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

Class DataLoaderMethodArgumentResolver

java.lang.Object

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

All Implemented Interfaces:

HandlerMethodArgumentResolver

public class DataLoaderMethodArgumentResolver
extends Object
implements HandlerMethodArgumentResolver

Resolver for a DataLoader obtained via DataFetchingEnvironment.getDataLoader(String).

The DataLoader key is based on one of the following:

1. The full name of the value type from the DataLoader generic types.
2. The method parameter name.

Since:

1.0.0

Author:

Rossen Stoyanchev

Constructor Summary

Constructors

Constructor	Description
DataLoaderMethodArgumentResolver()

Method Summary

Modifier and Type	Method	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 Details

DataLoaderMethodArgumentResolver

public DataLoaderMethodArgumentResolver()

Method Details

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.