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using System;

using System.Collections;

namespace EA_ReqPro

{

	/// <summary>

   /// This class is one derived from the EA_RecursionWorker base class so that

   /// an instance of it can be used as a parameter in the EA_Utilities.findAndProcessPackageElements

   /// method which recursively parses a given package. Thus, clients can parse EA model structure but

   /// specify their own functionality to be carried out on packages and elements found in the

   /// parsing.

   /// This particular derived class is designed to collect a list of element names from the

   /// package, from elements that have a type that is acceptable.

	/// </summary>

   public class EA_ElementAccumulator : EA_RecursionWorker

   {

      public ArrayList Elements = null;

      public ArrayList ElementIDs = null;

      private ArrayList validElementTypes = null;

      public EA_ElementAccumulator(ArrayList elementTypeList): base()

      {

         validElementTypes = elementTypeList;

         Elements = new ArrayList();

         ElementIDs = new ArrayList();

      }

      public override void processElement( EA.Element theElement )

      {

         if (validElementTypes.Contains( theElement.Type ))

         {

            Elements.Add( theElement );

            ElementIDs.Add( theElement.ElementID );

         }

      }

   }

}