// /**
//  * File: ODB.cs
//  * Author: haraldwolff
//  *
//  * This file and it's content is copyrighted by the Author and / or copyright holder.
//  * Any use wihtout proper permission is illegal and may lead to legal actions.
//  *
//  *
//  **/
using System;
using System.IO;
using System.Collections.Generic;
using ln.types.serialize;
using System.Linq;
namespace ln.types.odb
{
    class ODBObjectWriter : ObjectWriter
    {
        public IPersistent[] ReferencedPersistents => referencedPersistents.Values.ToArray();
        public Guid[] ReferencedPersistentIDs => referencedPersistents.Keys.ToArray();

        private Dictionary<Guid, IPersistent> referencedPersistents = new Dictionary<Guid, IPersistent>();

        public ODBObjectWriter(Stream stream)
            : base(stream)
        {}

        public override object QueryReference(object o)
        {
            if (o is IPersistent)
            {
                IPersistent persistent = o as IPersistent;
                Guid persistenceID = persistent.GetPersistenceID();

                if (!referencedPersistents.ContainsKey(persistenceID))
                    referencedPersistents.Add(persistenceID, persistent);

                return persistenceID;
            }
            return base.QueryReference(o);
        }
    }
}