public WrappedQueryableProvider(System.Linq.IQueryProvider queryProvider)
{
if (queryProvider == null)
{
throw new ArgumentNullException(nameof(queryProvider));
}
InnerQueryProvider = queryProvider;
}
public QueryProvider(System.Linq.IQueryProvider sourceprovider)
{
SourceProvider = sourceprovider;
Factory = (provider, type, expr) =>
(IQueryable)Activator.CreateInstance(
typeof(Queryable <>).MakeGenericType(type),
this, expr);
}
private static ProviderType GetProviderType(this System.Linq.IQueryProvider provider)
{
if (Providers.TryGetValue(provider.GetType().Namespace, out var providerType))
{
return(providerType);
}
else
{
return(ProviderType.Unsupported);
}
}
private static IQueryableAsyncExecutor GetProviderExecutor(System.Linq.IQueryProvider provider)
{
if (Providers.TryGetValue(provider.GetType().Namespace, out var providerType))
{
if (providerType == ProviderType.LinqToDB)
{
return(new LinqToDBQueryableAsyncExecutor());
}
else
{
return(null);
}
}
else
{
return(null);
}
}
public QueryProvider(System.Linq.IQueryProvider sourceprovider, Func <IQueryProvider, Type, Expression, IQueryable> factory)
{
SourceProvider = sourceprovider;
Factory = factory;
}