/// <summary>
/// Gets/Creates the lookup cache for the provided dataset.
/// </summary>
/// <param name="dataSet">The non-null dataset provided by the time-series framework</param>
/// <returns>Lookup cache for the provided dataset.</returns>
public static DataSourceLookupCache GetLookupCache(DataSet dataSet)
{
if ((object)dataSet == null)
{
throw new ArgumentNullException(nameof(dataSet));
}
//Since adding datasets will be rare, the penalty associated with a lock on the entire
//set will be minor.
lock (s_dataSetLookups)
{
DataSourceLookupCache target;
for (int index = 0; index < s_dataSetLookups.Count; index++)
{
WeakReference <DataSourceLookupCache> item = s_dataSetLookups[index];
if (item.TryGetTarget(out target) && target.DataSet != null)
{
if (ReferenceEquals(target.DataSet, dataSet))
{
return(target);
}
}
else
{
s_log.Publish(MessageLevel.Info, "A DataSet object has been disposed or garbage collected. It will be removed from the list.");
s_dataSetLookups.RemoveAt(index);
index--;
}
}
s_log.Publish(MessageLevel.Info, "Creating a lookup cache for a dataset");
target = new DataSourceLookupCache(dataSet);
s_dataSetLookups.Add(new WeakReference <DataSourceLookupCache>(target));
return(target);
}
}
/// <summary>
/// Gets/Creates the lookup cache for the provided dataset.
/// </summary>
/// <param name="dataSet">The non-null dataset provided by the time-series framework</param>
/// <returns>Lookup cache for the provided dataset.</returns>
public static DataSourceLookupCache GetLookupCache(DataSet dataSet)
{
if ((object)dataSet == null)
throw new ArgumentNullException(nameof(dataSet));
//Since adding datasets will be rare, the penalty associated with a lock on the entire
//set will be minor.
lock (s_dataSetLookups)
{
DataSourceLookupCache target;
for (int index = 0; index < s_dataSetLookups.Count; index++)
{
WeakReference<DataSourceLookupCache> item = s_dataSetLookups[index];
if (item.TryGetTarget(out target) && target.DataSet != null)
{
if (ReferenceEquals(target.DataSet, dataSet))
{
return target;
}
}
else
{
s_log.Publish(MessageLevel.Info, "A DataSet object has been disposed or garbage collected. It will be removed from the list.");
s_dataSetLookups.RemoveAt(index);
index--;
}
}
s_log.Publish(MessageLevel.Info, "Creating a lookup cache for a dataset");
target = new DataSourceLookupCache(dataSet);
s_dataSetLookups.Add(new WeakReference<DataSourceLookupCache>(target));
return target;
}
}
