private IQueryable <T> BuildQueryFromProviders <T>(IEnumerable <string> providerNames) where T : class, IData
{
if (providerNames == null)
{
providerNames = DataProviderRegistry.GetDataProviderNamesByInterfaceType(typeof(T));
}
var queries = new List <IQueryable <T> >();
foreach (string providerName in providerNames)
{
IQueryable <T> query = DataProviderPluginFacade.GetData <T>(providerName);
queries.Add(query);
}
bool resultIsCached = queries.Count == 1 && queries[0] is ICachedQuery;
if (resultIsCached)
{
return(queries[0]);
}
return(new DataFacadeQueryable <T>(queries));
}
public T GetDataFromDataSourceId <T>(DataSourceId dataSourceId, bool useCaching)
where T : class, IData
{
if (null == dataSourceId)
{
throw new ArgumentNullException("dataSourceId");
}
useCaching = useCaching && DataCachingFacade.IsTypeCacheable(typeof(T));
using (new DataScope(dataSourceId.DataScopeIdentifier, dataSourceId.LocaleScope))
{
T resultData = null;
string cacheKey = string.Empty;
if (useCaching)
{
cacheKey = dataSourceId.ToString();
resultData = (T)_dataBySourceIdCache.Get(cacheKey);
}
if (resultData == null)
{
resultData = DataProviderPluginFacade.GetData <T>(dataSourceId.ProviderName, dataSourceId.DataId);
if (useCaching && resultData != null && _dataBySourceIdCache.Enabled)
{
_dataBySourceIdCache.Add(cacheKey, resultData);
}
}
if (useCaching && resultData != null)
{
resultData = DataWrappingFacade.Wrap(resultData);
}
DataInterceptor dataInterceptor;
this.DataInterceptors.TryGetValue(typeof(T), out dataInterceptor);
if (dataInterceptor != null)
{
try
{
resultData = dataInterceptor.InterceptGetDataFromDataSourceId <T>(resultData);
}
catch (Exception ex)
{
Log.LogError(LogTitle, "Calling data interceptor failed with the following exception");
Log.LogError(LogTitle, ex);
}
}
return(resultData);
}
}
public T GetDataFromDataSourceId <T>(DataSourceId dataSourceId, bool useCaching)
where T : class, IData
{
Verify.ArgumentNotNull(dataSourceId, nameof(dataSourceId));
useCaching = useCaching && DataCachingFacade.IsTypeCacheable(typeof(T));
using (new DataScope(dataSourceId.DataScopeIdentifier, dataSourceId.LocaleScope))
{
T resultData = null;
string cacheKey = string.Empty;
if (useCaching)
{
cacheKey = dataSourceId.ToString();
resultData = (T)_dataBySourceIdCache.Get(cacheKey);
}
if (resultData == null)
{
resultData = DataProviderPluginFacade.GetData <T>(dataSourceId.ProviderName, dataSourceId.DataId);
if (useCaching && resultData != null && _dataBySourceIdCache.Enabled)
{
_dataBySourceIdCache.Add(cacheKey, resultData);
}
}
if (useCaching && resultData != null)
{
resultData = DataWrappingFacade.Wrap(resultData);
}
foreach (var dataInterceptor in GetDataInterceptors(typeof(T)))
{
try
{
resultData = dataInterceptor.InterceptGetDataFromDataSourceId <T>(resultData);
}
catch (Exception ex)
{
Log.LogError(LogTitle, ex);
}
}
return(resultData);
}
}
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);
}
