// Copyright 2012 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.
// 

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using ESRI.ArcGIS.Schematic;
using ESRI.ArcGIS.Geodatabase;

namespace CustomExtCriteriaCS
{
  [ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.None)]
  [Guid(ExpandLinks.GUID)]
  [ProgId(ExpandLinks.PROGID)]
  public class ExpandLinks : ISchematicExpandLinksByAttributeExtended
  {
    public const string GUID = "F942BDC2-2AD4-47c4-B96D-A8CA0002E9B3";
    public const string PROGID = "CustomExtCriteriaCS.ExpandLinks";

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

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

    #region ISchematicExpandLinksByAttributeExtended Membres

    public string Evaluate(ISchematicInMemoryFeature schematicFeature)
    {
      if (schematicFeature.SchematicElementClass.SchematicElementType != esriSchematicElementType.esriSchematicLinkType) return "";

      ISchematicInMemoryFeatureLink schemLink;
      schemLink = (ISchematicInMemoryFeatureLink)schematicFeature;

      // Get From node
      ISchematicInMemoryFeatureNode schemFromNode;
      schemFromNode = schemLink.FromNode;

      // Get Associated feature
      ISchematicElementAssociatedObject scheAsso;
      scheAsso = (ISchematicElementAssociatedObject)schemFromNode.SchematicElement;

      IFeature esriFeature;
      esriFeature = (IFeature)scheAsso.AssociatedObject;

      // Get list of fields
      IFields esriFields;
      esriFields = esriFeature.Fields;
      int numField;
      // Find Field MaxOutLines
      numField = esriFields.FindFieldByAliasName("MaxOutLines");
      if (numField <= 0) return ""; // Field not found

      // Return value of the field
      return esriFeature.get_Value(numField).ToString();
    }

    public string Name
    {
      get { return "Use origin plant's MaxOutLines value (C#)"; }
    }

    #endregion
  }
}