/// <summary>
/// Loads a <see cref="DatabaseInfo"/> from stream.
/// </summary>
/// <param name="stream"></param>
public DatabaseInfo(BinaryStreamBase stream)
{
byte version = stream.ReadUInt8();
switch (version)
{
case 1:
DatabaseName = stream.ReadString();
KeyTypeID = stream.ReadGuid();
ValueTypeID = stream.ReadGuid();
int count = stream.ReadInt32();
EncodingDefinition[] definitions = new EncodingDefinition[count];
for (int x = 0; x < count; x++)
{
definitions[x] = new EncodingDefinition(stream);
}
SupportedStreamingModes = new ReadOnlyCollection <EncodingDefinition>(definitions);
KeyType = Library.GetSortedTreeType(KeyTypeID);
ValueType = Library.GetSortedTreeType(ValueTypeID);
break;
default:
throw new VersionNotFoundException("Unknown version code.");
}
}
/// <summary>
/// Reads the header data.
/// </summary>
/// <param name="stream"></param>
/// <param name="treeNodeType"></param>
/// <param name="blockSize"></param>
internal static void ReadHeader(BinaryStreamBase stream, out EncodingDefinition treeNodeType, out int blockSize)
{
stream.Position = 0;
byte version = stream.ReadUInt8();
if (version == 109)
{
stream.Position = 0;
stream.ReadGuid();
treeNodeType = new EncodingDefinition(stream.ReadGuid());
blockSize = stream.ReadInt32();
}
else if (version == 1)
{
blockSize = stream.ReadInt32();
treeNodeType = new EncodingDefinition(stream);
}
else
{
throw new VersionNotFoundException();
}
}
/// <summary>
/// Loads a <see cref="EncodingDefinition"/> from a stream
/// </summary>
/// <param name="stream">the stream to load from.</param>
public EncodingDefinition(BinaryStreamBase stream)
{
byte code = stream.ReadUInt8();
if (code == 1)
{
m_keyEncodingMethod = Guid.Empty;
m_valueEncodingMethod = Guid.Empty;
m_keyValueEncodingMethod = stream.ReadGuid();
IsKeyValueEncoded = true;
}
else if (code == 2)
{
m_keyEncodingMethod = stream.ReadGuid();
m_valueEncodingMethod = stream.ReadGuid();
m_keyValueEncodingMethod = Guid.Empty;
IsKeyValueEncoded = false;
}
m_hashCode = ComputeHashCode();
m_isFixedSizeEncoding = this == FixedSizeCombinedEncoding ||
this == FixedSizeIndividualEncoding;
}
/// <summary>
/// Loads the header.
/// </summary>
public void LoadHeader(BinaryStreamBase stream)
{
stream.Position = 0;
byte version = stream.ReadUInt8();
if (version == 109)
{
stream.Position = 0;
if (EncodingDefinition.FixedSizeCombinedEncoding != new EncodingDefinition(stream.ReadGuid()))
{
throw new Exception("Header Corrupt");
}
if (TreeNodeType != new EncodingDefinition(stream.ReadGuid()))
{
throw new Exception("Header Corrupt");
}
if (BlockSize != stream.ReadInt32())
{
throw new Exception("Header Corrupt");
}
if (stream.ReadUInt8() != 0)
{
throw new Exception("Header Corrupt");
}
LastAllocatedBlock = stream.ReadUInt32();
RootNodeIndexAddress = stream.ReadUInt32();
RootNodeLevel = stream.ReadUInt8();
}
else if (version == 1)
{
if (BlockSize != stream.ReadInt32())
{
throw new Exception("Header Corrupt");
}
if (TreeNodeType != new EncodingDefinition(stream))
{
throw new Exception("Header Corrupt");
}
LastAllocatedBlock = stream.ReadUInt32();
RootNodeIndexAddress = stream.ReadUInt32();
RootNodeLevel = stream.ReadUInt8();
}
else
{
throw new VersionNotFoundException();
}
}
