
retype<K2, V2>() Map<K2, V2>
toString() String
A string representation of this object.
override
update(K key, V update(V), {V ifAbsent()?}) → V
Updates the value for the provided key.
override
updateAll(V update(K, V)) → 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

Static Methods

typed<K, V>(Map base) Map<K, V>
Creates a wrapper that asserts the types of keys and values in base.