ln.types/odb/ODBFileStorage.cs

// /**
//  * 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 Castle.DynamicProxy;
using ln.types.serialize;
using Castle.Components.DictionaryAdapter;
using System.Linq;
using System.Reflection;
namespace ln.types.odb
{
    //public class ODBFileStorage : Storage
    //{
    //    public String BasePath { get; set; }
    //    public int StorageVersion { get; } = 0x01;

    //    public ODBFileStorage(string basePath)
    //    {
    //        BasePath = Path.GetFullPath(basePath);
    //        if (!Directory.Exists(BasePath))
    //        {
    //            Directory.CreateDirectory(BasePath);
    //        }
    //    }

    //    private string GetPersistentPath(Guid persistenceID)
    //    {
    //        byte[] idBytes = persistenceID.ToByteArray();
    //        return Path.Combine(BasePath, BitConverter.ToString(idBytes, 0, 4));
    //    }



    //    public override bool Contains(Guid persistenceID)
    //    {
    //        string fn = Path.Combine(GetPersistentPath(persistenceID), String.Format("{0}.0", persistenceID));
    //        return File.Exists(fn);
    //    }

    //    public override bool Store(PreparedObject preparedObject)
    //    {
    //        string targetPath = GetPersistentPath(preparedObject.PersistenceID);
    //        String fnbase = Path.Combine(targetPath, preparedObject.PersistenceID.ToString());

    //        if (!Directory.Exists(targetPath))
    //            Directory.CreateDirectory(targetPath);

    //        String fnn = String.Format("{0}.new", fnbase);

    //        if (File.Exists(fnn))
    //            File.Delete(fnn);

    //        using (FileStream fs = new FileStream(fnn, FileMode.CreateNew))
    //        {
    //            ToStream(preparedObject, fs);
    //            fs.Close();
    //        }

    //        for (int n = 5; n > 0; n--)
    //        {
    //            string fn1 = String.Format("{0}.{1}", fnbase, n - 1);
    //            string fn2 = String.Format("{0}.{1}", fnbase, n);

    //            if (File.Exists(fn1))
    //            {
    //                if (File.Exists(fn2))
    //                    File.Delete(fn2);

    //                File.Move(fn1, fn2);
    //            }
    //        }

    //        string fn = String.Format("{0}.{1}", fnbase, 0);
    //        File.Move(fnn, fn);

    //        return true;
    //    }

    

    //    public override bool Load(PreparedObject preparedObject)
    //    {
    //        string targetPath = GetPersistentPath(preparedObject.PersistenceID);
    //        String fnbase = Path.Combine(targetPath, preparedObject.PersistenceID.ToString());
    //        string fn = String.Format("{0}.0", fnbase);

    //        using (FileStream fs = new FileStream(fn, FileMode.Open))
    //        {
    //            FromStream(fs, preparedObject);
    //            fs.Close();
    //        }
    //        return true;
    //    }

    //    private void ToStream(PreparedObject preparedObject,Stream stream)
    //    {
    //        using (BinaryWriter writer = new BinaryWriter(stream))
    //        {
    //            writer.Write(StorageVersion);
    //            writer.Write(DateTimeOffset.Now.ToUnixTimeMilliseconds());
    //            writer.Write(preparedObject.PreparedType.Assembly.GetName().Name);
    //            writer.Write(preparedObject.PreparedType.FullName);

    //            string[] fieldNames = preparedObject.StoredFieldNames;

    //            writer.Write(fieldNames.Length);
    //            foreach (String fieldName in fieldNames)
    //            {
    //                byte[] fieldBytes = preparedObject.GetFieldBytes(fieldName);
    //                writer.Write(fieldName);
    //                writer.Write(fieldBytes.Length);
    //                writer.Write(fieldBytes);
    //            }

    //            writer.Close();
    //        }
    //    }

    //    private void FromStream(Stream stream,PreparedObject preparedObject)
    //    {
    //        using (BinaryReader reader = new BinaryReader(stream))
    //        {
    //            if (reader.ReadInt32() != StorageVersion)
    //                throw new FormatException("Unsupported Storage Version");

    //            DateTime timestamp = DateTimeOffset.FromUnixTimeMilliseconds(reader.ReadInt64()).DateTime;

    //            string assemblyName = reader.ReadString();
    //            string typeName = reader.ReadString();

    //            Assembly assembly = Assembly.Load(assemblyName);
    //            Type targetType = assembly.GetType(typeName);

    //            preparedObject.ReConfigure(targetType,timestamp);

    //            int nStoredFields = reader.ReadInt32();

    //            for (int n = 0; n < nStoredFields; n++)
    //            {
    //                string fieldName = reader.ReadString();
    //                int nBytes = reader.ReadInt32();
    //                byte[] fieldBytes = reader.ReadBytes(nBytes);
    //                preparedObject.SetFieldBytes(fieldName, fieldBytes);
    //            }

    //            reader.Close();
    //        }
    //    }

    //}
}