public CastNode(NodeBase target) : base(target)
{
}
protected override NodeBase ReduceTerminalList(NodeBase node)
{
var values = node.GetTerminalValues <TIn>();
return(CreateTerminal(values.Cast <TOut>()));
}
protected override NodeBase ReduceTerminalList(NodeBase node)
{
return(Null);
}
protected NodeBase(NodeBase target)
{
this.Target = target;
}
protected abstract NodeBase ReduceTerminalItem(NodeBase node);
protected abstract NodeBase ReduceTerminalList(NodeBase node);
public DistinctNode(NodeBase target) : this(target, null)
{
}
public DistinctNode(NodeBase target, IEqualityComparer <TIn> equalityComparer)
: base(target)
{
this.equalityComparer = equalityComparer ?? EqualityComparer <TIn> .Default;
}
protected override NodeBase ReduceTerminalItem(NodeBase node)
{
var value = node.GetTerminalValue <TIn>();
return(value is TOut?CreateTerminal((TOut)(object)value) : Null);
}
public OfTypeNode(NodeBase target) : base(target)
{
}
protected override NodeBase ReduceTerminalList(NodeBase node)
{
var values = node.GetTerminalValues <TIn>();
return(CreateTerminal(values.Where(this.predicate)));
}
protected override NodeBase ReduceTerminalItem(NodeBase node)
{
var value = node.GetTerminalValue <TIn>();
return(this.predicate(value) ? CreateTerminal(value) : Null);
}
public WhereNode(NodeBase target, Func <TIn, bool> predicate) : base(target)
{
this.predicate = predicate;
}