AggregateTransformer

public struct AggregateTransformer<Input, Output> : Transformer

A transformer that aggregates multiple transformers. Multiple aggregate transformers can be chained.

  • Creates a new instance of AggregateTransformer that will pass values in to firstTransformer, then pass the output from firstTransformer in to secondTransformer.

    Declaration

    Swift

    public init<FirstTransformer: Transformer, SecondTransformer: Transformer>(
    firstTransformer: FirstTransformer,
    secondTransformer: SecondTransformer
) where FirstTransformer.Input == Input, FirstTransformer.Output == SecondTransformer.Input, SecondTransformer.Output == Output

    Parameters

    firstTransformer

    The first transformer to call when transforming values.
    secondTransformer

    The second transformer to call when transforming values.

  • Transform the provided value by passing it to the first transformer, then the second transformer.

    Throws

    Any errors thrown by the transformers.

    Declaration

    Swift

    public func transformValue(_ value: Input) throws -> Output

    Parameters

    value

    The value to transform

    Return Value

    The value returned bt the second transformer.

  • Transform the provided value by passing it to the second transformer, then the first transformer.

    Throws

    Any errors thrown by the transformers.

    Declaration

    Swift

    public func untransformValue(_ value: Output) throws -> Input

    Parameters

    value

    The value to transform

    Return Value

    The value returned bt the first transformer.