/// <summary>
/// Instances this instance.
/// </summary>
/// <returns></returns>
public static UrlBuilderProvider Instance()
{
// Use the cache because the reflection used later is expensive
Cache cache = HttpRuntime.Cache;
string cacheKey;
// Get the names of providers
ProviderConfiguration config = ProviderConfiguration.GetProviderConfiguration(providerType);
// Read specific configuration information for this provider
//ProviderSettings providerSettings = (ProviderSettings) config.Providers[config.DefaultProvider];
AppleseedProviderSettings providerSettings = (AppleseedProviderSettings)config.Providers[config.DefaultProvider];
// In the cache?
cacheKey = "Appleseed::Web::UrlBuilder::" + config.DefaultProvider;
if (cache[cacheKey] == null)
{
// The assembly should be in \bin or GAC, so we simply need
// to get an instance of the type
try
{
cache.Insert(cacheKey,
ProviderHelper.InstantiateProvider(providerSettings, typeof(UrlBuilderProvider)));
}
catch (Exception e)
{
throw new Exception("Unable to load provider", e);
}
}
return((UrlBuilderProvider)cache[cacheKey]);
}
/// <summary>
/// Instantiates the provider.
/// </summary>
/// <param name="providerSettings">
/// The Appleseed provider settings.
/// </param>
/// <param name="provType">
/// Type of the prov.
/// </param>
/// <returns>
/// A Provider Base.
/// </returns>
/// <remarks>
/// </remarks>
public static ProviderBase InstantiateProvider(AppleseedProviderSettings providerSettings, Type provType)
{
if (string.IsNullOrEmpty(providerSettings.Type))
{
throw new ConfigurationErrorsException(
"Provider could not be instantiated. The Type parameter cannot be null.");
}
var providerType = Type.GetType(providerSettings.Type);
if (providerType == null)
{
throw new ConfigurationErrorsException(
"Provider could not be instantiated. The Type could not be found.");
}
if (!provType.IsAssignableFrom(providerType))
{
throw new ConfigurationErrorsException("Provider must implement type \'" + provType + "\'.");
}
var providerObj = Activator.CreateInstance(providerType);
if (providerObj == null)
{
throw new ConfigurationErrorsException("Provider could not be instantiated.");
}
var providerBase = (ProviderBase)providerObj;
providerBase.Initialize(providerSettings.Name, providerSettings.Parameters);
return(providerBase);
}
