Avoid IllegalArgumentException for custom error type in ResponseMapGraphQlResponse

[richterdg92]

I can not use there own ErrorClassification

java.lang.IllegalArgumentException: No enum constant org.springframework.graphql.execution.ErrorType.EntityNotFound

	at java.base/java.lang.Enum.valueOf(Enum.java:293)
	at org.springframework.graphql.execution.ErrorType.valueOf(ErrorType.java:30)
	at org.springframework.graphql.client.ResponseMapGraphQlResponse$MapResponseError.getErrorType(ResponseMapGraphQlResponse.java:180)

If i use this guide

class HeaderInterceptor implements WebGraphQlInterceptor { 

    @Override
    public Mono<WebGraphQlResponse> intercept(WebGraphQlRequest request, Chain chain) {
        String value = request.getHeaders().getFirst("myHeader");
        request.configureExecutionInput((executionInput, builder) ->
                builder.graphQLContext(Collections.singletonMap("myHeader", value)).build());
        return chain.next(request);
    }
}

and then throw GraphQLError with custom type

public class CustomExceptionResolver extends DataFetcherExceptionResolverAdapter

My type:

public enum CustomErrorType implements ErrorClassification {
    ENTITY_NOT_FOUND("EntityNotFound"),
    ACCESS_DENIED("AccessDenied");

    private final String errorClassification;

    CustomErrorType(String errorClassification) {
        this.errorClassification = errorClassification;
    }

    @Override
    public String toString() {
        return errorClassification;
    }
}

I'm getting this exception :(

[rstoyanchev]

We can't deserialize to a custom enum type on the client side, but we can use ErrorClassification#errorClassification, so at least it returns something and doesn't fail.