IWorkspace CreateWorkspace()
{
var assignableTargets = MakeAssignableEntities(targetObjects, selectedBackendType);
object[] targetArray = assignableTargets.Any() ?
assignableTargets.ToArray() :
targetObjects != null ?
new object[] { } :
null; // make sure to pass null, NOT an empty array
var ctorArguments = new object[]
{
selectedBackendType,
targetArray,
(GetAPI)window.GetAPI,
(Action)window.Repaint,
(Action <Action>)window.ExecOnUpdate
};
var backendArguments = BackendTypeUtil.GetGenericArguments(selectedBackendType);
return((IWorkspace)Activator.CreateInstance
(
typeof(Workspace <,>).MakeGenericType(backendArguments),
System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance,
null,
ctorArguments,
null
));
}
static IEnumerable <object> MakeAssignableEntities(IEnumerable <object> objs, Type backendType)
{
if (objs == null)
{
yield break;
}
Type acceptedType = BackendTypeUtil.BackendAttrType(backendType);
Type entityType = BackendTypeUtil.GetGenericArguments(backendType)[0];
foreach (var obj in objs)
{
if (acceptedType != null && acceptedType.IsAssignableFrom(obj.GetType()))
{
yield return(obj);
}
else
{
yield return(TypeUtil.MakeAssignable(obj, entityType));
}
}
}
