/source/library/Interlace.UserInterface/Utilities/EntityGraphSearchingVisitor.cs

#region Using Directives and Copyright Notice



// Copyright (c) 2007-2010, Computer Consultancy Pty Ltd

// All rights reserved.

// 

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// modification, are permitted provided that the following conditions are met:

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//       notice, this list of conditions and the following disclaimer.

//     * Redistributions in binary form must reproduce the above copyright

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//       documentation and/or other materials provided with the distribution.

//     * Neither the name of the Computer Consultancy Pty Ltd nor the

//       names of its contributors may be used to endorse or promote products

//       derived from this software without specific prior written permission.

// 

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 

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using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Text;



using SD.LLBLGen.Pro.ORMSupportClasses;



using Interlace.Collections;



#endregion



namespace Interlace.Utilities

{

    public class EntityGraphSearchingVisitor : EntityGraphVisitor

    {

        public delegate bool Predicate(IEntity2 entity);



        Predicate _predicate;



        public EntityGraphSearchingVisitor(Type entityType, string propertyName, object propertyValue)

        {

            _predicate = delegate(IEntity2 entity)

            {

                if (!(entityType.IsAssignableFrom(entity.GetType()))) return false;



                return object.Equals(propertyValue, entity.Fields[propertyName].CurrentValue);

            };

        }



        public EntityGraphSearchingVisitor(Predicate predicate)

        {

            _predicate = predicate;

        }



        public override void VisitEntity(CactusStack<IEntity2> current)

        {

            if (!_predicate(current.Value)) return;



            int indent = 0;



            ReferenceLabeller labeller = new ReferenceLabeller();



            Console.WriteLine("Matching entity found:");



            StringBuilder builder = new StringBuilder();



            foreach (IEntity2 entity in current.Values)

            {

                EntityGraphPrintingVisitor.PrintCurrentEntity(builder, indent, entity, labeller, new string[] { });



                indent++;

            }



            Console.Write(builder.ToString());

        }

    }

}