/// <summary>
/// Finds objects matching filter conditions in <paramref name="Where"/>.
/// </summary>
/// <param name="Offset">Offset at which to return elements.</param>
/// <param name="Top">Maximum number of elements to return.</param>
/// <param name="Where">Filter conditions.</param>
/// <param name="Variables">Current set of variables.</param>
/// <param name="Order">Order at which to order the result set.</param>
/// <param name="Node">Script node performing the evaluation.</param>
/// <returns>Enumerator.</returns>
public async Task <IResultSetEnumerator> Find(int Offset, int Top, ScriptNode Where, Variables Variables,
KeyValuePair <VariableReference, bool>[] Order, ScriptNode Node)
{
object[] FindParameters = new object[] { Offset, Top, Convert(Where, Variables, this.Name), Convert(Order) };
object Obj = FindMethod.MakeGenericMethod(this.type).Invoke(null, FindParameters);
if (!(Obj is Task Task))
{
throw new ScriptRuntimeException("Unexpected response.", Node);
}
await Task;
PropertyInfo PI = Task.GetType().GetRuntimeProperty("Result");
if (PI is null)
{
throw new ScriptRuntimeException("Unexpected response.", Node);
}
Obj = PI.GetValue(Task);
if (!(Obj is IEnumerable Enumerable))
{
throw new ScriptRuntimeException("Unexpected response.", Node);
}
return(new SynchEnumerator(Enumerable.GetEnumerator()));
}
internal static IEnumerator Find(Type T, int Offset, int Top, ScriptNode Where, Variables Variables, string[] Order, ScriptNode Node)
{
object[] FindParameters = new object[] { Offset, Top, Convert(Where, Variables), Order };
object Obj = FindMethod.MakeGenericMethod(T).Invoke(null, FindParameters);
if (!(Obj is Task Task))
{
throw new ScriptRuntimeException("Unexpected response.", Node);
}
PropertyInfo PI = Task.GetType().GetRuntimeProperty("Result");
if (PI == null)
{
throw new ScriptRuntimeException("Unexpected response.", Node);
}
Obj = PI.GetValue(Task);
if (!(Obj is IEnumerable Enumerable))
{
throw new ScriptRuntimeException("Unexpected response.", Node);
}
return(Enumerable.GetEnumerator());
}
