/// <summary>
/// Reads a compressed byte array from this stream.
/// </summary>
/// <param name="stream">The stream to read from.</param>
/// <param name="validityCheck">Set this parameter <c>true</c> if there is a check code before the array to detect data corruption; otherwise, set this <c>false</c>.</param>
/// <returns>
/// The byte array read from the stream.
/// </returns>
/// <exception cref="System.IO.InvalidDataException">Raises if data in the stream is corrupted.</exception>
public static byte[] ReadCompressedByteArray(this Stream stream, bool validityCheck = false)
{
var data = stream.ReadByteArray();
if (data.IsNullOrEmpty())
{
return(null);
}
using (var ms = new MemoryStream(data))
using (var cms = new GZipStream(ms, CompressionMode.Decompress))
return(cms.ReadByteArray(validityCheck));
}
/// <summary>
/// Reads objects from this stream and stores them in a list.
/// </summary>
/// <param name="stream">A <see cref="System.IO.Stream"/>.</param>
/// <param name="list">A list used to store the objects.</param>
/// <param name="converter">A delegate used to convert the read bytes to the desired object.</param>
/// <param name="validityCheck">Indicates whether to read a countersign from the stream and perform the validity check.</param>
public static void ReadObjects <T>(this Stream stream,
IList <T> list, BytesToObjectConverter <T> converter, bool validityCheck = true)
{
var pos = stream.Position;
if (!validityCheck || stream.Check((Int64)29))
{
while (true)
{
var len = stream.ReadInt32();
if (len < 0)
{
stream.SeekTo(pos);
throw new InvalidDataException(IOResources.ERR_StreamExtension_DataIrrecognizable);
}
var occupancy = stream.ReadInt32();
if (occupancy < 0)
{
stream.SeekTo(pos);
throw new InvalidDataException(IOResources.ERR_StreamExtension_DataIrrecognizable);
}
var next = stream.ReadInt64();
while (occupancy > 0)
{
var p1 = stream.Position;
var b = stream.ReadByteArray(validityCheck);
var advance = stream.Position - p1;
occupancy -= (int)advance;
list.Add(converter(b));
}
if (next <= 0)
{
break;
}
else
{
stream.SeekTo(next);
}
}
}
else
{
throw new InvalidDataException(IOResources.ERR_StreamExtension_DataIrrecognizable);
}
}
/// <summary>
/// Reads a <see cref="System.Key"/> from this stream.
/// </summary>
/// <param name="stream">The stream to read.</param>
/// <returns>A <see cref="System.Key"/> read from the stream.</returns>
public static Key ReadKey(this Stream stream)
{
return(new Key(stream.ReadByteArray(), false));
}
public static object ReadObject <T>(this Stream stream, BytesToObjectConverter <T> converter, bool validityCheck = true)
{
return(converter(stream.ReadByteArray(validityCheck)));
}
public static object ReadObject(this Stream stream)
{
var type = (CommonTypeStreamCode)stream.ReadByte();
switch (type)
{
case CommonTypeStreamCode.String:
return(stream.ReadString());
case CommonTypeStreamCode.Int32:
return(stream.ReadInt32());
case CommonTypeStreamCode.Int64:
return(stream.ReadInt64());
case CommonTypeStreamCode.UInt32:
return(stream.ReadUInt32());
case CommonTypeStreamCode.UInt64:
return(stream.ReadUInt64());
case CommonTypeStreamCode.Byte:
return(stream.ReadByte());
case CommonTypeStreamCode.DateTime:
return(stream.ReadDateTime());
case CommonTypeStreamCode.Int16:
return(stream.ReadInt16());
case CommonTypeStreamCode.UInt16:
return(stream.ReadUInt16());
case CommonTypeStreamCode.Single:
return(stream.ReadSingle());
case CommonTypeStreamCode.Double:
return(stream.ReadDouble());
case CommonTypeStreamCode.SByte:
return(stream.ReadSByte());
case CommonTypeStreamCode.ByteArray:
return(stream.ReadByteArray());
case CommonTypeStreamCode.Int32Array:
return(stream.ReadInt32Array(false));
case CommonTypeStreamCode.Int32List:
return(new List <int>(stream.ReadInt32Array(false)));
case CommonTypeStreamCode._glist:
{
var glistType = Type.GetType(stream.ReadString());
var glist = (IList)Activator.CreateInstance(glistType);
var count = stream.ReadInt32();
var fieldCount = stream.ReadUInt16();
var propertyCount = stream.ReadUInt16();
var objType = glistType.GetGenericArguments()[0];
var fields = new FieldInfo[fieldCount];
var properties = new PropertyInfo[propertyCount];
for (var i = 0; i < fieldCount; ++i)
{
fields[i] = objType.GetField(stream.ReadString());
}
for (var i = 0; i < propertyCount; ++i)
{
properties[i] = objType.GetProperty(stream.ReadString());
}
for (var i = 0; i < count; ++i)
{
glist.Add(_innerReadObject(stream, objType, fields, properties));
}
return(glist);
}
default:
{
var objName = stream.ReadString();
var fieldCount = stream.ReadUInt16();
var objType = Assembly.GetExecutingAssembly().GetType(objName);
var obj = Activator.CreateInstance(objType);
for (var i = 0; i < fieldCount; ++i)
{
objType.GetField(stream.ReadString()).SetValue(obj, stream.ReadObject());
}
return(obj);
}
}
}
