graphql.analysis

Interface QueryReducer<T>

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@PublicApi
 @FunctionalInterface
public interface QueryReducer<T>

Used by QueryTraversal to reduce the fields of a Document (or part of it) to a single value.

How this happens in detail (pre vs post-order for example) is defined by QueryTraversal.

See QueryTraversal.reducePostOrder(QueryReducer, Object) and QueryTraversal.reducePreOrder(QueryReducer, Object)

Method Summary

Modifier and Type	Method and Description
T	reduceField(QueryVisitorFieldEnvironment fieldEnvironment, T acc) Called each time a field is visited.

Method Detail

reduceField

T reduceField(QueryVisitorFieldEnvironment fieldEnvironment,
              T acc)

Called each time a field is visited.

Parameters:

fieldEnvironment - the environment to this call

acc - the previous result

Returns:

the new result