public static bool TryCreate(object items, [NotNullWhen(true)] out CollectionTeaser?collectionTeaser)
{
collectionTeaser = null;
if (items is IList list)
{
collectionTeaser = new CollectionTeaser(i => list.Add(i), list.Remove);
}
else if (items != null)
{
var itemsType = items.GetType();
var genericCollectionType = typeof(ICollection <>);
//TODO, *IF* we really wanted to we could get the consumer to inform us of the correct type
//if there are multiple impls. havent got time for this edge case right now though
var collectionImplType = itemsType.GetInterfaces().SingleOrDefault(x =>
x.IsGenericType &&
x.GetGenericTypeDefinition() == genericCollectionType);
if (collectionImplType != null)
{
var genericArgType = collectionImplType.GetGenericArguments().First();
var addMethodInfo = collectionImplType.GetMethod("Add", new[] { genericArgType });
var removeMethodInfo = collectionImplType.GetMethod("Remove", new[] { genericArgType });
collectionTeaser = new CollectionTeaser(
i => addMethodInfo.Invoke(items, new[] { i }),
i => removeMethodInfo.Invoke(items, new[] { i }));
}
}
return(collectionTeaser != null);
}
public static bool TryCreate(object items, out CollectionTeaser collectionTeaser)
{
collectionTeaser = null;
var list = items as IList;
if (list != null)
{
collectionTeaser = new CollectionTeaser(i => list.Add(i), list.Remove);
}
else if (items != null)
{
var itemsType = items.GetType();
var genericCollectionType = typeof (ICollection<>);
//TODO, *IF* we really wanted to we could get the consumer to inform us of the correct type
//if there are multiple impls. havent got time for this edge case right now though
var collectionImplType = itemsType.GetInterfaces().SingleOrDefault(x =>
x.IsGenericType &&
x.GetGenericTypeDefinition() == genericCollectionType);
if (collectionImplType != null)
{
var genericArgType = collectionImplType.GetGenericArguments().First();
var addMethodInfo = collectionImplType.GetMethod("Add", new[] {genericArgType});
var removeMethodInfo = collectionImplType.GetMethod("Remove", new[] { genericArgType });
collectionTeaser = new CollectionTeaser(
i => addMethodInfo.Invoke(items, new[] {i}),
i => removeMethodInfo.Invoke(items, new[] {i}));
}
}
return collectionTeaser != null;
}