public IQueryable <T> GetData <T>(bool useCaching, IEnumerable <string> providerNames)
where T : class, IData
{
IQueryable <T> resultQueryable;
if (DataProviderRegistry.AllInterfaces.Contains(typeof(T)))
{
if (useCaching &&
providerNames == null &&
DataCachingFacade.IsDataAccessCacheEnabled(typeof(T)))
{
resultQueryable = DataCachingFacade.GetDataFromCache <T>(
() => BuildQueryFromProviders <T>(null));
}
else
{
resultQueryable = BuildQueryFromProviders <T>(providerNames);
}
}
else
{
DataProviderRegistry.CheckInitializationErrors(typeof(T));
if (!typeof(T).GetCustomInterfaceAttributes <AutoUpdatebleAttribute>().Any())
{
throw new ArgumentException($"The given interface type ({typeof (T)}) is not supported by any data providers");
}
resultQueryable = new List <T>().AsQueryable();
}
foreach (var dataInterceptor in GetDataInterceptors(typeof(T)))
{
try
{
resultQueryable = dataInterceptor.InterceptGetData <T>(resultQueryable);
}
catch (Exception ex)
{
Log.LogError(LogTitle, ex);
}
}
return(resultQueryable);
}
public IQueryable <T> GetData <T>(bool useCaching, IEnumerable <string> providerNames)
where T : class, IData
{
IQueryable <T> resultQueryable;
if (DataProviderRegistry.AllInterfaces.Contains(typeof(T)))
{
if (useCaching && DataCachingFacade.IsDataAccessCacheEnabled(typeof(T)))
{
resultQueryable = DataCachingFacade.GetDataFromCache <T>();
}
else
{
if (providerNames == null)
{
providerNames = DataProviderRegistry.GetDataProviderNamesByInterfaceType(typeof(T));
}
List <IQueryable <T> > queryables = new List <IQueryable <T> >();
foreach (string providerName in providerNames)
{
IQueryable <T> queryable = DataProviderPluginFacade.GetData <T>(providerName);
queryables.Add(queryable);
}
bool resultIsCached = queryables.Count == 1 && queryables[0] is ICachedQuery;
if (resultIsCached)
{
resultQueryable = queryables[0];
}
else
{
var multipleSourceQueryable = new DataFacadeQueryable <T>(queryables);
resultQueryable = multipleSourceQueryable;
}
}
}
else
{
DataProviderRegistry.CheckInitializationErrors(typeof(T));
if (!typeof(T).GetCustomInterfaceAttributes <AutoUpdatebleAttribute>().Any())
{
throw new ArgumentException(string.Format("The given interface type ({0}) is not supported by any data providers", typeof(T)));
}
resultQueryable = new List <T>().AsQueryable();
}
DataInterceptor dataInterceptor;
this.DataInterceptors.TryGetValue(typeof(T), out dataInterceptor);
if (dataInterceptor != null)
{
try
{
resultQueryable = dataInterceptor.InterceptGetData <T>(resultQueryable);
}
catch (Exception ex)
{
Log.LogError(LogTitle, "Calling data interceptor failed with the following exception");
Log.LogError(LogTitle, ex);
}
}
return(resultQueryable);
}