org.springframework.graphql.data.method.annotation.support

Class SourceMethodArgumentResolver

java.lang.Object

org.springframework.graphql.data.method.annotation.support.SourceMethodArgumentResolver

All Implemented Interfaces:

HandlerMethodArgumentResolver

public class SourceMethodArgumentResolver
extends Object
implements HandlerMethodArgumentResolver

Resolver for the source/parent of a field, obtained via DataFetchingEnvironment.getSource().

This resolver supports any type excluding enums, dates, arrays, wide range of types, including any non-simple type, along with any CharSequence, or Number. Hence, it must come last in the order or resolvers, as a fallback after all others.

Since:

1.0.0

Author:

Rossen Stoyanchev

Constructor Summary

Constructors

Constructor and Description
SourceMethodArgumentResolver()

Method Summary

Modifier and Type	Method and Description
Object	resolveArgument(MethodParameter parameter, DataFetchingEnvironment environment) Resolve a method parameter to a value.
boolean	supportsParameter(MethodParameter parameter) Whether this resolver supports the given MethodParameter.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SourceMethodArgumentResolver

public SourceMethodArgumentResolver()

Method Detail

supportsParameter

public boolean supportsParameter(MethodParameter parameter)

Description copied from interface: HandlerMethodArgumentResolver

Whether this resolver supports the given MethodParameter.

Specified by:

supportsParameter in interface HandlerMethodArgumentResolver

resolveArgument

public Object resolveArgument(MethodParameter parameter,
                              DataFetchingEnvironment environment)

Description copied from interface: HandlerMethodArgumentResolver

Resolve a method parameter to a value.

Specified by:

resolveArgument in interface HandlerMethodArgumentResolver

Parameters:

parameter - the method parameter to resolve. This parameter must have previously checked via HandlerMethodArgumentResolver.supportsParameter(org.springframework.core.MethodParameter).

environment - the environment to use to resolve the value

Returns:

the resolved value, which may be null if not resolved; the value may also be a Mono if it requires asynchronous resolution.