/// <summary>
/// Given an id obtained by some previous <code>Write</code> and a deserializer, recreates some data.
/// </summary>
/// <returns>Deserialized data.</returns>
public T Read <T>(PageableStoreId id, Func <BuildXLReader, T> deserializer)
{
Contract.Requires(id.IsValid);
Contract.Requires(Contains(id));
Contract.RequiresNotNull(deserializer);
ItemLocation itemLocation = m_itemLocations[id.Value];
return(itemLocation.PageStream.Read <T>(this, itemLocation.Offset, deserializer));
}
protected static SerializedState ReadSerializedState(BuildXLReader reader)
{
Contract.RequiresNotNull(reader);
bool debug = reader.ReadBoolean();
int streamCount = reader.ReadInt32();
int[] pageStreamLengths = new int[streamCount];
for (int i = 0; i < streamCount; i++)
{
pageStreamLengths[i] = reader.ReadInt32();
}
List <PageStreamBase> streams = new List <PageStreamBase>(streamCount);
for (int i = 0; i < streamCount; i++)
{
streams.Add(MemoryPageStream.Deserialize(reader, pageStreamLengths[i]));
}
Contract.Assert(streams.Count == streamCount);
int lastId = reader.ReadInt32();
ConcurrentDenseIndex <ItemLocation> offsets = new ConcurrentDenseIndex <ItemLocation>(debug);
for (uint i = 0; i < lastId; i++)
{
PageableStoreId id = new PageableStoreId(i + 1);
var streamIdentifier = reader.ReadInt32();
var offset = reader.ReadInt32();
offsets[id.Value] = new ItemLocation(streams[streamIdentifier], offset);
}
return(new SerializedState()
{
Debug = debug,
PageStreams = streams,
ItemLocations = offsets,
LastId = lastId,
});
}
public bool Contains(PageableStoreId id)
{
Contract.Requires(id.IsValid);
return(id.Value > 0 && id.Value <= m_lastId);
}