Baggage class

Immutable Baggage that stores entries with unique string keys.

Baggage is immutable. Adding or removing entries returns a new instance. The specification states that if an entry is added with a key that already exists, it MUST overwrite the existing entry.

Annotations

• @immutable

Constructors

Baggage.fromJson(Map<String, dynamic> json)

Creates a baggage instance from a JSON representation. JSON format must be: { key: { value: string, metadata?: string } }

factory

Properties

hashCode → int

The hash code for this object.

no setter, override

isEmpty → bool

Returns true if this Baggage contains no entries.

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

copyWith(String key, String value, [String? metadata]) → Baggage

Returns a new Baggage with the given key-value pair added (or replaced).

copyWithBaggage(Baggage moreBaggage) → Baggage

Creates a new Context adding in moreBaggage, replacing any existing keys that are the same as the keys in moreBaggage

copyWithout(String key) → Baggage

Returns a new Baggage with the given key removed (if it exists).

getAllEntries() → Map<String, BaggageEntry>

Returns all entries in this Baggage as an immutable map.

getAllValues() → List<String>

Retrieves all Baggage values for the given key, or null if not present.

getEntry(String key) → BaggageEntry?

Retrieves a BaggageEntry for the given key, or null if not present.

getValue(String key) → String?

Retrieves a Baggage value for the given key, or null if not present.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toJson() → Map<String, dynamic>

Converts the baggage to a JSON representation.

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

override

operator [](String key) → String?

Operator overload for getting a value