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

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#region Using Directives and Copyright Notice

// Copyright (c) 2007-2010, Computer Consultancy Pty Ltd
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       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" 
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
// ARE DISCLAIMED. IN NO EVENT SHALL COMPUTER CONSULTANCY PTY LTD BE LIABLE 
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
// DAMAGE.

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());
        }
    }
}
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