/// <summary>
/// Reads the value of a Property inside a object instance.
/// </summary>
/// <param name="ms"></param>
/// <param name="binary"></param>
/// <returns>A NdfValueWrapper Instance.</returns>
protected NdfValueWrapper ReadValue(Stream ms, NdfBinary binary)
{
uint contBufferlen;
NdfValueWrapper value;
var buffer = new byte[4];
ms.Read(buffer, 0, buffer.Length);
NdfType type = NdfTypeManager.GetType(buffer);
if (type == NdfType.Unknown)
throw new InvalidDataException("Unknown datatypes are not supported!");
if (type == NdfType.Reference)
{
ms.Read(buffer, 0, buffer.Length);
type = NdfTypeManager.GetType(buffer);
}
switch (type)
{
case NdfType.WideString:
case NdfType.List:
case NdfType.MapList:
case NdfType.Blob:
case NdfType.ZipBlob:
ms.Read(buffer, 0, buffer.Length);
contBufferlen = BitConverter.ToUInt32(buffer, 0);
if (type == NdfType.ZipBlob)
if (ms.ReadByte() != 1)
throw new InvalidDataException("has to be checked.");
break;
default:
contBufferlen = NdfTypeManager.SizeofType(type);
break;
}
switch (type)
{
case NdfType.MapList:
case NdfType.List:
NdfCollection lstValue = type == NdfType.List ? new NdfCollection() : new NdfMapList();
for (int i = 0; i < contBufferlen; i++)
{
CollectionItemValueHolder res;
if (type == NdfType.List)
res = new CollectionItemValueHolder(ReadValue(ms, binary), binary);
else
res = new CollectionItemValueHolder(
new NdfMap(
new MapValueHolder(ReadValue(ms, binary), binary),
new MapValueHolder(ReadValue(ms, binary), binary),
binary), binary);
lstValue.Add(res);
}
value = lstValue;
break;
case NdfType.Map:
value = new NdfMap(
new MapValueHolder(ReadValue(ms, binary), binary),
new MapValueHolder(ReadValue(ms, binary), binary),
binary);
break;
default:
var contBuffer = new byte[contBufferlen];
ms.Read(contBuffer, 0, contBuffer.Length);
value = NdfTypeManager.GetValue(contBuffer, type, binary);
break;
}
return value;
}
private NdfValueWrapper GetCopiedValue(IValueHolder toCopy)
{
NdfValueWrapper copiedValue = null;
switch (toCopy.Value.Type)
{
case NdfType.ObjectReference:
var origInst = toCopy.Value as NdfObjectReference;
if (origInst != null && !origInst.Instance.IsTopObject)
copiedValue = new NdfObjectReference(origInst.Class, CopyInstance(origInst.Instance).Id);
else
copiedValue = NdfTypeManager.GetValue(toCopy.Value.GetBytes(), toCopy.Value.Type, toCopy.Manager);
break;
case NdfType.List:
case NdfType.MapList:
var copiedItems = new List<CollectionItemValueHolder>();
var collection = toCopy.Value as NdfCollection;
if (collection != null)
copiedItems.AddRange(collection.Select(entry => new CollectionItemValueHolder(GetCopiedValue(entry), toCopy.Manager)));
copiedValue = new NdfCollection(copiedItems);
break;
case NdfType.Map:
var map = toCopy.Value as NdfMap;
if (map != null)
copiedValue = new NdfMap(new MapValueHolder(GetCopiedValue(map.Key), toCopy.Manager),
new MapValueHolder(GetCopiedValue(map.Value as IValueHolder), toCopy.Manager), toCopy.Manager);
break;
default:
copiedValue = NdfTypeManager.GetValue(toCopy.Value.GetBytes(), toCopy.Value.Type, toCopy.Manager);
break;
}
return copiedValue;
}