//======================================================
// Public methods
//======================================================
/// <summary>
/// Instanciates a new process step from a deserialized description.
/// </summary>
/// <param name="data">The data describing the process step.</param>
/// <returns>The instanciated process step, or null if an error occured.</returns>
public static ProcessStep Instanciate(ProcessStepInstanceData data)
{
if (data == null)
{
throw new ArgumentNullException(nameof(data));
}
// Check the runtime type for validity
var definition = data?.Definition;
var runtimeType = definition?.RuntimeType;
if (runtimeType == null)
{
return(null);
}
// Try instanciating an instance of the runtime state
ProcessStep step = null;
try
{
step = Activator.CreateInstance(runtimeType) as ProcessStep;
}
catch
{
return(null);
}
// Set the parameters
step.Id = data.Id;
step.Definition = definition;
foreach (var parameterKvp in data.ParameterValues)
{
try
{
Util.SetMemberValue(step, parameterKvp.Key, parameterKvp.Value);
}
catch { }
}
return(step);
}
private static ProcessInstanceData LoadProcessDescriptionFromDatabase()
{
// Configure the transport process
// This configuration should be done in the UI and only loaded from the database/file at this point.
// No logic is contained in these classes, pure data level.
// The setup is only meant to show the usage of the classes.
var data = new ProcessInstanceData();
data.Name = "My transport process";
ProcessStepInstanceData dataA, dataB;
data.Steps.Add(dataA = new ProcessStepInstanceData()
{
Id = 1, DefinitionName = "WaitStep"
});
dataA.ParameterValues["Duration"] = 12.0;
data.Steps.Add(dataB = new ProcessStepInstanceData()
{
Id = 2, DefinitionName = "DeliverStepDummy"
});
data.InitialStateId = dataA.Id;
data.Edges.Add(new EdgeData()
{
SourceId = dataA.Id, DestinationId = dataB.Id, SourceExit = ExitPointDefinition.Default.Name
});
data.Edges.Add(new EdgeData()
{
SourceId = dataB.Id, DestinationId = dataA.Id, SourceExit = "Done"
});
data.Edges.Add(new EdgeData()
{
SourceId = dataB.Id, DestinationId = dataB.Id, SourceExit = "Failed"
});
return(data);
}