RPAnswerFormat class

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

• Object
• Serializable
• RPAnswerFormat

Implementers

• RPChoiceAnswerFormat
• RPDateTimeAnswerFormat
• RPDoubleAnswerFormat
• RPFormAnswerFormat
• RPImageChoiceAnswerFormat
• RPIntegerAnswerFormat
• RPSliderAnswerFormat
• RPTextAnswerFormat

Annotations

• @JsonSerializable(includeIfNull: false, explicitToJson: true)

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.

getter/setter pair, inherited

fromJsonFunction → Function

The function which can convert a JSON string to an object of this type.

no setter, override

hashCode → int

The hash code for this object.

no setter, 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.

no setter, inherited

questionType ↔ RPQuestionType

The question type of this answer. Should be implemented / overwritten in the subclasses.

getter/setter pair

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent 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