A WiringFactory implementation is used by the GraphQL runtime to gain information about, for example, the types and scalars necessary to process a query. To do this, a WiringFactory consists of several provides* methods and corresponding factory methods, for example, to create DataFetcher instances.

The Headless Server employs a custom implementation of a WiringFactory class, the ModelMappingWiringFactory. Basically, the ModelMappingWiringFactory class extends CombinedWiringFactory and applies additional instances of ModelMapper on the results of the DataFetcher instances. The CombinedWiringFactory class is basically a WiringFactory which delegates calls to several WiringFactory instances, while acting as one WiringFactory for the GraphQL runtime.