public ICommandExecution Create(ICombineToMakeCommand cmd, object targetModel, InsertOption insertOption = InsertOption.Default)
{
lock (oLockCachedAnswers)
{
CachedDropTarget proposition = new CachedDropTarget(targetModel, insertOption);
//typically user might start a drag and then drag it all over the place so cache answers to avoid hammering database/loading donuts
if (_cachedAnswers.ContainsKey(cmd))
{
//if we already have a cached execution for the command and the target
if (_cachedAnswers[cmd].ContainsKey(proposition))
{
return(_cachedAnswers[cmd][proposition]);//return from cache
}
}
else
{
_cachedAnswers.Add(cmd, new Dictionary <CachedDropTarget, ICommandExecution>()); //novel command
}
var result = CreateNoCache(cmd, targetModel, insertOption);
_cachedAnswers[cmd].Add(new CachedDropTarget(targetModel, insertOption), result);
return(result);
}
}
protected bool Equals(CachedDropTarget other)
{
return(Equals(Target, other.Target) && RelativeLocation == other.RelativeLocation);
}
