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Seamlessly generate extension methods and json conversion classes for your enums using enum_assist

Annotations for the enum_assist code-generator.
Without enum_assist, this package does nothing.

Index #

Enum Assist #

Generation settings for the enum

Creation Settings #

Determine which default methods to generate

  • createJsonConv
  • createName
  • createDescription
  • createToInt
  • createReadable
  • createSerialized

Serialized Format #

Formats the enum's serialized values.

change_case is used to format the serialized value.
The possible values are from SerializedFormat

// SerializedFormat.none (default)
static const _professionalName = 'professional';

// SerializedFormat.snake
static const _veryProfessionalName = 'very_professional';

Use Doc Comment As Description #

Use the enum value's doc comment as the description.

Returns null when false, unless defined via EnumValue.description.

@EnumAssist(useDocCommentAsDescription: true)
enum Greeting {
  /// A professional greeting
  professional,
  /// A friendly greeting
  friendly,
  /// A relaxed greeting
  ///
  /// Which is my favorite!
  relaxed,
}

// "A relaxed greeting
//
// Which is my favorite!"
Greeting.relaxed.description;

Use Int Value For Serialization #

Use the enum's int value for serialization.

The serializedValue arg will be ignored when true.

@EnumAssist(useIntValueForSerialization: true)
enum Greeting {
  professional,
  friendly,
  relaxed,
}

Greeting.relaxed.serialized; // 2

Notice This: Instead of returning friendly, it will return the intValue of the friendly field, which is 1

Enum Value #

Customize the generator for a specific enum value.

Readable #

The name in a human readable format.

@EnumAssist()
enum Greeting {
  @EnumValue(readable: 'Formal')
  professional,
  friendly,
  relaxed,
}

Greeting.professional.readable; // Formal
Greeting.friendly.readable; // Friendly

Description #

The description of the enum value.

Expected Return Value:

@EnumAssist()
enum Greeting {
  /// A professional greeting
  @EnumValue(description: 'Recommended to use in the work place')
  professional,
  /// A friendly greeting
  friendly,
  relaxed,
}

Greeting.friendly.description; // A friendly greeting
Greeting.professional.description; // Recommended to use in the work place

Int Value #

Provides the int value for toInt of the enum value.

0 indexed integers used to represent the enum value.
When a value is assigned to EnumValue.intValue, the value will be passed on to the next enum field, incrementing by 1.

@EnumAssist()
enum ResponseCodes {
  @EnumValue(intValue: 200)
  ok,
  created,
  accepted,

  @EnumValue(intValue: 400)
  badRequest,
  unauthorized,

  @EnumValue(intValue: 403)
  forbidden,
  notFound,

  @EnumValue(intValue: 500)
  internalServerError,
  notImplemented,
  badGateway,
  serviceUnavailable,
}

ResponseCode.ok.toInt; // 200
ResponseCode.created.toInt; // 201
ResponseCode.accepted.toInt; // 202

ResponseCode.badRequest.toInt; // 400
ResponseCode.unauthorized.toInt; // 401

ResponseCode.forbidden.toInt; // 403
ResponseCode.notFound.toInt; // 404

ResponseCode.internalServerError.toInt; // 500
ResponseCode.notImplemented.toInt; // 501
ResponseCode.badGateway.toInt; // 502
ResponseCode.serviceUnavailable.toInt; // 503

Serialized Value #

Provides the serialized representation of the enum value for serialized and json converter classes.

Important!: While the type for serializedValue is Object?, the only accepted types are String, and int.

@EnumAssist()
enum Greeting {
  @EnumValue(serializedValue: 'formal')
  professional,
  friendly,
  @EnumValue(serializedValue: 3)
  relaxed,
}

Greeting.professional.serialized; // formal
Greeting.friendly.serialized; // friendly
Gretting.relaxed.serialized; // 3

Use Doc Comment As Description #

Use the enum value's doc comment as the description.

returns null when false, unless defined via EnumValue.description.

@EnumAssist()
enum Greeting {
  /// A professional greeting
  @EnumValue(useDocCommentAsDescription: false)
  professional,
  /// A friendly greeting
  friendly,
  relaxed,
}

Greeting.friendly.description; // A friendly greeting
Greeting.professional.description; // null

Extensions #

Custom Extension Methods to be created for the enum, specified with the value of the enum field.

Extension classes must extend

  • MapExtension, representing the .map(...) method
  • MaybeExtension, representing the .maybeMap(...) method
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Seamlessly generate extension methods and json conversion classes for your enums using enum_assist

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Documentation

API reference

License

MIT (license)

Dependencies

json_annotation, meta

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