SequentialGetter<T, R> class abstract

Represents a utility for getting attributes of a sequential context.

A sequential means that more than one value is involved (e.g. fetching data sequentially from a sensor). To be able to extract attributes from sequential data, this utility provides an accept method, which can be called multiple times. Every time accept is called, an attribute can be extracted (e.g. the first value passed as argument, the last value passed as argument, how many values were passed as argument overall).

Implementers

• FirstValueGetter
• PreviousValueGetter

Constructors

SequentialGetter()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

accept(T value) → R

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

first<T>() → FirstValueGetter<T>

Evaluates the first value passed to the accept method of this object.

previous<T>() → PreviousValueGetter<T>

Evaluates the previous value passed to the accept method of this object, returning null in the first call.