IDictionary LoadProviders(ITypeResolutionService resolution)
{
if (Configuration.Arguments == null)
{
return(new System.Collections.Specialized.HybridDictionary(0));
}
try
{
// At most we will have a provider for each argument.
IDictionary providers = new System.Collections.Specialized.HybridDictionary(Configuration.Arguments.Length);
monitoredArguments = new System.Collections.Specialized.HybridDictionary(Configuration.Arguments.Length);
bool hasmonitors = false;
IValueInfoService mdservice = GetService <IValueInfoService>(true);
// Setup monitoring for dependent argument changes.
foreach (Config.Argument argument in Configuration.Arguments)
{
if (argument.ValueProvider != null)
{
IValueProvider provider = GetInstance <IValueProvider>(resolution, argument.ValueProvider.Type);
// Initialize the provider by passing the configuration for the argument it provides values to.
provider.Initialize(mdservice.GetInfo(argument.Name));
if (provider is IAttributesConfigurable)
{
Configure((IAttributesConfigurable)provider, argument.ValueProvider.AnyAttr);
}
providers.Add(argument.Name, provider);
// Site the provider so it can access all services.
if (provider is IComponent)
{
Add((IComponent)provider);
}
// Add to the argument-indexed list of providers monitoring arguments.
if (argument.ValueProvider.MonitorArgument != null)
{
hasmonitors = true;
foreach (Config.MonitorArgument monitored in argument.ValueProvider.MonitorArgument)
{
// Throw if the value provider is monitoring the same argument it's attached to.
if (monitored.Name == argument.Name)
{
throw new System.Configuration.ConfigurationException(String.Format(
System.Globalization.CultureInfo.CurrentCulture,
Properties.Resources.Recipe_ArgumentCantMonitorItself,
argument.ValueProvider.Type,
argument.Name));
}
ArrayList monitoringproviders = (ArrayList)monitoredArguments[monitored.Name];
if (monitoringproviders == null)
{
monitoringproviders = new ArrayList();
monitoredArguments[monitored.Name] = monitoringproviders;
}
monitoringproviders.Add(provider);
}
}
}
}
if (providers.Count != 0 && hasmonitors)
{
// Attach to change event if monitoring arguments.
IComponentChangeService changes = GetService <IComponentChangeService>(true);
changes.ComponentChanged += new ComponentChangedEventHandler(OnArgumentChanged);
}
return(providers);
}
catch (Exception ex)
{
throw new ValueProviderException(this.Configuration.Name,
Properties.Resources.Recipe_ValueProviderLoadFailed, ex);
}
}
