/// <summary>
/// Looks up a component in the pipeline
/// </summary>
/// <param name="stage">The stage the component is in</param>
/// <param name="index">The 0-based index inside the stage</param>
/// <returns>The component, or null if it was not found</returns>
public IBaseComponent GetComponent(ppStage stage, int index)
{
foreach (PStage st in _pipeline.Stages)
{
if (st.Id == stage.StageID)
{
IEnumerator enumerator = st.GetComponentEnumerator();
while (enumerator.MoveNext())
{
if (index-- == 0)
{
return((IBaseComponent)enumerator.Current);
}
}
}
}
return(null);
}
//
// Protected Methods
//
/// <summary>
/// Finds a stage in the pipeline
/// </summary>
/// <param name="stage">Stage definition</param>
/// <returns>The stage, if found, or a new stage if necessary</returns>
protected PStage FindStage(ppStage stage)
{
PStage theStage = null;
foreach (PStage pstage in _pipeline.Stages)
{
if (pstage.Id == stage.StageID)
{
theStage = pstage;
break;
}
}
if (theStage == null)
{
theStage = new PStage(stage.StageName, stage.ExecuteMethod, stage.StageID, _pipeline);
_pipeline.Stages.Add(theStage);
}
return(theStage);
}
/// <summary>
/// Adds a component to the specified stage
/// </summary>
/// <param name="component">Component to add to the stage</param>
/// <param name="stage">Stage to add it to</param>
public void AddComponent(IBaseComponent component, ppStage stage)
{
if (component == null)
{
throw new ArgumentNullException("component");
}
if (stage == null)
{
throw new ArgumentNullException("stage");
}
if (stage.IsReceiveStage != _isReceivePipeline)
{
throw new ArgumentException("Invalid Stage", "stage");
}
PStage theStage = FindStage(stage);
theStage.AddComponent(component);
}
/// <summary>
/// Applies the loaded configuration to a component
/// </summary>
/// <param name="stageId">The stage the component is in</param>
/// <param name="name">The component name</param>
/// <param name="index">The index of the component within the pipeline</param>
/// <param name="reader">The per-instance configuration</param>
private void ApplyComponentConfig(Guid stageId, string name, int index, XmlReader reader)
{
ppStage stage = ppStage.LookupStage(stageId);
IPersistPropertyBag component = GetComponent(stage, index)
as IPersistPropertyBag;
if (component != null)
{
String compName = component.GetType().FullName;
if (compName != name)
{
throw new InvalidOperationException(String.Format(
"Component in stage '{0}', index {1} is '{2}', expected '{3}'",
stage.StageName, index, compName, name));
}
IPropertyBag bag = new InstConfigPropertyBag(reader);
component.Load(bag, 1);
}
}
