// Constant
public static IObjectFieldDescriptor Resolver(
this IObjectFieldDescriptor descriptor,
object constantResult)
{
if (descriptor == null)
{
throw new ArgumentNullException(nameof(descriptor));
}
return(descriptor.Resolver(
ctx => Task.FromResult <object>(constantResult)));
}
public static IObjectFieldDescriptor Resolver <TResult>(
this IObjectFieldDescriptor descriptor,
TResult constantResult)
{
if (descriptor == null)
{
throw new ArgumentNullException(nameof(descriptor));
}
return(descriptor.Resolver(
ctx => new ValueTask <object?>(constantResult),
typeof(NativeType <TResult>)));
}
public static IObjectFieldDescriptor Resolver(
this IObjectFieldDescriptor descriptor,
Func <IResolverContext, object?> resolver)
{
if (descriptor == null)
{
throw new ArgumentNullException(nameof(descriptor));
}
if (resolver == null)
{
throw new ArgumentNullException(nameof(resolver));
}
return(descriptor.Resolver(ctx => new ValueTask <object?>(resolver(ctx))));
}
public static IObjectFieldDescriptor Resolver(
this IObjectFieldDescriptor descriptor,
Func <Task <object?> > resolver)
{
if (descriptor == null)
{
throw new ArgumentNullException(nameof(descriptor));
}
if (resolver == null)
{
throw new ArgumentNullException(nameof(resolver));
}
return(descriptor.Resolver(async ctx => await resolver().ConfigureAwait(false)));
}
public static IObjectFieldDescriptor Resolver(
this IObjectFieldDescriptor descriptor,
Func <Task <object> > resolver)
{
if (descriptor == null)
{
throw new ArgumentNullException(nameof(descriptor));
}
if (resolver == null)
{
throw new ArgumentNullException(nameof(resolver));
}
return(descriptor.Resolver(ctx => resolver()));
}
public override void OnConfigure(
IDescriptorContext context,
IObjectFieldDescriptor descriptor,
MemberInfo member)
{
descriptor.Resolver(
new List <Bar>
{
new Bar {
BarBaz = "a_a", BarQux = "a_c"
},
new Bar {
BarBaz = "a_b", BarQux = "a_d"
}
});
}
// Resolver(IResolverContext, CancellationToken)
public static IObjectFieldDescriptor Resolver(
this IObjectFieldDescriptor descriptor,
Func <IResolverContext, CancellationToken, object> resolver)
{
if (descriptor == null)
{
throw new ArgumentNullException(nameof(descriptor));
}
if (resolver == null)
{
throw new ArgumentNullException(nameof(resolver));
}
return(descriptor.Resolver(
ctx => resolver(ctx, ctx.RequestAborted)));
}
public static IObjectFieldDescriptor Resolver <TResult>(
this IObjectFieldDescriptor descriptor,
Func <IResolverContext, CancellationToken, TResult> resolver)
{
if (descriptor == null)
{
throw new ArgumentNullException(nameof(descriptor));
}
if (resolver == null)
{
throw new ArgumentNullException(nameof(resolver));
}
return(descriptor.Resolver(
ctx => new ValueTask <object?>(resolver(ctx, ctx.RequestAborted)),
typeof(NativeType <TResult>)));
}
public static IObjectFieldDescriptor Resolver <TResult>(
this IObjectFieldDescriptor descriptor,
Func <TResult> resolver)
{
if (descriptor == null)
{
throw new ArgumentNullException(nameof(descriptor));
}
if (resolver == null)
{
throw new ArgumentNullException(nameof(resolver));
}
return(descriptor.Resolver(ctx =>
Task.FromResult <object>(resolver()),
typeof(NativeType <TResult>)));
}
public static IObjectFieldDescriptor Resolver <TResult>(
this IObjectFieldDescriptor descriptor,
Func <IResolverContext, Task <TResult> > resolver)
{
if (descriptor == null)
{
throw new ArgumentNullException(nameof(descriptor));
}
if (resolver == null)
{
throw new ArgumentNullException(nameof(resolver));
}
return(descriptor.Resolver(
async ctx => await resolver(ctx).ConfigureAwait(false),
typeof(NativeType <TResult>)));
}
public override void OnConfigure(
IDescriptorContext context,
IObjectFieldDescriptor descriptor,
MemberInfo member)
{
descriptor.Resolver(ctx =>
{
ICharacter character = ctx.Parent <ICharacter>();
ICharacterRepository repository = ctx.Service <ICharacterRepository>();
//********************************************************************************
//Perform some pre-processed Paging (FYI, without sorting this may be unprdeicatble
// but works here due to the in-memory store used by Star Wars example!
var graphQLParams = new GraphQLParamsContext(ctx);
var friends = repository.GetCharacters(character.Friends.ToArray());
var pagedFriends = friends.SliceAsCursorPage(graphQLParams.PagingArgs);
return(new PreProcessedCursorSlice <ICharacter>(pagedFriends));
//********************************************************************************
});
}
public static IObjectFieldDescriptor Resolver(
this IObjectFieldDescriptor descriptor,
AsyncFieldResolverDelegate fieldResolver)
{
return(descriptor.Resolver(fieldResolver));
}
public static IObjectFieldDescriptor Resolver(
this IObjectFieldDescriptor descriptor,
Func <Task <object> > fieldResolver)
{
return(descriptor.Resolver(ctx => fieldResolver()));
}