// Copyright 2010 ESRI
// 
// All rights reserved under the copyright laws of the United States
// and applicable international laws, treaties, and conventions.
// 
// You may freely redistribute and use this sample code, with or
// without modification, provided you include the original copyright
// notice and use restrictions.
// 
// See the use restrictions.
// 

namespace CustomExtCriteriaCS
{
  [System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.None)]
  [System.Runtime.InteropServices.Guid(PlantWithoutEquipment.GUID)]
  [System.Runtime.InteropServices.ProgId(PlantWithoutEquipment.PROGID)]
  public class PlantWithoutEquipment : ESRI.ArcGIS.Schematic.ISchematicNodeReductionExtended
  {
    public const string GUID = "08CABF7A-1CC8-4cc2-A950-67485A56F7BA";
    public const string PROGID = "CustomExtCriteriaCS.PlantWithoutEquipment";

    #region Component Category Registration
    [System.Runtime.InteropServices.ComRegisterFunction()]
    public static void Register(string regKey)
    {
      ESRI.ArcGIS.ADF.CATIDs.SchematicRulesExtendedCriteria.Register(regKey);
    }

    [System.Runtime.InteropServices.ComUnregisterFunction()]
    public static void Unregister(string regKey)
    {
      ESRI.ArcGIS.ADF.CATIDs.SchematicRulesExtendedCriteria.Unregister(regKey);
    }
    #endregion

    #region ISchematicNodeReductionExtended Implementations
    // Implementation of a new ISchematicNodeReductionExtended interface 
    // to be used as an additional criteria during the execution of a 
    // Node Reduction By Priority rule

    //  Description of the new schematic node reduction criteria
    public string Name
    {
      get
      {
        return "Reduce plant without equipments (C#)";
      }
    }

    //The SelectReduction procedure works with the input node schematic node candidate to the 
    //reduction and with the input linkElements list of schematic link elements incident to 
    //this schematic node.  It must return True for the output reduce boolean parameter if 
    //the node is reduced, false if the node is kept.   When the output ppLink schematic link 
    //is not nothing, it determines the target node that will be used to reconnect the links 
    //incidents to the reduced node.  In this sample procedure, the node candidate to the 
    //reduction is analyzed. If records related to this node exist in the plants_equipments table, 
    //the node is kept (output reduce parameter is False); else, it is reduced (output reduce 
    //parameter is True).

    public bool SelectReduction(ESRI.ArcGIS.Schematic.ISchematicInMemoryFeatureNode node, ESRI.ArcGIS.Schematic.IEnumSchematicInMemoryFeature enumLink, ref ESRI.ArcGIS.Schematic.ISchematicInMemoryFeatureLink link)
    {
      // if associated feature doesn't exist do nothing
      ESRI.ArcGIS.Schematic.ISchematicInMemoryFeature schemAssociatedNode;
      schemAssociatedNode = node as ESRI.ArcGIS.Schematic.ISchematicInMemoryFeature;
      if (schemAssociatedNode == null) return false;

      ESRI.ArcGIS.Geodatabase.IFeature plantsFeature;
      plantsFeature = schemAssociatedNode.SchematicElement as ESRI.ArcGIS.Geodatabase.IFeature;
      if (plantsFeature == null) return false;

      // if dataset is not plants do nothing
      ESRI.ArcGIS.Geodatabase.IDataset plantsDataset;
      plantsDataset = (ESRI.ArcGIS.Geodatabase.IDataset)plantsFeature.Class;
      if (plantsDataset.Name.IndexOf("plants") == 0) return false;

      // get workspace
      ESRI.ArcGIS.Geodatabase.IFeatureWorkspace plantsWorkspace;
      plantsWorkspace = (ESRI.ArcGIS.Geodatabase.IFeatureWorkspace)plantsDataset.Workspace;

      // open table plants_equipments
      ESRI.ArcGIS.Geodatabase.ITable plantsEquipment;
      plantsEquipment = plantsWorkspace.OpenTable("plants_equipments");
      if (plantsEquipment == null) return false;

      // filter for the selected feature
      ESRI.ArcGIS.Geodatabase.IQueryFilter plantsFilter;
      plantsFilter = new ESRI.ArcGIS.Geodatabase.QueryFilterClass();
      plantsFilter.WhereClause = ("PlantID = " + plantsFeature.OID);

      ESRI.ArcGIS.Geodatabase.ICursor plantsCursor;
      plantsCursor = plantsEquipment.Search(plantsFilter, true);

      // if found equipment return false
      if (plantsCursor != null && plantsCursor.NextRow() != null) return false;

      return true; // if this far
    }
    #endregion

  }
}