ActivityNode.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Threading.Tasks;
using System.Xml;
using Waher.Content.Xml;
using Waher.Script;
 
namespace TAG.Simulator.ObjectModel.Activities
{
    public abstract class ActivityNode : SimulationNodeChildren, IActivityNode
    {
        private LinkedList<IActivityNode> activityNodes = null;
        private int count;
        private string id;
 
        public ActivityNode(ISimulationNode Parent, Model Model)
            : base(Parent, Model)
        {
        }
 
        public string Id => this.id;
 
        public override Task FromXml(XmlElement Definition)
        {
            this.id = XML.Attribute(Definition, "id");
 
            return base.FromXml(Definition);
        }
 
        public override Task Initialize()
        {
            if (this.Parent is IActivity Activity)
                Activity.Register(this);
            else if (this.Parent is IActivityNode ActivityNode)
                ActivityNode.Register(this);
 
            return base.Initialize();
        }
 
        public void Register(IActivityNode Node)
        {
            if (this.activityNodes is null)
                this.activityNodes = new LinkedList<IActivityNode>();
 
            this.Model.Register(this.activityNodes.AddLast(Node));
            this.count++;
        }
 
        protected LinkedListNode<IActivityNode> FirstNode => this.activityNodes?.First;
 
        protected int Count => this.count;
 
        public abstract Task<LinkedListNode<IActivityNode>> Execute(Variables Variables);
 
        public virtual void ExportPlantUml(StreamWriter Output, int Indentation, char QuoteChar)
        {
            if (!(this.activityNodes is null))
            {
                foreach (IActivityNode Node in this.activityNodes)
                    Node.ExportPlantUml(Output, Indentation, QuoteChar);
            }
        }
    }
}