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// From class: Oatc.OpenMI.Examples.ModelComponents.SimpleRiver.Wrapper.SimpleRiverEngineWrapper : Oatc.OpenMI.Sdk.Wrapper.IEngine
	public void Initialize(System.Collections.Hashtable properties)
		{
			
			_inputExchangeItems = new ArrayList();
			_outputExchangeItems = new ArrayList();

			// -- Create and initialize the engine --
			_simpleRiverEngine = new SimpleRiverEngineDotNetAccess();
            if (properties["FilePath"].ToString().Length > 1)
            {
                _simpleRiverEngine.Initialize(properties["FilePath"].ToString());
            }
            else
            {
                string currentDir = System.IO.Directory.GetCurrentDirectory();
                _simpleRiverEngine.Initialize(currentDir);
                //When running from the GUI, the assembly is started with the current dir
                //to the location of the OMI files. It is assumed that the data files are
                //located in the same directory.
            }
			// -- Time horizon --
			char [] delimiter = new char[]{'-',' ',':'};
			string[] strings = _simpleRiverEngine.GetSimulationStartDate().Split(delimiter);
			int StartYear   = Convert.ToInt32(strings[0]);
			int StartMonth  = Convert.ToInt32(strings[1]);
			int StartDay    = Convert.ToInt32(strings[2]);
			int StartHour   = Convert.ToInt32(strings[3]);
			int StartMinute = Convert.ToInt32(strings[4]);
			int StartSecond = Convert.ToInt32(strings[5]);
			DateTime startDate = new DateTime(StartYear,StartMonth,StartDay,StartHour,StartMinute,StartSecond);
			_simulationStartTime = Oatc.OpenMI.Sdk.DevelopmentSupport.CalendarConverter.Gregorian2ModifiedJulian(startDate);

			// -- Build exchange items ---
			Dimension flowDimension = new Dimension();
			Unit flowUnit = new Unit("m3/sec",1,0,"m3/sec");
			
			Quantity flowQuantity   = new Quantity(flowUnit,"description","Flow",global::OpenMI.Standard.ValueType.Scalar,flowDimension);
			Quantity inFlowQuantity = new Quantity(flowUnit,"description","InFlow",global::OpenMI.Standard.ValueType.Scalar,flowDimension);

			int numberOfNodes = _simpleRiverEngine.GetNumberOfNodes();

			for (int i = 0; i < numberOfNodes -1; i++)
			{
				OutputExchangeItem flowFromBrach  = new OutputExchangeItem();
				InputExchangeItem inFlowToBranch = new InputExchangeItem();

				ElementSet branch = new ElementSet("description","Branch:" + i.ToString(),ElementType.XYPolyLine,new SpatialReference("ref"));
                branch.AddElement(new Element("Branch:" + i.ToString()));
				branch.Elements[0].AddVertex(new Vertex(_simpleRiverEngine.GetXCoordinate(i),_simpleRiverEngine.GetYCoordinate(i),0));
				branch.Elements[0].AddVertex(new Vertex(_simpleRiverEngine.GetXCoordinate(i+1),_simpleRiverEngine.GetYCoordinate(i+1),0));
			
				flowFromBrach.ElementSet = branch;
				flowFromBrach.Quantity = flowQuantity;

				inFlowToBranch.ElementSet = branch;
				inFlowToBranch.Quantity = inFlowQuantity;
		
				_outputExchangeItems.Add(flowFromBrach);
				_inputExchangeItems.Add(inFlowToBranch);
		    }
			for (int i = 0; i < numberOfNodes; i++)
			{
				InputExchangeItem inflowToNode = new InputExchangeItem();
				ElementSet node = new ElementSet("description","Node:" + i.ToString(),ElementType.IDBased,new SpatialReference("ref"));
				node.AddElement(new Element("Node:" + i.ToString()));

				inflowToNode.Quantity = inFlowQuantity;
				inflowToNode.ElementSet = node;

				_inputExchangeItems.Add(inflowToNode);
			}

			ElementSet Branches = new ElementSet("description","AllBranches",ElementType.XYPolyLine,new SpatialReference("ref"));
			for (int i = 0; i < numberOfNodes - 1;i++)
			{
				Element branch = new Element("Branch: " + i.ToString());
				branch.AddVertex(new Vertex(_simpleRiverEngine.GetXCoordinate(i),_simpleRiverEngine.GetYCoordinate(i),0));
				branch.AddVertex(new Vertex(_simpleRiverEngine.GetXCoordinate(i+1),_simpleRiverEngine.GetYCoordinate(i+1),0));
				Branches.AddElement(branch);
			}
			InputExchangeItem inFlowToBraches    = new InputExchangeItem();

			inFlowToBraches.ElementSet = Branches;
			inFlowToBraches.Quantity = inFlowQuantity;
			_inputExchangeItems.Add(inFlowToBraches);

		}