/// <summary>
/// Reads the specified <paramref name="source"/>
/// </summary>
/// <param name="source">The source to be read</param>
/// <returns>An <see cref="IEnumerable{BaseData}"/> that contains the data in the source</returns>
public IEnumerable<BaseData> Read(SubscriptionDataSource source)
{
IStreamReader reader = null;
var instances = new BaseDataCollection();
try
{
switch (source.TransportMedium)
{
default:
case SubscriptionTransportMedium.Rest:
reader = new RestSubscriptionStreamReader(source.Source);
break;
case SubscriptionTransportMedium.LocalFile:
reader = new LocalFileSubscriptionStreamReader(source.Source);
break;
case SubscriptionTransportMedium.RemoteFile:
reader = new RemoteFileSubscriptionStreamReader(source.Source, Globals.Cache);
break;
}
var raw = "";
try
{
raw = reader.ReadLine();
var result = _factory.Reader(_config, raw, _date, _isLiveMode);
instances = result as BaseDataCollection;
if (instances == null)
{
OnInvalidSource(source, new Exception("Reader must generate a BaseDataCollection with the FileFormat.Collection"));
}
}
catch (Exception err)
{
OnReaderError(raw, err);
}
foreach (var instance in instances.Data)
{
yield return instance;
}
}
finally
{
if (reader != null)
reader.Dispose();
}
}
/// <summary>
/// Creates a new <see cref="IStreamReader"/> for the specified <paramref name="subscriptionDataSource"/>
/// </summary>
/// <param name="subscriptionDataSource">The source to produce an <see cref="IStreamReader"/> for</param>
/// <returns>A new instance of <see cref="IStreamReader"/> to read the source, or null if there was an error</returns>
private IStreamReader CreateStreamReader(SubscriptionDataSource subscriptionDataSource)
{
IStreamReader reader;
switch (subscriptionDataSource.TransportMedium)
{
case SubscriptionTransportMedium.LocalFile:
reader = HandleLocalFileSource(subscriptionDataSource);
break;
case SubscriptionTransportMedium.RemoteFile:
reader = HandleRemoteSourceFile(subscriptionDataSource);
break;
case SubscriptionTransportMedium.Rest:
reader = new RestSubscriptionStreamReader(subscriptionDataSource.Source);
break;
default:
throw new InvalidEnumArgumentException("Unexpected SubscriptionTransportMedium specified: " + subscriptionDataSource.TransportMedium);
}
return reader;
}
