VariablesProvider

A base interface for dynamic provisioning of variable values. All implementations of VariablesProvider must be annotated with Variables.

If a viaduct resolver declares a VariablesProvider, it will be invoked at request time to provide additional variable values that may be used in an Resolver.objectValueFragment.

Example:

@Resolver("baz(${'$'}x)")
class FooBarResolver : FooResolvers.Bar() {

  @Variables("x: Int")
  class Vars : VariablesProvider<Arguments.NoArguments> {
    override suspend fun provide(args: Arguments.NoArguments): Map<String, Any?> =
      mapOf("x" to 42)
  }
}