public static T Select <TObject, T>(IValueAccessor <TObject> value, DataReference dataReference, Func <TObject, DataReference, T> selector)
where TObject : GraphQLObject
{
Check.IsNotNull(value, nameof(value));
Check.IsNotNull(selector, nameof(selector));
var childReference = new DataReference(value.GetValue(dataReference));
return(selector(value.GraphQLType, childReference));
}
private static Action <IInvocation> GetValueAccessorGet(PropertyInfo property, IValueAccessor accessor)
{
return((invocation) => invocation.ReturnValue = accessor.GetValue(
new ValueAccessorContext
{
Instance = invocation.InvocationTarget as IInterceptableType,
Property = property,
BackingPropertyGetter = () => { invocation.Proceed(); return invocation.ReturnValue; },
BackingPropertySetter = (value) => { throw new NotSupportedException("Setting property not supported while getting"); },
},
property.Name));
}
private static IEnumerable <T> Select <TObject, T>(IValueAccessor value, DataReference dataReference, Func <TObject, DataReference, T> selector, TObject tObject)
where TObject : GraphQLObject
{
if (value.GetValue(dataReference) is IEnumerable enumerable)
{
return(enumerable
.OfType <object>()
.Select(x => selector(tObject, new DataReference(x)))
.ToList());
}
throw new Exception("not an enumerable");
}
public TMonad GetValue(IContext <TMonad> ctx)
{
var overrideContext = ctx as OverrideContext <TMonad>;
if (overrideContext.Overrides.TryGetValue(propName, out var v))
{
return(v);
}
if (baseAccessor == null && overrideContext.BaseContext.TryGetAccessor(propName, out var accessor))
{
baseAccessor = accessor;
}
return(baseAccessor == null
? ctx.Monad.Unit
: baseAccessor.GetValue(overrideContext.BaseContext));
}
public TMonad Evaluate(IContext <TMonad> context)
{
var cType = context.GetType();
if (cType == lastType)
{
return(lastAccessor.GetValue(context));
}
if (!accessors.TryGetValue(cType, out var accessor))
{
if (!context.TryGetAccessor(Name, out accessor))
{
accessor = new UnitAccessor <TMonad>(Monad);
}
accessors[cType] = accessor;
}
lastType = cType;
lastAccessor = accessor;
return(accessor.GetValue(context));
}
private static Action<IInvocation> GetValueAccessorGet(PropertyInfo property, IValueAccessor accessor)
{
return (invocation) => invocation.ReturnValue = accessor.GetValue(
new ValueAccessorContext
{
Instance = invocation.InvocationTarget as IInterceptableType,
Property = property,
BackingPropertyGetter = () => { invocation.Proceed(); return invocation.ReturnValue; },
BackingPropertySetter = (value) => { throw new NotSupportedException("Setting property not supported while getting"); },
},
property.Name);
}
public object GetValue(DataReference value)
{
var childValue = parentValueAccessor.GetValue(value);
return(childValueAccessor.GetValue(new DataReference(childValue)));
}