public ValueTask <System.Int64> LongCountAsync(QueryAdapterBase queryAdapter, IQueryable source, CancellationToken cancellation)
{
if (source is not IQueryable <T> typedQueryable)
{
typedQueryable = source.Cast <T>();
}
return(queryAdapter.LongCountAsync(typedQueryable, cancellation));
}
public AsyncTypeAwaitable MaxAsync(QueryAdapterBase queryAdapter, IQueryable source, CancellationToken cancellation)
{
if (source is not IQueryable <T> typedQueryable)
{
typedQueryable = source.Cast <T>();
}
var task = queryAdapter.MaxAsync(typedQueryable, cancellation);
return(task.AsTypeAwaitable());
}
public AsyncQueryProvider(QueryAdapterBase queryAdapter, MethodProcessor methodProcessor)
{
if (queryAdapter is null)
{
throw new ArgumentNullException(nameof(queryAdapter));
}
if (methodProcessor is null)
{
throw new ArgumentNullException(nameof(methodProcessor));
}
QueryAdapter = queryAdapter;
_methodProcessor = methodProcessor;
}
public ValueTask <System.Int64> LongCountAsync(QueryAdapterBase queryAdapter, IQueryable source, Expression predicate, CancellationToken cancellation)
{
if (source is not IQueryable <T> typedQueryable)
{
typedQueryable = source.Cast <T>();
}
if (predicate is UnaryExpression unaryExpression && unaryExpression.NodeType == ExpressionType.Quote)
{
predicate = unaryExpression.Operand;
}
// TODO: Can we convert the selector if it is not of the appropriate type?
return(queryAdapter.LongCountAsync(typedQueryable, (Expression <Func <T, bool> >)predicate, cancellation));
}
public AsyncTypeAwaitable SingleOrDefaultAsync(
QueryAdapterBase queryAdapter,
IQueryable source,
Expression predicate,
CancellationToken cancellation)
{
if (source is not IQueryable <T> typedQueryable)
{
typedQueryable = source.Cast <T>();
}
if (predicate is UnaryExpression unaryExpression && unaryExpression.NodeType == ExpressionType.Quote)
{
predicate = unaryExpression.Operand;
}
// TODO: Can we convert the selector if it is not of the appropriate type?
var task = queryAdapter.SingleOrDefaultAsync(typedQueryable, (Expression <Func <T, bool> >)predicate, cancellation);
return(task.AsTypeAwaitable());
}
public static AsyncQueryable <T> Create <T>(QueryAdapterBase queryAdapter, MethodProcessor methodProcessor)
{
return(new AsyncQueryable <T>(queryAdapter, methodProcessor));
}