// /**
//  * File: ListMapping.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 ln.types.odb.values;
using System.Collections;
using System.Linq;

namespace ln.types.odb
{
    public class ListMapping : IODBMapping
    {
        public Type TargetType { get; }

        public ListMapping(Type targetType)
        {
            TargetType = targetType;
        }

        public object UnmapValue(ODBMapper mapper,ODBValue oval)
        {
            ODBList list = oval as ODBList;

            if (TargetType.IsArray)
            {
                Array a = Array.CreateInstance(TargetType.GetElementType(), list.Count);
                for (int n = 0; n < list.Count; n++)
                    a.SetValue(list[n], n);
                return a;
            } else if (TargetType.GetInterfaces().Contains(typeof(IList)))
            {
                IList ilist = (IList)Activator.CreateInstance(TargetType, true);
                for (int n = 0; n < list.Count; n++)
                    ilist.Add(list[n]);
                return ilist;
            }

            throw new NotImplementedException();
        }

        public ODBValue MapValue(ODBMapper mapper,object value)
        {
            ODBList list = new ODBList();

            foreach (object item in (IEnumerable)value)
            {
                list.Add(ODBMapper.Default.MapValue(item));
            }

            return list;
        }
    }
}