/// <summary>
/// Creates the monitored item collection.
/// </summary>
/// <param name="configuredMeasurements">The configured measurements.</param>
/// <param name="opcRefreshRate">The OPC refresh rate in milliseconds.</param>
/// <returns>
/// The collection of monitored items. <see cref="MonitoredItems"/>.
/// </returns>
public MonitoredItems Create(ConfiguredMeasurements configuredMeasurements, int opcRefreshRate)
{
var monitoredItems = new MonitoredItems(opcRefreshRate);
// Loop on the configured measurements.
for (var i = 0; i < configuredMeasurements.Count; i++)
{
var configuredMeasurement = configuredMeasurements[i];
ProcessProperty(
configuredMeasurement.Quality, i, FieldTypes.Quality, monitoredItems);
ProcessProperty(
configuredMeasurement.Timestamp, i, FieldTypes.Timestamp, monitoredItems);
ProcessProperty(
configuredMeasurement.Unit, i, FieldTypes.Unit, monitoredItems);
ProcessProperty(
configuredMeasurement.Value, i, FieldTypes.Value, monitoredItems);
}
return(monitoredItems);
}
/// <summary>
/// Processes a property to see whether to add a monitored item.
/// </summary>
/// <param name="configuredMeasurementItem">The configured measurement item.</param>
/// <param name="index">The index.</param>
/// <param name="fieldType">The field Type.</param>
/// <param name="monitoredItems">The monitored items.</param>
private static void ProcessProperty(ConfiguredMeasurementItem configuredMeasurementItem, int index, FieldTypes fieldType, MonitoredItems monitoredItems)
{
// Continue only if it is a OPC mapping type.
if (configuredMeasurementItem.MappingType > 0)
{
string serverClass;
string itemId;
if (ParseItemDescriptor(configuredMeasurementItem.Value, out serverClass, out itemId))
{
monitoredItems.Add(
new MonitoredItemReference(index, fieldType, configuredMeasurementItem.MappingType),
serverClass,
itemId);
}
}
}
