public virtual IEnumerable <IRow> Read()
{
if (Valid)
{
Context.Debug(() => $"Running {Transformers.Count} transforms.");
if (Context.Entity.NeedsUpdate())
{
if (Context.Entity.Version != string.Empty)
{
if (Context.Entity.GetVersionField().Type == "byte[]")
{
var min = Context.Entity.MinVersion == null ? "null" : Utility.BytesToHexString((byte[])Context.Entity.MinVersion).TrimStart(new[] { '0' });
var max = Context.Entity.MaxVersion == null ? "null" : Utility.BytesToHexString((byte[])Context.Entity.MaxVersion).TrimStart(new[] { '0' });
Context.Info("Change Detected: Input:0x{0:X} != Output:0x{1:X}", max, min);
}
else
{
Context.Info("Change Detected: Input:{0} > Output:{1}", Context.Entity.MaxVersion, Context.Entity.MinVersion);
}
}
return(Transformers.Aggregate(Reader.Read(), (current, transformer) => transformer.Transform(current)));
}
Context.Info("Change Detected: No.");
}
return(Enumerable.Empty <IRow>());
}