Package graphql.execution.values

Interface InputInterceptor

All Known Implementing Classes:

LegacyCoercingInputInterceptor

public interface InputInterceptor

This INTERNAL class can be used to intercept input values before they are coerced into runtime values by the ValuesResolver code.

You could use it to observe input values and optionally change them. Perhaps some sort of migration of data needs to happen, and you need to know what data you are getting in type terms. This would help you do that.

If this is present in a GraphQLContext it will be called. By default, it is not present so no calls to it will be made.

There is a performance aspect to using this code. If you take too long to return values then you are going to slow down your system depending on how big your input objects are.

Method Summary

Modifier and Type	Method	Description
java.lang.Object	intercept(@Nullable java.lang.Object value, @NonNull GraphQLInputType graphQLType, @NonNull GraphQLContext graphqlContext, @NonNull java.util.Locale locale)	This is called with a value that is to be presented to the ValuesResolver code.

Method Detail

intercept

java.lang.Object intercept(@Nullable java.lang.Object value,
                           @NonNull GraphQLInputType graphQLType,
                           @NonNull GraphQLContext graphqlContext,
                           @NonNull java.util.Locale locale)

This is called with a value that is to be presented to the ValuesResolver code. The values may be scalars, enums and complex input types.

Parameters:

value - the input value that can be null

graphQLType - the input type

graphqlContext - the graphql context in play

locale - the locale in play

Returns:

a value that may differ from the original value