public object ReadValue(StreamSegment current)
{
if (current == null)
{
throw new ArgumentNullException(nameof(current));
}
if (current.UnderlyingStream != UnderlyingStream)
{
throw new ArgumentException("Invalid argument.", nameof(current));
}
switch (current.ContentType)
{
case StreamSegmentType.Null:
return(null);
case StreamSegmentType.Integer:
return(ReadIntegerCore(current));
case StreamSegmentType.String:
return(ReadStringCore(current));
case StreamSegmentType.Binary:
return(ReadBinaryCore(current));
case StreamSegmentType.Dictionary:
return(ReadDictionaryCore(current));
case StreamSegmentType.Array:
return(ReadArrayCore(current));
default:
throw new InvalidDataException();
}
}
public StreamSegment ReadNext(StreamSegment current)
{
if (current == null)
{
throw new ArgumentNullException(nameof(current));
}
if (current.Next >= UnderlyingStream.Length)
{
return(null);
}
UnderlyingStream.Seek(current.Next, SeekOrigin.Begin);
return(ReadSegment());
}
private object[] ReadArrayCore(StreamSegment current)
{
UnderlyingStream.Seek(current.ContentStartOffset, SeekOrigin.Begin);
var indices = new int[current.ContentLength / 4];
for (int i = 0; i < indices.Length; i++)
{
indices[i] = _reader.ReadInt32();
}
var result = new object[current.ContentLength / 4];
for (int i = 0; i < indices.Length; i++)
{
result[i] = ReadValue(ReadSegment(indices[i]));
}
return(result);
}
public string ReadInteger(StreamSegment current)
{
if (current == null)
{
throw new ArgumentNullException(nameof(current));
}
if (current.UnderlyingStream != UnderlyingStream)
{
throw new ArgumentException("Invalid argument.", nameof(current));
}
switch (current.ContentType)
{
case StreamSegmentType.Integer:
return(ReadStringCore(current));
default:
throw new InvalidDataException();
}
}
private Dictionary <string, Lazy <object> > ReadDictionaryLazyCore(StreamSegment current)
{
UnderlyingStream.Seek(current.ContentStartOffset, SeekOrigin.Begin);
var indices = new int[current.ContentLength / 4];
for (int i = 0; i < indices.Length; i++)
{
indices[i] = _reader.ReadInt32();
}
var result = new Dictionary <string, Lazy <object> >();
for (int i = 0; i < indices.Length;)
{
var keySeg = ReadSegment(indices[i++]);
var valueSeg = ReadSegment(indices[i++]);
result[ReadString(keySeg)] = new Lazy <object>(() => ReadValue(valueSeg), false);
}
return(result);
}
public Dictionary <string, Lazy <object> > ReadDictionaryLazy(StreamSegment current)
{
if (current == null)
{
throw new ArgumentNullException(nameof(current));
}
if (current.UnderlyingStream != UnderlyingStream)
{
throw new ArgumentException("Invalid argument.", nameof(current));
}
switch (current.ContentType)
{
case StreamSegmentType.Null:
return(null);
case StreamSegmentType.Dictionary:
return(ReadDictionaryLazyCore(current));
default:
throw new InvalidDataException();
}
}
public object[] ReadArray(StreamSegment current)
{
if (current == null)
{
throw new ArgumentNullException(nameof(current));
}
if (current.UnderlyingStream != UnderlyingStream)
{
throw new ArgumentException("Invalid argument.", nameof(current));
}
switch (current.ContentType)
{
case StreamSegmentType.Null:
return(null);
case StreamSegmentType.Array:
return(ReadArrayCore(current));
default:
throw new InvalidDataException();
}
}
public Stream ReadBinaryAsStream(StreamSegment current)
{
if (current == null)
{
throw new ArgumentNullException(nameof(current));
}
if (current.UnderlyingStream != UnderlyingStream)
{
throw new ArgumentException("Invalid argument.", nameof(current));
}
switch (current.ContentType)
{
case StreamSegmentType.Null:
return(Stream.Null);
case StreamSegmentType.Binary:
// todo : use underlying stream later.
return(new MemoryStream(ReadBinaryCore(current)));
default:
throw new InvalidDataException();
}
}
private byte[] ReadBinaryCore(StreamSegment current)
{
UnderlyingStream.Seek(current.ContentStartOffset, SeekOrigin.Begin);
return(_reader.ReadBytes(current.ContentLength));
}
private string ReadStringCore(StreamSegment current)
{
UnderlyingStream.Seek(current.ContentStartOffset, SeekOrigin.Begin);
return(_reader.ReadString());
}
private int ReadIntegerCore(StreamSegment current)
{
UnderlyingStream.Seek(current.ContentStartOffset, SeekOrigin.Begin);
return(_reader.ReadInt32());
}
