RPAnswerFormat class Null safety

A base (abstract) class for different Answer Formats.

The Answer Format describes the format how a question can be answered. Research Package uses RPQuestionStep and RPFormStep (RPQuestionSteps on a single page) to represent a question in a survey. Each questions needs to have an associated Answer Format. Note: This class should be an abstract class but since we need to serialize it we have to provide a constructor and factory. There's no better solution found yet. Used in RPStepResult

Inheritance
Implementers
Annotations

Constructors

RPAnswerFormat()
The default constructor. The appropriate subclass of RPAnswerFormat should be used instead of this directly.
RPAnswerFormat.fromJson(Map<String, dynamic> json)
factory

Properties

$type String?
The runtime class name (type) of this object. Used for deserialization from JSON objects.
read / write, inherited
fromJsonFunction Function
The function which can convert a JSON string to an object of this type.
read-only, override
hashCode int
The hash code for this object. [...]
read-only, inherited
jsonType String
Return the $type to be used for JSON serialization of this class. Default is runtimeType. Only specify this if you need another type.
read-only, inherited
questionType RPQuestionType
The Question Type of the Answer Format. Should be implemented in the subclasses.
read / write
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
toJson() Map<String, dynamic>
Return a JSON encoding of this object.
override
toString() String
A string representation of this object. [...]
inherited

Operators

operator ==(Object other) bool
The equality operator. [...]
inherited