/// <summary>
/// Evaluates the node asynchronously, using the variables provided in
/// the <paramref name="Variables"/> collection.
/// </summary>
/// <param name="Variables">Variables collection.</param>
/// <returns>Result.</returns>
public async Task <IElement> EvaluateAsync(Variables Variables)
{
IDataSource Source = this.source.GetSource(Variables);
IResultSetEnumerator e = await Source.Find(0, int.MaxValue, this.where, Variables, new KeyValuePair <VariableReference, bool> [0], this);
LinkedList <object> ToUpdate = new LinkedList <object>();
int Count = 0;
while (await e.MoveNextAsync())
{
if (this.properties is null)
{
this.properties = new ObjectProperties(e.Current, Variables, false);
}
else
{
this.properties.Object = e.Current;
}
foreach (Assignment SetOperation in this.setOperations)
{
SetOperation.Evaluate(this.properties);
}
ToUpdate.AddLast(e.Current);
Count++;
}
await Source.Update(ToUpdate);
return(new DoubleNumber(Count));
}
/// <summary>
/// Evaluates the node, using the variables provided in the <paramref name="Variables"/> collection.
/// </summary>
/// <param name="Variables">Variables collection.</param>
/// <returns>Result.</returns>
public override IElement Evaluate(Variables Variables)
{
IElement E = this.source.Evaluate(Variables);
if (!(E.AssociatedObjectValue is Type T))
{
throw new ScriptRuntimeException("Type expected.", this.source);
}
IEnumerator e = Select.Find(T, 0, int.MaxValue, this.where, Variables, new string[0], this);
LinkedList <object> ToUpdate = new LinkedList <object>();
int Count = 0;
while (e.MoveNext())
{
ObjectProperties Properties = new ObjectProperties(e.Current, Variables, false);
foreach (Assignment SetOperation in this.setOperations)
{
SetOperation.Evaluate(Properties);
}
ToUpdate.AddLast(e.Current);
Count++;
}
Database.Update(ToUpdate);
return(new DoubleNumber(Count));
}