public IModelTime CreateModelTime(ISource aSource)
{
if (aSource != null && aSource is Source)
{
Source source = aSource as Source;
if (aSource.Type == kSourceUpnpAv)
{
ModelSourceMediaRendererUpnpAv result = CheckModelCache(iModelSourceCache, source) as ModelSourceMediaRendererUpnpAv;
if (result == null)
{
result = new ModelSourceMediaRendererUpnpAv(source);
AddToCache(iModelSourceCache, (result as ModelSource), source);
}
return(result);
}
else
{
IModelTime result = CheckModelCache(iModelTimeCache, source);
if (result == null)
{
result = new ModelTime(source);
AddToCache(iModelTimeCache, result, source);
}
return(result);
}
}
return(null);
}
private void AddToCache(IModelTime aModelTime, Source aSource)
{
string id = string.Format("{0},{1}", aSource.Device, aSource);
if (iModelTimeCache.ContainsKey(id))
{
iModelTimeCache[id] = aModelTime;
}
else
{
iModelTimeCache.Add(id, aModelTime);
}
}
private IModelTime CheckModelTimeCache(Source aSource)
{
string id = string.Format("{0},{1}", aSource.Device, aSource);
IModelTime result = null;
if (iModelTimeCache.TryGetValue(id, out result))
{
if (result.Device != aSource.Device)
{
iModelTimeCache.Remove(id);
result = null;
}
}
return(result);
}